Relevant bibliographies by topics / Drought recovery

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Drought recovery'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Drought recovery"

1

Peterson, Tim J., M. Saft, M. C. Peel, and A. John. "Watersheds may not recover from drought." Science 372, no. 6543 (May 13, 2021): 745–49. http://dx.doi.org/10.1126/science.abd5085.

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The Millennium Drought (southeastern Australia) provided a natural experiment to challenge the assumption that watershed streamflow always recovers from drought. Seven years after the drought, the runoff (as a fraction of precipitation) had not recovered in 37% of watersheds, and the number of recovered watersheds was not increasing. When recovery did occur, it was not explained by watershed wetness. For those watersheds not recovered, ~80% showed no evidence of recovering soon, suggesting persistence within a low-runoff state. The post-drought precipitation not going to runoff was found to be likely going to increased evapotranspiration per unit of precipitation. These findings show that watersheds can have a finite resilience to disturbances and suggest that hydrological droughts can persist indefinitely after meteorological droughts.
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Bernardino, Paulo N., Martin Brandt, Wanda De Keersmaecker, Stéphanie Horion, Rasmus Fensholt, Ilié Storms, Jean-Pierre Wigneron, Jan Verbesselt, and Ben Somers. "Uncovering Dryland Woody Dynamics Using Optical, Microwave, and Field Data—Prolonged Above-Average Rainfall Paradoxically Contributes to Woody Plant Die-Off in the Western Sahel." Remote Sensing 12, no. 14 (July 21, 2020): 2332. http://dx.doi.org/10.3390/rs12142332.

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Dryland ecosystems are frequently struck by droughts. Yet, woody vegetation is often able to recover from mortality events once precipitation returns to pre-drought conditions. Climate change, however, may impact woody vegetation resilience due to more extreme and frequent droughts. Thus, better understanding how woody vegetation responds to drought events is essential. We used a phenology-based remote sensing approach coupled with field data to estimate the severity and recovery rates of a large scale die-off event that occurred in 2014–2015 in Senegal. Novel low (L-band) and high-frequency (Ku-band) passive microwave vegetation optical depth (VOD), and optical MODIS data, were used to estimate woody vegetation dynamics. The relative importance of soil, human-pressure, and before-drought vegetation dynamics influencing the woody vegetation response to the drought were assessed. The die-off in 2014–2015 represented the highest dry season VOD drop for the studied period (1989–2017), even though the 2014 drought was not as severe as the droughts in the 1980s and 1990s. The spatially explicit Die-off Severity Index derived in this study, at 500 m resolution, highlights woody plants mortality in the study area. Soil physical characteristics highly affected die-off severity and post-disturbance recovery, but pre-drought biomass accumulation (i.e., in areas that benefited from above-normal rainfall conditions before the 2014 drought) was the most important variable in explaining die-off severity. This study provides new evidence supporting a better understanding of the “greening Sahel”, suggesting that a sudden increase in woody vegetation biomass does not necessarily imply a stable ecosystem recovery from the droughts in the 1980s. Instead, prolonged above-normal rainfall conditions prior to a drought may result in the accumulation of woody biomass, creating the basis for potentially large-scale woody vegetation die-off events due to even moderate dry spells.
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Zhang, Lingnan, Hui Li, Yilin Ran, Keyi Wang, Xiaomin Zeng, and Xiaohong Liu. "Regional and Local Moisture Gradients Drive the Resistance to and Recovery from Drought of Picea crassifolia Kom. in the Qilian Mountains, Northwest China." Forests 10, no. 9 (September 19, 2019): 817. http://dx.doi.org/10.3390/f10090817.

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Increasing evidence suggests that extreme droughts cause more frequent tree growth reduction. To understand the consequences of these droughts better, this study used tree-ring cores from nine sites to investigate how moisture and altitudinal gradients affect the radial growth of Picea crassifolia Kom., a common species in the Qilian Mountains in northwest China. The total annual precipitation and mean annual temperature in the eastern region were higher than those in the western region of the Qilian Mountains. The trees in the eastern region showed stronger resistance to drought than those in the west, as they had a smaller difference in radial growth between drought disturbance and pre-drought disturbance. At the same time, the trees in the east showed weaker ability to recover from drought, as they had a subtle difference in radial growth between post-drought disturbance and drought disturbance. Furthermore, the trees in the east also showed weaker relative resilience to drought, as they had a small difference in radial growth between post-drought and drought disturbance weighted by growth in pre-drought disturbance. For trees below 3000 m a.s.l., trees with high resistance capacity usually had low recovery capacity and low relative resilience capacity. Trees at higher altitudes also showed stronger resistance to drought and weaker ability to recover from drought after a drought event than those at lower altitudes in the middle of the Qilian Mountains. Trees at lower altitudes in the middle of the Qilian Mountains had more difficulties recovering from more severe and longer drought events. In the context of global warming, trees in the western region and at lower altitudes should be given special attention and protection in forest management to enhance their resistance to extreme droughts.
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Domenghini, Jacob C., Dale J. Bremer, Jack D. Fry, and Gregory L. Davis. "Prolonged Drought and Recovery Responses of Kentucky Bluegrass and Ornamental Groundcovers." HortScience 48, no. 9 (September 2013): 1209–15. http://dx.doi.org/10.21273/hortsci.48.9.1209.

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Municipalities often restrict irrigation of urban landscapes, causing plants to experience drought stress. Few data are available regarding drought resistance of non-turfgrass landscape species. This study evaluated the performance of one turfgrass (Poa pratensis L. ‘Apollo’) and eight herbaceous landscape species (Achillea millifolium L., Ajuga reptans L. ‘Bronze Beauty’, Liriope muscari Decne., Pachysandra terminalis Siebold and Zucc., Sedum album L., Thymus serpyllum L., Vinca major L., and Vinca minor L.) during a severe drydown and subsequent recovery. This greenhouse study was conducted in the spring/summer and again in the fall of 2010. S. album performed the best, averaging 254 days to decline to a drought rating of 1 (1 to 9 scale, 1 = dead/dormant and 9 = best quality). L. muscari and P. terminalis also performed well, averaging 86 days to a drought rating of 1. V. minor and V. major declined faster than the previous species, averaging 63 days. A. millifolium, A. reptans, P. pratensis, and T. serpyllum declined the fastest to a drought rating of 1 (mean 52 days). Thereafter, the only species to recover after 60 days of resuming irrigation were P. pratensis [46% pot cover (PC)], S. album (38% PC), and V. major (35% PC) in the spring/summer study; no species recovered during the fall study. Results indicate S. album, L. muscari, and P. terminalis are the most drought-resistant among the species evaluated in landscapes where severe drought may occur. V. minor and V. major are good selections in less severe droughts as is P. pratensis if periods of dormancy are acceptable.
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Abid, Muhammad, Zhongwei Tian, Syed Tahir Ata-Ul-Karim, Feng Wang, Yang Liu, Rizwan Zahoor, Dong Jiang, and Tingbo Dai. "Adaptation to and recovery from drought stress at vegetative stages in wheat (Triticum aestivum) cultivars." Functional Plant Biology 43, no. 12 (2016): 1159. http://dx.doi.org/10.1071/fp16150.

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Studying plants’ capability to adapt and recover from drought stress is essential because of the ever-changing nature of drought events. To evaluate the genotypically variable morpho-physiological adaptations to drought stress and recovery after re-watering, two wheat cultivars (Luhan-7 and Yangmai-16) were pot-cultured under three levels of water stress: severe (35–40% field capacity, FC) and moderate water deficits (55–60% FC) and well-watered conditions. Drought stress was applied at tillering (Feekes 2 stage) and jointing (Feekes 6 stage), respectively, followed by re-watering, and we observed changes in leaf characteristics, growth and physiological activities during water stress and rewatering periods as well as final grain yield traits at maturity. Results showed that drought stress adaptability associated with reduced leaf area, higher leaf thickness, chlorophyll, leaf dry matter and maintenance of leaf water potential were more strongly pronounced in Luhan-7 than in Yangmai-16. Under moderate stress both cultivars exhibited a small decrease in leaf gas-exchange and chlorophyll fluorescence activities, followed by rapid recovery. Under severe drought stress, Yangmai-16 displayed relatively less adaptability to drought, with a slower recovery after re-watering and a greater decrease in grain yield. It was concluded that even though crop growth rate completely recovered after re-watering, the final dry matter and grain yield outcomes were affected by pre-drought stress, and were dependant on the drought intensity, adaptability and recovery differences of the cultivars and growth stage. It was also concluded that genotypic variations in adaptability and recovery from drought stress are the indicators of drought tolerance and grain yield sustainability in wheat.
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De Faria, Bruno L., Gina Marano, Camille Piponiot, Carlos A. Silva, Vinícius de L. Dantas, Ludmila Rattis, Andre R. Rech, and Alessio Collalti. "Model-Based Estimation of Amazonian Forests Recovery Time after Drought and Fire Events." Forests 12, no. 1 (December 23, 2020): 8. http://dx.doi.org/10.3390/f12010008.

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In recent decades, droughts, deforestation and wildfires have become recurring phenomena that have heavily affected both human activities and natural ecosystems in Amazonia. The time needed for an ecosystem to recover from carbon losses is a crucial metric to evaluate disturbance impacts on forests. However, little is known about the impacts of these disturbances, alone and synergistically, on forest recovery time and the resulting spatiotemporal patterns at the regional scale. In this study, we combined the 3-PG forest growth model, remote sensing and field derived equations, to map the Amazonia-wide (3 km of spatial resolution) impact and recovery time of aboveground biomass (AGB) after drought, fire and a combination of logging and fire. Our results indicate that AGB decreases by 4%, 19% and 46% in forests affected by drought, fire and logging + fire, respectively, with an average AGB recovery time of 27 years for drought, 44 years for burned and 63 years for logged + burned areas and with maximum values reaching 184 years in areas of high fire intensity. Our findings provide two major insights in the spatial and temporal patterns of drought and wildfire in the Amazon: (1) the recovery time of the forests takes longer in the southeastern part of the basin, and, (2) as droughts and wildfires become more frequent—since the intervals between the disturbances are getting shorter than the rate of forest regeneration—the long lasting damage they cause potentially results in a permanent and increasing carbon losses from these fragile ecosystems.
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Gerdener, Helena, Olga Engels, and Jürgen Kusche. "A framework for deriving drought indicators from the Gravity Recovery and Climate Experiment (GRACE)." Hydrology and Earth System Sciences 24, no. 1 (January 16, 2020): 227–48. http://dx.doi.org/10.5194/hess-24-227-2020.

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Abstract. Identifying and quantifying drought in retrospective is a necessity for better understanding drought conditions and the propagation of drought through the hydrological cycle and eventually for developing forecast systems. Hydrological droughts refer to water deficits in surface and subsurface storage, and since these are difficult to monitor at larger scales, several studies have suggested exploiting total water storage data from the GRACE (Gravity Recovery and Climate Experiment) satellite gravity mission to analyze them. This has led to the development of GRACE-based drought indicators. However, it is unclear how the ubiquitous presence of climate-related or anthropogenic water storage trends found within GRACE analyses masks drought signals. Thus, this study aims to better understand how drought signals propagate through GRACE drought indicators in the presence of linear trends, constant accelerations, and GRACE-specific spatial noise. Synthetic data are constructed and existing indicators are modified to possibly improve drought detection. Our results indicate that while the choice of the indicator should be application-dependent, large differences in robustness can be observed. We found a modified, temporally accumulated version of the Zhao et al. (2017) indicator particularly robust under realistic simulations. We show that linear trends and constant accelerations seen in GRACE data tend to mask drought signals in indicators and that different spatial averaging methods required to suppress the spatially correlated GRACE noise affect the outcome. Finally, we identify and analyze two droughts in South Africa using real GRACE data and the modified indicators.
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Partelli-Feltrin, Raquel, Daniel M. Johnson, Aaron M. Sparks, Henry D. Adams, Crystal A. Kolden, Andrew S. Nelson, and Alistair M. S. Smith. "Drought Increases Vulnerability of Pinus ponderosa Saplings to Fire-Induced Mortality." Fire 3, no. 4 (September 28, 2020): 56. http://dx.doi.org/10.3390/fire3040056.

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The combination of drought and fire can cause drastic changes in forest composition and structure. Given the predictions of more frequent and severe droughts and forecasted increases in fire size and intensity in the western United States, we assessed the impact of drought and different fire intensities on Pinus ponderosa saplings. In a controlled combustion laboratory, we exposed saplings to surface fires at two different fire intensity levels (quantified via fire radiative energy; units: MJ m−2). The recovery (photosynthesis and bud development) and mortality of saplings were monitored during the first month, and at 200- and 370-days post-fire. All the saplings subjected to high intensity surface fires (1.4 MJ m−2), regardless of the pre-fire water status, died. Seventy percent of pre-fire well-watered saplings recovered after exposure to low intensity surface fire (0.7 MJ m−2). All of the pre-fire drought-stressed saplings died, even at the lower fire intensity. Regardless of the fire intensity and water status, photosynthesis was significantly reduced in all saplings exposed to fire. At 370 days post-fire, burned well-watered saplings that recovered had similar photosynthesis rates as unburned plants. In addition, all plants that recovered or attempted to recover produced new foliage within 35 days following the fire treatments. Our results demonstrate that the pre-fire water status of saplings is an important driver of Pinus ponderosa sapling recovery and mortality after fire.
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Mukeshimana, Gerardine, Amy L. Lasley, Wayne H. Loescher, and James D. Kelly. "Identification of Shoot Traits Related to Drought Tolerance in Common Bean Seedlings." Journal of the American Society for Horticultural Science 139, no. 3 (May 2014): 299–309. http://dx.doi.org/10.21273/jashs.139.3.299.

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Drought is an important abiotic stress that limits common bean (Phaseolus vulgaris) productivity. The objective of this study was to determine shoot traits that are associated with drought tolerance in common bean seedlings. Ten common bean genotypes consisting mainly of cultivars and breeding lines from the Mesoamerican race of the Middle American gene pool were first evaluated in the greenhouse. Genotypes were grown in a shallow soil profile to limit root growth and assess shoot phenotypes under stress. Water stress was imposed by withholding watering for 24 days after planting. Traits evaluated included wilting, unifoliate senescence, stem greenness, and recovery from drought. Biomass and number of pods/plant produced after drought recovery were evaluated to quantify the effect of early drought stress on bean growth and reproduction. A second group of 94 common bean genotypes from the Bean Coordinated Agricultural Project (BeanCAP) were evaluated using the same protocol to determine the genetic variability for the same traits in a wider range of genotypes. In general, genotypes known to possess drought avoidance in the field conferred by deep rooting traits performed poorly in these conditions suggesting that the assay could be used to identify seedling shoot traits that contribute to drought tolerance. Genotypes from race Mesoamerica showed the greatest range in wilting. Genotypes that showed a slow rate of wilting maintained a green stem and had a higher recovery rate after watering. Importantly, these genotypes demonstrated a smaller reduction in biomass and pod number under stress compared with non-stress treatments. A few genotypes recovered completely despite expressing severe wilting, whereas the majority of genotypes with high wilting rates did not recover. Among the BeanCAP materials, genotypes bred in the rainfed midwestern United States showed overall better recovery than those bred under the irrigated production system used in the western United States. Because recovery from drought is a prerequisite to plant regrowth, biomass, and pod production after drought stress, factors that contribute to recovery were studied. Stem greenness was highly positively correlated to the recovery, whereas wilting was negatively correlated to the recovery. In a regression analysis, stem greenness and slow wilting were found to be important contributors to the variability of recovery. In addition, photosynthetic rate and stomatal conductance (gS) explained variation in wilting and stem greenness. These results suggest that wilting and stem greenness might be useful traits to screen for drought tolerance in seedlings of common bean.
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Bassirirad, H., and MM Caldwell. "Root Growth, Osmotic Adjustment and NO3- Uptake During and After a Period of Drought in Artemisia tridentata." Functional Plant Biology 19, no. 5 (1992): 493. http://dx.doi.org/10.1071/pp9920493.

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Nitrate uptake in pot-grown, well watered and water-stressed Artemisia tridentata seedlings was determined both during drought and during recovery from drought using >15NO3-. Water deficit caused a 40% decrease in NO3- uptake compared to well watered plants and the restricted NO3- uptake persisted 4 days after rewatering. Between 4 and 14 days after rewatering, NO3- uptake in previously stressed plants was the same as that of the controls. Root relative growth rate (RGR) during the drying cycle was about one-fourth that of the control, but recovered to the control level within 4 days after rewatering. Between 4 and 14 days after rewatering, the previously droughted plant roots exhibited nearly three times greater RGR than the control plant roots. Estimates of root solute content indicated that at no time during the stress and recovery periods did the droughted roots exhibit osmotic adjustment. Changes in root growth properties were uncoupled from turgor. During the recovery period, drought-induced adjustments in cell wall yielding properties are thought to have increased root growth in previously stressed seedlings. Nevertheless, the greater root growth of previously droughted plants did not result in more NO3- acquisition than in control plants. The pattern of NO3- uptake upon rewatering was apparently more closely associated with root uptake capacity.
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Dissertations / Theses on the topic "Drought recovery"

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Ahmadi, Behzad. "On the Drought Recovery and Resiliency: How Terrestrial and Riverine Ecosystems Recover from Agricultural and Hydrological Droughts." PDXScholar, 2019. https://pdxscholar.library.pdx.edu/open_access_etds/4834.

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Climate extremes, in particular droughts are significant driving forces towards riverine and terrestrial ecosystems disturbance. Drought impacts on stream ecosystems include losses that can either be direct (e.g. destruction of habitat for aquatic species) or indirect (e.g. deterioration of water quality, soil quality, and increased chance of wildfires). This study investigates hydrological and agricultural droughts and their recovery durations. For the riverine ecosystems, this study combines hydrologic drought and water quality changes during droughts and represents a multi-stage framework to detect and characterize hydrological droughts, while considering water quality parameters. Hydrological droughts are categorized into three stages of growth, persistence, retreat, and water quality variables (i.e., water temperature, dissolved oxygen concentration, and turbidity) are utilized to further investigate drought recovery. The framework is applied to 400 streamflow gauges across the Contiguous United States (CONUS) over the study period of 1950-2016. The framework is assessed and validated based on three drought events declared by the state of California in 2002, 2008, and for the 2012 US drought, which affected most of the nation. Results reveal the duration, frequency, and severity of historical droughts in various regions, additionally, duration of each stage of drought (i.e., growth, persistence, and retreat) is also assessed and the spatial patterns are diagnosed across the CONUS. Varied drought recovery durations are perceived for different water quality variables, and in general, it takes about two more months for water quality variables to recover from a drought, following the hydrological drought termination. For the terrestrial ecosystem, this study evaluated drought impacts on gross primary productivity (GPP), evapotranspiration (ET), and water use efficiency (WUE = GPP/ET) of different terrestrial ecosystems over the CONUS, as well as the drought-recovery during the period of 2000 to 2014. The response of WUE to drought showed large differences in various regions and biomes. WUE for arid ecosystems typically showed a positive response (increase) to drought, whereas WUE for humid ecosystems showed both positive and negative response to drought. The results revealed that WUE is correlated with drought severity, and for more severe droughts, WUE changes more significantly. Furthermore, terrestrial drought recovery shows a positive correlation with drought severity and in regions that experienced more severe drought episodes, ecosystem requires longer period to recover.
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Mullen, Caroline. "An investigation into the effects of drought and drought recovery on macroinvertebrate communities." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/7137/.

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The effect of drought on freshwater ecosystems is a growing environmental concern. This study aimed to determine the effect of the supra-seasonal 2010-2012 drought on the macroinvertebrate communities and functional feeding groups (FFG) of chalk streams. Three rivers were sampled during and after the drought, three sites were analysed on each river, a perennial control site, a dewatering site (shallow during drought) and a rewetted site (dry during drought). All wetted sites were sampled for macroinvertebrates, algae, velocity and depth monthly. In addition an in-situ experiment investigated grazing rates in dewatering, rewetted and perennial sites and a mesocosm experiment investigated the effect of reduced water velocity and temporary drying on grazing function and macroinvertebrate mortality. Macroinvertebrate data were analysed for structural and functional changes in communities and algal data were analysed for changes of biomass both during drought and recovery. Both found rapid recovery post-drought with high incidence of resilience in the macroinvertebrate communities. Functional recovery was determined by investigating grazing rates in dewatering, rewetted and perennial sites. Algal and macroinvertebrate biomass, and grazing function recovered within a month of rewetting. Despite a rapid recovery of overall biomass and grazing function, FFG results showed delayed effects, and four months following drought differences were still present. Mesocosm experiments showed that macroinvertebrate mortality increased due to dewatering for some species, however slower velocity had little effect. Thus, this study showed that ecological function can return despite changes to macroinvertebrate community structure, indicating that functional redundancy promotes the resilience of chalk stream communities to drought.
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Kebede, Yohannes. "Economic evaluation of post-drought recovery agricultural project : the case of Tegulet and Bulga District, Shoa Province, Ethiopia." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63894.

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Kolus, Hannah. "Assessing Terrestrial Biosphere Model Simulation of Ecosystem Drought Response and Recovery." Thesis, Northern Arizona University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10283123.

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Severe drought plays a critical role in altering the magnitude and interannual variability of the net terrestrial carbon sink. Drought events immediately decrease net primary production (NPP), and drought length and magnitude tend to enhance this negative impact. However, satellite and in-situ measurements have also indicated that ecosystem recovery from extreme drought can extend several years beyond the return to normal climate conditions. If an ecosystem’s drought recovery time exceeds the time interval between successive droughts, these legacy effects may reinforce the impact of future drought. Since the frequency and severity of extreme climate events are expected to increase with climate change, both the immediate and prolonged impact of drought may contribute to amplified climate warming by decreasing the strength of the land carbon sink. However, it is unknown whether terrestrial biosphere models capture the impact of drought legacy effects on carbon stocks and cycling. Using a suite of twelve land surface models from the Multi-scale Synthesis and Terrestrial Model Intercomparison Project (MsTMIP), we assessed model ability to simulate drought legacy effects by analyzing the modeled NPP response to drought events across forested regions of the US and Europe. We found that modeled drought legacy effects last about one year (2% reduction in NPP), with complete NPP recovery in the second post-drought year. Since observations suggest that legacy effects extend up to four years post-drought, with a 9% growth reduction in the first post-drought year, models appear to underestimate both the timescales and magnitude of drought legacy effects. We further explored vegetation sensitivity to climate anomalies through global, time-lagged correlation analysis of NPP and climatic water deficit. Regional differences in the lag time between climate anomaly and NPP response are prevalent, but low sensitivities (correlations) characterize the entire region. Significant correlations coincided with characteristic lag times of 0 to 6 months, indicating relatively immediate NPP response to moisture anomalies. Model ability to accurately simulate vegetation’s response to drought and sensitivity to climate anomalies is necessary in order to produce reliable forecasts of land carbon sink strength and, consequently, to predict the rate at which climate change will progress in the future. Thus, the discrepancies between observed and simulated vegetation recovery from drought points to a potential critical model deficiency.

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Busso, Carlos A. "Factors Affecting Recovery from Defoliation during Drought in Two Aridland Tussock Grasses." DigitalCommons@USU, 1988. https://digitalcommons.usu.edu/etd/6455.

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The importance of several factors in limiting recovery from defoliation was investigated in field-grown plants of Agropyron desertorum and Agropyron spicatum exposed to drought , natural or irrigated conditions. Leaf extension rate, components of leaf area production, number of metabolically active axillary buds and carbohydrate availability were examined on the same plants immediately after defoliation and/or in the following spring from 1984 until 1986. The diurnal course of leaf growth did not relate to turgor pressure in the expanded portion of leaf laminae. Rather growth was apparently associated with air temperature. Leaf extension rate was lower under drought than under better moisture levels during 1984 to 1986. For both species, reduced growth rates and shorter growth periods resulted in reduced tiller height, leaf number and leaf size under drought compared with natural or irrigated conditions in 1985 and 1986, but not in 1984. As a result, leaf area and/or yields were also lower under drought in 1985 and 1986, and lowest under drought plus defoliation in 1986. Production of daughter tillers immediately after defoliation was also lowest under drought. Regrowth capacity of both species was not limited by axillary bud number, size or viability immediately after defoliation under any water level in 1986. In early spring, however, tiller number and growth were lower on clipped than on unclipped plants of both species under drought and irrigated conditions in 1986, and under all water levels in 1987; this resulted in considerably reduced photosynthetic canopies on clipped plants. Crown and root total nonstructural carbohydrate (TNC) pools were higher under drought than under better moisture levels in A. desertorum and A. spicatum in early spring 1986. These high pools of TNC apparently enhanced the production of etiolated regrowth in both species when meristematic limitations did not exist in early spring. The productive potential of both Agropyron species will probably not be affected following a late and severe defoliation under drought. However, vegetative growth and/or productivity, and probably the persistence of these species in the community, will be reduced after two or more years of late and heavy defoliations under drought.
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Murdock, Justin N. "Regulators of stream ecosystem recovery from disturbance." Diss., Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/906.

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Goldsby, Anthony Lee. "Establishment, drought tolerance and recovery, and canopy analysis of turfgrasses in the transition zone." Diss., Kansas State University, 2013. http://hdl.handle.net/2097/15416.

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Doctor of Philosophy
Department of Horticulture, Forestry, and Recreation Resources
Dale J. Bremer
Jack Fry
Increasing water scarcity may result in greater irrigation restrictions for turfgrass. Drought tolerance and recovery of Kentucky bluegrasses (Poa. pratensis L.) (KBG) were evaluated during and after 88 and 60 day dry downs in 2010 and 2011, respectively, under a rainout shelter. Changes in green coverage were evaluated with digital images. Green coverage declined slowest during dry downs and increased fastest during recoveries in the cultivar ‘Apollo’, indicating it had superior drought tolerance. Electrolyte leakage, photosynthesis, and leaf water potential were evaluated in 7 KBG cultivars during and after the dry downs. Soil moisture at 5 and 20 cm was measured. There were generally no differences in physiological parameters among cultivars during or after dry down. The highest reduction in soil moisture at 5 and 20 cm was in Apollo, suggesting it had a better developed root system for mining water from the profile during drought. Weed prevention and turfgrass establishment of ‘Legacy’ buffalograss (Buchloe dactyloides [Nutt.] Engelm.) and ‘Chisholm’ zoysiagrass (Zoysia japonica Steud.) grown on turf reinforcement mats (TRM) was evaluated. ‘Chisholm’ zoysiagrass stolons grew under the TRM; as such, use of TRM for this cultivar is not practical. Buffalograss had 90% or greater coverage when established on TRM in 2010 and 65% or greater coverage in 2011; coverage was similar to that in oxadiazon-treated plots at the end of each year. ‘Legacy’ buffalograss plugs were established on TRM over plastic for 3 weeks, stored in TRM under tree shade for 7, 14, or 21 days, and evaluated for establishment after storage. In 2010, plugs on mats stored for 7 days had similar coverage to the control, but in 2011 displayed similar coverage to plugs stored on TRM for 14 or 21 day treatments. Green leaf are index (LAI) is an important indicator of turfgrass performance, but its measurement is time consuming and destructive. Measurements using hyperspectral radiometry were compared with destructive measurements of LAI. Results suggest spectral radiometry has potential to accurately predict LAI. The robustness of prediction models varied over the growing season. Finding one model to predict LAI across and entire growing season still seems unrealistic.
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Woods, Natasha Nicole. "The Relative Importance of Abiotic and Biotic Factors for Seedling Establishment in the Colorado Desert, CA." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429882344.

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Alshugeairy, Zaniab. "Genetic, phenomic and molecular analysis of drought avoidance and recovery traits in rice for the improvement of plant breeding." Thesis, University of Aberdeen, 2013. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=203868.

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Rice (Oryza sativa L.) is one of the main staple foods of the world. With the increase of population and the deficit of irrigated water, the increase in rice production that is predicted will be dependent on areas prone to drought. Root depth is important for plant growth and survival during drought because of its role in facilitating water uptake from deep soil layers. By advances in genomics, the plant root systems can be linked to quantitative trait locus (QTL) information to achieve a most beneficial design of root system architecture. There is a demand to develop and validate techniques that permit estimation of the root system. Therefore, two techniques (root penetration ability to non-woven fabric and a buried herbicide method at depth 30 cm) were used in this study to assess root traits in a total of 36 rice cultivars. The results from these screens were assessed with root traits measured on the same cultivars in the rhizotrons and hydroponic experiment. Correlations between these methods showed that herbicide score at day 35 was most strongly related to traits of the rhizotron experiment, especially number of roots passed 50 cm at 35 days, root angle at day 21, root thickness, water use and % root mass. Using all of these traits obtained in the rhizotron in a best subset regression suggests that up to 71% of the variation in herbicide score can be explained. These data strongly imply that symptoms are related to root development and transpiration demand and are therefore ideal for assessing water extraction by roots at depth. The herbicide method has been applied to screen root depth in 138 recombinant inbred lines derived from crossing between two subspecies Indica Bala and Japonica Azucena. Analysis of mapping population revealed two putative QTLs on chromosome 6 near marker RZ682 and one on chromosome 7 near marker RG351 and two significant QTLs near marker G1010b and G1073 for root depth on chromosome 8. The same method has been used to evaluate root depth in 325 rice diversity panel allowing high resolution genetic mapping. Using efficient mixed model (statistical analyses for genome wide association), four associations were detected, two on chromosome 1 and one on each of chromosome 4 and 6. In addition, the same rice diversity panel has been evaluated for drought avoidance by assessing leaf rolling (as one plant mechanism against drought stress) and drought recovery. A total of three significant associations, on chromosomes 4, 6 and 7 were identified for leaf rolling while only one significant association on chromosome 2 for drought recovery was found. Positional candidate genes underneath QTLs were examined bioinformatically and through the literature revealing several interesting genes which may offer potential for developing drought resistant rice cultivars. Therefore, developing a cost effective high-throughput system that can measure traits related to drought avoidance and drought recovery on a large number of plants would aid genetic studies in breeding and gene identification.
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Correia, Barbara dos Santos. "Linking omics and ecophysiology in Eucalytus: unravelling stress tolerance in a forest species." Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/18399.

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Doutoramento em Biologia
Eucalyptus plantations are among the most productive forest stands worldwide. In Portugal and Spain, they are widely used for pulp production and as an energy crop. However, the region’s Mediterranean climate, with increasingly severe summer drought, negatively affects eucalypt growth and increases mortality. The aim of this doctoral thesis was to unravel drought tolerance in Eucalyptus globulus by investigating and interconnecting information on the processes mediating water deficit and rehydration, from gene and molecular regulation to physiological responses and plant performance, using two different genotypes and different stress trials. The thesis disclosed herein is presented in a series of research papers (chapters 2, 3, 4 and 5), preceded by a general introduction (chapter 1) and closed with concluding remarks (chapter 6). Chapter 2 describes a greenhouse trial and a slowly imposed water deficit, and is divided into three subchapters. Two genotypes (AL-18 and AL-10) were submitted to a 3-week water stress period at two different intensities (18% and 25% of field capacity), followed by 1 week of rewatering. Recovery was assessed 1 day and 1 week after rehydration. Several phytohormones were monitored in leaves, xylem sap and roots, 2 h, 4 h, 24 h, and 168 h after rewatering. Water deficit reduced height, biomass, water potential, and gas exchange. Contrarily, the levels of pigments, chlorophyll fluorescence parameters and MDA increased. ABA and ABA-GE levels increased, and JA content decreased in leaves and increased in xylem sap. During recovery, most of the physiological and biochemical responses of stressed plants were reversed. Comparative proteome (using difference gel electrophoresis) and metabolome (using gas chromatography–mass spectrometry) analyses enabled the separation and isolation of 2031 peptide spots, 217 of which were identified, and the detection of 121 polar metabolites. The analysis of the resilient clone AL-18, which presented a response network very distinct from the responsive clone AL-10, reinforced the role of specific photosynthetic and defence-related proteins as key players in mediating drought tolerance and revealed new players: glutamine synthetase, malate dehydrogenase and isoflavone reductase-like protein. Chapter 3 regards a climate chamber trial and a sudden water shortage, and is divided in two subchapters. The relative expression of 12 transcripts was analysed by quantitative PCR in two clones with different degrees of tolerance (AL-18 and AL-13) 7 and 11 days after water withholding and rehydration (2 h and 3 days after rewatering). Sudden water shortage was more detrimental to the plants than when slowly imposed, with heavier outcomes in clone AL-13, including plant death. Potential molecular indicators linked to enhanced water stress tolerance in Eucalyptus globulus were identified: rubisco activase (RCA), ferredoxin-NADP(H) oxireductase (FNR), mitochondrial malate dehydrogenase (mMDH), peroxisomal catalase (CAT) and isoflavone reductase (IFR). Afterwards, several biochemical markers of oxidative stress and DNA methylation patterns were quantified in the leaves of AL-18. The alterations detected using global and specific indicators reflected the parallel induction of redox and complex DNA methylation changes occurring during stress imposition and relief. Chapter 4 reports a field trial: the previously identified set of indicators for selection of water stress tolerance was tested in field-grown AL-18 and AL-13. Some of the plants were irrigated (IR), and others were left under environmental conditions of reduced rainfall (NI) during six and a half weeks prior to rewatering. Clone AL-18 showed few fluctuations in the conditions tested, and the alterations found in clone AL-13 highlighted an induction of photosynthetic and photorespiration metabolism after artificial rehydration. The results corroborated that responses to field conditions cannot be extrapolated from a stress applied individually in the context of developing selection markers. Chapter 5 describes a climate chamber trial that tested the isolated and combined effect of drought and heat. Physiological, biochemical and metabolomic alterations were monitored in AL-18 after a 5-day of consistent drought and/or 4 h at 40ºC. Testing drought-stressed plants subject to a heat shock revealed a decrease in gas exchange, Ψpd and JA, no alterations in electrolyte leakage, MDA, starch and pigments and increased glutathione pool in relation to control. The induction of cinnamate was a novel response triggered only by the combined stress. These results highlighted that the combination of drought and heat provides significant protection from more detrimental effects of drought-stressed eucalypts, confirming that combined stresses alter plant metabolism in a novel manner that cannot be extrapolated by the sum of the different stresses applied individually. This thesis describes a number of biological responses that enable E. globulus to thrive under conditions of water deficit and provides useful information of pathways to be explored in order to find suitable markers of abiotic stress tolerance in this species. Despite that, a bigger challenge remains and consists of the need to focus our studies in more realistic, field-like experiments, at least in the context of finding suitable selection markers in the climate change era.
As plantações de eucalipto estão entre as mais produtivas do mundo inteiro. Em Portugal e Espanha, são amplamente utilizadas na produção de polpa e como fonte de energia. No entanto, o clima mediterrânico da região, com secas de verão cada vez mais severas, afeta negativamente o crescimento do eucalipto e aumenta a sua mortalidade. Esta tese de doutoramento tem como objetivo desvendar a tolerância à seca da espécie Eucalyptus globulus, investigando e interligando informação dos processos que medeiam o défice hídrico e a reidratação, desde a regulação genética e molecular até às respostas fisiológicas e desempenho da planta, utilizando dois genótipos distintos e diferentes ensaios experimentais. Esta tese está estruturada sob a forma de estudos científicos (capítulos 2, 3, 4 e 5), precedidos por uma introdução geral (capítulo 1), e termina com as notas finais (capítulo 6). O capítulo 2 descreve um ensaio de estufa e um défice hídrico imposto lentamente, e está dividido em 3 subcapítulos. Dois genótipos (AL-18 e AL-10) foram sujeitos a um período de stress hídrico de 3 semanas com duas intensidades diferentes (18% e 25% da capacidade de campo), seguido de uma semana de reidratação. A recuperação foi avaliada um dia e uma semana depois da reidratação. Várias fitohormonas foram monitorizadas nas folhas, seiva xilémica e raízes, 2 h, 4 h, 24 h e 168 h depois da reidratação. A falta de água reduziu a altura, a biomassa, o potencial hídrico e as trocas gasosas. Pelo contrário, os níveis de pigmentos, parâmetros da fluorescência da clorofila e MDA aumentaram. Os níveis de ABA e de ABA-GE aumentaram, enquanto o JA diminuiu nas folhas e aumentou na seiva xilémica. Durante a recuperação, a maioria das alterações fisiológicas e bioquímicas provocadas pelo stress reverteram. Análises comparativas do proteoma (analisado por eletroforese em gel diferencial) e do metaboloma (analisado por cromatografia gasosa com espetrometria de massa) permitiram a separação de 2031 pontos peptídicos, dos quais 217 foram identificados, e a deteção de 121 metabolitos polares. A análise do clone resiliente AL-18, que apresentou uma rede de resposta bem distinta do clone responsivo AL-10, reforçou o papel de proteínas específicas da fotossíntese e relacionadas com a defesa como intermediários chave na tolerância à seca e revelou novos intermediários: glutamina sintetase, malato desidrogenase e isoflavona redutase. O capítulo 3 diz respeito a um ensaio em câmara climática e a uma rápida escassez de água, e está dividido em 2 subcapítulos. A expressão relativa de 12 transcritos foi analisada por PCR quantitativo em dois clones com diferentes graus de tolerância (AL-18 e AL-13) depois de 7 e 11 dias sem qualquer rega e posterior reidratação. A rápida escassez de água foi mais prejudicial para as plantas do que o défice hídrico imposto lentamente, com maior visibilidade no clone AL-13 que revelou morte de algumas plantas. Indicadores moleculares potencialmente ligados a uma tolerância aumentada foram identificados: rubisco ativase (RCA), ferredoxina-NADP(H) oxidorredutase (FNR), malato desidrogenase mitocondrial (mMDH) catalase peroxissomal (CAT) e isoflavona redutase (IFR). De seguida, vários marcadores bioquímicos de stress oxidativo e padrões de metilação do DNA foram quantificados nas folhas do clone AL-18. As alterações detetadas utilizando indicadores globais e específicos refletiram a indução de complexas modificações redox e de metilação do DNA, que ocorrem paralelamente durante a imposição e interrupção do stress. O capítulo 4 reporta um ensaio de campo: o conjunto de indicadores de seleção de tolerância hídrica identificado anteriormente foi testado em AL-18 e AL-13 plantados no campo. Algumas das plantas foram regadas artificialmente (IR) e outras foram deixadas nas condições ambientais de precipitação reduzida (NI) durante seis semanas e meia antes de voltar a regar. O clone AL-18 mostrou pouca variação nas condições testadas, e as alterações encontradas no clone AL-13 realçaram a indução do metabolismo fotossintético e fotorespiratório após a reidratação artificial. Estes resultados mostraram que as respostas das plantas no campo não podem ser extrapoladas a partir do estudo de um stress aplicado individualmente, particularmente no contexto de encontrar marcadores de seleção. O capítulo 5 descreve um ensaio em câmara climática que testou o efeito isolado e combinado de seca e calor. Alterações fisiológicas, bioquímicas e metabolómicas foram monitorizadas no clone AL-18 após 5 dias de seca consistente e/ou 4 h a 40ºC. Testar plantas em stress hídrico sujeitas a um choque térmico revelou uma diminuição das trocas gasosas, do potencial hídrico e do JA, nenhum efeito a nível da perda de eletrólitos, MDA, amido e pigmentos e um aumento na glutationa, em comparação com condições controlo. O stress combinado induziu também a produção do cinamato, uma resposta nova. Estes resultados realçam que a combinação de seca e calor fornece uma proteção significante contra os efeitos mais prejudiciais da seca isolada em eucalipto, confirmando que o stress combinado altera o metabolismo das plantas de uma forma nova que não pode ser extrapolada pela soma dos diferentes stresses aplicados individualmente. Esta tese descreve um conjunto de respostas biológicas que permitem ao eucalipto manter-se em condições de défice hídrico e revela informação útil de várias vias metabólicas a serem exploradas de modo a encontrar marcadores de tolerância ao stress abiótico apropriados. Apesar disso, um desafio maior permanece. Consiste na necessidade de focarmos os nossos estudos em experiências mais realistas, que mimetizem as condições de campo, pelo menos no contexto de encontrarmos marcadores de seleção ajustados a uma era de alterações climáticas.
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Books on the topic "Drought recovery"

1

D'Silva, Brian C. Sudan: Policy reforms and prospects for agricultural recovery after the drought. Washington, D.C: International Economics Division, Economic Research Service, U.S. Dept. of Agriculture, 1985.

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(Zambia), Programme Against Malnutrition. Food Security Pack-Emergency Drought Recovery Project (FSP-EDRP) 2004/2005 agricultural season: Highlights report. Lusaka: PAM, 2005.

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Musa, Temba M. Impact assessment of the 1995/1996 Drought Recovery Crop-Pack Programme in three provinces in Zimbabwe. Harare, Zimbabwe: The Project, 1996.

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Botswana and University of Oxford. Food Studies Group., eds. Report on the evaluation of the drought relief and recovery programme, 1982-1990. [Gaborone]: the Government, 1990.

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Project, Smallholder Services Rehabilitation, and Zambia. Dept. of Agriculture. Adaptive Research Planning Team., eds. Drought recovery assessment: Immediate requirements and medium term strategies : (for drought-prone areas in Eastern, Lusaka, Southern, and Western Provinces). [Lusaka: Ministry of Agriculture, Food, and Fisheries, Dept. of Agriculture, the Team, 1992.

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Muhammad, Aḥmad Abdel Ghaffar, Organization for Social Science Research in Eastern and Southern Africa., and Broadening Access Strengthening Input Market System (U.S.). Collaborative Research Support Program., eds. Post-drought recovery strategies among the pastoral households in the Horn of Africa: A review. Addis Ababa: Organization for Social Science Research in Eastern and Southern Africa, 2002.

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E mergency Drought Recovery Project-- Food Security Pack (EDRP-FSP): Third quarter report for May-July 2004. [Lusaka]: Programme Against Malnutrition, 2004.

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Book chapters on the topic "Drought recovery"

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Browne, Alison L., Steve Dury, Cheryl de Boer, Isabelle la Jeunesse, and Ulf Stein. "Governing for Drought and Water Scarcity in the Context of Flood Disaster Recovery: The Curious Case of Somerset, United Kingdom." In Governance for Drought Resilience, 83–107. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29671-5_5.

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Novakova, M., P. Dobrev, V. Motyka, A. Gaudinova, J. Malbeck, J. Pospisilova, D. Haisel, et al. "Cytokinin Function in Drought Stress Response and Subsequent Recovery." In Biotechnology and Sustainable Agriculture 2006 and Beyond, 171–74. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6635-1_25.

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Nardini, Andrea, Tadeja Savi, Patrizia Trifilò, and Maria A. Lo Gullo. "Drought Stress and the Recovery from Xylem Embolism in Woody Plants." In Progress in Botany Vol. 79, 197–231. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/124_2017_11.

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Chapman, Cathryn, and Bingru Huang. "Physiological, Biochemical and Molecular Mechanisms Regulating Post-Drought Stress Recovery in Grass Species." In Handbook of Plant and Crop Stress, Fourth Edition, 41–49. Fourth edition. | Boca Raton, FL : CRC Press, Taylor & Francis Group, 2019.: CRC Press, 2019. http://dx.doi.org/10.1201/9781351104609-3.

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Yagci, Ali Levent, Joseph A. Santanello, Matthew Rodell, Meixia Deng, and Liping Di. "Detecting the 2012 Drought in the Southeastern United States with Moderate Resolution Imaging Spectroradiometer- and Gravity Recovery and Climate Experiment-Based Drought Indicators *." In Remote Sensing of Hydrometeorological Hazards, 85–101. Boca Raton, FL : Taylor & Francis, 2018.: CRC Press, 2017. http://dx.doi.org/10.1201/9781315154947-5.

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"Famine, Drought and Recovery: 1959–62." In Zhou Enlai. I.B. Tauris, 2019. http://dx.doi.org/10.5040/9781788319270.ch-020.

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McLean, Ian W. "Depression, Drought, and Federation." In Why Australia Prospered. Princeton University Press, 2012. http://dx.doi.org/10.23943/princeton/9780691154671.003.0006.

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This chapter talks about negative shocks from internal imbalance, external factors, and drought wrought havoc with the economy for more than a decade. Against this background of a major threat to prosperity, important changes occurred in the institutional framework with the federation of the Australian colonies in 1901. Though some recovery in economic fortunes occurred before the outbreak of war, it was short-lived. Per capita real GDP fell by 22 percent by 1895 and did not regain its 1889 peak for a full two decades. The approach adopted here includes a comparative perspective on Australians' reduced levels of prosperity between 1890 and 1914. Australia recorded the highest per capita income in the world for some period prior to the 1890s. The chapter shows how this achievement has never been repeated.
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Milne, Bruce T., and Douglas I. Moore. "Multidecadal Drought Cycles in South-Central New Mexico: Patterns and Consequences." In Climate Variability and Ecosystem Response in Long-Term Ecological Research Sites. Oxford University Press, 2003. http://dx.doi.org/10.1093/oso/9780195150599.003.0027.

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Extreme, regional droughts are the most common form of disturbance in semiarid ecosystems typified by relatively slow recovery rates. Drought-driven impacts can include regionally synchronized insect outbreaks, wildfires, and tree mortality (Swetnam and Betancourt 1990), as well as disastrous failures of agriculture, silviculture, and livestock production (Mainguet 1994). Drought conditions, accompanied by anthropogenic land mismanagement, have led to subsequent invasions of grasslands and farmlands by woody shrubs and nonnative forbs and grasses, contributing to the modern “desertification” process manifested in many parts of the world (Archer et al. 1988). In the American Southwest, the drought of the 1950s was one of the most severe climate events of the past millennium because of wide ramifications for the region’s ecology (Herbel et al. 1972; Swetnam and Betancourt 1998), water resources (Thomas 1963), and economy (Regensberg 1996). As human population and resource needs increase in the Southwest, so will the economic sensitivity to largescale drought. A clear understanding of extreme droughts is necessary not only to understand long-term ecosystem dynamics, but also to mitigate socioeconomic impacts. The goals of this chapter are to use the Sevilleta LTER site in central New Mexico to (1) quantify the decadal variability in precipitation inferred from a 394-year record of tree rings, (2) relate the repeated decadal fluctuations in precipitation to major droughts of the 1890s and 1950s, (3) assess the ecological responses associated with droughts of the last century, and (4) elucidate the biotic-atmospheric feed backs that may influence future responses. We assess the magnitude, timing, and consequences of decadal fluctuations in annual precipitation. The Sevilleta LTER research site is located at the Sevilleta National Wildlife Refuge (NWR), Socorro County, New Mexico (34º20' N, 106º50' W). The Sevilleta NWR comprises 100,000 ha of grassland, desert, and woodland bordered by two mountain ranges and the Rio Grande Valley in between. Elevations range from 1,350 m at the Rio Grande to 2,797 m at Ladrón Peak in the northwestern portion of the refuge. Topography, geology, soils, and hydrology, interacting with major air mass dynamics, provide a spatial and temporal template that makes the region a transition zone between several biomes. The region contains communities that both represent and intersect Great Plains Grassland, Great Basin Shrub-steppe, Chihuahuan Desert, Interior Chaparral, and Montane Coniferous Forest (Brown 1982).
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"Community Ecology of Stream Fishes: Concepts, Approaches, and Techniques." In Community Ecology of Stream Fishes: Concepts, Approaches, and Techniques, edited by Edie Marsh-Matthews and William J. Matthews. American Fisheries Society, 2010. http://dx.doi.org/10.47886/9781934874141.ch23.

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<em>Abstract</em>.—Using artificial stream mesocosms, we conducted two experiments in consecutive summers to examine proximate and residual effects of simulated drought on survivorship, body size, condition, and reproduction of fishes common in southern Oklahoma streams. In summer 2000, we examined proximate effects on central stonerollers <em>Campostoma anomalum</em>, bigeye shiners <em>Notropis boops</em>, black-stripe topminnow <em>Fundulus notatus</em>, longear sunfish <em>Lepomis megalotis</em>, and orange-throat darters <em>Etheostoma spectabile </em>exposed to either continuous flow or to simulated drought for 40 d. Survivorship did not differ between treatments for central stonerollers, bigeye shiners, or orangethroat darters, but was lower in the drought treatment for both blackstripe topminnow and longear sunfish. Body size of survivors in the drought treatment tended to be smaller for central stonerollers. Condition of bigeye shiner and central stoneroller individuals was lower in the drought treatment, and bigeye shiner females exposed to drought were less likely to have mature eggs. In summer 2001, we simulated drought for 35 d and examined residual effects on central stonerollers, bigeye shiners, and orangethroat darters approximately 6 months later. Survivorship assayed in spring 2002 was marginally lower for orangethroat darters. Body size of central stonerollers in the drought treatment was smaller, consistent with proximate effects of drought on body size. Bigeye shiners did not differ between treatments in either body size or condition, indicating no residual effect of drought on fat stores despite much lower condition immediately following drought in summer 2000. For orangethroat darters, individuals exposed to drought tended to be larger and in better condition and to have more mature gonads than individuals in the flow treatment after the recovery period. The results of our two experiments demonstrate that drought affects survival, growth, body condition, and reproduction in different ways for different species, and proximate effects do not necessarily predict residual effects on fishes that survive drought.
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The United Nations Accountability Project—Somalia. "Neither Inevitable nor Accidental." In War and Peace in Somalia, 41–48. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190947910.003.0002.

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The lack of inclusion in Somali society has a profound effect on the vulnerability of certain groups. According to the UN Somalia Accountability Project, certain groups, especially the Rahanweyn clan and Bantu Somalis, were severely, and disproportionately, affected by the droughts of 1991–1992 and 2011–2012. It is highly likely that they have also borne the brunt of the 2016–2017 drought. This chapter argues for the importance of understanding the political economy of protection and its failures. It calls for humanitarian, recovery, and stabilization activities to take proper account of forces that marginalize certain groups and action to avoid exacerbating such vulnerabilities. The complexities of grievances in Somalia mean that exclusion must be addressed if genuine peace and reconciliation are to be achieved.
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Conference papers on the topic "Drought recovery"

1

Blanco, Andres A., and Gabriel A. Rincon-Mora. "Energy-harvesting microsensors: Low-energy task schedule & fast drought-recovery design." In 2016 IEEE 59th International Midwest Symposium on Circuits and Systems (MWSCAS). IEEE, 2016. http://dx.doi.org/10.1109/mwscas.2016.7869964.

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ogden, aaron. "Phloem Exudate Protein Profiles during Drought and Recovery Reveal Abiotic Stress Responses in Tomato Vasculature." In ASPB PLANT BIOLOGY 2020. USA: ASPB, 2020. http://dx.doi.org/10.46678/pb.20.1382420.

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"An integrated surface water, groundwater and wetland plant model of drought response and recovery for environmental water management." In 19th International Congress on Modelling and Simulation. Modelling and Simulation Society of Australia and New Zealand (MSSANZ), Inc., 2011. http://dx.doi.org/10.36334/modsim.2011.e15.driver.

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Nourse, Jonathan A., and Danny Miranda. "RUNOFF AND SPRING DISCHARGE MEASUREMENTS RECORD WATERSHED RECOVERY FROM A FIVE-YEAR DROUGHT IN ICEHOUSE CANYON, SAN GABRIEL MOUNTAINS, CALIFORNIA." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-307142.

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Bruninga, Bill. "Turbine Improvements at Hoover Dam." In ASME 2010 Power Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/power2010-27124.

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The Bureau of Reclamation is using advanced mechanical engineering design and project management techniques to regain power plant capacity lost as a result of drought-related low water levels at 2,074-MW Hoover Dam. Work includes mechanical modifications in 11 hydro turbine-generator units to increase flow rates as well as overhauling all 17 turbines. The mechanical modifications to date have recovered 84 MW with an annual value of $2.7 million. Additional power produced by the 11 units overhauled to date equates to nearly $3.2 million a year. In addition to advanced mechanical design and stainless steel fabrication based on computational fluid dynamics, this project is noted for tightly coordinated procurement and installation project management within an existing O&M program at an aging operational power plant.
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Lakeh, Reza Baghaei, Daniel Andrade, Kyle Miller, Mohammad Masoud Modabernia, Thuan John Nguyen, Justine Nguyen, Elbon Flanagan, et al. "Design and Testing of a Solar-Driven Wastewater Treatment Unit for Off-Grid Applications." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87090.

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The decline of surface water sources along with periodic droughts has introduced new challenges for the state of California. In order to keep up with the increasing demand for water, the state is heavily relying on imported water from the north to Southern California as well as importing water from the Colorado River. The imported water has a large carbon footprint due to using grid power for water transport. Water reuse (reclaimed) is considered as one of the solutions to reduce the dependency of state on imported water. The research team at Cal Poly Pomona, is developing an off-grid solar-powered greywater treatment system for non-potable use in single households. Greywater is the drained water from bathroom sinks, showers, tubs, and washing machines; not including wastewater from toilets or kitchen sinks. Treating greywater on-site can provide significant water savings, and can reduce the carbon footprint of desalination using solar panels. The developed system is comprised of a three-stage treatment train: micro-filtration, solar-driven reverse osmosis, and ultraviolet disinfection. The end product of the project is capable of reclaiming 90–100 gallons of water per day which is about 60% of residential greywater waste. The system removes large suspended particles (particles of dirt, food, etc.) as well as organic and inorganic dissolved contaminants. It is demonstrated that the system can provide a permeate quality that agrees with recommended guidelines for reclaimed water. The system has a recovery rate of up to 62%.
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Reports on the topic "Drought recovery"

1

Ahmadi, Behzad. On the Drought Recovery and Resiliency: How Terrestrial and Riverine Ecosystems Recover from Agricultural and Hydrological Droughts. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.6710.

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Caribbean Drought Workshop Impacts, Resilience, and Recovery. USDA Caribbean Climate Hub, May 2018. http://dx.doi.org/10.32747/2018.6943417.ch.

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This workshop was held in collaboration with the Southeast Climate Adaptation Science Center, North Carolina State University, the Integration & Application Network from the University of Maryland Center for Environmental Science, and the USDA Caribbean Climate Hub. This report was made possible by support from NRCS Caribbean.
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