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Artigos de revistas sobre o tema "Ecozones"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 20 de fevereiro de 2023

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1

Le, Ba Huy. "ECOZONING FOR THE AQUATIC PRODUCTION IN 8 COSTAL ZONE PROVINCES OF MEKONG DELTA." Science and Technology Development Journal 13, no. 1 (March 30, 2010): 35–47. http://dx.doi.org/10.32508/stdj.v13i1.2079.

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Planning for the aquatic production needs the suitable Eco-planning. Such eco-should come from research results of GIS, RS method and direct survey of land use, soil characteristics, water flood level, salinity, acidity, topography, trial, social characteristic. The research on ecozoning for Mekong Delta show that within 8 costal provinces there are many Ecozone which include: Province Sóc trăng: 5 Eco-zones, Bac Lieu: 6 ecozones, Cà Mau: 8 Ecozones ; Kiên Giang: 7 Ecozones, Long An: 5 Ecozones, Tiền Giang: 7 Ecozones, Bến Tre: 6 Ecozones and̀ Trà Vinh: 6 Ecozones. The research also provide

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2

Hamid, Mohamed E., Adil Mahgoub, Abdulrhman J. O. Babiker, Hussein A. E. Babiker, Mohammed A. I. Holie, Mogahid M. Elhassan, and Martin R. P. Joseph. "Isolation and Identification of Streptomyces spp. from Desert and Savanna Soils in Sudan." International Journal of Environmental Research and Public Health 17, no. 23 (November 25, 2020): 8749. http://dx.doi.org/10.3390/ijerph17238749.

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The purpose of this study was to investigate streptomycete populations in desert and savanna ecozones in Sudan and to identify species based on 16S rRNA gene sequences. A total of 49 different Streptomyces phenotypes (22 from sites representing the desert and semi-desert ecozone; 27 representing the savanna ecozone) have been included in the study. The isolates were characterized phenotypically and confirmed using 16S rRNA gene sequence analysis. The two ecozones showed both similarities and uniqueness in the types of isolates. The shared species were in cluster 1 (Streptomyces (S.) werraensis

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3

Hulley, Mike, Colin Clarke, and Ed Watt. "Occurrence and magnitude of low flows for Canadian rivers: an ecozone approach." Canadian Journal of Civil Engineering 41, no. 1 (January 2014): 1–8. http://dx.doi.org/10.1139/cjce-2013-0300.

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Low-flow occurrence and magnitude have been documented for Canada using the National Ecological Framework. The low flow database is composed of the 7-day low flow with 2-year return period (7Q2) values for 453 natural flow hydrometric stations with record lengths of at least 30 years; drainage areas ranged from 10 to 30 000 km2. Occurrence zones corresponding to predominant season for annual low flows are associated with ecozones. The ecozone scale was found to be suitable for regional analysis for several ecozones. For some ecozones there were insufficient data for regional analysis and for o

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4

Parisien, Marc-André, Vernon S. Peters, Yonghe Wang, John M. Little, Erin M. Bosch, and Brian J. Stocks. "Spatial patterns of forest fires in Canada, 1980 - 1999." International Journal of Wildland Fire 15, no. 3 (2006): 361. http://dx.doi.org/10.1071/wf06009.

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The present study characterized the spatial patterns of forest fires in 10 fire-dominated ecozones of Canada by using a database of mapped fires ≥200 ha from 1980 to 1999 (n = 5533 fires). Spatial metrics were used individually to compare measures of fire size, shape (eccentricity and complexity), clustering, and geographic orientation among ecozones and were used concurrently in a multivariate analysis. In addition, a set of factors that influence the fire regime at the ecozone level – topography, climate, fuels, and anthropogenic factors – was compared with the metric outputs. We found signi

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5

Dai, Mulan, Luke D. Bainard, Chantal Hamel, Yantai Gan, and Derek Lynch. "Impact of Land Use on Arbuscular Mycorrhizal Fungal Communities in Rural Canada." Applied and Environmental Microbiology 79, no. 21 (August 30, 2013): 6719–29. http://dx.doi.org/10.1128/aem.01333-13.

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ABSTRACTThe influence of land use on soil bio-resources is largely unknown. We examined the communities of arbuscular mycorrhizal (AM) fungi in wheat-growing cropland, natural areas, and seminatural areas along roads. We sampled the Canadian prairie extensively (317 sites) and sampled 20 sites in the Atlantic maritime ecozone for comparison. The proportions of the different AM fungal taxa in the communities found at these sites varied with land use type and ecozones, based on pyrosequencing of 18S rRNA gene (rDNA) amplicons, but the lists of AM fungal taxa obtained from the different land use

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6

Bernau, Vivian M., Lev Jardón Barbolla, Leah K. McHale, and Kristin L. Mercer. "Germination response of diverse wild and landrace chile peppers (Capsicum spp.) under drought stress simulated with polyethylene glycol." PLOS ONE 15, no. 11 (November 16, 2020): e0236001. http://dx.doi.org/10.1371/journal.pone.0236001.

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Responses to drought within a single species may vary based on plant developmental stage, drought severity, and the avoidance or tolerance mechanisms employed. Early drought stress can restrict emergence and seedling growth. Thus, in areas where water availability is limited, rapid germination leading to early plant establishment may be beneficial. Alternatively, germination without sufficient water to support the seedling may lead to early senescence, so reduced germination under low moisture conditions may be adaptive at the level of the population. We studied the germination response to osm

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ΣΙΝΕΚΟΓΛΟΥ, Α., Α. ΜΑΡΚΟΠΟΥΛΟΥ-ΔΙΑΚΑΝΤΩΝΗ, and Ο. DRAGASTAN. "The contribution of the ecozones to the ecostratigraphy. As an example the Plio - Pleistocene basin of Magoula- Karatoulas (Ilia, NE Peloponnesos)." Bulletin of the Geological Society of Greece 34, no. 2 (August 1, 2018): 593. http://dx.doi.org/10.12681/bgsg.17107.

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In this paper is marked the contribution of the Ecozones to the Ecostratigraphy. As an example we use the drillings (Ml, M2, M3, M4, M6, MIO) coming from the Plio- Pleistocene basin of the Magoula- Karatoulas (Pyrgos, Peloponnesus). Based on the detailed stratigraphical and paleoecological studies of the postalpine sediments (VAGIAS et al. 1995) of the formation of Vounargo (HAGEMAN 1977,1979 & ΚΑΜΠΕΡΗΣ 1987) we attempt to define 15 ecozones, as it is understood the layer or the whole of the layers, which is characterized by an association of fossils (at the level of species, genus or fami

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8

Denysyk, Hryhoriy I., Oksana M. Valchuk-Orkusha, Viktoriia V. Kanska, Volodymyr S. Kanskyi, and Iryna P. Kozynska. "Ecozones of road landscape-engineer systems: structure, typology, significance." Journal of Geology, Geography and Geoecology 31, no. 4 (January 8, 2023): 591–600. http://dx.doi.org/10.15421/112255.

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   We analyzed one of the inseparable components of road landscapes of Ukraine, their ecozones. As noted, road landscapes are divided into three categories: road landscape-en- gineer systems (RLESs), road landscape-technogenic systems (RLTSs) and road landscapes proper (RLP). Depending on those categories of road landscapes, there form respective road ecozones. Most distinctively, they become structured and developed over the process of constructing and functioning of RLESs. Therefore, the objectives of our research were the structure, typology, properties and significance of

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9

Jiang, Yueyang, Qianlai Zhuang, Mike D. Flannigan, and John M. Little. "Characterization of wildfire regimes in Canadian boreal terrestrial ecosystems." International Journal of Wildland Fire 18, no. 8 (2009): 992. http://dx.doi.org/10.1071/wf08096.

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Wildfire is a major disturbance in boreal terrestrial ecosystems. Characterizing fire regimes and projecting fire recurrence intervals for different biomes are important in managing those ecosystems and quantifying carbon dynamics of those ecosystems. This study used Canadian wildfire datasets, 1980–1999, to characterize relationships between number of fires and burned area for 13 ecozones and to calculate wildfire recurrence intervals in each ecozone. For the study period, wildfires were found to follow power–law relationships between frequency densities (number of fires normalized to unit bi

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García-Montero, Luis G., Cristina Pascual, Alfonso Sanchez-Paus Díaz, Susana Martín-Fernández, Pablo Martín-Ortega, Fernando García-Robredo, Carlos Calderón-Guerrero, Chiara Patriarca, and Danilo Mollicone. "Land Use Sustainability Monitoring: “Trees Outside Forests” in Temperate FAO-Ecozones (Oceanic, Continental, and Mediterranean) in Europe (2000–2015)." Sustainability 13, no. 18 (September 11, 2021): 10175. http://dx.doi.org/10.3390/su131810175.

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The global distribution of forest trees is essential for monitoring land-use sustainability. For this reason, FAO developed the Global Forest Survey (GFS), a systematic regional level survey with a homogeneous sampling design. Preliminary results revealed an interest in analyzing “Trees Outside Forests” (TOFs). We analyzed more than 11,150 sample GFS plots in temperate FAO-ecozones in Europe through a photo-interpretation approach using FAO’s Collect Earth platform. Our results showed that forest land was the most predominant use of land (41%) in temperate FAO-ecozones in Europe in 2015. Fores

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11

Bremond, Laurent, Christopher Carcaillet, Charly Favier, Adam A. Ali, Cédric Paitre, Yves Bégin, Yves Bergeron, and Pierre J. H. Richard. "Effects of vegetation zones and climatic changes on fire-induced atmospheric carbon emissions: a model based on paleodata." International Journal of Wildland Fire 19, no. 8 (2010): 1015. http://dx.doi.org/10.1071/wf09096.

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An original method is proposed for estimating past carbon emissions from fires in order to understand long-term changes in the biomass burning that, together with vegetation cover, act on the global carbon cycle and climate. The past carbon release resulting from paleo-fires during the Holocene is examined using a simple linear model between measured carbon emissions from modern fires and sedimentary charcoal records of biomass burning within boreal and cold temperate forests in eastern Canada (Quebec, Ontario). Direct carbon emissions are estimated for each ecozone for the present period and

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12

Asong, Z. E., S. Razavi, H. S. Wheater, and J. S. Wong. "Evaluation of Integrated Multisatellite Retrievals for GPM (IMERG) over Southern Canada against Ground Precipitation Observations: A Preliminary Assessment." Journal of Hydrometeorology 18, no. 4 (March 27, 2017): 1033–50. http://dx.doi.org/10.1175/jhm-d-16-0187.1.

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Abstract The Global Precipitation Measurement (GPM) mission offers new opportunities for modeling a range of physical/hydrological processes at higher resolutions, especially for remote river systems where the hydrometeorological monitoring network is sparse and weather radar is not readily available. In this study, the recently released Integrated Multisatellite Retrievals for GPM [version 03 (V03) IMERG Final Run] product with high spatiotemporal resolution of 0.1° and 30 min is evaluated against ground-based reference measurements (at the 6-hourly, daily, and monthly time scales) over diffe

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13

Kihara, Job, F. Kizito, M. Jumbo, M. Kinyua, and M. Bekunda. "Unlocking maize crop productivity through improved management practices in northern Tanzania." African Journal of Food, Agriculture, Nutrition and Development 20, no. 07 (December 18, 2020): 17095–112. http://dx.doi.org/10.18697/ajfand.95.17965.

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Addressing the problem of low crop productivity and food insecurity can be accelerated through community-centered implementation of good agricultural management practices. This study was conducted in Babati,Northern Tanzania. The objective of the study was to determine nitrogen (N)and phosphorus (P)application requirements for maize,and demonstrate economically viable best bet yield-improving management technologies under three ecozones namely; ‘low elevation low rainfall’, ‘medium elevation high rainfall’ and ‘medium elevation low rainfall’ ecozone. Two sets of trials were conducted: N (0, 45

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14

Thomas Ambadan, Jaison, Matilda Oja, Ze’ev Gedalof, and Aaron A. Berg. "Satellite-Observed Soil Moisture as an Indicator of Wildfire Risk." Remote Sensing 12, no. 10 (May 12, 2020): 1543. http://dx.doi.org/10.3390/rs12101543.

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Wildfires are a concerning issue in Canada due to their immediate impact on people’s lives, local economy, climate, and environment. Studies have shown that the number of wildfires and affected areas in Canada has increased during recent decades and is a result of a warming and drying climate. Therefore, identifying potential wildfire risk areas is increasingly an important aspect of wildfire management. The purpose of this study is to investigate if remotely sensed soil moisture products from the Soil Moisture and Ocean Salinity (SMOS) satellite can be used to identify potential wildfire risk

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15

Alix, Hugo, Gaëtan F. Tremblay, Martin H. Chantigny, Gilles Bélanger, Philippe Seguin, Keith D. Fuller, Shabtai Bittman, et al. "Forage yield, nutritive value, and ensilability of sweet pearl millet and sweet sorghum in five Canadian ecozones." Canadian Journal of Plant Science 99, no. 5 (October 1, 2019): 701–14. http://dx.doi.org/10.1139/cjps-2019-0031.

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Sweet pearl millet [Pennisetum glaucum (L.) R. Br.] and sweet sorghum [Sorghum bicolor (L.) Moench], previously tested for ethanol production, were evaluated as high sugar crops for animal feeds to possibly replace silage corn (Zea mays L.). We compared the forage yield, nutritive value, and ensilability of one hybrid of sweet pearl millet and two of sweet sorghum to a locally adapted silage corn hybrid in five Canadian ecozones. Forage yields of sweet pearl millet and sorghum were similar to that of silage corn in the Boreal Shield, Mixedwood Plain, and Atlantic Maritime ecozones, greater in

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16

González Sánchez, Patricia María, Otávio Luis Marques da Silva, Rubén Cabrera, Beatriz Martínez Daranas, Enrique Reynaldo de la Cruz, Valéria Cassano, and Mutue Toyota Fujii. "Similarity and areas of endemism of the Laurencia complex (Ceramiales, Rhodomelaceae) in Cuba." Anales de Biología, no. 44 (July 4, 2022): 55–70. http://dx.doi.org/10.6018/analesbio.44.06.

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Las especies del complejo Laurencia son elementos importantes en la estructura y diversidad de los ecosistemas costeros. Por primera vez, se analiza la distribución geográfica del complejo dentro de la plataforma cubana, sus áreas marinas protegidas y se identifican áreas potenciales endémicas, considerando las ecozonas en que se dividió la plataforma. A la fecha, se han inventariado 19 especies, de estas 10 pertenecen a Laurencia, una a Osmundea, cinco a Palisada, dos a Yuzurua, y se incorporó Laurenciella como nuevo género para Cuba. La distribución fue desigual, con un alto número de especi

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Clair, Thomas A., James Ehrman, and Kaz Higuchi. "Changes to the runoff of Canadian ecozones under a doubled CO2 atmosphere." Canadian Journal of Fisheries and Aquatic Sciences 55, no. 11 (November 1, 1998): 2464–77. http://dx.doi.org/10.1139/f98-129.

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Increases in atmospheric greenhouse gases may change the hydrology of a number of Canada's regions. This will have an impact on aquatic and wetland ecosystems as well as municipal, industrial, and power generation uses. It is thus important to get an estimate of the potential changes to the Canadian hydrological cycle in order to make intelligent decisions concerning mitigation factors that society may be forced to undertake. We divided Canada into ecoclimatologically similar regions called "ecozones." We developed two month-stepped temperature-precipitation-runoff models for the country using

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Amiro, B. D., A. Cantin, M. D. Flannigan, and W. J. de Groot. "Future emissions from Canadian boreal forest fires." Canadian Journal of Forest Research 39, no. 2 (February 2009): 383–95. http://dx.doi.org/10.1139/x08-154.

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New estimates of greenhouse gas emissions from Canadian forest fires were calculated based on a revised model for fuel consumption, using both the fire fuel load and the Drought Code of the Canadian Forest Fire Weather Index System. This model was applied to future climate scenarios of 2×CO2 and 3×CO2 environments using the Canadian Global Climate Model. Total forest floor fuel consumption for six boreal ecozones was estimated at 60, 80, and 117 Tg dry biomass for the 1×CO2, 2×CO2, and 3×CO2 scenarios, respectively. These ecozones cover the boreal and taiga regions and account for about 86% of

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Amiro, B. D., J. B. Todd, B. M. Wotton, K. A. Logan, M. D. Flannigan, B. J. Stocks, J. A. Mason, D. L. Martell, and K. G. Hirsch. "Direct carbon emissions from Canadian forest fires, 1959-1999." Canadian Journal of Forest Research 31, no. 3 (March 1, 2001): 512–25. http://dx.doi.org/10.1139/x00-197.

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Direct emissions of carbon from Canadian forest fires were estimated for all Canada and for each ecozone for the period 19591999. The estimates were based on a data base of large fires for the country and calculations of fuel consumption for each fire using the Canadian Forest Fire Behaviour Prediction System. This technique used the fire locations and start dates to estimate prevailing fire weather and fuel type for each of about 11 000 fires. An average of 2 × 106 ha·year1 was burned in this period, varying from 0.3 × 106 ha in 1978 to 7.5 × 106 ha in 1989. Ecozones of the boreal and taiga

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Fang, Xing, and John W. Pomeroy. "Diagnosis of future changes in hydrology for a Canadian Rockies headwater basin." Hydrology and Earth System Sciences 24, no. 5 (May 28, 2020): 2731–54. http://dx.doi.org/10.5194/hess-24-2731-2020.

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Abstract. Climate change is anticipated to impact the hydrology of the Saskatchewan River, which originates in the Canadian Rockies mountain range. To better understand the climate change impacts in the mountain headwaters of this basin, a physically based hydrological model was developed for this basin using the Cold Regions Hydrological Modelling platform (CRHM) for Marmot Creek Research Basin (∼9.4 km2), located in the Front Ranges of the Canadian Rockies. Marmot Creek is composed of ecozones ranging from montane forests to alpine tundra and alpine exposed rock and includes both large and s

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Afanasieva, M. S. "Devonian Radiolarian Ecozones of Northern Eurasia." Paleontological Journal 54, no. 9 (December 2020): 947–1093. http://dx.doi.org/10.1134/s0031030120090014.

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Coogan, Sean C. P., Xinli Cai, Piyush Jain, and Mike D. Flannigan. "Seasonality and trends in human- and lightning-caused wildfires ≥ 2 ha in Canada, 1959–2018." International Journal of Wildland Fire 29, no. 6 (2020): 473. http://dx.doi.org/10.1071/wf19129.

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We examined the seasonal distribution of lightning- and human-caused wildfires ≥ 2ha in Canada for two time periods: 1959–2018 and 1981–2018. Furthermore, we investigated trends in seasonality, number of fires per year and number of days with fire starts per year for human- and lightning-caused fires. Nationally, lightning fires peaked from June to August, whereas human fires peaked during May. There was, however, notable variation in the seasonal distributions of human- and lightning-caused fires between ecozones. Likewise, trends in season start and end dates varied among ecozones and time s

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Klos, Ryan J., G. Geoff Wang, Qing-Lai Dang, and Ed W. East. "Taper Equations for Five Major Commercial Tree Species in Manitoba, Canada." Western Journal of Applied Forestry 22, no. 3 (July 1, 2007): 163–70. http://dx.doi.org/10.1093/wjaf/22.3.163.

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Abstract Kozak's variable exponent taper equation was fitted for balsam poplar (Populus balsamifera L.), trembling aspen (Populus tremuloides Michx.), white spruce (Picea glauca [Moench] Voss), black spruce (Picea mariana [Mill.] B.S.P.), and jack pine (Pinus banksiana Lamb.) in Manitoba. Stem taper variability between two ecozones (i.e., Boreal Shield and Boreal Plains) were tested using the F-test. Regional differences were observed for trembling aspen, white spruce, and jack pine, and for those species, separate ecozone-specific taper equations were developed. However, the gross total volum

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Baafi, Ernest, Mavis Akom, Adelaide Agyeman, Cynthia Darko, and Ted Carey. "Breeding farmer and consumer preferred sweetpotatoes using accelerated breeding scheme and mother–baby trials." Open Agriculture 5, no. 1 (September 21, 2020): 548–57. http://dx.doi.org/10.1515/opag-2020-0055.

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AbstractIncreased sweetpotato utilization has become an important breeding objective recently, with much emphasis on the development of non-sweet sweetpotatoes for income and food security in Ghana. The objective of this study was to evaluate 26 elite non-sweet and less sweet sweetpotato genotypes with regard to their release as commercial varieties using mother–baby trial. The 26 sweetpotato genotypes were tested multilocational on-farm across five ecozones from 2016 to 2017. These genotypes were selected from accelerated breeding scheme carried out from 2010 to 2013. There were no year-by-ec

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Triantaphyllou, M. V., A. Antonarakou, K. Kouli, M. Dimiza, G. Kontakiotis, P. Ziveri, G. Mortyn, V. Lykousis, and M. D. Dermitzakis. "PLANKTON ECOSTRATIGRAPHY AND POLLEN ASSEMBLAGE ZONES OVER THE LAST 14 000 YEARS IN SE AEGEAN SEA (CORE NS-14)." Bulletin of the Geological Society of Greece 40, no. 1 (June 8, 2018): 209. http://dx.doi.org/10.12681/bgsg.16515.

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A quantitative analysis of coccolithophores, planktonic foraminifera and pollen assemblages was carried out on core NS-14 (SE Aegean Sea), recovered in the Western Kos Basin. Eleven coccolithophore (ACE 1-11) and ten planktonic foraminifera (APFE1-10) ecozones have been recognized during the last 14 000 yrs using calcareous nannofossil and planktonic foraminifera abundances. Additionally eight pollen assemblage zones (PAZ 1-8) have been recognised. The established high resolution ecozonal scheme allows a detailed paleoecological reconstruction for the Holocene archive in the SE Aegean Sea, def

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Mitchell, A. K., and C. Lee. "The Forest Ecosystem Research Network of Sites (FERNS)." Forestry Chronicle 75, no. 3 (June 1, 1999): 481–82. http://dx.doi.org/10.5558/tfc75481-3.

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The Canadian Forest Service (CFS) has organized a National Forest Ecosystem Research Network of Sites (FERNS). These sites are focussed on the study of sustainable forest management practices and ecosystem processes at the stand level. Network objectives are to promote this research nationally and internationally, provide linkages among sites, preserve the long-term research investments already made on these sites and provide a forum for information exchange and data sharing. The 17 individual sites are representative of six ecozones across Canada and address the common issue of silvicultural

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Batal, Malek, Hing Man Chan, Karen Fediuk, Amy Ing, Peter Berti, Tonio Sadik, and Louise Johnson-Down. "Importance of the traditional food systems for First Nations adults living on reserves in Canada." Canadian Journal of Public Health 112, S1 (June 2021): 20–28. http://dx.doi.org/10.17269/s41997-020-00353-y.

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Abstract Objective To describe the traditional food (TF) systems of First Nations in Canada, including intake, barriers and promoters. Methods The First Nations Food, Nutrition and Environment Study is a cross-Canada participatory study of First Nations adults below the 60th parallel that obtained data for communities excluded from other national studies. A food frequency questionnaire was used to establish frequency of TF intake (number of days in a year) to allow comparisons across ecozones/regions in Canada. Grams of TF intake were also calculated using frequency multiplied by average porti

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Zimmer, V. "Konversion der US-Stützpunkte auf den Philipinen : Kompensationsstrategien in militärdominierten Regionalökonomien." Geographica Helvetica 59, no. 1 (March 31, 2004): 20–29. http://dx.doi.org/10.5194/gh-59-20-2004.

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Abstract. Der sehr kurzfristige Abzug der US-Streitkräfte im Jahr 1992 versetzte die Philippinen in die Situation, den Verlust von rund 14.000 Arbeitsplätzen für einheimische Beschäftigte und ein Ausgabevolumen der US-Armee von jährlich mehr als 700 Mio. US$ kompensieren zu müssen. Die gut ausgebaute Infrastruktur der verlassenen US-Stützpunkte sowie die Finanzierung über einen revolvierenden Fonds, dessen Erlöse sich aus der Entwicklung und dem Verkauf großer Militärareale der philippinischen Streitkräfte in der Hauptstadtregion generieren, haben einen zügigen Beginn der Liegenschaftskonversi

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Breivik, Heidi M., and Martin Callanan. "Hunting High and Low: Postglacial Colonization Strategies in Central Norway between 9500 and 8000 cal BC." European Journal of Archaeology 19, no. 4 (2016): 571–95. http://dx.doi.org/10.1080/14619571.2016.1147315.

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In this article, we examine aspects of the Postglacial colonization processes that took place in central Norway during the Early Mesolithic (c. 9500–8000 cal bc). The distribution of sites from this period shows that the colonizers approached and exploited two very different landscapes and resource situations—from archipelagic to alpine. Based on twelve artefact assemblages from central Norway we investigate how colonizing populations met the challenge posed by varying ecozones. Did they organize their settlements and technologies in similar ways or did they modify sites and activities in rela

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Erb, John, Nils Chr Stenseth, and Mark S. Boyce. "Geographic variation in population cycles of Canadian muskrats (Ondatra zibethicus)." Canadian Journal of Zoology 78, no. 6 (June 1, 2000): 1009–16. http://dx.doi.org/10.1139/z00-027.

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We investigated the dynamic properties of population cycles in Canadian muskrats (Ondatra zibethicus). Ninety-one historic time series of muskrat-harvest data obtained from the Hudson's Bay Company Archives were analyzed. Most series were 25 years in length (19251949) and were distributed primarily throughout five ecozones. For each series, we estimated period length and coefficients for a second-order autoregressive model. Estimated period length varied between 3 and 13 years, with 3- to 5-year periods located in Subarctic-Arctic ecozones. We hypothesize that the 4-year cycles are largely a

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Beniamovski, Vladimir N. "Paleocene benthic foraminiferal ecozones of the northern Peri-Tethys." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 234, no. 1-3 (December 22, 2004): 183–99. http://dx.doi.org/10.1127/njgpa/234/2004/183.

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Molot, L. A., W. Keller, P. R. Leavitt, R. D. Robarts, M. J. Waiser, M. T. Arts, T. A. Clair, et al. "Risk analysis of dissolved organic matter-mediated ultraviolet B exposure in Canadian inland waters." Canadian Journal of Fisheries and Aquatic Sciences 61, no. 12 (December 1, 2004): 2511–21. http://dx.doi.org/10.1139/f04-165.

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With depleted ozone levels and the possibility that climate change might lower dissolved organic matter (DOM) concentrations, the risk of exposure of fresh waters in Canada to ultraviolet B (UV-B) was evaluated. First, the distribution of a UV-B-sensitive zooplankton genus, Daphnia, was examined as a function of DOM concentration and maximum depth (Zmax) in 258 systems. Distribution was not restricted by UV-B, although very clear, shallow systems are underrepresented. Secondly, the depth at which 1% of surface radiance at 320 nm occurs (Z320,1%) was compared with Zmax in over 1000 aquatic syst

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Titova, Lyubov’, Abdulmonem Hassan, Ivan Mikhailov, Elena Rodionova, Sergei Rasskazov, and Мarina Usoltseva. "Diversity and Ecology of Diatoms in Pliocene Deposits of the Tunka Valley (Baikal Rift Zone)." Diversity 13, no. 10 (September 29, 2021): 479. http://dx.doi.org/10.3390/d13100479.

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Fossil diatoms are an excellent tool for reconstructing the palaeoenvironmental and palaeogeographic changes involving lacustrine systems. In this work, the diatom content of Pliocene sediments recovered from a core extracted in the Tunka Basin (Baikal Rift Zone, Russia) is described. Revealed by light and scanning electron microscopy, 170 species of diatoms were found. Benthic, alkaliphilic, indifferent, cosmopolitan, and oligosaprobe species predominated. Ecological, geographical, and stratigraphic analysis of diatoms showed two ecozones, differing in taxonomic diversity of species. From the

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Kefena, E., T. Dessie, J. L. Han, M. Y. Kurtu, S. Rosenbom, and A. Beja-Pereira. "Morphological diversities and ecozones of Ethiopian horse populations." Animal Genetic Resources/Ressources génétiques animales/Recursos genéticos animales 50 (June 2012): 1–12. http://dx.doi.org/10.1017/s2078633612000021.

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Amiro, B. D., J. M. Chen, and Jinjun Liu. "Net primary productivity following forest fire for Canadian ecoregions." Canadian Journal of Forest Research 30, no. 6 (June 1, 2000): 939–47. http://dx.doi.org/10.1139/x00-025.

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Recent modelling results indicate that forest fires and other disturbances determine the magnitude of the Canadian forest carbon balance. The regeneration of post-fire vegetation is key to the recovery of net primary productivity (NPP) following fire. We geographically co-registered pixels classed using the Boreal Ecosystem Productivity Simulator, a process-based model with AVHRR (advanced very-high resolution radiometer) satellite estimates of leaf-area index and land cover type, with polygons from a recent database of large Canadian fires. NPP development with time since fire was derived for

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Hall-Atkinson, Cynthia, and Laurence C. Smith. "Delineation of delta ecozones using interferometric SAR phase coherence." Remote Sensing of Environment 78, no. 3 (December 2001): 229–38. http://dx.doi.org/10.1016/s0034-4257(01)00221-8.

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JHA, Radhika, Amita KANAUJIA, and Kaushalendra Kumar JHA. "Wintering habitat modelling for conservation of Eurasian vultures in northern India." Nova Geodesia 2, no. 1 (March 5, 2022): 22. http://dx.doi.org/10.55779/ng2122.

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Eurasian Black Vulture (EBV) and Eurasian Griffon Vulture (EGV), while residents elsewhere, winter in Uttar Pradesh, India. Knowledge of the habitat and regulating factors is obligatory for protection and better management of these vultures. Therefore, different types of habitats were mapped using eight species distribution models. Presence records from field survey, published data and citizen science, and 23 bioenvironmental raster layers were the model inputs. Eighteen models were developed whose strength varied greatly. As per the performance indicators, GBM and GLM were found to be superio

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Burton, Philip J., Marc-André Parisien, Jeffrey A. Hicke, Ronald J. Hall, and Jason T. Freeburn. "Large fires as agents of ecological diversity in the North American boreal forest." International Journal of Wildland Fire 17, no. 6 (2008): 754. http://dx.doi.org/10.1071/wf07149.

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The present study undertook a hierarchical analysis of the variability within and among some individual fire events in the boreal ecozones of Canada and Alaska. When stratified by ecozone, differences in the spatial and temporal distribution of wildfires were observed in the Canadian Large Fire Data Base that reflect climatic, terrain and land-use differences across the country. Remote-sensing data collected before and after boreal forest fires permitted a rigorous analysis of the variability in burn severity within individual fire events, and the identification of certain fire-prone and more

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Beierkuhnlein, Carl, and Jan-Christopher Fischer. "Global biomes and ecozones – Conceptual and spatial communalities and discrepancies." Erdkunde 75, no. 4 (December 8, 2021): 249–70. http://dx.doi.org/10.3112/erdkunde.2021.04.01.

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Various facets of global changes and related problems and challenges are asking for sound impact assessments and corresponding coping strategies. The human impact on nature is a major driver of biodiversity loss and restricted ecosystem functioning and services. Assessing such global changes is often done by using biomes as benchmarks. However, even if the wording and terminology seem common sense (‘tropical rain forest’, ‘steppe’, ‘boreal forest’) global biome units and maps deviate in many ways. This is well justified by their individual intention, expert opinions, disciplinary background, a

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Hopkinson, Chris, and Laura Chasmer. "Testing LiDAR models of fractional cover across multiple forest ecozones." Remote Sensing of Environment 113, no. 1 (January 2009): 275–88. http://dx.doi.org/10.1016/j.rse.2008.09.012.

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He, Yuhong, Xulin Guo, Paul Dixon, and John F. Wilmshurst. "NDVI variation and its relation to climate in Canadian ecozones." Canadian Geographer / Le Géographe canadien 56, no. 4 (August 16, 2012): 492–507. http://dx.doi.org/10.1111/j.1541-0064.2012.00441.x.

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Sunil Kumar, S., D. A. Evans, K. Muthulakshmi, T. DilipKumar, R. Heera Pillai, R. Radhakrishnan Nair, and Francis Sunny. "Distribution of Aedes aegypti and Aedes albopictus in different eco zones of Thiruvananthapuram city with special reference to dengue viremia in humans." ENTOMON 43, no. 4 (December 31, 2018): 223–30. http://dx.doi.org/10.33307/entomon.v43i4.402.

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Mosquito index study of three ecologically different ecozones of the Thiruvananthapuram district, Kerala showed sharp difference on the proportionate distribution of Aedes aegypti and Aedes albopictus. Human dengue viremia (HDV) was very high in those ecozones where A.aegypti density was high and HDV was low where A.albopictus was high. In a coastal zone of Thiruvananthapuram city, A. aegypti was the most abundant vector and in a hilly, arid suburban zone, A.albopictus was the abundant vector. In the urban zone both species of mosquitoes showed equal distribution. Study on the circulating sero

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Hammell, Gord. "Changes to the Population Status of Horned Grebes (Podiceps auritus) and Red-necked Grebes (Podiceps grisegena) in Southwestern Manitoba, Canada." Canadian Field-Naturalist 131, no. 4 (May 23, 2018): 317–24. http://dx.doi.org/10.22621/cfn.v131i4.2069.

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Continental trend data for North America suggest that Horned Grebe (Podiceps auritus) breeding populations are declining and Red-necked Grebe (P. grisegena) populations are increasing. However, data reliability is low due to lack of survey routes in the northern boreal and taiga ecozones, areas encompassing much of the breeding range of both species. Locally in the southern Manitoba prairie ecozone, reliability of long-term trend data is also considered low and these data suggest that Horned Grebe populations are declining faster than the continental trend and that Red-necked Grebe populations

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Minns, Charles K., James E. Moore, Brian J. Shuter, and Nicholas E. Mandrak. "A preliminary national analysis of some key characteristics of Canadian lakes." Canadian Journal of Fisheries and Aquatic Sciences 65, no. 8 (August 2008): 1763–78. http://dx.doi.org/10.1139/f08-110.

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Knowledge of Canada’s lakes is needed to manage environmental stresses. Lake inventory and lake feature databases were used to build a national impact assessment template and assess regional typology. There are ~910 400 lakes with area ≥ 0.1 km2(10 ha), 37% of the Earth’s total. Lake features (number of lakes by size class, maximum depth, mean–maximum depth ratio, Secchi depth, pH, and total dissolved solids) were modeled regionally by secondary watershed (SWS) using linear regression models. Lake trout ( Salvelinus namaycush ) occurrence was analyzed as a cofactor to highlight regional links

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Amiro, B. D., K. A. Logan, B. M. Wotton, M. D. Flannigan, J. B. Todd, B. J. Stocks, and D. L. Martell. "Fire weather index system components for large fires in the Canadian boreal forest." International Journal of Wildland Fire 13, no. 4 (2004): 391. http://dx.doi.org/10.1071/wf03066.

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Canadian Fire Weather Index (FWI) System components and head fire intensities were calculated for fires greater than 2 km2 in size for the boreal and taiga ecozones of Canada from 1959 to 1999. The highest noon-hour values were analysed that occurred during the first 21 days of each of 9333 fires. Depending on ecozone, the means of the FWI System parameters ranged from: fine fuel moisture code (FFMC), 90 to 92 (82 to 96 for individual fires); duff moisture code (DMC), 38 to 78 (10 to 140 for individual fires); drought code (DC), 210 to 372 (50 to 600 for individual fires); and fire weather ind

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Castrignanò, Annamaria, Daniela De Benedetto, Giacoma Girone, Francesca Guastaferro, and Donato Sollitto. "Characterization, Delineation and Visualization of Agro- Ecozones Using Multivariate Geographical Clustering." Italian Journal of Agronomy 5, no. 2 (June 30, 2010): 121. http://dx.doi.org/10.4081/ija.2010.121.

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Schmid, Rudolf, J. Schultz, Inge Jordan, and Derek Jordan. "The Ecozones of the World: The Ecological Divisions of the Geosphere." Taxon 44, no. 4 (November 1995): 666. http://dx.doi.org/10.2307/1223535.

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Nealis, V. G., I. DeMerchant, D. Langor, M. K. Noseworthy, G. Pohl, K. Porter, E. Shanks, R. Turnquist, and V. Waring. "Historical occurrence of alien arthropods and pathogens on trees in Canada." Canadian Journal of Forest Research 46, no. 2 (February 2016): 172–80. http://dx.doi.org/10.1139/cjfr-2015-0273.

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The Canadian Forest Invasive Alien Species (CanFIAS) database provides point records of alien arthropod (insects and mites) and pathogen (fungi) species found on trees in Canada extracted from more than 100 years of national surveys. Each record includes a species identification, location, year of observation, and host association and is linked electronically to its original source. More than 175 000 records of 329 alien arthropod species and 11 plant pathogens are available. Historical rates of detection, as indicated by first records, were greatest in the decades following the two world wars

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de Roos, Baukje, Nanna Roos, Abdullah-Al Mamun, Tahmeed Ahmed, Alan A. Sneddon, Francis Murray, Eleonor Grieve, and David C. Little. "Linking agroecosystems producing farmed seafood with food security and health status to better address the nutritional challenges in Bangladesh." Public Health Nutrition 22, no. 16 (September 5, 2019): 2941–49. http://dx.doi.org/10.1017/s1368980019002295.

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AbstractObjective:Aquaculture is one of the fastest-growing food production sectors in many low-income and food-deficit countries with aquatic ecozones. Yet its specific impact on nutrition and livelihood in local communities, where commercial and/or export-orientated aquaculture activities are developed, is largely unknown.Design:The present narrative and argumentative review aims to provide an overview of our current understanding of the connections between aquaculture agroecosystems, local and national fish production, fish consumption patterns and nutrition and health outcomes.Results:The

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Hansen, Matthew C., Peter V. Potapov, Amy H. Pickens, Alexandra Tyukavina, Andres Hernandez-Serna, Viviana Zalles, Svetlana Turubanova, et al. "Global land use extent and dispersion within natural land cover using Landsat data." Environmental Research Letters 17, no. 3 (March 1, 2022): 034050. http://dx.doi.org/10.1088/1748-9326/ac46ec.

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Abstract The conversion of natural land cover into human-dominated land use systems has significant impacts on the environment. Global mapping and monitoring of human-dominated land use extent via satellites provides an empirical basis for assessing land use pressures. Here, we present a novel 2019 global land cover, land use, and ecozone map derived from Landsat satellite imagery and topographical data using derived image feature spaces and algorithms suited per theme. From the map, we estimate the spatial extent and dispersion of land use disaggregated by climate domain and ecozone, where di

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