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Tesi sul tema "Vegetation and climate"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 29 luglio 2024

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1

Loptson, Claire A. "Modelling vegetation-climate interactions in past greenhouse climates." Thesis, University of Bristol, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.680126.

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The early Eocene to the Cretaceous (48-148 Ma) was a period in the Earth's history where the climate was much warmer than the present day, with no permanent ice sheets and atmospheric CO2 levels higher than the present day. Using the climate model HadCM3L coupled to a dynamic vegetation model, this thesis aims to analyse vegetation-climate interactions during these past greenhouse climates, and how the climate, vegetation and climate sensitivity of these time periods are influenced by changes in palaeogeography and CO2 . The results of these model simulations are also evaluated against climato

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2

Gebrehiwot, Worku Zewdie. "Climate, land use and vegetation trends." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-209668.

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Land use / land cover (LULC) change assessment is getting more consideration by global environmental change studies as land use change is exposing dryland environments for transitions and higher rates of resource depletion. The semiarid regions of northwestern Ethiopia are not different as land use transition is the major problem of the region. However, there is no satisfactory study to quantify the change process of the region up to now. Hence, spatiotemporal change analysis is vital for understanding and identification of major threats and solicit solutions for sustainable management of the

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3

Davies-Barnard, T. "Climate and crop interactions : the biogeophysical effects on climate and vegetation." Thesis, University of Bristol, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.685042.

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The interactions between changing agricultural land and climate are multi faceted and only partially understood. This thesis looks at interactions between crops and climate from assumptions about parameterisations that underpin crop changes in models; the unintended consequences of policies which affect land cover; and the impacts of deliberate crop changes (e.g. biogeoengineering). Focusing on the biogeophysical effects (from albedo, evapotranspiration etc.) these effects are compared to the biogeochemical effects (from greenhouse gases). There are considerable local and global biogeophysical

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4

Lee, S. E. "Modelling interactions between climate and global vegetation in response to climate change." Thesis, University of Sheffield, 1997. http://etheses.whiterose.ac.uk/2063/.

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Climate change associated with increasing concentrations of the greenhouse gas, carbon dioxide(CO2), is expected to lead to an increase in global mean temperature of between 1 and 3.5 deg C by the end of the 21st century, with regional changes in rainfall and humidity. This thesis is concerned with modelling the effects of a changing climate and atmospheric C02 concentration on global vegetation. The process-based model, DOLY (Dynamic glObal phtogeographY), is used. It is able to operate using three climate variables, two soil variables and an atmospheric CO2 concentration. Its outputs are lea

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5

Cohen, Yoav. "A comparison between vegetation indices for measuring vegetation dynamics resulting from climate variations /." [Beer Sheva] : Ben Gurion University of the Negev, 2008. http://aranne5.lib.ad.bgu.ac.il/others/CohenYoav.pdf.

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6

Davies, Katherine Siân. "Early Palaeocene vegetation and climate of North America." Thesis, University of Oxford, 1993. http://ora.ox.ac.uk/objects/uuid:4e48bfd5-f749-4d84-a132-c45fd8429fdc.

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Early Palaeocene floras from twenty seven sites within the Raton, southern Powder River and south-western Williston Basins of the western interior of North America were collected, and their leaf physiognomy, ecological character and depositional setting compared. Such a spread of samples enabled the study of spatial and temporal vegetational and climatic variations in the region, following the Cretaceous-Tertiary boundary event. Climatic changes are observed across the Cretaceous-Tertiary boundary. Precipitation increased dramatically, and remained relatively high throughout the earliest Palae

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7

Barichivich, J. "Responses of boreal vegetation to recent climate change." Thesis, University of East Anglia, 2014. https://ueaeprints.uea.ac.uk/49468/.

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The high northern latitudes have warmed faster than anywhere else in the globe during the past few decades. Boreal ecosystems are responding to this rapid climatic change in complex ways and some times contrary to expectations, with large implications for the global climate system. This thesis investigates how boreal vegetation has responded to recent climate change, particularly to the lengthening of the growing season and changes in drought severity with warming. The links between the timing of the growing season and the seasonal cycle of atmospheric CO2 are evaluated in detail to infer larg

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8

Tang, Guoping. "An examination of vegetation modeling-related issues and the variation and climate sensitivity of vegetation and hydrology in China." Thesis, Connect to title online (Scholars' Bank) Connect to title online (ProQuest), 2008. http://hdl.handle.net/1794/8543.

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Thesis (Ph. D.)--University of Oregon, 2008.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 128-156). Also available online in Scholars' Bank; and in ProQuest, free to University of Oregon users.

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9

Arain, Muhammad Altaf. "Spatial aggregation of vegetation parameters in a coupled land surface-atmosphere model." Thesis, The University of Arizona, 1994. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_etd_hy0049_m_sip1_w.pdf&type=application/pdf.

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10

Abraitienė, Jolita. "Climate-induced changes of vegetation in broadleaved deciduous forests." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20121024_111936-53102.

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The aim of the study was to investigate the influence of meteorological factors on the phenological phases of the vegetation in broadleaved forests under varying climatic conditions. To attain the aim, the following objectives were set: 1. Characterize the changes of values of meteorological parameters (temperature, precipitation) in the studied period; 2. Determine solar radiation intensity under the canopies of trees, phenological phases of trees and bushes and their changes; 3. Determine the changes of projection coverage, height and phenological phases of herbaceous plants during the growi

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11

Briggs, Kevin M. "Impacts of climate and vegetation on railway embankment hydrology." Thesis, University of Southampton, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.548223.

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12

Soong, Oliver. "Vegetation Establishment Following Floodplain Restoration in Mediterranean-climate California." Thesis, University of California, Santa Barbara, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10254066.

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<p> Although herbaceous communities are important components of floodplain ecosystems, the factors constraining their restoration and post-restoration dynamics are poorly understood. Over the decade following restoration of a 3.2 km reach of the Merced River and floodplain in California, we tracked herbaceous community composition to distinguish floodplain habitats and utilized perturbations from revegetation treatments and post-restoration flooding to generate community assembly rule hypotheses regarding treatment effectiveness and persistence, with a particular interest in native perennials

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13

Grieger, Rebekah. "Resilience of Coastal Freshwater Wetland Vegetation to Climate Change." Thesis, Griffith University, 2021. http://hdl.handle.net/10072/410470.

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Coastal wetlands are globally important ecosystems, valued for their provision of habitat, storm mitigation, water quality improvement, and carbon sequestration. Coastal wetlands are also one of the ecosystems most likely to be impacted by projected changes in climate, particularly changes associated with sea level rise, altered rainfall patterns, and changes to storm patterns and severity. Coastal freshwater wetlands (CFWs) are amongst the most understudied group of coastal wetlands and are characterised by freshwater dominated hydrology but can also experience periods of salinity associated

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14

Canon, Barriga Julio Eduardo. "Downscaling Climate and Vegetation Variability Associated with Global Climate Signals: a new Statistical Approach Applied to the Colorado River Basin." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195379.

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This research presents a new multivariate statistical approach to downscale hydroclimatic variables associated with global climate signals, from low-resolution Global Climate Models (GCMs) to high-resolution grids that are appropriate for regional and local hydrologic analysis. The approach uses Principal Component Analysis (PCA) and Multichannel Singular Spectrum Analysis (MSSA) to: 1) evaluate significant variation modes among global climate signals and spatially distributed hydroclimatic variables within certain spatial domain; 2) downscale the GCMs' projections of the hydroclimatic variabl

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15

Waha, Katharina. "Climate change impacts on agricultural vegetation in sub-Saharan Africa." Phd thesis, Universität Potsdam, 2012. http://opus.kobv.de/ubp/volltexte/2013/6471/.

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Agriculture is one of the most important human activities providing food and more agricultural goods for seven billion people around the world and is of special importance in sub-Saharan Africa. The majority of people depends on the agricultural sector for their livelihoods and will suffer from negative climate change impacts on agriculture until the middle and end of the 21st century, even more if weak governments, economic crises or violent conflicts endanger the countries’ food security. The impact of temperature increases and changing precipitation patterns on agricultural vegetation motiv

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16

Ström, Lotta. "Effects of climate change on boreal wetland and riparian vegetation." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-43811.

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Models of climate change predict that temperature will increase during the 21th century and the largest warming will take place at high northern latitudes. In addition to warming, predictions for northern Europe include increased annual precipitation and a higher proportion of the precipitation during winter falling as rain instead of snow. These changes will substantially alter the hydrology of rivers and streams and change the conditions for riverine communities. The warming is also expected to result in species adjusting their geographic ranges to stay within their climatic tolerances. Ripa

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17

Wetherley, Erin Blake. "Remote Sensing of Urban Climate and Vegetation in Los Angeles." Thesis, University of California, Santa Barbara, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10933172.

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<p> In cities, microclimates are created by local mixtures of vegetation, constructed materials, vertical structure, and moisture, with significant consequences for human health, air quality, and resource use. Vegetation can moderate microclimates through evapotranspiration, however this function is dependent on local conditions so its effect may vary over space and time. This dissertation used hyperspectral and thermal remote sensing imagery to derive key observations of urban physical and biophysical properties and model urban microclimates across the megacity of Los Angeles. In Chapter 1, I

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18

Bistinas, Ioannis. "Global interactions between fire and vegetation, human activities and climate." Doctoral thesis, ISA-UL, 2016. http://hdl.handle.net/10400.5/12022.

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Doutoramento em Engenharia Florestal - Instituto Superior de Agronomia - UL<br>Vegetation fires are an important component of the earth’s system land processes and have a significant impact on the vegetation and CO2 dynamics. The global fire patterns are not thoroughly explored and the drivers of fire regimes in global scale are interconnected. However, several modelling assumptions are contradicted by exploring those relationships partially. At global scale, fire extent is fuel limited, with climatic variables showing both positive and negative influence on fuel moisture conditions, and human

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19

Gambin, Belinda. "Vegetation history and climate dynamics in Malta : a Holocene perspective." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4384.

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Cette thèse étudie la dynamique de la végétation Holocène pour Burmarrad dans le NW Malte et fournit une reconstruction paléoclimatique quantitative à base de pollen pour cet archipel méditerranéen situé au centre. Le record de pollen donne un nouvel aperçu l'échange végétation 7280-1730 cal BP qui correspondent bien avec other régional dossiers. La reconstruction du climat fournit également forte corrélation avec les sites du sud (en dessous de 40oN) de la Méditerranée. L'interprétation suggère un paysage initialement ouvert au début du néolithique, se développer en un dense Pistacia brousse

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20

Walker, Thomas. "Climate and vegetation effects on the northern peatland carbon cycle." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/climate-and-vegetation-effects-on-the-northern-peatland-carbon-cycle(e5db91ba-7924-4317-952a-98b885b5e5b2).html.

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Anthropogenic emissions of the greenhouse gases carbon dioxide and methane have stimulated a rise in global surface temperature of 0.76 ºC since the turn of the 20th Century. Such climate warming has already had significant impacts on the terrestrial biosphere, raising concerns that ecosystems will feed back to future climate by altering the balance of carbon flow between the land and atmosphere. It is well established that warming can directly affect rates of photosynthesis and ecosystem respiration, which together dictate the carbon balance of most ecosystems. However, warming is also causin

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21

Ashcroft, Michael B. "The spatial variation of environmental factors on the Illawarra escarpment and their influence on vegetation patterns." School of Earth & Environmental Sciences - Faculty of Science, 2009. http://ro.uow.edu.au/theses/3042.

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Mapping and explaining the distribution of vegetation helps land managers to make systematic conservation planning decisions. This is typically achieved using models that correlate the distribution of species with environmental factors, and can predict the vegetation at unsurveyed locations. These Species Distribution Models (SDMs) have numerous unresolved issues, but serve as a useful first-pass approximation for planning purposes.This thesis investigates some of the uncertainties of SDMs, including the impact of data accuracy, the incorporation of spatial processes, the evaluation of alterna

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22

Gornall, Jemma. "The functional role of mosses in Arctic ecosystems." Thesis, University of Aberdeen, 2005. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=153316.

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In arctic tundra ecosystems mosses dominant the vegetation in terms of productivity and diversity. Despite this, mosses are often overlooked in studies of tundra ecology. However, evidence from this thesis suggests that mosses maybe integral to the functioning of these systems. Mosses insulate soil keeping it cooler than air temperature, an effect more apparent under deeper moss. The effects of the moss layer on soil characteristics alter conditions for microbial populations resulting in higher nitrogen availability in soil under shallow moss. This thesis shows that the role of mosses in

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23

Wei, Jiangfeng. "Land-atmosphere interaction and climate variability." Diss., Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-05162007-151312/.

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Thesis (Ph. D.)--Earth and Atmospheric Sciences, Georgia Institute of Technology, 2008.<br>Stieglitz, Marc, Committee Member ; Guillas, Serge, Committee Member ; Fu, Rong, Committee Member ; Curry, Judith, Committee Member ; Dickinson, Robert, Committee Chair.

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24

Handiani, Dian Noor [Verfasser], André [Akademischer Betreuer] Paul, Michael [Akademischer Betreuer] Schulz, and Michal [Akademischer Betreuer] Kucera. "Tropical climate and vegetation cover during Heinrich event 1: Simulations with coupled climate vegetation models / Dian Noor Handiani. Gutachter: Michael Schulz ; Michal Kucera. Betreuer: André Paul." Bremen : Staats- und Universitätsbibliothek Bremen, 2012. http://d-nb.info/1072046652/34.

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25

Borgelt, Jan. "Terrestrial respiration across tundra vegetation types." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-132765.

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Large amounts of carbon (C) are stored in tundra soils. Global warming may turn tundra ecosystems from C sinks into sources or vice versa, depending on the balance between gross primary production (GPP), ecosystem respiration (ER) and the resulting net ecosystem exchange (NEE). We aimed to quantify the summer season C balance of a 27 km2 tundra landscape in subarctic Sweden. We measured CO2 fluxes in 37 widely distributed plots across five tundra vegetation types and in 7 additional bare soil plots, to assess effects of abiotic and biotic components on C exchange. C fluxes in bare soils were l

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26

Lewis, Warren James. "Upper Cretaceous palynofacies, vegetation and climate of the North Slope, Alaska." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260679.

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27

Craggs, Helen Jane. "Cretaceous climate and vegetation : model evaluation using ancient plants and sediments." Thesis, Open University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.446276.

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28

Wang, Guiling 1971. "The role of vegetation dynamics in the climate of West Africa." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/17486.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2000.<br>Includes bibliographical references (p. 211-224).<br>The climate of West Africa exhibits significant variability at the time scale of decades. The persistent drought of the past three decades is an example of such variability. This study investigates the role of vegetation dynamics in shaping the low-frequency variability of the climate over West Africa. A zonally symmetric, synchronously coupled biosphere-atmosphere model (ZonalBAM) which includes explicit representation of vegetation

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29

Barnes, Mallory L., M. Susan Moran, Russell L. Scott, Thomas E. Kolb, Guillermo E. Ponce-Campos, David J. P. Moore, Morgan A. Ross, Bhaskar Mitra, and Sabina Dore. "Vegetation productivity responds to sub-annual climate conditions across semiarid biomes." WILEY-BLACKWELL, 2016. http://hdl.handle.net/10150/616989.

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In the southwest United States, the current prolonged warm drought is similar to the predicted future climate change scenarios for the region. This study aimed to determine patterns in vegetation response to the early 21st century drought across multiple biomes. We hypothesized that different biomes (forests, shrublands, and grasslands) would have different relative sensitivities to both climate drivers (precipitation and temperature) and legacy effects (previous-year's productivity). We tested this hypothesis at eight Ameriflux sites in various Southwest biomes using NASA Moderate-resolution

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30

Bórnez, Mejías Kevin. "Study of vegetation dynamics from satellite: phenological responses to climate change." Doctoral thesis, Universitat Autònoma de Barcelona, 2021. http://hdl.handle.net/10803/673693.

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La fenologia és la clau per a controlar els processos fisicoquímics i biològics, especialment l’albedo, la rugositat superficial, conductància de les fulles, fluxos de carboni, aigua i energia. Per tant, l’estimació de la fenologia és cada vegada més important per a comprendre els efectes del canvi climàtic en els ecosistemes i les interaccions biosfera-atmosfera. La teledetecció és una eina útil per a caracteritzar la fenologia, encara que no existeix un consens sobre el tipus de sensor satel·litari i metodologia òptims per a extreure mètriques fenològiques. Els objectius principals de la

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31

Lim, Sophak. "50,000 years of vegetation and climate change in the Namib Desert." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT150/document.

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Cette thèse présente les données des pollens et micro-charbons fossiles couvrant la période des 50 000 dernières années à partir de sites sélectionnés transversalement nord-sud du désert de Namib. Dans le cadre de cette thèse, on utilise le rock hyrax middens, l’accumulation des boulettes et des urines fossilisés du Procavia capensis, représentant une excellente archive pour archives pour la préservation des pollens et micro-charbons à long-terme. Trois sites des hyrax middens ont été sélectionnés pour l'analyse: au sud du désert de Namib (Pella), la marge est des dunes de sable de Namib (Zizo

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32

Ekman, Malin. "The effect of climate on vegetation cover in Swedish mountain regions." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-72682.

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Climate change, with a higher temperature, is making the snow covered period shorter in the Swedish mountain region. This represents a threat towards plant species at high altitudes which, due to their sensitivity to temperature changes, will likely lead to a change in plant species composition. The purpose of this study was to determine if there has been any change in vegetation cover in the Swedish mountain region and if temperature has changed, based on data from a long-term monitoring program called National Inventory of Landscapes in Sweden (NILS), and data collected from the Swedish Mete

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33

Shockey, Melissa Dawn. "Incorporating Climate Sensitivity for Southern Pine Species into the Forest Vegetation Simulator." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/22031.

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Growing concerns over the possible effects of greenhouse-gas-related global warming on North American forests have led to increasing calls to address climate change effects on forest vegetation in management and planning applications. The objectives of this project are to model contemporary conditions of soils and climate associated with the presence or absence and abundance of five southern pine species: shortleaf pine (Pinus echinata Mill.), slash pine (P. elliottii Engelm.), longleaf pine (P. palustris Mill.), pond pine (P. serótina Michx.), and loblolly pine (P. taeda L.). Classification

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34

Kosanic, Aleksandra. "Ecological responses to climate variability in west Cornwall." Thesis, University of Exeter, 2014. http://hdl.handle.net/10871/18120.

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Recent (post-1950s) climate change impacts on society and ecosystems have been recognised globally. However these global impacts are not uniform at regional or local scales. Despite research progress on such scales there are still gaps in the knowledge as to 'what' is happening and 'where'? The goal of this study addresses some of these gaps by analysing climate variability and vegetation response at the furthest south westerly peninsula of the United Kingdom. This research is focused on West Cornwall (South West England) - an area dominated by a strong maritime influence. The first part of th

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Scharf, Elizabeth Ann. "Long-term interactions of climate, vegetation, humans, and fire in eastern Washington /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/6444.

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Callaghan, Lynsey Elizabeth. "Climate and vegetation effects on sediment transport and catchment properties along an arid to humid climatic gradient." Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/6213.

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Recent attempts to elucidate a climatic effect on erosion rates at the catchment scale have generally found little or no correlation between precipitation and erosion rates, yet climate has been shown to exert a significant control on landscape properties such as drainage density, slope and relief. That erosion rates to do not directly reflect climatic conditions may not come as a surprise, since erosion rates will tend to keep pace with uplift rates in a tectonically active landscape. The interplay between erosion rates and climate may therefore be better understood with reference to the eros

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Ivory, Sarah Jean. "Vegetation and Climate of the African Tropics for the Last 500,000 Years." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/293752.

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In the last few decades, we have been witness to unprecedented changes in precipitation and temperature. Such alterations to our climate system have important implications for terrestrial ecosystems that billions of people depend on for their livelihood. The situation is especially tenuous for those living directly off the landscape via resources from natural ecosystems or subsistence agriculture as in much of tropical Africa. Studies of past climates provide potential analogues and help validate models essential for elucidating mechanisms that link changes in climate mean and variability a

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38

Rees-Owen, Rhian Laura. "Antarctic climate and vegetation during the Neogene : a geochemical and modelling approach." Thesis, University of Leeds, 2016. http://etheses.whiterose.ac.uk/15445/.

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During the mid- to late Neogene (20 - 2.5 million years ago), episodic retreat of the Antarctic Ice Sheet (AIS) coincided with periods of higher-than-present atmospheric CO2, indicating ice sheet sensitivity to climatic conditions similar to those projected for the coming decades. Understanding Antarctic climate and vegetation during such a period of AIS retreat is crucial for our fundamental understanding of high latitude environments in warmer-than-present climate scenarios. This thesis presents a detailed geochemical study of sediments and plant fossils from the terrestrial Sirius Group of

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Mat, Nashriyah Binti. "Flooding tolerance and survival in higher plant storage tissue." Thesis, University of St Andrews, 1985. http://hdl.handle.net/10023/14349.

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Gordon, Carmen. "The effects of environmental change on competition between heather and bracken." Thesis, University of Aberdeen, 1998. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU531073.

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Vegetation dominated by heather and bracken, two common species of the UK uplands, is often nutrient limited and heavily influenced by climate. Thus, changes in climate or nutrient availability might be expected to have pronounced effects on growth and competition between these species. Mature heather and bracken turfs, transplanted from the field into 1 x 1 by 0.5 m deep plots, were subjected to factorial experimental treatments of root competition, shoot competition, summer drought, increased nitrogen supply and increased temperature for four consecutive years. The effects of root competitio

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Jiang, Huiquan. "Incorporating Climate Sensitivity for Eastern United States Tree Species into the Forest Vegetation Simulator." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/75220.

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Detecting climate-induced effects in forest ecosystems become increasingly important as more evidence of greenhouse-gas-related climate change were founded. The Forest Vegetation Simulator (FVS) is an important growth and yield model used to support management and planning on public forest lands over the southern United States, however its prediction accuracy was challenged due to its climate- insensitive nature. The goal of this study was to develop species-specific prediction models for eastern U.S. forest tree species with climate and soil properties as predictors in order to incorporate t

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Brown, Kendrick Jonathan. "Late quaternary vegetation, climate, fire history, and GIS mapping of Holocene climates on southern Vancouver Island, British Columbia, Canada." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ52755.pdf.

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43

Ndlala, Noluthando. "Remote sensing drought impacts on wetland vegetation productivity at the Soetendalsvlei in the Heuningnes Catchment, South Africa." University of Western Cape, 2021. http://hdl.handle.net/11394/8329.

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>Magister Scientiae - MSc<br>This work aimed at assessing the response of wetland vegetation productivity to the 2014-2017 climate-induced drought at the Soetendalsvlei wetland system in the Western Cape province of South Africa. To achieve this objective, firstly a literature review on the progress of remotely sensed data applications in assessing and monitoring wetland vegetation productivity was conducted. The review elaborates on the role of remote sensing in monitoring and assessing wetland vegetation productivity, with a detailed discussion of the climate change and variability impacts o

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Brault, Marc-Olivier. "Asessing the impacts of late Pleistocene megafaunal extinctions on global vegetation and climate." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110760.

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The end of the Pleistocene marked a turning point for the Earth system, as climate gradually emerged from millennia of severe glaciation in the Northern Hemisphere. It is widely known that the deglacial climate change then was accompanied by an unprecedented decline in many species of large terrestrial mammals, featuring among others the near-total eradication of the woolly mammoth. Due to a herbivorous diet that involved the grazing of a large number of trees, their extinction is thought to have contributed to the rapid and well-documented expansion of dwarf deciduous trees in Siberia and Ber

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Wang, Yi 1969. "Simulation of the climate, ocean, vegetation and terrestrial carbon cycle in the holocene." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=86064.

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In this thesis, the "green" McGill Paleoclimate Model (MPM) is developed by interactively coupling the five-component physical MPM with a Dynamic Global Vegetation Model (DGVM) known as VECODE (VEgetation COntinuous DEscription model). Three applications to the pre-industrial Holocene climate, ocean, vegetation and terrestrial carbon cycle dynamics are presented, after a new land surface scheme is introduced. In these applications, orbital (Milankovitch) forcing and prescribed atmospheric CO2, starting from eight thousand years before present (8 kyr BP), are applied. In addition, a pres

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Araghi-Rahi, Alireza. "Relationships among soil carbon, nitrogen, climate, and vegetation in forests of British Columbia." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/46264.

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More than two-thirds of the terrestrial carbon is found within the first meter of the soils, which is determined by the imbalance between fraction of net primary production entering soil and decomposition of organic matter. Changes in soil C contents in response to climate change may trigger a feedback that can influence the trend and scale of the climate change. Nitrogen can also limit primary production and influence decomposition of organic matter. In this thesis, I assess the relationships of soil C and N with measures of aboveground productivity, abundances of vegetation and climate in co

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47

Hough-Snee, Nathaniel. "Relationships between Riparian Vegetation, Hydrology, Climate and Disturbance across the Western United States." Thesis, Utah State University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10154374.

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<p> Flow regime, the magnitude, duration and timing of streamflow, controls the development of floodplain landforms on which riparian vegetation communities assemble. Streamflow scours and deposits sediment, structures floodplain soil moisture dynamics, and transports propagules. Flow regime interacts with environmental gradients like climate, land-use, and biomass-removing disturbance to shape riparian plant distributions across landscapes. These gradients select for groups of riparian plant species with traits that allow them to establish, grow, and reproduce on floodplains – <i>ripari

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Gallaher, Kirsten S. L. "Reconstruction of late Holocene vegetation and climate of Hluhluwe Mfolozi area using phytoliths." Bachelor's thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/26585.

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This study presents a phytolith record from a late Holocene sedimentary core from the Hluhluwe-iMfolozi area in northeastern KwaZulu-Natal. Radiocarbon dating showed the oldest sediments to be from 23 80 ± 40 BP. Phytoliths are present throughout the record. There was a high degree of unclassifiable phytoliths (>79% per sub-sample), but preliminary trends identified include a dominance of C₄ grasses throughout (Chloridoideae and Panicoideae; adapted to higher temperatures and greater insolation), and slightly more C₃ grasses (Pooideae; adapted to cooler temperatures and/or winter rainfall) tow

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Vining, Sarah Rose, and Sarah Rose Vining. "Shifts in Arctic Vegetation May Fuel Feedbacks to Climate Change in Peatland Regions." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/625232.

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Changing sub‐Arctic plant communities can be an important feedback to climate change, via shifts in quantity and quality of litter production. Litter inputs to soil have appreciable influence on soil organic matter and microbial dynamics and consequently may provide a feedback to climate change in the sub‐Arctic. As permafrost peatlands thaw in response to climate change, the community composition of vegetation has been observed to shift from smaller and woodier shrubs to larger, more biodegradable sedges. We tested the hypothesis that carbon (C) stored in plant biomass increases across

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Hoyt, Cathryn A. "Grassland to desert : Holocene vegetation and climate change in the northern Chihuahuan Desert /." Digital version:, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p9992819.

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