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Dissertations / Theses on the topic 'Vegetation composition'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 June 2025

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1

Nel, Jacques A. "Vegetation and microbial determinants of soil carbon isotopic composition." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/28072.

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Typically, soil δ¹³C and δ¹⁵N values tend to increase with depth across a wide range of ecosystems. Changes in δ¹³C with depth have been attributed to vegetation changes (i.e. C₃/C₄ shifts), but the similarity in δ¹³C and δ¹⁵N profiles suggest that microbial decomposition may play an important role. The determinants of soil δ¹³C and δ¹⁵N, however, are complex and microbial decomposition and vegetation shifts are not the only mechanisms that drive the fractionation of the isotopes with depth. We explored the utility of using δ¹³C as a proxy for vegetation change by considering alternative mecha

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2

Weston, Terrill Ross. "Nutrient composition of rangeland vegetation harvested in southeast Wyoming." Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1313917081&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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3

Tratt, Rosalind. "The Scottish Borders fens : controls on vegetation development and composition." Thesis, University of Sheffield, 1997. http://etheses.whiterose.ac.uk/2967/.

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The Scottish Borders fens represent an important group of British fen sites. Despite their small size many of these fens support various rare plant communities and nationally and locally rare plant species as well as a wide range of species characteristic of wetland habitats. This study has demonstrated the importance of management history, site chemical conditions and site size and morphology in the vegetation development of the Scottish Borders fens. 2. Sixty-eight sites were included in a general survey. The vegetation at these sites was systematically recorded. Site features (vegetation ra

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4

von, Behren Christa. "Composition and Dispersal Dynamics of Vegetation Communities in Urban Riparian Forests." PDXScholar, 2018. https://pdxscholar.library.pdx.edu/open_access_etds/4409.

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In urban riparian areas, vegetation composition may be affected by urban land use changes at both the stream reach and the watershed scale. Moreover, the mechanisms by which seeds disperse may be affected both by reduction in seed sources due to vegetation removal and by the urban stream syndrome that produces flashier hydrographs and incised channels. I hypothesized that vegetation communities with high cover of native and hydrophilic species would be found in watersheds with high forest cover, while more limited cover of these species would be found in highly developed watersheds. Additional

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5

Cochrane, C. Hamish. "Effect of vegetation composition and hunting on habitat selection by feral goats." Thesis, University of Canterbury. Environmental Science, 1999. http://hdl.handle.net/10092/4808.

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Feral goats are a continuing threat to conservation values in New Zealand. First introduced in 1773 feral goats have spread to occupy many areas of public conservation land. Organised control of feral goats by private landholders began in the early 1900s, but it was not until the mid 1930s that organised government control began. From the 1960s onwards substantial changes are evident in the philosophy governing the control of introduced herbivores in New Zealand, changes that have marked a move away from emphasising the pests per se to focusing upon the resource under threat.

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6

Corney, Philip Mark. "Assessment of the factors influencing woodland field-layer vegetation composition across Britain." Thesis, University of Liverpool, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428369.

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7

Miquelajauregui, Yosune. "Vegetation community development eight years after harvesting in small streams buffers at the Malcolm Knapp Research Forest." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/724.

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Riparian areas connect terrestrial and aquatic environments. The objectives of this research were to compare the vegetation community composition and structure eight years after harvesting and to explore successional trends among buffer widths at year eight after disturbance and in a chronosequence. A series of small clearcuts were harvested in 1998 in a 70 year old second growth stand at the Malcolm Knapp Research Forest and 0m, 10m and 30m reserve zones were established adjacent to the streams. Each treatment was replicated 3 times and 3 unharvested streams were identified as controls. Overs

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8

Kretz, Lena. "The role of adjacent vegetation on the recovery of riparian flora : Effect of upstream and upland vascular vegetation after stream restoration in a boreal catchment." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-108082.

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Restoration of streams that were formerly channelized for timber-floating has become increasingly common. Generally, this restoration returns boulders from riparian zones to streams, leading to wider, more heterogeneous channels with slower flows. The primary goal is to enhance fish populations, but riparian vegetation is also expected to be favoured. However, increases in floristic diversity have not been observed and reasons for this slow response are still unknown. One possible explanation might be the lack of colonist pools. I therefore investigated how surrounding plant compositions influ

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9

Van, Tonder Carlo. "Factors influencing species richness, cover and composition of vegetation on Namaqualand quartz fields." Thesis, Nelson Mandela Metropolitan University, 2006. http://hdl.handle.net/10948/630.

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Quartz fields contribute significantly to plant diversity in the Succulent Karoo biome. They are distinctly different from surrounding habitats and have high levels of plant endemism. Biological soil crusts are features of quartz field soils and fulfill a vital function in that they stabilize soils. It is important for managers of nature reserves and agricultural rangelands to know what factors influence quartz field soils and vegetation. Both stakeholders could benefit from new information that would allow for informed decision-making regarding land-use on quartz fields. The present study too

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10

Simonson, William David. "Vegetation structure and composition of mediterranean oak forests : an investigation with airborne lidar." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607736.

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11

Gradowski, Tomasz Aleksander. "The influences of geoclimatic site conditions, disturbance type and canopy composition on the composition of understorey vegetation of boreal mixedwoods." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ58807.pdf.

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12

Yalaltdinova, Albina. "Elemental Composition of Vegetation as an Indicator of Technogenic Influence in Ust-Kamenogorsk City." Thesis, Troyes, 2015. http://www.theses.fr/2015TROY0029/document.

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L’accroissement de l’urbanisation et le développement industriel modifient la composition des géosphères de la Terre, en augmentant le nombre de problèmes géoécologiques et en affectant négativement la santé humaine. Actuellement, plus d'attention est accordée à la surveillance de l'état des composants de l’environnement naturel urbain. En Russie, les méthodes biogéochimiques (par ex., l'application de feuilles des arbres comme un récepteur naturel de la pollution) sont largement utilisées pour caractériser les problèmes géoécologiques des territoires dans des conditions d’intensité d’activité

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13

Adkins, Nicholas. "Vegetation Assessment to Understand the Effect of Feral Goat Populations on Native Flora Composition." Thesis, University of Canterbury. School of Forestry, 2012. http://hdl.handle.net/10092/7466.

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A vegetation assessment was conducted to understand the effect of feral goats (Capra hircus) on the vegetation of Isolated Hill Scenic Reserve located in Southern Marlborough. New Zealand forests evolved without the pressure of mammalian herbivores but following human settlement they became subject to intensive browsing following the introduction of exotic mammals. This study focuses on the presence of feral goats. Interest arises from the settlement of other countries and the subsequent liberations of feral goats which are now considered to be responsible for the significant removal of nativ

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14

Edmund, Alison. "Relationships among tree-species composition, vegetation structure, and forest breeding birds in southern Illinois." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/653.

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Oaks (Quercus spp.) have dominated eastern forests of the United States for centuries; however, current disturbance regimes discourage oak recruitment and allow shade-tolerant mesophytic species (e.g., maples, Acer spp.) to out-compete oaks. I assessed the effects of mesophication on bird communities by examining differences in breeding bird community structure, abundance, and diversity across 8 and 12 deciduous forest stands in southern Illinois during 2009 and 2010, respectively, using line transects, and by examining a 5-year monitoring data set from across the Shawnee National Forest in 2

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15

Lindgren, Åsa. "Effects of herbivory on arctic and alpine vegetation." Doctoral thesis, Stockholm University, Department of Botany, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-6746.

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<p>The distribution of plant species and functional traits in alpine and arctic environments are determined by abiotic conditions, but also by biotic interactions. In this thesis, I investigate interactions among plants and herbivory effects on plant community composition and plant functional traits in three different regions: Swedish Lapland, Beringia (USA/Russia) and Finnmark (Norway). Reindeer grazing was found to be extensive in southern Lapland and had limited effects on plant community composition and seedling germination. However, reindeer presence was found to influence plant functiona

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16

Dong, T. T. Trang. "Chemical composition and toxicity of emissions from burning five vegetation types of Western Australia under experimental combustion conditions." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2019. https://ro.ecu.edu.au/theses/2180.

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This study investigated the emission factors (EFs) for inorganic gases (CO2, CO, SO2, NO and NO2), carbonyls (formaldehyde, acetaldehyde, acetone, propionaldehyde, butyraldehyde and benzaldehyde), volatile organic compounds (VOCs) and particulate matter (PM2.5 and PM10) from laboratory-based fires of vegetation from five typical vegetation types of Western Australia. Species burnt were three grasslands (Spinifex represented by Triodia basedowii, Kimberley grass represented by Sehima nervosum and Heteropogon contortus, and an invasive grass represented by Ehrharta calycina (Veldt grass)), Banks

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17

Gustafson, Tomas Berg Åke. "Bird communities and vegetation on Swedish wet meadows : importance of management regimes and landscape composition /." Uppsala : Swedish University of Agricultural Sciences, 2006. http://diss-epsilon.slu.se/archive/00001234/.

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Thesis (doctoral)--Swedish University of Agricultural Sciences, 2006.<br>Errata sheet inserted. Appendix includes reproductions of papers and manuscripts co-authored with Åke Berg. Includes bibliographical references. Issued also electronically via World Wide Web in PDF format; online version lacks appendix of papers.

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18

Strömberg, Pernilla. "Förändringar i vegetationens sammansättning efter en våtmarksrestaurering : Changes in the vegetation composition after a wetlandrestoration." Thesis, Karlstad University, Division for Environmental Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-1715.

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<p>The loss of such great wetlands, which has arose in Sweden the last decades, has created a situation that threats both the function and the biological diversity within the wetlands. Many ecological niches can be found in the wetlands and it is one of the habitats where most different species exist. In the 17th Century people started to ditch damp environments, such as bogs, to create a productive cultivated ground. Further ditches were made when the forestry gave large economical profits. The wetlands were impoverished from both groundwater and nourishment, and this led to a great loss of s

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Shoutis, Levia Nima. "Composition and modeling of riparian vegetation in the West Fork of the Gallatin River Watershed." Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/shoutis/ShoutisL0807.pdf.

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Riparian areas contribute to the health of watersheds through their influence on hydrologic, biogeochemical, physical, and ecological processes. Limited research has focused on riparian systems of small mountain watersheds in the western U.S., which are increasingly under pressure from development activities. Watershed managers would benefit from an increased understanding of environment-riparian relationships in mountainous watersheds, for the purpose of assessing habitat and potential available nutrient buffering. This study assessed vegetation-environment relationships using digitally-deriv

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20

Isherwood, Ewan. "The Effect of Contemporary Hydrologic Modification on Vegetation Community Composition Distinctness in the Florida Everglades." FIU Digital Commons, 2013. http://digitalcommons.fiu.edu/etd/1027.

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The historic Everglades Ridge and Slough landscape maintained regularly spaced and elevated sawgrass ridges interspersed among exposed deeper-water sloughs; however, widespread but irregular hydrologic modification has degraded much of this landscape patterning. My study assessed the effects of hydrologic modification on vegetation community distinctness within the Ridge and Slough landscape through sampling species composition at fine-scales along a hydrologic gradient to measure the magnitude of segregation of species among patch types. The results show that vegetation community and topograp

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21

Gustafson, Tomas. "Bird communities and vegetation on Swedish wet meadows : importance of management regimes and landscape composition /." Uppsala : Swedish University of Agricultural Sciences, 2006. http://diss-epsilon.slu.se/archive/00001234/.

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Thesis (doctoral)--Swedish University of Agricultural Sciences, 2006.<br>Title from PDF file as viewed on 11/28/2006. Includes bibliographical references. Also available in print. Print version includes appendices.

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22

Hayati, A. A. A. "The effects of mineral nutrient factors in determining the species composition of acid mire vegetation." Thesis, University of Exeter, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353996.

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23

BOUABDALLAN, EL-HADI. "La vegetation steppique sur sols sales des hautes-plaines sud-algeroises. Composition, structure et production." Paris 11, 1992. http://www.theses.fr/1992PA112472.

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Ce travail a pour but de promouvoir une demarche permettant l'evaluation de la production des communautes vegetales steppiques sur sols sales des hautes-plaines sud-algeroises, a des fins d'applications pastorales. Cette vegetation, de type mosaique, est formee par la combinaison de communautes vivaces et annuelles. Les releves de ces composantes ont ete soumis separement a une analyse factorielle des correspondances. Les resultats obtenus ont permis, au plan fondamental, une hierarchisation syntaxonomique distincte des groupements vegetaux vivaces et annuels, et au niveau applique, la definit

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24

Gezelius, Walter. "The significance of tributary mouths for species richness and composition in riparian vegetation of regulated rivers." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-184730.

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River regulation cause unnatural water flow patterns which disrupt succession, survival and dispersal of riverine plant communities. Riparian zones in regulated rivers are generally more species poor and have a lower vegetation cover compared to free-flowing rivers. Tributary mouths within the impoundment however, are not only affected by processes in the main channel, but also affected by processes such as sediment dynamics and flooding regime from the tributary which may more reflect a natural regime and may therefore not be affected by hydropeaking to the same extent. Hence, tributary sites

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25

Hassel, Anna. "Post-fire species composition and regeneration of understory vegetation in a boreal forest in central Sweden." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-143963.

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Post-fire survival, composition and regeneration of understory species in the boreal forest have shown to be affected by several factors, where consumption of the organic soil layer together with altered soil properties play important parts. There has however also been shown that the pre-fire site characteristics affect the post-fire understory vegetation. This study aimed to investigate the effects of fire and pre-fire site characteristics on understory regeneration and composition at a local scale in a boreal forest. Classification of species richness of the understory species together with

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26

Wilson, Benjamin R. "Evalutating the effects of wildfire in pinon-juniper woodlands on bighorn sheep habitat and vegetation composition." Thesis, Colorado State University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1558338.

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<p> I evaluated the efficacy of using woodland fire to alter vegetation composition in a manner that augments desert bighorn sheep (<i>Ovis canadensis nelsoni </i>) habitat in the Black Ridge Canyons Wilderness Area in western Colorado. I applied generalized linear mixed models to estimate pre–fire ewe habitat selection and then simulated a hypothetical widespread fire to spatially predict where fire would be most beneficial in expanding habitat. I found that ewes were avoiding habitats with high woodland canopy cover, the habitat most likely to be removed by fire. Given the removal of a

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27

Wing, Brian R. "The Role of Vegetation Structure, Composition, and Nutrition in Greater Sage-Grouse Ecology in Northwestern Utah." DigitalCommons@USU, 2014. https://digitalcommons.usu.edu/etd/3558.

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The greater sage-grouse (Centrocercus urophasianus; sage-grouse) is the largest grouse species in North America and an indicator species for the condition of sagebrush (Artemisia spp.) ecosystems. The Box Elder Sage-Grouse Management Area (SGMA) in northwestern Utah encompasses one of the state’s largest sage-grouse populations. To fill knowledge gaps regarding the population inhabiting the Raft River subunit of the Box Elder SGMA, I captured, radio-marked, and monitored 123 (68 female, 55 male) sage-grouse from January 2012 through December 2013. My purpose was to describe how the seasonal mo

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Hannon, Gina E. "The use of plant macrofossils and pollen in the palaeoecological reconstruction of vegetation /." Alnarp : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5640-1.pdf.

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29

Maradiaga, Rodriguez Dalila del Carmen. "Comparing the structure and composition of riparian woodlands in three northeast Kansas lake watersheds." Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/15041.

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Master of Science<br>Department of Horticulture, Forestry, and Recreation Resources<br>Charles Barden<br>Riparian forests are more effective than other land cover types at stabilizing stream banks during high water events. Tree trunks and roots can slow flood-waters, thus retaining sediment deposition within riparian areas instead of downstream in reservoirs. This project is part of a larger, multi-agency study on reducing sedimentation of federal reservoirs. Between August 2010 and May 2012, riparian forests were assessed in the watersheds of three northeast Kansas lakes: Atchison County, Ban

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30

Morrell, Susan C. "A Comparison of Vegetation Composition in Urban and Rural Floodplans Following Removal of Chinese Privet (Ligustrum Sinense)." Digital Archive @ GSU, 2012. http://digitalarchive.gsu.edu/geosciences_theses/42.

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An important aspect of restoration ecology is the removal of non-native invasive plants. While restorations in urban areas involve similar challenges to restorations in rural areas, urban efforts also contend with unique issues such as increased fragmentation and decreased seed sources for native species. This study examined efforts to eradicate Ligustrum sinense and allow native vegetation to occupy the landscape. The herbaceous layer was inventoried at study plots in riparian bottomlands of four Atlanta, Georgia, natural areas two years after start of treatment to remove L. sinense. Plant ta

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31

Salie, K. (Khalid). "The contribution of riparian vegetation to the species composition of the Jonkershoek Valley in Stellenbosch, South Africa." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/49790.

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Thesis (MSc)--University of Stellenbosch, 2003.<br>ENGLISH ABSTRACT: Many authors express the value of riparian vegetation in terms of the function and number of species per unit area. Although riparian vegetation is confined to narrow bands of plants along watercourses, kloofs and gullies, it is a specialised habitat for many species. To determine the contribution of riparian vegetation to the species richness of the Jonkershoek Valley, Western Cape Province, South Africa, a checklist was compiled, by referring to past research and to the PRECIS national database for the South African f

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Garcia, António de Aragão Cravo. "Enrelvamento no olival - efeito da rega no crescimento vegetativo, na produção e na qualidade do azeite." Master's thesis, ISA/UTL, 2011. http://hdl.handle.net/10400.5/4482.

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Mestrado em Engenharia Agronómica - Hortofruticultura e Viticultura - Instituto Superior de Agronomia<br>The effect of deficit irrigation (10% ETc) on olive tree growth, production, oil quality and natural vegetation from a traditional olive grove, with natural cover crop between rows, in southern Portugal, was assessed during 2010/2011. The diversity of natural vegetation and the influence of irrigation in the present species were low. The most plant species were annuals. Significant differences on the vegetative growth between treatments were not found. Nevertheless, the number of frui

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Keith, Robin P. "Characterizing fire regimes from understory vegetation composition in ponderosa pine dominated forests of the northern Colorado Front Range." Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1448679.

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Langdon, Stephen Fife. "Vegetation composition and structure of a large boreal peatland complex in the western Adirondacks of New York State." Thesis, State University of New York Col. of Environmental Science & Forestry, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1585740.

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<p> Large boreal peatland complexes are at the southern extent of their range in New York State and contribute considerably to regional biodiversity with their distinctive flora and fauna. The goal of this study is to inform conservation management of peatland ecosystems by providing information on the composition and structure of vegetation across environmental gradients; information that is lacking for the region. I sampled vegetation along gradients of water chemistry, canopy openness, microtopography, coarse woody debris and forest structure in 50 plots within a large boreal peatland compl

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Navarra, Jennifer J. "Species composition and spatiotemporal pattern of the seed bank and vegetation in native and degraded Florida rosemary scrub." Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4645.

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Due to large pulses of recruitment immediately after fire and population decline with time-since-fire, I predicted seed density with time-since-fire would follow a unimodal function with low density in early and late years post-fire, and highest density at intermediate time-since-fire. I compared seed density data among sites with different time-since-fire: two sites each of three, six, ten and 24 years time-since-fire and three long-unburned sites (greather than]24 years). Variability in seed bank composition and density increased with time-since-fire and only recently burned stands were dist

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Conley, Gary D. "Examining the Cover and Composition of the Successional Vegetation Mosaic of Pre-SMCRA Mined Landscapes in Southeast Ohio." Ohio University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1357751096.

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Roux, Francis Augustus. "The influence of the composition of mixed Karoo vegetation on the grazing habits of Merino and Dorper wethers." Thesis, Rhodes University, 1994. http://hdl.handle.net/10962/d1003792.

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The primary objective of this research project was to determine whether area-selective grazing, by Dorper and Merino wethers, took place in small grazing camps as governed by differences in vegetal cover. The main research techniques employed were the descending-point method for the determination of botanical composition, sub-division of the camps into gridblocks to trace sheep movement in relation to vegetation patterning, fistulated animals to determine diet selection, the electronic theodolite for micro-topography, and few minor techniques. The result have shown that area- patch- and specie

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Cavalcanti, Guadalupe Gatto Lockaby Bruce Graeme. "Effects of sediment deposition in aboveground net primary productivity, vegetation composition, structure, and fine root dynamics in riparian forests." Auburn, Ala, 2004. http://repo.lib.auburn.edu/EtdRoot/2004/SPRING/Forestry_and_Wildlife_Sciences/Thesis/CAVALCANTI_GUADALUPE_18.pdf.

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Hao, Yushan. "Characterization of Peat Bog CO2 and CH4 Production Potentials in relation to Peat Physico-chemical Properties and Vegetation Composition." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1562338709421684.

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Day, Nicola J. "Two decades of vegetation change across tussock grasslands in New Zealand's South Island." Master's thesis, Lincoln University. Bio-Protection and Ecology Division, 2008. http://theses.lincoln.ac.nz/public/adt-NZLIU20080304.145252/.

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New Zealand's South Island tussock grasslands have been highly modified by human activities, including burning, grazing and introductions of exotic plants for pastoralism. Studies suggest that tussock grasslands are degraded, in that native species have declined, and exotic species have increased in both diversity and abundance. These trends are primarily thought to be related to the impacts of grazing and subsequent grazing removal. Few studies have assessed long-term changes that have occurred in tussock grasslands, and those that have are generally limited to one particular location. This t

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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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Karlík, Petr [Verfasser], and Peter [Akademischer Betreuer] Poschlod. "How is the age of an anthropogenic habitat - calcareous grasslands - affecting the occurrence of plant species and vegetation composition - a historical, vegetation and habitat ecological analysis. / Petr Karlík ; Betreuer: Peter Poschlod." Regensburg : Universitätsbibliothek Regensburg, 2019. http://d-nb.info/1200209036/34.

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Rensink, Cade Brion. "Impacts of patch-burn grazing on livestock and vegetation in the tallgrass prairie." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/2328.

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Sheldon-Sayer, Lynne. "The vegetation of Maud Island, Marlborough, New Zealand." Lincoln University, 2006. http://hdl.handle.net/10182/1707.

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Maud Island (Te Hoiere - "a long paddle or mighty pull") is a moderately sized island of 309 hectares, located in the Pelorus Sound (41°, 02 'S, 173° 54 'E) Marlborough, at the north-east end of the South Island of New Zealand. It has a long history of human modification and impacts since its colonisation by Maori and early Europeans. The vegetation of Maud Island has been studied in the 1980's and again in the early 1990's. The objectives of this study were to (1) describe how the vascular plant communities vary in species composition across Maud Island, (2) determine which environmental fact

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Luckeydoo, Lee Marie. "Vegetation and algal community composition and development of three constructed wetlands receiving agricultural runoff and subsurface drainage, 1998 to 2001 /." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486459267518713.

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Amat, Martínez Beatriz. "Dynamics of woody vegetation patches in semiarid ecosystems in the southeast of Iberian Peninsula." Doctoral thesis, Universidad de Alicante, 2015. http://hdl.handle.net/10045/50210.

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Aigbavbiere, Ernest. "How does predation from fish influence the benthic invertebrates’ species composition in the Phragmites australis and Chara vegetation of Lake Takern?" Thesis, Linköpings universitet, Ekologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-72643.

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Predation is one of the important selective factors that regulate the species composition of benthic invertebrate communities. The study objective was to investigate the invertebrate distribution in two contrasting habitats in Lake Takern, southern Sweden, submerged Chara vegetation and emergent Phragmites australis vegetation, and to investigate the influence of predation from fish on certain invertebrates. Laboratory studies were used to estimate handling time and the intake rate (mg/sec) by the fish based on the optimal foraging model. In the field, fish and invertebrates were collected wit

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Jenkins, Emily Poynter. "Assessment of nitrogen status and vegetation composition in tidal freshwater marshes using partial least squares regression models of hyperspectral canopy reflectance." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/3533.

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Thesis (M.S.) -- University of Maryland, College Park, 2006.<br>Thesis research directed by: Fischell Dept. of Bioengineering . Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Parkhurst, Tina. "Is tree planting enough? Investigation of soil condition and composition of vegetation and invertebrate assemblages after ecological restoration in agricultural landscapes." Thesis, Parkhurst, Tina (2021) Is tree planting enough? Investigation of soil condition and composition of vegetation and invertebrate assemblages after ecological restoration in agricultural landscapes. PhD thesis, Murdoch University, 2021. https://researchrepository.murdoch.edu.au/id/eprint/63209/.

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Globally, vegetation clearing for agriculture continues to cause biodiversity loss and land degradation. Restoration efforts to increase biodiversity and remediate land degradation are often constrained by legacies of agricultural land-use. Active restoration is often needed to overcome abiotic and biotic thresholds to assist re-assembly towards a reference ecosystem. My thesis explores the effects of active restoration on soil condition and re-assembly of plant and invertebrate communities. I coupled a global meta-analysis with a field survey and experimentation in the Western Australian w

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Pendergast, Mary E. "Community Level Effects of Vegetation Architecture and Prey Availability: A Study of Ground-dwelling Arthropods in a Shrub-steppe Ecosystem." DigitalCommons@USU, 2011. https://digitalcommons.usu.edu/etd/1013.

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Changes to vegetation architecture within a natural habitat can have profound impacts upon ecological community function, but the relative influence of vegetation architecture itself and potential indirect influences of associated food resources are often difficult to disentangle. I present the results of a three-year study designed to address the community level impacts of changes in big sagebrush (Artemisia tridentata) architecture and associated prey availability upon the ground-dwelling arthropod community. Three experimental sagebrush architecture treatments (low, intermediate, and high f

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