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Dissertations / Theses on the topic 'Forest and grassland ecology'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Lowman, Guy Russell Pollock. "Deposition of nitrogen to grassland versus forested areas in the vicinity of sabie, Mpumalanga, South Africa." Thesis, University of the Witwatersrand, 2003. http://hdl.handle.net/10539/20112.

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Nitrogen deposition to adjacent grassland and forested areas in the vicinity of Sabie, Mpumalanga, South Africa was studied. Total deposition amounts to the forested area are calculated to be 7l.2 kg N ha-1 yr1 and to the grassland area, 25 kg N ha· 1 yr1. The average deposition amounts are similar to or at least approach nitrogen mineralisation amounts at nearby sites of 50-70 kg N ha-1 yr1. The deposition amounts are made up of 21.4 kg N ha-1 yr1 dry deposition, 7.8 kg N ha-1 yr1 wet deposition and 42 kg N ha-1 yr1 cloud droplet deposition for the forest. For the grassland, the amounts

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2

McDonald, M. Christine. "Ecosystem resilience and the restoration of damaged plant communities : a discussion focusing on Australian case studies /." View thesis, 1996. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030625.095246/index.html.

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3

McDonald, M. Christine. "Ecosystem resilience and the restoration of damaged plant communities : a discussion focusing on Australian case studies." Thesis, View thesis, 1996. http://hdl.handle.net/1959.7/uws:683.

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An examination was undertaken of the literature and restoration cases for 4 major Australian vegetation types (sclerophyll; rainforest; grassland; and wetland) to explore the proposition that ecological resilience may govern recovery after anthropogenic damage, and/or provide a fundamental guide and measure of success for ecological restoration. Also, primary data were collected from highly degraded sites (5 sclerophyll, 3 rainforest, and 4 grassy sites) to assess recovery after restoration treatment. These were supplemented with questionnaire data from practitioners working at a wider range o

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4

Whiteside, Elizabeth Ann. "The effects of broad-leaved trees on the associated biodiversity of improved grassland within silvopastoral systems." Thesis, Queen's University Belfast, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325967.

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5

Conver, Joshua. "Stochastic Fire Modeling of a Montane Grassland-Forest Landscape in the Valles Caldera National Preserve, New Mexico, USA." Thesis, The University of Arizona, 2011. http://hdl.handle.net/10150/217054.

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Montane ecosystems of the western United States have experienced dramatic changes in their fire regimes over the last 150 years. Fire behavior modeling enables understanding of how ecosystem changes have altered past fire regimes. The Valles Caldera National Preserve in the Jemez Mountains, northern New Mexico, contains one of the largest montane grasslands in North America. This area is used for multiple uses ranging from logging to grazing and recreation. These important ecosystems have experienced increased fuel loads and stem densities resulting from a century of fire exclusion and tree en

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6

McKinley, Duncan Crannell. "Consequences of conversion of native Mesic grassland to coniferous forest on soil processes and ecosystem C and N storage." Diss., Manhattan, Kan. : Kansas State University, 2006. http://hdl.handle.net/2097/253.

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7

Hobbs, Royden J. "Breeding biology and spatial relationships of desert grassland raptors and corvids." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/280613.

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Red-tailed hawks (Buteo jamaicensis), Swainson's hawks (Buteo swainsoni), great horned owls (Bubo virginiaus), and ravens (Covus corax and C. cryptoleucus) occur sympatrically in desert grasslands in Arizona. Desert grasslands have been invaded by trees since Anglo-American settlement. They may also be subject to greater human disturbance than historically, because of recent increases in illegal immigration along the U.S.-Mexico border. These changes may affect the abundance, diversity, competitive interactions, and reproductive success of raptors and corvids in desert grasslands. I studied r

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8

Joubert, Lize. "Biodiversity value of grassland ecological networks in afforested areas, KwaZulu-Natal, South Africa." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6465.

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Thesis (MSc)--University of Stellenbosch, 2011.<br>ENGLISH ABSTRACT: The current biodiversity crisis requires creative initiatives for mitigating further biodiversity loss. The use of ecological networks (ENs) is such an initiative. The South African forestry industry recognizes that there is loss of biodiversity at the smaller patch scale, while attempting to mitigate this loss at the landscape scale by implementing largescale ENs. The aim of this study was to determine how representative grassland biodiversity in ENs are of similar habitat in a nature reserves (NR). The study was condu

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9

Kirkpatrick, Christopher Kreitler. "Trends in grassland bird abundance following prescribed burning in southern Arizona." Thesis, The University of Arizona, 1999. http://hdl.handle.net/10150/278702.

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I examined trends in relative abundance and species richness of breeding and wintering grassland birds before (1996) and after (1997, 1998) a spring prescribed burn in a mesquite-dominated desert grassland at Buenos Aires National Wildlife Refuge, Arizona. The burn was moderate in intensity, patchy in extent, and affected ground cover more strongly than shrub cover, smaller shrubs more strongly than larger shrubs, and killed 1% of velvet mesquite (Prosopis velutina). Species richness of breeding birds decreased in the first year post-burn. Of breeding species, black-throated sparrows (Amphispi

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10

Koenen, Kiana Kathleen-Gaye. "Seasonal densities and habitat use of desert mule deer in a semidesert grassland." Thesis, The University of Arizona, 1999. http://hdl.handle.net/10150/278709.

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I determined density and habitat use of desert mule deer (Odocoileus hemionus crooki) on the Buenos Aires National Wildlife Refuge, a semidesert grassland in southeastern Arizona, in 1996. I observed 219 groups of deer; densities varied from 0.9 ± 0.3 (SE) deer/km² in summer to 2.5 ± 1.3 in winter. Herd size varied from 1.5 ± 0.1 deer/group in summer to 9.7 ± 2.0 in winter. Density of females was greater than males (0.9 ± 0.3 and 0.03 ± 0.04, respectively). Mule deer used subshrub-grass more in summer (χ² = 54.8, 6 df, P < 0.0001) and Russian thistle (Sallsola kali) less and cactus more in au

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11

Biswas, Tanushree. "A Spatio-Temporal Analysis of Landscape Change within the Eastern Terai, India : Linking Grassland and Forest Loss to Change in River Course and Land Use." DigitalCommons@USU, 2010. http://digitalcommons.usu.edu/etd/610.

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Land degradation is one of the most important drivers of landscape change around the globe. This dissertation examines land use-land cover change within a mosaic landscape in Eastern Terai, India, and shows evidence of anthropogenic factors contributing to landscape change. Land use and land cover change were examined within the Alipurduar Subdivision, a representative of the Eastern Terai landscape and the Jaldapara Wildlife Sanctuary, a protected area nested within Alipurduar through the use of multi-temporal satellite data over the past 28 years (1978 - 2006). This study establishes the p

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12

Jeffs, Christopher. "Natural enemies and the diversity of plant communities." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:49c80db9-6590-4e06-b86f-24d225046969.

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The processes that determine the structure of plant communities are of considerable practical and theoretical interest. Natural enemies such as herbivores, seed predators and pathogens provide one potentially important influence on plant diversity. I investigated the effects of natural enemies on plant diversity in two contrasting, species-rich plant communities (tropical forests in Panama and temperate grasslands in the UK), focusing on pre-dispersal seed predation by insects, and the mortality of seeds and seedlings caused by soil fungi. In Panama I found that pre-dispersal insect seed preda

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13

Ballas, John Peter II. "Understanding the multiple resource needs of leaf-cutter bees to inform pollinator conservation and the restoration of reclaimed mines." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1587416286314145.

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14

Guidi, Claudia. "Soil organic carbon responses to forest expansion on mountain grasslands." Doctoral thesis, country:DK, 2015. http://hdl.handle.net/10449/25091.

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Grassland abandonment followed by progressive forest expansion is the dominant land-use change in the European Alps. Contrasting trends in soil organic carbon (SOC) stocks have been reported for mountainous regions following forest expansion on grasslands. Moreover, its effects on SOC properties involved into long-term stability are largely unknown. The aim of this PhD thesis was to explore changes in: (i) SOC stocks; (ii) physical SOC fractions and their sensitivity to SOC changes; and (iii) labile carbon (C) in soil and fractions following forest expansion on mountain grasslands. A land-use

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15

Hadden, Susan A. "Composition and ecology of the flora and fauna of remnant native grasslands of the western basalt plains and northern plains of Victoria : implications for management on private property." Thesis, Federation University Australia, 1998. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/157195.

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"This thesis investigated a) the effects of the removal of grazing on the botanical composition, structure and biomass of two long-grazed species-rich grassland remnants, b) the habitat use and requirements of the ground-dwelling mammal, reptile and amphibian fauna and c) the composition, and abundance of the beetle, ant and spider assemblages."<br>Doctor of Philosophy

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16

Wang, Zhi-gang. "Comparative ecology of pauciennials in chalk grassland." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315978.

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17

Zaloumis, Nicholas Paul. "South African grassland ecology and its restoration." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/6629.

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The aim of this study is to investigate how human related disturbances affect mesic grasslands. I identified what was lost from the system after a disturbance and what biological constraints ecologists and managers will face when approaching their restoration. I then investigated biological limitations to grassland restoration by attempting species reintroduction into secondary grasslands and exploring the interaction between grasses and forbs.

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18

Baharith, Osama. "Ecological studies on some grassland Auchenorrhyncha." Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254616.

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19

Ismail, A. "Ecology and toxicology of arsenic in contaminated grassland." Thesis, University of Essex, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376741.

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20

Bunyan, Milind. "Edge effects in a forest-grassland mosaic in southern India." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0024634.

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21

Mello, Maeve Brito de. "Studies on the structure of grassland spider communities." Thesis, University of Sunderland, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241504.

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22

Bossenbroek, Jonathan Mark. "Spatial structure and scaling of beetle, bird and plant communities in North American grasslands." Access citation, abstract and download form; downloadable file 10.52 Mb, 2004. http://wwwlib.umi.com/dissertations/fullcit/3131657.

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23

Dalgleish, Harmony J. "Belowground bud banks as regulators of grassland dynamics." Diss., Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/312.

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24

Wright, Philip John. "Population ecology of Lasius flavius F. on chalk grassland." Thesis, Goldsmiths College (University of London), 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394318.

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Lasius flavus F. is a common ant species on chalk grasslands in the south of England. This thesis examines the effects of the management regimes and environmental conditions of these grasslands, on the characteristics of the ant populations. The null hypothesis of the study was that the characteristics of L. flavus populations are not significantly affected by variation in: 1) management procedures, 2) the physical environment, 3) the biological environment. The ant populations, management regimes and environmental characteristics of twenty sample areas were investigated and subjected to inten

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25

Herse, Mark Richard. "Landscape ecology of two species of declining grassland sparrows." Thesis, Kansas State University, 2017. http://hdl.handle.net/2097/35786.

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Master of Science<br>Department of Biology<br>Alice Boyle<br>Species extinctions over the past two centuries have mainly been caused by habitat destruction. Landscape change typically reduces habitat area, and can fragment contiguous habitat into remnant patches that are more subject to anthropogenic disturbance. Furthermore, changes in the landscape matrix and land-use intensification within remaining natural areas can reduce habitat quality and exacerbate the consequences of habitat loss and fragmentation. Accordingly, wildlife conservation requires an understanding of how landscape structur

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26

Turnbull, Lindsay Ann. "The role of spatial processes in a limestone grassland." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286743.

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27

Peet, Nicholas B. "Biodiversity and the management of tall grassland in Nepal." Thesis, University of East Anglia, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267318.

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28

Sankey, Temuulen Tsagaan. "20th Century forest-grassland ecotone shift and effects of livestock herbivory." Diss., Montana State University, 2005. http://etd.lib.montana.edu/etd/2005/sankey/SankeyT1205.pdf.

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29

Tolsma, Arn Douwe. "The Effects of fire and grazing on the energy reserves of resprouting plants in Victoria's alpine grasslands /." Connect to thesis, 2002. http://eprints.unimelb.edu.au/archive/00000331.

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30

Jones-Walters, Lawrence Merlin. "The management of chalk grassland for the conservation of invertebrates." Thesis, Birkbeck (University of London), 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.281807.

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31

Kell, Gladie Victoria. "Agro-environmental factors influencing leatherjacket (Diptera: Tipulidae) populations in grassland." Thesis, Queen's University Belfast, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356935.

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32

Pagnotta, Mario A. "The ecology and ecological genetics of pasture legumes in Syria." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292668.

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33

Lynas, P. "The ecology of skylarks Alauda arvensis in grassland dominated farmland." Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426765.

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34

Gordon, Caleb Edward. "Community ecology and management of wintering grassland sparrows in Arizona." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/283995.

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This dissertation presents a four year field study on the movement patterns, community dynamics, and management of granivorous wintering grassland sparrows in Arizona. Chapter one focuses on within winter, local scale movement patterns. Recapture statistics and radiotelemetry both showed strong interspecific differences in movement, consistent with the idea that these species may partition niche space according to the regional coexistence mechanism. Both techniques ranked species from most to least sedentary as follows: Cassin's and Grasshopper sparrows, Baird's, Vesper, and Savannah and Brewe

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35

Lindgren, Jessica. "Small remnant habitats : Important structures in fragmented landscapes." Doctoral thesis, Stockholms universitet, Institutionen för naturgeografi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-148653.

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The world-wide intensification of agriculture has led to a decline in species richness due to land use change, isolation, and fragmentation of natural and semi-natural habitats in agricultural and forestry landscapes. As a consequence, there is a current landscape management focus on the importance of green infrastructure to mitigate biodiversity decline and preserve ecosystem functions e.g. pollination services and pest control. Even though intensification in agriculture has been ongoing for several hundreds of years, remnant habitats from earlier management practices may still be remaining w

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36

Zhuang, Xue-ying. "Forest succession in Hong Kong /." [Hong Kong : University of Hong Kong], 1993. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13671716.

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37

Aplin, David. "The effects of temporal heterogeneity in nutrient supply on grassland species." Thesis, University of Sussex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249098.

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38

Pfeil, Erin. "Spatial and Temporal Dependent Shifts in Grassland Invasibility." Youngstown State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1289941507.

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39

Clarke, Ian Peter. "Recruitment dynamics in a southern calcareous grassland : effects of climate change." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300964.

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40

Mahdi, Abdul-Khaliq Saleh. "The plant ecology of limestone grassland community : spatial organization and coexistance." Thesis, University of Sheffield, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358966.

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41

Thomas, R. C. "The historical ecology of Bernwood Forest." Thesis, Oxford Brookes University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376569.

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42

Cosgrove, Peter John. "Bird communities of scarce forest habitats within spruce plantations in Kielder Forest." Thesis, University of Aberdeen, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309795.

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The aim of this study was to document the bird communities of six 'scarce forest habitats' in an upland spruce forest (Kielder, in Northumberland) and to compare them to the bird communities that were associated with its conifer plantations. Features of the scarce forest habitats considered to be important to their bird communities were investigated. The implications of these findings for future forest management are discussed, particularly in relation to the contributions these habitats make to the overall diversity of forest avifauna. Up to 76 study plots were selected randomly from six scar

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43

Welti, Ellen A. R. "Ecological networks of grassland plants and arthropods." Diss., Kansas State University, 2017. http://hdl.handle.net/2097/35284.

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Doctor of Philosophy<br>Division of Biology<br>Anthony Joern<br>John Blair<br>Ecological communities are comprised both of species and their interactions. The importance of species interactions is embraced by ecological network analysis, a framework used to identify non-random patterns in species interactions, and the consequences of these patterns for maintaining species diversity. Here, I investigated environmental drivers of the structure of plant-pollinator and plant-herbivore networks. Specifically, I asked: (1) Do global-scale climate gradients shape mutualistic and antagonistic networks

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44

Tofts, Richard James. "On the assembly of a grassland plant community." Thesis, n.p, 1998. http://oro.open.ac.uk/19787/.

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45

Krutsinger, Roxane. "Evaluation of Grassland Restoration Success in Illinois Using Indicators of Ecosystem Function." Thesis, Southern Illinois University at Edwardsville, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1556741.

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<p> Grasslands are known to have been an important ecosystem in the Illinois landscape prior to European settlement. They have been severely impacted by changes in land use such as the conversion of native grasslands to agricultural land for the production of crops and livestock. Grassland ecosystems are known to provide several essential ecosystem functions that are important for the maintenance of the ecosystem and for human survival. Some of the ecosystem functions associated with grasslands include: nutrient cycling, carbon sequestration, and the cleansing of environmental contaminants fro

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46

McLellan, Andrew John. "The plant ecology of a limestone grassland : competition and spatio-temporal dynamics." Thesis, University of York, 1995. http://etheses.whiterose.ac.uk/2448/.

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47

Martinez, Yrizar Angelina. "Above-ground productivity, nutrient dynamics and leaf characteristics in a chalk grassland." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279916.

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48

Lloyd, John David 1973. "Large-scale vegetation features affecting the distribution and abundance of grassland birds." Thesis, The University of Arizona, 1997. http://hdl.handle.net/10150/278602.

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I predicted the likely effects of fire on the abundance of grassland birds by determining which vegetal features influenced the distribution and abundance of grassland birds at the Buenos Aires National Wildlife Refuge, Arizona. Abundance of pyrrhuloxia (Cardinalis sinuatus) (r² = 0.363), Lucy's warbler (Vermivora luciae) (r² = 0.348), and total abundance of birds (r² = 0.358) was positively correlated with increasing density of mesquite (Prosopis velutina), whereas abundance of cactus wren (Campylorhynchus brunneicappillus) (r² = 0.452) was negatively correlated with increasing mesquite densi

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49

GATTI, RENATA. "Ecology and management of grassland in Umbria-Marches Apennine (central Italy)." Doctoral thesis, Università degli Studi di Camerino, 2009. http://hdl.handle.net/11581/401749.

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The grasslands, like the majority of the terrestrial systems, are complex ecosystems and such complexity comes from the high number of biotic and abiotic elements which form this systems and from the interactions between the same elements, which could vary in time and space their nature and intensity. Keeping attention to this complexity and knowing that there is an equilibrium state in which the plant community has the maximum possible number of species, for a certain soil-climate context, this research work is centred on the description of the components of the grassland ecosystem, of the re

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50

Slaviero, Antonio <1986&gt. "Ecology and conservation strategies of target dry grassland orchid species (Orchidaceae)." Doctoral thesis, Università Ca' Foscari Venezia, 2015. http://hdl.handle.net/10579/8345.

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A causa del loro elevato livello di specializzazione ecologica, le Orchidaceae sono specie altamente vulnerabili e minacciate a scala globale ma anche bioindicatori dello stato degli habitat in cui vivono. Al fine di salvaguardare la biodiversità si rende necessario un approccio conservativo basato sulla conoscenza dell’ecologia delle specie, degli habitat in cui vivono e dei rapporti con altri organismi. Questa tesi considera tre orchidee (A. morio; H. adriaticum, O. sphegodes) quali target di studio per comprendere quali fattori ecologici siano i driver della loro fitness in un habitat parti

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