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Dissertations / Theses on the topic 'Species richness and composition'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

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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2

Nielsen, Uffe Nygaard. "Influences on species richness and composition of belowground communities at multiple spatial scales." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2008. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=24811.

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3

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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4

Dudziak, Sarah Kathleen. "BOUNDARY DYNAMICS AND MATRIX EFFECTS ON BEETLE COMMUNITY COMPOSITION AND MOVEMENT BETWEEN FORESTS AND AGRICULTURE." Miami University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=miami1188320501.

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5

Karns, Rachael Cassandra. "Microbial Community Richness Distinguishes Shark Species Microbiomes in South Florida." NSUWorks, 2017. http://nsuworks.nova.edu/occ_stuetd/453.

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The microbiome (microbial community) of individuals is crucial when characterizing and understanding processes that are required for organism function and survival. Microbial organisms, which make up an individual’s microbiome, can be linked to disease or function of the host organism. In humans, individuals differ substantially in their microbiome compositions in various areas of the body. The cause of much of the composition diversity is yet unexplained, however, it is speculated that habitat, diet, and early exposure to microbes could be altering the microbiomes of individuals (Human Microb

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6

Carlsson, Diane H. "Species diversity, richness and composition in jack pine communities after wildfire or clear-cut logging disturbance." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ61250.pdf.

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7

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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8

Simões, Catarina Cordeiro. "Species richness and composition of butterfly assemblages (Lepidoptera:Rhopalocera) along the altitudinal gradient of Serra da Estrela." Master's thesis, Universidade de Évora, 2016. http://hdl.handle.net/10174/20707.

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Os gradientes altitudinais são importantes modelos em ecologia pois permitem, numa escala reduzida, estudar a influência da variação de diversas variáveis ambientais nos padrões de biodiversidade existentes. Estes padrões são influenciados por diversos factores, desde variáveis climáticas às relacionadas com a perturbação humana. Nesta tese é estudada a variação na composição das comunidades de borboletas ao longo do gradiente altitudinal na Serra da Estrela e são testadas duas hipóteses sobre os padrões de riqueza específica ao longo do gradiente altitudinal: a regra de Rapoport e o “Mid Doma

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9

Steinbauer, Manuel [Verfasser], and Carl [Akademischer Betreuer] Beierkuhnlein. "The Effect of Spatial and Environmental Drivers on Patterns in Species Richness and Composition / Manuel Steinbauer. Betreuer: Carl Beierkuhnlein." Bayreuth : Universität Bayreuth, 2013. http://d-nb.info/1059352915/34.

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10

Sun, Junyao. "Multi-scale effects of hydrological and landscape variables on macrophyte richness and composition in British lakes." Thesis, University of Stirling, 2016. http://hdl.handle.net/1893/25489.

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Macrophytes are an integral component of lake littoral zones and play an irreplaceable role in maintaining the ecological balance of wetlands. Recent research has highlighted the role of lake-scale environmental factors (or “filters”) and catchment- and/or landscape-scale processes in explaining variation in macrophyte communities across different scales. In this work, the effects of land-use and connectivity on macrophyte communities were explored at two contrasting spatial scales (i.e. local catchment scale and topographic catchment scale). At the local catchment scale, the results revealed

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11

Aksamit, Dawn N. "Exotic Invasive Plants on Private Woodlands of Virginia: Effects on forest composition, structure, and wildlife habitat." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/30975.

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Exotic invasive plants have become a significant issue in the Southeastern United States for private landowners. These plants possess characteristics that allow for rapid growth and easy adaptation to many growing conditions, often outcompeting native vegetation and altering wildlife habitat, especially in disturbed areas. Disturbance, including access roads, trails, harvest sites, powerline corridors, and fence rows, is common on private land. Private landowners are often left to combat these problems without many monetary or expertise resources that are available to federal lands. Three

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12

Larouche, Martine. "Effects of past land use and landscape context on plant species composition and richness in woodlots of an agricultural landscape in Québec." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=119667.

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The forest transition occurring in developed countries, including northeastern North America and western Europe, led to an emergence of secondary forests that fueled research about past land-use legacies on biodiversity. Past land-use has been shown to lower plant species richness, especially that of forest herb species. A few studies have also considered landscape configuration around secondary forests, either in the present-day or during the early period of old field colonization. My study examines the effects of both past land-use and past landscape context on species composition and richne

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13

Galin, Isolde. "How former arable fields with permanent grazing differ from managed semi-natural pastures in Sweden." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-158072.

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New farming needs and innovations have, over time, led to changes in land use. Arable fields have been turned into pastures and semi-natural pastures into arable fields. Due to the ecological value of continually grazed semi-natural pastures in Sweden the aim of this study is to find out how former arable fields that are permanently grazed differ from semi-natural pastures. In this study I selected appropriate semi-natural pastures from a national monitoring program on seminatural- pastures and meadows. Plots continuously grazed were compared with grazed plots on former arable fields. Pair-wis

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14

Heimann, Juliane [Verfasser], Wolfgang W. [Akademischer Betreuer] Weisser, Günter [Akademischer Betreuer] Köhler, and Klaus [Akademischer Betreuer] Reinhold. "Generalist insect herbivore performance in dependence of plant species richness, composition and quality / Juliane Heimann. Gutachter: Wolfgang W. Weisser ; Günter Köhler ; Klaus Reinhold." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2012. http://d-nb.info/1028799012/34.

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15

Nascimbene, Juri. "Lichens as indicators of ecological continuity in subalpine forests case studies in the Paneveggio Forest (NE Italy)." Doctoral thesis, Università degli studi di Trieste, 2008. http://hdl.handle.net/10077/2656.

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2006/2007<br>In the Italian Alps subalpine forests are still intensively managed for timber production. The increasing interest on near-to-nature silvicolture has favoured a scientific-based and multi-purpose management approach whose models are often developed on the basis of ecological studies in the remnant near-natural sites. This could apply also to lichens, whose role in biodiversity conservation in subalpine coniferous forests of the Italian Alps is still largely unknown. Thus, testing the relations between tree parameters, the availability of different types of Coarse Woody Debris (CWD

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16

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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17

Hamilton, Bryan T. "Small Mammals in portions of Great Basin National Park Susceptible to Groundwater Withdrawal: Diversity and Stable Isotope Perspectives." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1705.

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To support population growth in Las Vegas, Nevada, large scale increases in groundwater pumping are planned across the state. This pumping could affect riparian areas in Great Basin National Park by lowering groundwater levels, reducing stream flows, and xerifying riparian vegetation. Great Basin National Park (GBNP) is mandated to manage its resources unimpaired for future generations. Loss of biodiversity is unacceptable under this mandate. If groundwater levels are reduced beyond a threshold, aquatic and riparian diversity would be lost, but the effects on small mammal communities are less

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18

Martins, Fernanda Alves. "Determinantes da diversidade de odonata no Brasil: uma abordagem em diferentes escalas espaciais." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/5933.

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Luza, André Luís. "Estrutura taxonômica, filogenética e funcional de metacomunidades de pequenos mamíferos não-voadores de ecótonos campo-floresta no sul do Brasil." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/84946.

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Ecótonos campo-floresta no sul do Brasil são originados pela expansão de ecossistemas florestais sobre os campestres, um processo natural gerado por mudanças climáticas de larga escala espacial e temporal. Este processo provoca mudanças vegetacionais que consequentemente modificam os padrões de distribuição, composição e riqueza faunística. Assim, ecótonos campo-floresta são sistemas adequados para inferir sobre a influência de processos históricos, biogeográficos e ecológicos na estruturação de comunidades. Para respondermos questões relacionadas a processos agindo em diferentes escalas espac

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20

Gudrunsson, Mikael. "Forest fire drives long-term community changes of wood-decaying fungi in a boreal forest archipelago." Thesis, Mittuniversitetet, Avdelningen för naturvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-24241.

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Conservation of wood-decaying fungi requires improved knowledge about the long-term effects of forest management; regarding habitat loss, fragmentation and fire suppression. To better understand such effects, I examined the influence of area, isolation, fire history and forest stand characteristics on communities of wood-decaying fungi. Species richness and composition were studied along a gradient of 22 forested islands varying in size (0.16 to 17.58 ha) and fire history (spanning 5000 years) in a boreal forest archipelago in northern Sweden. A total of 490 records of 41 polypore species were

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21

Lilley, Patrick Ledford. "Determinants of native and exotic plant species diversity and composition in remnant oak savannas on southeastern Vancouver Island." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/243.

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Many regional and local factors can influence the distribution of native and exotic species in ecological communities. I examined the regional- and local-scale determinants of native and exotic vascular plant species richness and composition in a highly fragmented oak savanna ecosystem on southeastern Vancouver Island. In sharp contrast to most reported results, I found a negative relationship between native and exotic richness at the regional scale, and no relationship at the local scale. Two extrinsic factors, surrounding road density and climate, best explained the regional-scale relationsh

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22

Cardoso, Danon Clemes. "Determinantes de comunidades de formigas em restinga." Universidade Federal de Viçosa, 2009. http://locus.ufv.br/handle/123456789/3890.

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Made available in DSpace on 2015-03-26T13:30:25Z (GMT). No. of bitstreams: 1 texto completo.pdf: 1105450 bytes, checksum: 163c50636e0eaab0ec624fc7342a1a43 (MD5) Previous issue date: 2009-07-23<br>Fundação de Amparo a Pesquisa do Estado de Minas Gerais<br>The Brazilian coast presents approximately 9,200 kilometers, which 5.000 km of them are occupied by the Restinga ecosystems. This ecosystem is a set of vegetation formations that develop in sandy plains dating from the Quaternary, within the Atlantic Forest domain. The plant species that occur in Restinga have high plasticity, presenting ada

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23

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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24

Fazekas, Kuyer Josiah Jr. "Effects of Coral Reef Habitat Complexity on the Community Composition and Trophic Structure of Marine Fish Assemblages in Indonesia’s Wakatobi Marine National Park." Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1567514980264114.

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25

Silva, Jeanne dos Reis. "A influência de fatores ambientais na riqueza e composição da micota liquenizada em área de brejo de altitude e caatinga." Universidade Federal de Sergipe, 2015. https://ri.ufs.br/handle/riufs/4431.

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Lichens are the result of an symbiotic interaction between fungus, the mycobiont, and one or more photosynthetic components, the photobionts, which can be a green algae and/or a cyanobacteria. This study aimed to compare the species richness and composition of corticolous crustose lichens in two forest types, Caatinga and Brejo de Altitude, in relation to the influence of biotic and abiotic parameters such as light, bark pH and diameter at breast height (DBH) of the host, and elevation. To collect the lichens two transects of 300 m each were delimited, one per site. Along these transects, samp

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26

Ribeiro, Taíse Colpo. "DIVERSIDADE DE FORMIGAS (HYMENOPTERA: FORMICIDAE) DE FRAGMENTOS FLORESTAIS EM SANTA MARIA, RIO GRANDE DO SUL, BRASIL." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/5277.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Ants belong to a hyperdiverse social insect group with many species used as ecological indicators of their habitat conditions. This study aims to analyze richness, species composition, diversity, evenness, and environmental variables associated to leaf-litter ant fauna of eight forest fragments in the municipality of Santa Maria, Central Depression region of Rio Grande do Sul State, Brazil. The sampling followed standard protocol through a 200-m transect placement by fragment. In order to proceed statistical analyses, the fragments

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Silva, Talita Ariela Sampaio e. "Exploração de Euterpe edulis Mart. (Arecaceae): efeitos sobre a estrutura de comunidades vegetais." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/1856.

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Made available in DSpace on 2016-06-02T19:30:13Z (GMT). No. of bitstreams: 1 6775.pdf: 3213380 bytes, checksum: 36de81e56297427d70c405207779962f (MD5) Previous issue date: 2015-02-27<br>Universidade Federal de Sao Carlos<br>The harvesting of non-timber forest products (NTFPs) has been considered as a low-impact activity. However, the increasing demand of these products made greater the exploitation, which may cause depletion of resources in Nature. Euterpe edulis Mart. (Arecaceae) is one of the most studied plant species in Brazil, because it is economically important, listed among the most

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28

Ivanov, Kaloyan. "EFFECTS OF FOREST EDGES, EXOTIC ANTS AND NONNATIVE PLANTS ON LOCAL ANT (HYMENOPTERA: FORMICIDAE) DIVERSITY IN URBAN FOREST FRAGMENTS OF NORTHEASTERN OHIO." Cleveland State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=csu1295481568.

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29

Bowen, Katie. "Connectivity of Coastal and Oceanic Ecosystems: Pelagic Habitat Use by Juvenile Reef Fishes in the Gulf of Mexico." NSUWorks, 2015. http://nsuworks.nova.edu/occ_stuetd/394.

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The assemblage structure, abundance, biomass, and vertical distribution of juvenile reef fishes in the offshore pelagic habitat of the northern Gulf of Mexico are described as part of the NOAA-supported Offshore Nekton Sampling and Analysis Program. The results presented here are from a 3-month, continuous sampling series in 2011 in which discrete depth strata from 0 to 1500 m were sampled using a 10-m2 MOCNESS midwater trawl. This is the first study to examine pelagic juvenile reef fish distributions across the entire oceanic northern Gulf of Mexico seaward of the continental shelf break afte

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Dainese, Matteo. "Classification and biodiversity patterns in pastures of province of Trento." Doctoral thesis, Università degli studi di Padova, 2010. http://hdl.handle.net/11577/3421544.

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In the Italian Alps, summer pastures are still managed in traditional ways, which maintain important grassland habitats of many species, although the number of pastures has declined drastically over the past few decades. Research on alpine pastures is important in many respects. From the aspect of nature protection, pastures represent a habitat for numerous plant and animal species; and, through their diversity, contribute greatly to the biodiversity and scenic value of the area. From the economic standpoint, grasslands are a source of feed for stock, a habitat for medicinal and melliferous pl

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Pattison, Zarah. "Effects of invasive alien plants on riparian vegetation and their response to environmental factors." Thesis, University of Stirling, 2016. http://hdl.handle.net/1893/25404.

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Biological invasions are reportedly one of the major contributory factors to biodiversity loss worldwide. The impacts of invasive alien plant (IAP) species on native communities are widely documented in the scientific literature, however, there is still a lack of detailed information on their impacts within the most vulnerable habitats. Riparian habitats are highly dynamic systems and naturally disturbed, making them particularly vulnerable to invasion. Climate change, directly or indirectly, is also predicted to adversely impact river systems, which may subsequently alter invasion rates and t

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32

Coiffait-Gombault, Clémentine. "Règles d’assemblages et restauration écologique des communautés végétales herbacées méditerranéennes : le cas de la Plaine de La Crau (Bouches-du-Rhône, France)." Thesis, Avignon, 2011. http://www.theses.fr/2011AVIG0322/document.

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Les écosystèmes herbacés méditerranéens, caractérisés par une importante biodiversité, ont subi de considérables changements d‟usage. Désormais, leur conservation est devenue insuffisante au regard de l‟augmentation des dommages causés par les activités humaines. La restauration écologique apparaît donc comme un outil approprié pour participer à leur préservation. Des recherches préalables sur les différents compartiments de l‟écosystème ainsi que sur les facteurs responsables de l‟assemblage de leurs communautés avant et après dégradations sont donc nécessaires afin de mettre en place des mét

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Affeld, Kathrin. "Spatial complexity and microclimatic responses of epiphyte communities and their invertebrate fauna in the canopy of northern rata (Metrosideros robusta A. Cunn.: Myrtaceae) on the West Coast of the South Island, New Zealand." Diss., Lincoln University, 2008. http://hdl.handle.net/10182/771.

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Rain forest canopies are renowned for their very high biodiversity and the critical role they play in key ecological processes and their influence on global climate. Despite that New Zealand supports one of the most diverse and extensive epiphyte flora of any temperate forest system, few studies have investigated epiphyte communities and their invertebrate fauna along with factors that influence their distribution and composition. This thesis represents the first comprehensive study of entire epiphyte communities and their resident invertebrate fauna in the canopy of New Zealand’s indigenous f

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Norris, Beth J. "Species richness estimation for benthic data." Thesis, University of Kent, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.593918.

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This thesis addresses species richness estimation for benthic data by describing the clustering of individuals within a species using a Neyman Type A distribution, and incorporating this into species richness estimates. A review of current species richness estimation methods is included . The maximumlikelihood approach to species richness estimation is extended to incorporate the Neyman Type A model, with a gamma mixing distribution on the mean abundance of individuals within a species. Species richness estimates of this model are compared •1 to those of the simpler negative binomial and Poiss

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35

Hecnar, Stephen J. "Species richness, species turnover, and spatial dynamics of amphibian communities." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0006/NQ30275.pdf.

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Srivastava, Diane Sheila. "Ecological evolutionary limits of local species richness." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244120.

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Vonlanthen, Corinne Maria. "Alpine plant communities : ecology and species richness /." [S.l.] : [s.n.], 2005. http://www.zb.unibe.ch/download/eldiss/05vonlanthen_c.pdf.

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Van, Reeth Colin. "Influences de l’organisation du paysage sur l’abondance des abeilles sauvages, leur diversité et le service de pollinisation en prairie permanente." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0311/document.

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Les abeilles sauvages (20 000 espèces à travers le monde) participent à la pollinisation de 87,5% des espèces de plantes. Le récent déclin des abeilles sauvages en Europe met en péril la viabilité du service de pollinisation. Parmi les causes de ce déclin, la diminution des surfaces d’habitats semi-naturels (e.g. les prairies permanentes), fournissant aux abeilles sauvages des ressources floristiques diversifiées, joue un rôle particulièrement important. En parallèle de cette diminution des habitats semi-naturels qui s’est opérée depuis la seconde moitié du 20ème siècle, on observe sur la même

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Hager, Heather Anne. "Conservation of species richness, are all umbrella species of similar quality?" Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ27503.pdf.

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Downer, Monica Ruth. "Plant Species Richness and Species Area Relationships in a Florida Sandhill." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4030.

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Pine sandhill are integral pyrogenic communities in the southeastern United States. Though once widespread, habitat destruction, fire suppression and fragmentation have reduced the population to nearly 3%. It is important to learn as much as possible about these unique areas in order to implement best management practices to conserve and restore the existing populations of these communities. Fire is central to the maintenance of pine sandhill communities and two conceptual hypothesis regarding burn frequency have come to light in maintaining the unique species composition and richness of these

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Nyberg, Kruys Åsa. "Phylogenetic relationships and species richness of coprophilous ascomycetes." Doctoral thesis, Umeå University, Ecology and Environmental Science, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-625.

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<p>Coprophilous ascomycetes are a diverse group of saprobes, of which many belong to three families, Delitschiaceae, Phaeotrichaceae and Sporormiaceae, within the large order Pleosporales. The natural relationships and circumscription of these families are unclear, especially within the family Sporormiaceae, where the generic delimitation have been questioned. There is also a need to understand how different ecological processes affect species richness and occurrence of coprophilous ascomycetes in general. The aim of this thesis was therefore to test earlier classifications of coprophilous tax

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Dupré, Cecilia. "Regional and local variation in plant species richness." Doctoral thesis, Uppsala universitet, Institutionen för evolutionsbiologi, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-691.

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In this thesis, I examine the variation in plant species richness along gradients of productivity and disturbance in grasslands and forest habitats in southern Sweden, and I compare the documented patterns with theoretical predictions. Moreover, I evaluate the relative importance of habitat quality and habitat configuration for the occurrence of field layer species in deciduous forests. Finally, I present a new method for the determination of the regional species pool. To examine regional and local variation in plant species richness, I gathered data on species composition in plots of differen

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Nyberg, Kruys Åsa. "Phylogenetic relationships and species richness of coprophilous ascomycetes /." Umeå : Univ, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-625.

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Dupré, Cecilia. "Regional and local variation in plant species richness /." Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2001. http://publications.uu.se/theses/91-554-5064-4/.

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Orme, Christopher David L'Estrange. "Body-size and macroevolutionary patterns of species richness." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398022.

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Harral, Josephine Erica. "Experiments on resource availability and plant species richness." Thesis, Imperial College London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415053.

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Steinmann, Katharina. "Testing basic assumptions of species richness hypotheses using plant species distribution data /." Zürich, 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000254735.

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Giles, Mark. "Patterns of Species Rarity as a Driving Mechanism for Species Richness Gradients." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40587.

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Broad scale geographic variation in species diversity correlates with environmental variables in most taxa, but a mechanistic understanding of this relationship has remained elusive. More than a half-century ago, F.W. Preston observed that the number of individuals per species in species assemblages is log-normally distributed (with two parameters: the total number of individuals, I, and the number of individuals of the rarest species, m). Here, we show that ϕ, a proxy for m, is correlated with environmental variables in several datasets of trees, birds, fish, and invertebrates. Moreover, vari

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Steck, Claude Eugen. "Conservation of grasshopper species richness in a changing landscape." kostenfrei, 2007. http://e-collection.ethbib.ethz.ch/view/eth:29787.

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Nicolakakis, Nektaria. "Innovation rate, brain size and species richness in birds." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31280.

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The number of species varies greatly among taxa. In birds, for example, the parvorder Passerida contains 3556 species while the Odontophorida (New World Quails) contains only six species. This uneven distribution of species among avian taxa is not random and therefore warrants an explanation. The behavioral drive hypothesis stipulates that the capacity for innovation, coupled with the rapid transmission of the behavioral novelty to conspecifics, may expose individuals to new selective pressures and help fix mutations that would otherwise not be expressed. This should lead to accelerated rates

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