Дисертації з теми "Ecology and Biodiversity"
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Figuerola, Balañá Blanca. "Biodiversity and Chemical ecology in Antarctic bryozoans = Biodiversitat i ecologia química de briozous antàrtics." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/129165.
Повний текст джерелаAquesta tesi cobreix dos aspectes importants i poc coneguts dels briozous antàrtics: la biodiversitat i l'ecologia química. L'anàlisi comparatiu de diversitat realitzat aquí (Capítol 1 i 2) entre l'Antàrtida i altres zones geogràficament properes recolzen la hipòtesi de la separació seqüencial de Gondwana. Es discuteix que l'elevat nombre d'espècies de la regió de la Patagònia argentina (PA) compartides amb l'Antàrtida qüestiona el grau real d'aïllament de l'Antàrtida en briozous queilostòmats. Els nostres estudis (Capítols 1 i 2) són també una de les primeres caracteritzacions de les comunitats de briozous, principalment del talús, de la regió de la PA, i de l' Oceà Austral, especialment el Mar de Weddell. Els nostres resultats remarquen la importància dels estudis taxonòmics en aquestes regions escassament explorades, incloent un gran nombre de nous gèneres i espècies, i noves cites. Entre les noves espècies trobades en el nostre estudi, es descriu un briozou del gènere Reteporella caracteritzat per una rara aviculària esfèrica i gegant, portant-nos a reconsiderar quines són les possibles funcions de l'aviculària (Capítol 3). Com les comunitats estudiades de briozous, per sota de les zones afectades per pertorbacions locals (erosió per icebergs), estan subjectes principalment a factors biòtics com la competència i la depredació, l'evolució ha afavorit el desenvolupament de mecanismes químics de protecció (Capítols 4 i 5). Els nostres estudis són dels primers en ecologia química de briozous antàrtics. Els nostres resultats demostren la importància de diversos mecanismes d'ecologia química contra la competència i la depredació en briozous antàrtics. La majoria de les espècies de briozous mostraven activitat citotòxica i/o repel•lent contra l'eriçó de mar Sterechinus neumayeri i l'amfípode Cheirimedon femoratus, respectivament (Capítol 4). En el capítol 5, totes les espècies de briozous estudiats mostraven activitat de repel•lència alimentària contra almenys un dels dos depredadors abundants considerats, l'estrella de mar Odontaster validus i l'amfípode Cheirimedon femoratus. La tendència general en el nostre estudi indica la possessió d'una combinació de mecanismes físics i químics en la majoria de les espècies, fet que suggereix estratègies complementàries.
Mackey, Robin L. "Disturbance and biodiversity." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ66170.pdf.
Повний текст джерелаPrendergast, John Richard. "Biodiversity hotspots in Britain." Thesis, Imperial College London, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300123.
Повний текст джерелаMata, Luis. "Heteroptera ecology, biodiversity and conservation = Ecología, biodiversidad y conservación de heterópteros." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/128959.
Повний текст джерелаLos heterópteros contribuyen de forma importante a la hiperdiversidad de los insectos. La elaboración de claves dicotómicas actualizadas, ajustadas a la región de estudio y basadas en caracteres de fácil observación, facilita la correcta identificación de los ejemplares. Los estudios faunísticos pueden beneficiarse considerablemente de la existencia de registros fotográficos in-situ y recursos electrónicos de registro de la biodiversidad, ya que ambas herramientas taxonómicas tienen el potencial de favorecer la investigación dirigida a la conservación, así como de implicar al público general en dicho proceso. Las síntesis, los catálogos y las bases de datos faunísticas son esenciales para registrar la ocurrencia y distribución de las especies. La utilización conjunta de estos recursos junto con variables ambientales relevantes para la ecología es clave para acortar la distancia que existe entre ciencias como la taxonomía y la conservación. La visión jerárquica supone una aproximación a la ecología cuantitativa, que tiene el potencial de incluir la estocasticidad asociada a los procesos ecológicos y de observación humana de la naturaleza. Los “modelos de ocupancia de lugar multiespecíficos (msSOM)“ suponen herramientas quantitativas efectivas para estimar la probabilidades de detección y ocurrencia específicas de especies y lugares, así como el tamaño de la comunidad. Los métodos bayesianos de inferencia estadística son herramientas poderosas para realizar análisis cuantitativos. La estimación de los parámetros viene asociada a su incertidumbre y al cálculo del “tamaño del efecto”. Y los resultados pueden comunicarse de forma clara y efectiva a los responsables de desarrollar políticas de conservación. Los heterópteros son detectados de forma imperfecta. Una buena fuente de incertidumbre depende de los métodos que utilicemos para muestrearlos, por lo que debe tenerse en cuenta el proceso de observación a la hora de analizar patrones de ocupancia y riqueza específica. Los protocolos de muestreo deberían estar diseñados de forma que incluyan réplicas espaciales y/o temporales que permitan calcular la detectabilidad. Los insectos heterópteros son relativamente comunes a lo largo de grandes áreas, y sus comunidades incluyen especies raras sólo detectables a pequeña escala. La asumpción de este patrón para la escala bioregional y superiores requiere mayor investigación. Los sistemas herbáceos noveles con vegetación ruderal o espontánea contienen una gran diversidad de insectos heterópteros. Como parte del paisaje urbano, los márgenes herbáceos y otras formaciones poco o nada gestionadas representan zonas importantes para conservar la diversidad de heterópteros y otros insectos. En cuanto a zonas verdes urbanas, como los campos de golf, la complejidad en la estructura de la vegetación tiene un efecto positivo en la biodiversidad de insectos. Los heterópteros se ven influenciados por el paisaje. En paisajes vitivinícolas, la ocurrencia de insectos herbívoros está favorecida por la proporción de hábitat natural favorable. En paisajes urbanos, la urbanizacion tiene un efecto negativo en la presencia de herbívoros y predadores. Ambos estudios, a partir de análisis distintos, convergen hacia una única conclusión.
Glücksman, Edvard. "Taxonomy, biodiversity, and ecology of Apusozoa (Protozoa)." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:b96f9e28-e7ea-494a-9dad-bcb844e28c53.
Повний текст джерелаDiaz, Porras Daniel F. "Historical urban ecology, green spaces and biodiversity." Thesis, University of Sheffield, 2013. http://etheses.whiterose.ac.uk/5214/.
Повний текст джерелаMarí, Marí Teresa. "Changes in soil biodiversity and activity along management and climatic gradients." Doctoral thesis, Universitat de Lleida, 2017. http://hdl.handle.net/10803/457976.
Повний текст джерелаLos llamados "rangelands" son áreas sin cultivar, ampliamente pastoreadas por animales domésticos y salvajes, actualmente amenazados por los cambios climático y de uso del suelo. Los microorganismos del suelo tienen un papel clave tanto en la descomposición como en diversos procesos del ecosistema, por lo que composición y función de la comunidad microbiana han sido utilizados durante mucho tiempo como índices de fertilidad del suelo. Los rangelands europeos y africanos comparten un origen antropogénico común, pero el clima y la gestión del suelo les afectan de una manera diferente. Es por ello que esta tesis pretende analizar la comunidad microbiana de ambos tipos de ecosistemas, a fin de observar los efectos de algunas de las amenazas comunes desde una perspectiva más global. Mientras que el sobrepastoreo demostró tener el efecto más perjudicial sobre la función microbiana en suelos kenianos, se encontró un efecto más fuerte del clima sobre los prados europeos. Los hongos y las bacterias covariaron a lo largo de gradientes altitudinales y climáticos, pero la comunidad bacteriana mostró una recuperación más rápida después de las perturbaciones biológicas y físico-químicas del suelo. Este conjunto de estudios añade nuevos conocimientos sobre la estructura y función de los rangelands africanos y europeos, e invita a explorar nuevas líneas de investigación que incluyan tanto bacterias como hongos en el estudio de la comunidad microbiana del suelo.
Rangelands are uncultivated areas extensively grazed by wild and domestic animals, currently threatened by land use and climatic changes. Soil microorganisms play a key role in decomposition and several ecosystem processes and the composition and function of the microbial community have been long used as indices of soil fertility. African and European rangelands share a common anthropogenic origin, but climate and management affect them in a different way. That is why this thesis aimed to analyze the microbial community of both in order to observe the effects of some common threats from a more global perspective. While overgrazing proved to have the most detrimental effect on the soil microbial function in Kenyan soils, a stronger effect of climate was found to affect European grasslands. Fungi and bacteria co-varied along altitudinal and climatic gradients, but the bacterial community showed a fast recovery after biological and soil physico-chemical disturbances. This group of studies adds new knowledge on the structure and function of the African and European rangelands, and invite to explore new lines of research including both fungal and bacterial consortia when studying the soil microbial community.
Griffin, Neil John. "Harvest ecology and biodiversity of South African Porphyra." Doctoral thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/10564.
Повний текст джерелаPorphyra (Bangiales, Rhodophyta) is the world's most valuable maricultured seaweed, due to its high value as a food crop. The vast majority of Porphyra in South Africa belongs to P. capensis, a morphologically and ecologically plastic taxon apparently endemic to the region. There is no demand for P. capensis as a food crop, as it is unsuitable for the market, and there are no records of its customary use locally. Porphyra capensis is however a potentially highly valuable fodder for the mariculture of abalone (Haliotis midae), and pressure to harvest it has recently increased. This study aims to assess the potential for harvest of Porphyra on the south-western shores of South Africa. There are two main thrusts to this work. The fIrst thrust examines Porphyra as an ecological entity in the region. The second thrust reassesses the taxonomy of Porphyra species in the region.
Ieraci, Luciano A. "Spatial intermittency, biodiversity, and multifractals." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33411.
Повний текст джерелаThe simplest treatment combining real and species space scaling is obtained by considering an anisotropic multifractal cascade in a (5-D) species-space-time space. With the help of a unique data base involving nearly three hundred different species densities, each over a spatial range of approximately 40, 0.5m x 0.5m samples from six underwater sites in the Saint Lawrence Estuary, this simple "superscaling" model is tested. It is shown that the scaling of all species densities is compatible with a "bilinear" multifractal model, where an "elliptical dimension" parameter characterises the anisotropy of species-real space. This information is then used to numerically simulate the spatial variability of joint species densities, and it is discussed how this framework can be used to define scale invariant measures of biodiversity.
Lacap, Donnabella Castillo. "Biodiversity and ecology of geothermal springs in the Philippines." Thesis, Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38224185.
Повний текст джерелаRominger, Andrew Rominger. "The Statistical Mechanics of Biodiversity." Thesis, University of California, Berkeley, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10150924.
Повний текст джерелаSince at least the time of Darwin biologists have searched for a simple set of universal governing mechanisms that dictate the dynamics of biodiversity. While much progress has been made in understanding system-specific processes and in documenting the context-dependent roles of such mechanisms as competition and facilitation, we still lack a universal governing rule set. The goal of understanding and predicting biodiversity dynamics comes at a critical moment when human systems are disrupting those very dynamics. In this thesis I approach this long-standing problem with the hypothesis that general patterns in biodiversity emerge from a combination of the statistical mechanics of large systems and the unique non-equilibrium dynamics imparted to biological systems by their evolutionary history. Statistical mechanics provides the key analytical approaches to abstracting the complex details of biodiversity into general macroscopic predictions that I show receive support from empirical data. However, key deviations from the simplest statistical mechanics of biodiversity reveal the key role of biological evolution in driving systems away from the idealized steady state predicted by statistical mechanics.
In Chapter 1 I expand a branch of non-equilibrial statistical mechanics, known as super statistics, to explain previously unaccounted for wild fluctuations in the richness of taxa through the Phanerozoic marine invertebrate fossil record and show how this non-equilibrium is driven by clades' punctuated exploration of their adaptive landscapes. This theory provides a novel explanation for deep time diversity dynamics invoking emergence of lineage-level traits as the drivers of complexity via the same mechanisms by which complexity emerges in large physical and social systems. In the context of fossil diversity I show how this complexity arises naturally from the uniquely biological mechanisms of punctuated adaptive radiation followed by long durations of niche conservatism, and thus identify these mechanisms as sufficient and necessary to produce observed patterns in the fossil record. I test this theory using two seminal fossil datasets.
In Chapter 2 I use the chronosequence afforded by the Hawaiian Islands to capture evolutionary snapshots of arthropod communities at different ages and stages of assembly to understand how the history underlying an assemblage determine its contemporary biodiversity patterns. I apply static ecological theory of trophic networks based on statistical mechanics to these rapidly evolving ecosystems to highlight what about the evolutionary process drives communities away from statistical idealizations. This study indicates that rapid assembly from immigration and speciation in young ecosystems and extinction in old ecosystems could drive observed patterns.
In Chapter 3 I highlight and explain the computational requirements to testing one statistical theory of biodiversity—the Maximum Entropy Theory of Ecology—with real data and make those test available in a stream-lined framework via the R package meteR that I authored.
Evans, James Philip Martin. "Biodiversity conservation and brownfield sites : a scalar political ecology?" Thesis, University of Birmingham, 2003. http://etheses.bham.ac.uk//id/eprint/185/.
Повний текст джерелаChivers, Adam John. "The biodiversity and ecology of Senghor Seamount (NE Atlantic)." Thesis, University of Aberdeen, 2015. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=227185.
Повний текст джерелаGari, Josep A. "The political ecology of biodiversity : biodiversity conservation and rural development at the indigenous and peasant grassroots." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365588.
Повний текст джерелаPeet, 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.
Повний текст джерела鄭遠技 and Yanna. "Biodiversity, ecology and taxonomy of saprobic fungi on palm fronds." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31242595.
Повний текст джерелаYanna. "Biodiversity, ecology and taxonomy of saprobic fungi on palm fronds /." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk:8888/cgi-bin/hkuto%5Ftoc%5Fpdf?B2295630x.
Повний текст джерелаKimble, Matthew Sidney. "Variation of aquatic and terrestrial riparian biodiversity in response to watershed condition /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/5527.
Повний текст джерелаFlombaum, Pedro. "The effect of biodiversity on ecosystem functioning: The Patagonian steppe as a model." View abstract/electronic edition; access limited to Brown University users, 2008. 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:3318318.
Повний текст джерелаFrancis, Anthony P. "Biodiversity of plants: Broad-scale patterns and mechanisms." Thesis, University of Ottawa (Canada), 2003. http://hdl.handle.net/10393/28984.
Повний текст джерелаKarlson, Mårten. "Ecology, Transport Infrastructure and Environmental Assessment." Licentiate thesis, KTH, Miljöbedömning och -förvaltning, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-123562.
Повний текст джерелаQC 20130612
GESP
Ruiz, Jaen Maria. "The Relationship between Biodiversity and Ecosystem Function in Tropical Ecosystems." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104676.
Повний текст джерелаDes études expérimentales qui ont été effectuées dans des systèmes expérimentaux herbacés du milieu tempéré afin d'évaluer le rôle de la diversité biologique et ses effets sur le fonctionnement de l'écosystème ont généralement pu montrer que le déclin dans le nombre d'espèces a un effet négatif sur le fonctionnement de l'écosystème. Même si cette relation a été étudiée de façon intensive au cours des dix dernières années, très peu est encore connu à ce propos dans les écosystèmes tropicaux, beaucoup plus complexes et mégadiversifiés. Mes travaux de recherche examinent la relation entre diversité biologique et fonction de l'écosystème dans les forêts naturelles tropicales, en mettant l'emphase sur la question d'échelle. Cette recherche est basée sur une approche de terrain, en opposition avec une approche théorique. L'approche de terrain aborde la relation entre la diversité biologique à l'état naturel et les fonctions d'écosystème dans des parcelles forestières de physionomies similaires mais d'une composition en espèces différente. De façon plus spécifique, j'explore les questions suivantes : (1) Comment la relation entre diversité biologique et fonction d'écosystème peut-elle être détectée dans un environnement et un espace naturel changeant?, (2) Comment différentes mesures de diversité (espèces vs fonction) expliquent-elles les stocks de carbone dans les arbres?, (3) Pouvons-nous confondre l'effet de la diversité en espèces sur l'entreposage du carbone dans les arbres avec l'effet de la structure de la forêt? (4) Comment cette relation change-t-elle avec différentes échelles spatiales? (5) Pouvons-nous extrapoler les résultats obtenus dans des plantations expérimentales aux forêts naturelles dans les tropiques en ce qui a trait à la relation entre biodiversité et fonction d'écosystème? Ainsi, ma thèse montre que pour les écosystèmes tropicaux, les facteurs environnementaux tels que ceux reliés à la topographie, les facteurs physiques et les nutriments des sols ont peu d'effet sur l'entreposage du carbone dans les arbres. De plus, la richesse en espèces ne peut pas à elle prédire de l'entreposage de carbone dans les arbres, cependant lorsque celle-ci est divisée par types fonctionnels, sa puissance explicative augmente. Les traits fonctionnels peuvent donc être utiles pour révéler une relation entre le stockage du carbone et la diversité en arbres en réduisant les espèces en des types fonctionnels. La structure de la forêt est le moteur principal du stockage arboricole du carbone indépendamment de l'échelle, par contre cette dernière est reliée aux traits fonctionnels des espèces. Finalement, nous avons pu montrer que la prudence est de mise en ce qui concerne toute possible extrapolation de résultats provenant de plantations expérimentales à des forêts naturelles dans les tropiques.
Dibog, Luc. "Biodiversity and ecology of termites (Isoptera) in a humid tropical forest." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322058.
Повний текст джерелаDyson, Kirstie Elizabeth. "Biodiversity and ecosystem processes in heterogeneous environments /." St Andrews, 2008. http://hdl.handle.net/10023/698.
Повний текст джерелаPerez, Jaime Abraham. "PATTERNS AND DRIVERS OF ANT BIODIVERSITY ALONG URBANIZATION GRADIENTS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1591823939916649.
Повний текст джерелаLlorens, Marès Tomàs. "Connecting biodiversity and biogeochemical role by microbial metagenomics." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/327597.
Повний текст джерелаL'objectiu principal d'aquesta tesi és explorar els vincles entre la biogeoquímica i la diversitat microbiana, mitjançant la metagenòmica com a eina per determinar el potencial funcional de les comunitats i connectar la perspectiva mecanicista amb l’holística en l'estudi dels ecosistemes. Per tal d'explorar el potencial i les limitacions de la metagenòmica, es van seleccionar dos ecosistemes lacustres contrastats i àmpliament estudiats amb interès ecològic global. En primer lloc, el sistema càrstic de Banyoles, un equivalent de les condicions sulfuroses i anòxiques (euxíniques) en l'inici de la vida a la Terra, seleccionant tres llacs que proporcionen diferents situacions limnològiques amb alta disponibilitat de compostos reduïts i sulfat: el Llac Cisó , un petit llac eutròfic amb importants entrades de carboni orgànic, anòxia permanent i alta euxinia; el Llac Vilar, un llac mesotròfic i meromíctic; i la cubeta CIII del llac Banyoles, una cubeta profunda, oligotròfica i meromíctica. I en segon lloc, l’ultraoligotròfic Llac Redon en tres situacions limnològiques diferents: les capes de granissat (slush), un ambient oxigenat amb carboni làbil procedent d’exsudats d'algues; la massa d'aigua oxigenada de l’epilímnion amb baixa disponibilitat de compostos reduïts; i l'hipolímnion, una massa d'aigua en foscor sota la influència de processos microbians de mineralització que es donen en el sediment. El coneixement previ de la biogeoquímica, ecologia i funcionament d'aquests ecosistemes, ha ofert un excel·lent marc per a establir els vincles entre biodiversitat microbiana i funció biogeoquímica mitjançant una aproximació metagenòmica. En conjunt, aquesta tesi proporciona una nova visió sobre el funcionament biogeoquímic de llacs càrstics i alpins. Tot i les limitacions intrínseques a la metagenòmica i al procés d'anotació gènica, hem utilitzat els coneixements previs sobre l'ecologia dels llacs per demostrar que la metagenòmica és una eina molt precisa per donar a conèixer els vincles entre el potencial funcional i la biodiversitat microbiana de qualsevol ecosistema. S'han identificat les poblacions bacterianes potencialment responsables dels processos biogeoquímics i es proporcionen noves hipòtesis que hauran de ser comprovades mitjançant enfocaments experimentals i de quantificació dels fluxos de matèria i energia implicats.
Karlson, Mårten. "Road Ecology for Environmental Assessment." Doctoral thesis, KTH, Mark- och vattenteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-176399.
Повний текст джерелаQC 20151103
GESP
Wong, Yim-wah, and 黃炎華。. "Ecology and biodiversity of a degraded landscape: Lamma Island, Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B3123947X.
Повний текст джерелаCornelius, Nils. "Biodiversity and ecology of benthic foraminiferans from the Antarctic deep sea." Thesis, University of Southampton, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.416476.
Повний текст джерелаAung, Swe. "Biodiversity, systematics and ecology of nematode-trapping fungi from Hong Kong." Thesis, Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B41634214.
Повний текст джерелаAl-Khayat, Jassim Abdulla A. A. "Biodiversity and biology of salt marsh and mangal Brachyura in Qatar." Thesis, Bangor University, 1996. https://research.bangor.ac.uk/portal/en/theses/biodiversity-and-biology-of-salt-marsh-and-mangal-brachyura-in-qatar(ff9d667e-8d07-469e-938f-f07db75d64fa).html.
Повний текст джерелаStockan, Jennifer A. "Impacts of riparian buffer strips on biodiversity." Thesis, University of Aberdeen, 2013. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=211222.
Повний текст джерелаRoche, David. "Biodiversity: Its Measurement and Metaphysics." University of Sydney. Unit for the History and Philosophy of Science, 2001. http://hdl.handle.net/2123/819.
Повний текст джерелаHo, Wai-hong, and 何偉康. "Biodiversity, ecological and ultrastructural observations of Fungi on wood submerged in tropical streams." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31237010.
Повний текст джерелаSun, Yanan. "Biodiversity and phylogeny of coral-associated polychaetes." HKBU Institutional Repository, 2011. http://repository.hkbu.edu.hk/etd_ra/1278.
Повний текст джерелаTunison, Robert. "Average Taxonomic Distinctness as a Measure of Global Biodiversity." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535635897703678.
Повний текст джерелаDymond, Crewenna Isabel. "A multiple scale approach to investigating relationships between biodiversity and wilderness quality." Thesis, University of Leeds, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250976.
Повний текст джерелаBennett, Sophie Louisa. "The invertebrate biodiversity of differently aged arable farmland hedgerows under environmental stewardship." Thesis, University of Lincoln, 2016. http://eprints.lincoln.ac.uk/23690/.
Повний текст джерелаFaul, Andre Karel. "Biodiversity enhancement in Cape Flats urban habitats." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/2823.
Повний текст джерелаBiodiversity is under enormous pressure from an increasing human population. Urbanisation, agriculture, and mining are just some of the factors responsible for the continuous degradation of the natural environment. Of these, urbanisation is one of the leading factors of diversity loss. To address this problem, it is necessary to understand the relationship between biodiversity and urban areas, as well as the relationship between society and biodiversity. This study focuses on these relationships and suggest ways in which urban biodiversity can be maximised without compromising on development. In order to create an urban environment that successfully supports maximised biodiversity, new methods and ideas must be developed to promote the protection of urban ecosystems. The Cape Floristic Region in South Africa is a good example of an area that requires immediate action in order to prevent enormous losses in biodiversity. Data have shown drastic decreases in natural vegetation cover in this area, and with its close to 9000 species, of which approximately 60% occurs nowhere else in the world. This state of affairs should be regarded as a serious crisis. This study consists of three main parts, the first being a literature review on the current relationships between the urban environment, society, and biodiversity. The second and third parts report on two empirical investigations on the campus of the Faculty of Health Sciences at the University of Stellenbosch in the City of Cape Town. The first of these investigates the possibility of using spirituality connected to nature as a promotional tool for conservation through rehabilitation or restoration of damaged urban vegetation habitats. For this purpose students’ and staff members’ opinions of the urban nature at the campus were tested. In the second investigation the options of restoring biodiversity to the campus was considered by exploring the best options available for rehabilitation while taking the current biodiversity status on and around the premises into account. This was carried out through three smaller projects that included the physical reintroduction of plant species, vegetation analysis, and bird identification and attraction. The response of employees and students at the Faculty of Health Sciences was found to be in favour of restoring vegetation and animal life to the campus. This is supported by a belief that their attitude towards their work would improve with improved natural surroundings. Initial rehabilitation attempts highlighted the complexity of rehabilitation practices by bringing forward challenges and problems experienced with the reintroduction of plant species. Despite these problems, increased plant diversity in experimental areas showed the possibility of successfully completing the project. Biodiversity analysis showed that methods of controlling vegetation used by the university are doing more harm than good, as it results in indigenous vegetation being displaced by exotic vegetation. This study introduces a number of questions regarding the relationship between urbanisation and biodiversity and to what extent the two should be linked. Hopefully it is a step in the direction towards marrying the urban and natural environment, and to create a sustainable urban environment where society no longer sees nature as something outside the city boundaries.
Schäfer, Martina. "Mosquitoes as a Part of Wetland Biodiversity." Doctoral thesis, Uppsala universitet, Populationsbiologi, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4670.
Повний текст джерелаHotaling, Scott. "GENETIC PERSPECTIVES ON BIODIVERSITY IN ROCKY MOUNTAIN ALPINE STREAMS." UKnowledge, 2017. http://uknowledge.uky.edu/biology_etds/44.
Повний текст джерелаDonlan, Charles Joseph. "On the ecology of invasive species, extinction, ecological history, and biodiversity conservation." PURL Connect to full text. Access to electronic version of some theses may be restricted, 2008. http://hdl.handle.net/1813/8423.
Повний текст джерелаHunt, Robert. "Liberation Ecology of the Border Wall| Biodiversity in the Age of Biopolitics." Thesis, Prescott College, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10689661.
Повний текст джерелаConservationists have detailed the potential impacts of the Border Wall on wildlife. The issue with this assertion is that little direct measurements of such impacts have been actually made. To determine the current state of the Wall’s impacts, if any, I have used phenomenology to ascertain the structure and apparent impacts of the Wall. My measurements of the elements of the Wall’s security footprint seem to indicate a potential for impacting wildlife and their habitats, especially if it is to be expanded beyond its current deployment. What I did discover is the full human impacts of the Wall, and these may supersede wildlife impacts and render conservation efforts moot. Conservation of wildlife will need to address the human ecology of the Wall in order to build truly sustainable successes in preservation and restoration projects.
Ngobo, Nkongo Martine P. "Ecology and socio-economic importance of short fallows in the humid forest zone of Southern Cameroon." Thesis, Bangor University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250738.
Повний текст джерелаSmall, Emma Clare. "The biodiversity and population of carbid beetles (coleoptera, carabidae) in fragmented urban habitats." Thesis, University of Birmingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289261.
Повний текст джерелаFabricius, Christo 1956. "The impact of land use on biodiversity in xeric succulent thicket, South Africa." Doctoral thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/9512.
Повний текст джерелаHuman-induced land management practices are key factors which influence the dynamics of landscapes, land elements and biotic communities in Xeric Succulent Thicket, a notoriously fragile and low resilience ecosystem in the Eastern Cape, South Africa. In its natural state this vegetation type is characterized by a continuous mosaic of clumps of diverse woody shrubs in a matrix of grass, hardy dwarf shrubs and bare ground. When indigenous herbivores are replaced by domestic livestock at unsustainable stocking rates, the ratio of clump to interclump areas decreases. This has impacts on biodiversity at the landscape level, and affects the composition and species richness of plant, arthropod and reptile communities and fungal symbionts. The study has two main objectives: 1) to detennine the local-level effects of different types of land use on biodiversity in Xeric Succulent Thicket; and 2) to better understand the factors which affect biodiversity in different taxonomic groups and at different spatial scales, so that the preservation function of protected areas could be enhanced. The key questions which are addressed in the thesis are what does 'biodiversity' mean, and what are its different dimensions in Xeric Succulent Thicket; what roles do protected areas and other lands play in preserving biodiversity, how are different taxonomic groups affected by different types of land use; and how can biodiversity be monitored and measured? . The regional 'conservation landscape' is seen as the protected area plus the land immediately adjoining it, and is viewed as an integrated mosaic of anthropogenic landscapes (land management units), land elements (patches within landscapes). producer communities (assemblages of interacting plant species), consumer communities (assemblages of interacting herbivores and predators) and soil microorganisms. From a process point of view, the research relates the intensity of disturbance, mainly as a result of herbivory, to landscape complexity, the structure of land elements, and the species richness of producers and consumers within land elements. The patterns which emerge are interpreted in the context of ecosystem functioning, from the point of view of a practicing conservation biologist.
Smith, Kate. "Biodiversity of the invertebrate communities associated with intertidal mussel beds on rocky shores." Thesis, Bangor University, 2001. https://research.bangor.ac.uk/portal/en/theses/biodiversity-of-the-invertebrate-communities-associated-with-intertidal-mussel-beds-on-rocky-shores(48485c79-2e4c-48d7-93c9-60b67d78e30f).html.
Повний текст джерелаCarter, Charlotte Emily. "Assessing the interaction between landscape characteristics and biodiversity." Thesis, University of Warwick, 2014. http://wrap.warwick.ac.uk/66477/.
Повний текст джерелаBourguignon, Thomas. "The Anoplotermes group in French Guiana :systematics, diversity and ecology." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210132.
Повний текст джерелаDoctorat en Sciences
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Toly, Noah J. "From parks to pills a political ecology of biodiversity conservation in Costa Rica /." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 0.88 Mb., 299 p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3205437.
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