Relevant bibliographies by topics / Loss of species / Dissertations / Theses
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Dissertations / Theses on the topic 'Loss of species'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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1

Clements, C. F. "Extinction and environmental change : testing the predictability of species loss." Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/5074/.

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2

Pendleton, Richard McCall. "Investigating Realistic Scenarios of Biodiversity Loss on Ecosystem Functioning: Extirpation of Rare Species and Food Web Collapse in Tropical Floodplain Lagoons." Thesis, University of North Texas, 2012. https://digital.library.unt.edu/ark:/67531/metadc115137/.

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This thesis investigates the influence of nonrandom species loss on the structure and functioning of trophic floodplain lagoons. Two experiments were conducted based on different realistic scenarios of biodiversity loss using multitrophic fish assemblages derived from long-term survey data. Loss of fish diversity influenced overall ecosystem multifunctionality of these lagoons through complex multitrophic interactions throughout the aquatic food web. These results indicate that biodiversity loss from diverse multitrophic ecosystems can influence ecosystem structure and function and likely de
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3

Desrochers, Rachelle. "Habitat Loss and Avian Range Dynamics through Space and Time." Thesis, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20374.

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The species–area relationship (SAR) has been applied to predict species richness declines as area is converted to human-dominated land covers.In many areas of the world, however, many species persist in human-dominated areas, including threatened species. Because SARs are decelerating nonlinear, small extents of natural habitat can be converted to human use with little expected loss of associated species, but with the addition of more species that are associated with human land uses. Decelerating SARs suggest that, as area is converted to human-dominated forms, more species will be added to th
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4

So, Rachel I. "Does Additional Habitat Protection Facilitate the Recovery of Species Protected by the Endangered Species Act?" Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/30910.

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Earlier studies have found that endangered species recovery is only weakly associated with the tools enabled by the U.S. Endangered Species Act (ESA). With habitat loss often cited as a leading cause of species declines, we tested whether the recovery of ESA-listed species is instead associated with the protection of critical habitat (CH) by protected areas. We tested the relationship for 299 species using recovery indices derived from the biennial status reports to Congress (1990-2010), as well as NatureServe and IUCN population status data. We found no overall relationship between recover
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5

Gibbs, Mary Katherine E. "Species Declines: Examining Patterns of Species Distribution, Abundance, Variability and Conservation Status in Relation to Anthropogenic Activities." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23315.

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Humans are modifying the global landscape at an unprecedented scale and pace. As a result, species are declining and going extinct at an alarming rate. Here, I investigate two main aspects of species’ declines: what factors are contributing to their declines and how effective our conservation efforts have been. I assessed one of the main mechanisms for protecting species by looking at the Endangered Species Act (ESA) in the United States. I examined three separate indicators of species declines for different groups of species: range contractions in Canadian imperilled species, declines in abun
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6

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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7

De, Camargo Rafael Xavier. "Ecological Responses of Avian Species to Land Cover Metrics at the Landscape-Level and Across Broad Spatial Extent." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37113.

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Human activities have transformed natural landscapes into human-dominated areas at unprecedented rates in the last centuries. Land cover transformation is associated with loss of natural habitat, thus a threat to biodiversity. Because habitat loss will likely continue in the future due to population growth and increase demand for natural resources, an important question in ecological studies is whether land cover features (i.e. amount, variety, shape, configuration) can be used as predictors to estimate species loss from habitat modification. This thesis investigates the predictive ability of
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8

Eklöf, Anna. "Species extinctions in food webs : local and regional processes." Doctoral thesis, Linköpings universitet, Teoretisk Biologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-51815.

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Loss of biodiversity is one of the most severe threats to the ecosystems of the world. The major causes behind the high population and species extinction rates are anthropogenic activities such as overharvesting of natural populations, pollution, climate change and destruction and fragmentation of natural habitats. There is an urgent need of understanding how these species losses affect the ecological structure and functioning of our ecosystems. Ecological communities exist in a landscape but the spatial aspects of community dynamics have until recently to large extent been ignored. However, t
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9

Lockhart, James P. A. "The role of chemical activation in the formation and loss of atmospheric carbonyl species." Thesis, University of Leeds, 2014. http://etheses.whiterose.ac.uk/7257/.

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The Earth’s atmosphere is often compared to a low temperature combustion system in which solar energy drives radical oxidation of trace gases. The OH radical is the key daytime radical oxidant and reacts rapidly with the majority of the anthropogenic and biogenic volatile organic compounds (VOCs) released to the atmosphere. Over the past two decades, field campaigns in remote regions, characterised by high concentrations of hydrocarbons, such as isoprene, but relatively low concentrations of NOx (NO + NO2) have highlighted significant discrepancies between measured and modelled concentrations
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10

Hamida, Youcef. "The Evolution of Dispersal for the Case of Two-Patches and Two-Species with Travel Loss." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu149259130964176.

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11

Van, Acker Rene C. "Multiple-weed species interference in broadleaved crops : evaluation of yield loss prediction and competition models." Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308562.

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12

Bryce, Rosalind L. "The ecosystem engineering and trophic effects of the water vole : species loss and ecosystem processes." Thesis, University of Aberdeen, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.446587.

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We investigated the engineering and trophic effects of an endangered burrowing herbivore, the water vole <i>Arvicola terretris</i> in upland environments. Plant community composition and structure was altered around burrows. There were also shifts in the relative composition of plant functional groups. Landscape scale heterogeneity was increased by the metapopulation of structure of water vole colony patches. The intensity of past occupancy was a determinant of community composition and structure in patches. Greater past occupancy and more burrowing disturbance had occurred in more species ric
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13

Bonnell, Elizabeth Ann. "Temperature Dependent Behavior of Optical Loss from Hydrogen Species in Optical Fibers at High Temperature." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/78132.

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This study reports on the behavior of silica based optical fibers in a hydrogen environment at high temperatures. The hydrogen response in the form of optical loss in the wavelength range of 1000-2500 nm of a germanium doped graded index 50/125 graded index fiber was examined in the temperature range of 20–800 °C. When the fiber was exposed to hydrogen at 800 °C two absorption bands appeared: ~1390 nm assigned to the first overtone of the hydroxyl stretch and ~2200 nm band with complex assignments including the combination mode of the fundamental hydroxyl stretch with SiO4 tetrahedral vibratio
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14

Farooq, Muhammad Ali. "Iron Citrate Toxicity Causes aco1Δ-induced mtDNA Loss in Saccharomyces cerevisiae". ScholarWorks@UNO, 2013. http://scholarworks.uno.edu/honors_theses/34.

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Aconitase is an enzyme of the Krebs cycle that catalyzes the isomerization of citrate to isocitrate. In addition to its enzymatic activity, Aco1 has been reported to bind to mitochondrial DNA (mtDNA) and mediate its maintenance in the budding yeast S. cerevisiae. In the absence of Aco1, cells rapidly lose mtDNA and become “petite” mutants. The purpose of this study is to uncover the mechanism behind mtDNA loss due to an aco1 deletion mutation. We found that an aco1 mutation activates the mitochondria-to-nucleus retrograde (RTG) signaling pathway, resulting in increased expression of citrate sy
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15

McNeely, Brendan. "The Roles of Nitric Oxide, Oxidative Stress, and Angiotensin II Type 1 Receptor in Regulating Cutaneous Blood Flow and Sweating During Prolonged Exercise in the Heat with and without Fluid Replacement." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36527.

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The current study evaluated whether NO synthase (NOS) contributes to cutaneous vasodilation and sweating during prolonged exercise in the heat. In addition, we determined if prolonged exercise-induced increases in reactive oxygen species (ROS) and activation of angiotensin II type 1 receptors (AT1R) impair heat loss responses. On two separate days, eleven young men completed 90-min of continuous cycling at ~600W of metabolic heat production followed by 40-min of recovery in the heat (40ºC). To evaluate the role of excess fluid loss via sweating, participants completed a second session of the s
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16

Lamkin, Megan K. "The Extent of Contemporary Species Loss and the Effects of Local Extinction in Spatial Population Networks." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1468337029.

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17

McWilliams, Chris. "Habitat loss and species interactions : an in silico investigation of the structure and dynamics of ecological communities." Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.701387.

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18

Matthews, Thomas James. "Analysing and modelling the impact of habitat fragmentation on species diversity : a macroecological perspective." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:1d71c6fe-06eb-4135-bdb3-874bb273bcb1.

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The destruction and fragmentation of natural habitat is the leading driver of the current extinction crisis. As a result, a research area has emerged focused on studying ecology in islands of natural habitat surrounded by a sea of anthropogenic land uses, so called ‘habitat islands’. However, this research has largely been undertaken on small-medium scales, generally in single systems. Furthermore, many habitat island studies have used previous results and theory derived in the context of oceanic island research. Thus, this thesis aims to examine a variety of macroecological and biogeographica
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19

Perlini, Rossella Angela. "Effects of Paramuricea clavata (Risso, 1826) (Anthozoa: Plexauridae) forests on settlement of benthic species: an experimental approach." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amslaurea.unibo.it/1803/.

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Rationale: Coralligenous habitat is considered the second most important subtidal “hot spot” of species diversity in the Mediterranean Sea after the Posidonia oceanica meadows. It can be defined as a typical Mediterranean biogenic hard bottom, mainly produced by the accumulation of calcareous encrusting algae that, together with other builder organisms, form a multidimensional framework with a high micro-spatial variability. The development of this habitat depends on physical factors (i.e. light, hydrodynamism, nutrients, etc.), but also biologic interactions can play a relevant role in struc
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20

Coffey, Bethany N. "Melanin as an Oto-Protective Pigment in Two Fish Species: Poecilia Latipinna and Cyprinus Carpio ." TopSCHOLAR®, 2014. http://digitalcommons.wku.edu/theses/1403.

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Melanin is the dark pigment found in most organisms that gives color to the skin, hair, feathers, and eyes of vertebrates. While melanin is known to also be present in the stria vascularis of the mammalian cochlea, its function in the inner ear is still unknown. Some previous studies have indicated that melanin may serve to protect the mammalian ear from hearing loss. Minimal previous research on melanin within the inner ears of fishes has been conducted. In this study, the melanin levels in the inner ears of different color morphs of two fish species (Poecilia latipinna and Cyprinus carpio) w
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21

Stokes, Victoria J. "The impact of microenvironment, leaf development and phenology on annual carbon gain and water loss of two deciduous tree species." Thesis, University of Essex, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250081.

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22

Heer, Henriette [Verfasser], Ralf B. [Gutachter] Schäfer, and Stefan [Gutachter] Ruzika. "Mathematical models of species dispersal and the resilience of metapopulations against habitat loss / Henriette Heer ; Gutachter: Ralf B. Schäfer, Stefan Ruzika." Landau : Universität Koblenz-Landau, Campus Landau, 2021. http://d-nb.info/1230798900/34.

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23

Maegan, Annette Fitzgerald. "Contextualizing chimpanzee research within the socioecological landscape of the Forestière region of the Republic of Guinea, Africa." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/265178.

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付記する学位プログラム名: 霊長類学・ワイルドライフサイエンス・リーディング大学院<br>京都大学<br>新制・課程博士<br>博士(理学)<br>甲第23406号<br>理博第4741号<br>新制||理||1680(附属図書館)<br>京都大学大学院理学研究科生物科学専攻<br>(主査)教授 平田 聡, 教授 村山 美穂, 教授 伊谷 原一<br>学位規則第4条第1項該当<br>Doctor of Science<br>Kyoto University<br>DGAM
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24

Chambers, Joanne. "Terrestrial habitat requirements of a suite of anuran species inhabiting a semi-arid region of South East Queensland." Queensland University of Technology, 2008. http://eprints.qut.edu.au/16610/.

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Hypothesised causes of the observed world-wide decline of amphibian populations are varied and in some cases contentious. Insufficient information relating to the autecology of many amphibian species can cause erroneous speculations regarding critical habitat requirements and hence management programs designed to enhance population viability are often unsuccessful. Most amphibians display a bi-phasic life history that involves occupation of an aquatic breeding habitat and terrestrial habitats that are used for foraging, and shelter from predation and environmental stress. However, the focus of
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25

Lawson, Laté Ayao. "Essays on economic growth energy use and biodiversity loss." Electronic Thesis or Diss., Strasbourg, 2019. http://www.theses.fr/2019STRAB011.

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L'impact de l'activité économique et de l'augmentation de la population sur l'environnement soulève de profondes questions sur l'avenir des sociétés humaines et des ressources environnementales. En ceci, les "Limites de la Croissance" ("Limits to Growth", Meadows, Meadows, Behrens et Randers, 1974) mettent en garde les sociétés humaines contre la possibilité d'un effondrement social si les tendances actuelles d'exploitation de ressources naturelles et de dégradation de l'environnement suivent leur court. La richesse de la nature étant primordiale à la richesse des nations, cette thèse en scien
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Drew, Shelley Jean. "Hearing loss induced by bacterial meningitis : investigations into the possible involvement of: i) Bacterial ototoxins; ii) Nitric oxide, excitotoxicity, and reactive oxygen species." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393838.

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27

Vidal, Mariana Morais. "Risco de extinção e a persistência de redes de interação entre plantas e frugívoros." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/41/41134/tde-15122014-113558/.

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A dispersão de sementes por vertebrados é um processo ecológico muito importante para a manutenção da biodiversidade, especialmente nas regiões tropicais. Estas interações mutualistas podem ser rompidas devido à caça e a perda e fragmentação de habitats, na medida em que estas ameaças podem levar os parceiros mutualistas à extinção. No presente trabalho, buscamos entender as consequências de possíveis extinções de aves frugívoras sobre a organização de sistemas de dispersão de sementes na floresta Atlântica brasileira. Primeiro, nós caracterizamos o papel que cada uma das espécies desempenha e
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28

Jantzen, Friederike [Verfasser], Michael [Akademischer Betreuer] Lenhard, Vainstein [Gutachter] Alexander, and Florian P. [Gutachter] Schiestl. "Genetic basis and adaptive significance of repeated scent loss in selfing Capsella species / Friederike Jantzen ; Gutachter: Vainstein Alexander, Florian P. Schiestl ; Betreuer: Michael Lenhard." Potsdam : Universität Potsdam, 2019. http://d-nb.info/1218405139/34.

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29

Jonsson, Micael. "Investigations of species richness effects on ecosystem functioning using stream-living macroinvertebrates as model organisms." Doctoral thesis, Umeå : Univ, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-164.

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30

Kaufman, Tara. "Out with the Anthropocene: Art for an Animate Earth." Master's thesis, Temple University Libraries, 2019. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/598287.

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Art History<br>M.A.<br>Ensnared in but fed up with the inanity of late capitalism and environmental ruin, this thesis examines the ways in which contemporary artists are working against the grain of the dominant anthropocentric Western culture to seek new pathways out of the so-called Anthropocene. The artists under discussion, Carolina Caycedo, Krista Caballero and Frank Ekeberg, and Natalie Jeremijenko, create participatory projects that simultaneously critique the entanglement of human practices and loss of species and encourage their audiences (and the larger global public) to formulate ne
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31

Cateau, Eugénie. "Réponse des coléoptères saproxyliques aptères aux perturbations anthropiques des forêts et des paysages." Thesis, Toulouse, INPT, 2016. http://www.theses.fr/2016INPT0045/document.

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Dans un contexte de changement climatique, des dispositifs sont mis en place par les politiques publiques pour permettre le déplacement de la biodiversité et la recolonisation de nouveaux milieux (TVB, trame de vieux bois. . . ). Ces dispositifs semblent adaptés pour les espèces animales les plus mobiles. Or, les espèces ayant une faible capacité de déplacement représentent un enjeu important pour l'e‑cacité des dispositifs mis en place. Un grand nombre de ces espèces demeurent aujourd'hui mal connues. En forêt, les coléoptères saproxyliques aptères de litière sont des espèces ayant des capaci
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Filho, Walter Mesquita. "Invasão e estabelecimento de Digitonthopagus gazella (Coleoptera, Scarabaeidae) em Selvíria, MS e seus impactos na comunidade de besouros coprófagos nativos durante 22 anos." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-04012018-151155/.

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Invasões biológicas são uma das maiores ameaças à biodiversidade mundial. O estabelecimento de espécies exóticas, principalmente de insetos, em vários países ocorreu por meio da utilização de controle biológico, quando se introduz uma espécie exótica para o controle de outra. Em alguns casos, por diferentes motivos, espécies introduzidas com este objetivo acabaram se tornando invasoras. O besouro coprófago Digitonthophagus gazella é um destes exemplos. O objetivo desta tese foi avaliar o impacto de D. gazella sobre a abundância, diversidade e turnover de uma comunidade de besouros coprófagos n
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33

Hill, Louise. "Ecological impacts of ash dieback in Great Britain." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:941ee684-798b-47b6-ae51-64baeb5f821e.

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Ash dieback is a severe disease of ash trees (Fraxinus spp.), caused by the invasive fungus Hymenoscyphus fraxineus. In its native East Asia, H. fraxineus is a harmless endophyte, but since its accidental import into Europe in the early 1990s it has infected over 90% of ash trees in some areas, with long-term mortality sometimes exceeding 90%. The disease was discovered in Great Britain in 2012, and has since spread rapidly. This thesis investigates some of the possible impacts on biodiversity, ecosystem functioning, and society, and in doing so identifies ways to alleviate some impacts. Brita
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34

Hutchison, Melissa Alice Sarah. "Interactions between habitat fragmentation and invasions: factors driving exotic plant invasions in native forest remnants, West Coast, New Zealand." Thesis, University of Canterbury. School of Biological Sciences, 2009. http://hdl.handle.net/10092/3218.

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Habitat fragmentation and biological invasions are widely considered to be the most significant threats to global biodiversity, and synergistic interactions between these processes have the potential to cause even greater biodiversity loss than either acting alone. The objective of my study was to investigate the effects of fragmentation on plant communities in native forest fragments, and to examine potential interactions between these effects and invasions by exotic plants at multiple spatial scales. I examined edge, area and landscape effects on plant invasions using empirical data from fra
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Rosa, Roberto. "Vinculando a etnoictiologia ?s evid?ncias biol?gicas para explicar o decl?nio da riqueza da ictiofauna neotropical." Universidade Federal do Rio Grande do Norte, 2014. http://repositorio.ufrn.br:8080/jspui/handle/123456789/18254.

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Made available in DSpace on 2014-12-17T15:55:05Z (GMT). No. of bitstreams: 1 RobertoR_DISSERT.pdf: 1125393 bytes, checksum: 639c9308ec555425dc29f7b3bad222f8 (MD5) Previous issue date: 2014-01-31<br>The diversity of fish species from South America has been affected by various anthropogenic practices. Some studies have reported the influence that illegal transferring or introduction of exotic species have on the trophic webs of continental lakes. The loss of diversity on fish populations and consequent impacts on fishery are commonly evidenced in these cases. The Brazilian Northeast has ponds
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Assmann, Suelem Martini. "Na beira do rio tem uma plantação: estudando o novo código florestal na bacia do Ribeirão Paraíso, Jataí – GO." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/6761.

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Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2017-01-18T10:57:15Z No. of bitstreams: 2 Dissertação - Suelem Martini Assmann - 2016.pdf: 3866760 bytes, checksum: ca76b11f1bc1b7e011b8779d07190fb7 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-01-18T10:57:36Z (GMT) No. of bitstreams: 2 Dissertação - Suelem Martini Assmann - 2016.pdf: 3866760 bytes, checksum: ca76b11f1bc1b7e011b8779d07190fb7 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made a
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Silva, Daniel de Paiva. "Considerações sobre a biodiversidade de abelhas brasileiras: vícios de coleta, distribuições potenciais e fragmentação." Universidade Federal de Goiás, 2014. http://repositorio.bc.ufg.br/tede/handle/tede/7369.

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Submitted by JÚLIO HEBER SILVA (julioheber@yahoo.com.br) on 2017-05-22T20:00:54Z No. of bitstreams: 2 Tese - Daniel de Paiva Silva - 2014.pdf: 10957994 bytes, checksum: 6f0100ece2bde63eead33101bf358768 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Rejected by Luciana Ferreira (lucgeral@gmail.com), reason: Sei que já enviou o comprovante, mas não conta a ata e o TECA não está onde deveria. on 2017-05-25T11:39:37Z (GMT)<br>Submitted by JÚLIO HEBER SILVA (julioheber@yahoo.com.br) on 2017-05-25T18:42:10Z No. of bitstreams: 2 Tese - Daniel de Paiva Silva - 2014.pdf
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Ribeiro, Fernando Silverio. "Pressão de propágulos ou distúrbios? Decifrando os determinantes da invasão por cachorros na Mata Atlântica." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/41/41134/tde-13102016-090618/.

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Invasões biológicas representam atualmente a segunda maior ameaça à biodiversidade e dois fatores são considerados os mais importantes para o sucesso de invasões: pressão de propágulos e distúrbios. Um tipo de distúrbio antrópico que pode promover invasões, por mudar a quantidade de habitats alterados e a extensão de bordas entre eles e habitats nativos, é a perda de habitat. Apesar da reconhecida importância da pressão de propágulos e dos distúrbios, poucos estudos os investigaram simultaneamente e, os que o fizeram, apresentam limitações, como escalas espaciais pequenas e correlações entre o
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Rönkä, N. (Nelli). "Phylogeography and conservation genetics of waders." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526211633.

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Abstract Many waders are in decline, and the number of endangered species and populations is increasing. Their protection and management requires knowledge of both ecological and genetic state of the populations. In this thesis, I studied the distribution-wide genetic variation, structure and phylogeography of the Temminck’s Stint (Calidris temminckii) and Terek Sandpiper (Xenus cinereus) using microsatellites and sequence data from the mitochondrial control region and cytochrome oxidase I gene. I compared these regionally endangered species to other waders with varying evolutionary histories,
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Atrux-Tallau, Nicolas. "Mise au point et étude de l’activité thérapeutique d’une préparation cicatrisante." Thesis, Lyon 1, 2010. http://www.theses.fr/2010LYO10047.

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La peau, organe le plus étendu du corps humain, réalise une barrière entre l’environnement et le milieu interne préservant ainsi l’homéostasie. De nombreuses fonctions sont assurées par le tégument telles une modulation des échanges thermiques, une barrière physique, chimique et immunitaire contre l’entrée des composés et microorganismes exogènes mais également contre la perte des substances du milieu interne. L’altération de la surface cutanée et donc de ses fonctions, engendre un processus complexe de réparation qui vise à restaurer le système. Lors de ce travail de thèse des outils biophysi
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41

Bryer, Alan. "Pseudotumor cerebri (with special reference to visual loss)." Master's thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/26342.

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AIMS OF STUDY: 1. To analyse the patients . who have been treated at Groote Schuur Hospital over the last seven years for Pseudotumor Cerebri. 2. To document the clinical features of this group of patients. 3. To determine the visual prognosis of this group. 4. To assess the forms of treatment that have been used in this group. 5. To review the literature with regard to: a) a comparison of the results of other studies with the present one. b) the pathophysiology of the condition. c) treatment of the syndrome. d) the visual prognosis of the syndrome.
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42

Martins, Thais Kubik. "Determinantes ecológicos do risco de extinção: abundância local, amplitude de nicho, capacidade de dispersão e a resposta das espécies de pequenos mamíferos à fragmentação florestal no Planalto Atlântico Paulista." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/41/41133/tde-19042012-101419/.

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Alterações antrópicas nos ecossistemas, em especial a perda e a fragmentação de habitat, são consideradas as principais causas do grande aumento nas extinções de espécies nas últimas décadas. Uma vez que o risco de extinção varia grandemente entre as espécies, os determinantes ecológicos associados à chance de extinção têm sido um tema central e muito debatido na literatura ecológica. Atributos ecológicos relacionados à raridade, como amplitude de nicho e abundância local, e a capacidade de dispersão são recorrentemente citados na literatura como determinantes do risco de extinção local. A par
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43

Silva, Gabriela Bueno Bittencourt. "Comunidades de Anf?bios Anuros Insulares do Litoral Sudeste do Brasil: Composi??o Taxon?mica e Rela??es com a Hist?ria de Forma??o das Ilhas." Universidade Federal Rural do Rio de Janeiro, 2011. https://tede.ufrrj.br/jspui/handle/jspui/1150.

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Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2016-08-03T11:52:14Z No. of bitstreams: 1 2011 - Gabriela Bueno B. Silva.pdf: 16499028 bytes, checksum: f77bf195f420f4227c29b60a75895d0d (MD5)<br>Made available in DSpace on 2016-08-03T11:52:14Z (GMT). No. of bitstreams: 1 2011 - Gabriela Bueno B. Silva.pdf: 16499028 bytes, checksum: f77bf195f420f4227c29b60a75895d0d (MD5) Previous issue date: 2011-04-15<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior, CAPES, Brasil.<br>BITTENCOURT-SILVA, Gabriela Bueno. Insular Anuran (Amphibia) Communities of the Southeast Coast of Brazil:
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44

Dahlerup, Nina. "Effects of site quality and surrounding landscape on bryophytes and brackets on logs in woodland key habitats." Thesis, Linköping University, Department of Physics, Chemistry and Biology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-54183.

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<p>A tool for management and conservation of valuable forests in Sweden are WKH:s. In this study WKH:s different in size, connectivity, amount of dead wood and quality of logs were investigated for species richness of bryophytes and brackets on coniferous logs. The aim was to clarify which scales and features that was important for the diversity of species as well as for individual species. The results showed that the amount of dead wood was most important on the site scale, and some species were affected at the landscape scale, a positive effect of valuable tracts. On the scale of individual
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Alderton, Emily. "'Ghost ponds' : resurrecting lost ponds and species to assist aquatic biodiversity conservation." Thesis, University College London (University of London), 2017. http://discovery.ucl.ac.uk/1571783/.

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Over the last century, around half of all ponds and small wetlands have been lost globally, predominantly from agricultural regions. These losses present a major conservation challenge for aquatic biodiversity and habitat connectivity. While the creation of new ponds is widely advocated as a means of restoring some of these lost habitats, this thesis presents an alternative approach – the resurrection of ‘ghost ponds’, historic ponds in-filled during agricultural intensification. Many aquatic organisms have evolved dormant propagules for surviving periods of habitat desiccation, and can remain
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46

Monteiro, Lara de Macedo. "Planejamento para a conservação de plantas ameaçadas no cerrado brasileiro." Universidade Federal de Goiás, 2017. http://repositorio.bc.ufg.br/tede/handle/tede/7683.

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Submitted by Franciele Moreira (francielemoreyra@gmail.com) on 2017-08-17T18:33:27Z No. of bitstreams: 2 Dissertaçao - Lara de Macedo Monteiro - 2017.pdf: 68300760 bytes, checksum: ba7fbce35b9ab3e46180337ae3129580 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-08-18T12:02:30Z (GMT) No. of bitstreams: 2 Dissertaçao - Lara de Macedo Monteiro - 2017.pdf: 68300760 bytes, checksum: ba7fbce35b9ab3e46180337ae3129580 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (M
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Macker, Julie. "Childhood Hearing Loss and its Stress on Hearing Families." ScholarWorks, 2015. https://scholarworks.waldenu.edu/dissertations/1413.

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Childhood disability increases parental stress. Research on the laterality of childhood hearing loss or presence of a cochlear implant(s) as it relates to stress in hearing parents was limited before this study. The purpose of this quantitative study was to identify relationships between the independent variables of laterality (unilateral and bilateral) of a childhood hearing loss or presence of a cochlear implant(s) and the dependent variable of stress in hearing parents. Family systems theory provided a framework for viewing each member of the family as a part of a whole, whose life events,
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48

Delaney, Jacci Marie. "The specter of sentimentality." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406237101.

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Stegman, Robin Fern. "Hearing Parents of Children With Hearing Loss: Perceptions of the IEP Process." ScholarWorks, 2016. https://scholarworks.waldenu.edu/dissertations/2336.

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This phenomenological study investigated the nature and extent of the support parents received during IEP development. The study was informed by Bronfenbrenner's ecological systems theory. Participants, located in a Northeastern state, were 10 hearing parents of children who had been diagnosed with hearing loss at birth and were between ages 5 and 12. Data were in-depth interviews that were analyzed, coded, and organized into themes using an inductive approach to analysis informed by Hatch. Results indicated that parents believed they needed more guidance on what to expect during the first IEP
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50

Mullins, Lisa Moses. "Hearing Health in Utah Special Olympics Athletes Compared to Special Olympics Athletes Worldwide: A Prevalence Study in Individuals with Intellectual Disabilities." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1296.pdf.

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