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Dissertations / Theses on the topic 'Rarity'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Pritt, Jeremy Joseph. "Defining rarity and determining the mechanisms of rarity for North American freshwater fishes." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/31696.

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Conserving rare species and protecting biodiversity depends on sound information on the nature of rarity. Rarity is multidimensional, presenting the need for a quantitative classification scheme by which to label species as rare or common. I defined rarity for freshwater fishes based on the range extents, habitat breadths, and site abundance and examined the relationship between these dimensions of rarity and imperilment. Imperiled fishes were most often rare by all three dimensions, whereas undesignated species were most often common by all three dimensions. Next, I examined the effect of

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2

Johnson, Jana Joan. "Butterflies, rarity, and conservation practices." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1692119141&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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3

Dalrymple, Sarah. "Rarity and conservation of Melampyrum sylvaticum." Thesis, University of Aberdeen, 2006. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=128181.

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<i>Melampyrum sylvaticum</i> (small cow-wheat) is a hemiparasitic annual of boreal-montane regions of Europe. The Species Action Plan recommended that in addition to protecting extant populations, by 2010 there should be an additional five populations that have been created with the aim of enhancing greater genetic diversity of the species. Consequently this project was set up in order to provide the ecological knowledge required to meet such targets. There are various management options available to conservationists looking to prevent <i>Melampyrum sylvaticum’s</i> extinction from the UK bu

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4

Webb, Thomas James. "Evolutionary causes and consequences of rarity." Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251266.

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5

Lennard, Christopher James. "The causes of avian extinction and rarity." Master's thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/20042.

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Bibliography: pages 144-153.<br>Biological extinction rates have escalated by as much as 1000 times the background extinction rate over the last 1500 years, causing concern over the long-term survival of many species. Avian extinctions since 1600 have been well documented relative to other taxa, as have current levels of avian threat. This study analyses avian extinctions post-1600 and current threats in an attempt to develop some predictive capacity about which avian taxa should be awarded the highest conservation priority. Analyses performed include examinations of the causes of avian extinc

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6

Hoffsten, Per-Ola. "Rarity in boreal stream insects : patterns, causes and consequences /." Doctoral thesis, Umeå University, Ecology and Environmental Science, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-142.

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<p>Patterns of site occupancy among boreal stream insects were studied in central Sweden with focus on sparsely distributed species and the role of dispersal and niche limitations.</p><p>In the study of dispersal limitation, I found that effects of an extraordinarily harsh winter in small to medium-sized streams were strongest in sites located in small streams and far from lake outlets. Species richness and the total abundance of macroinvertebrates and trout returned to pre-disturbance levels after three years. However, some species showed slow recolonization and the proportion of holoaquatic

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7

Rustage, Sarah Elizabeth. "Correlates of rarity in UK bumblebee (Bombus spp.) populations." Thesis, University of Plymouth, 2015. http://hdl.handle.net/10026.1/3372.

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The decline of bumblebee (Bombus spp.) populations in the UK and worldwide has been well reported. It has been generally assumed that such declines result in the genetic impoverishment of some species, potentially leading to reduced ﬁtness and increased extinction risk. This study tested the fundamental assumption linking population fragmentation with ﬁtness, in a model system of two Bombus species native to the UK. Bombus monticola has declined signiﬁcantly in range across the UK in recent years and occupies fragmented upland areas, while Bombus pratorum has remained abundant and widespread o

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8

Xiang, Lan. "Interesting Association Rules Mining Based on Improved Rarity Algorithm." Thesis, Mittuniversitetet, Avdelningen för informationssystem och -teknologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-35320.

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With the rapid development of science and technology, our society has been in the big data era. In human activities, we produce a lot of data in every second and every minute, what contain much information. Then, how to select the useful information from those complicated data is a significant issue. So the association rules mining, a technique of mining patterns or associations between itemsets, comes into being. And this technique aims to find some important associations in data to get useful knowledge. Nowadays, most scholars at home and abroad focus on the frequent pattern mining. However,

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9

Pilgrim, Emma Susan. "The ecology of rarity : an experimental study using arable weeds." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404578.

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10

Simmons, Mark Trevor. "Vegetation, diversity and rarity on the Cape Peninsula, South Africa." Master's thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/9668.

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Bibliography: leaves 93-107.<br>The Cape Peninsula, (471 km²) with over 2285 vascular plant species, is characterised by the combination of a diversity of habitats supporting a mosaic of vegetation types. This study attempts to describe and explain some of the determinants of species pattern and distribution. The first part of this thesis compares a simple vegetation classification, derived from visual examination of dominant species and environmental characteristics, with the result of a multivariate classification derived from the analysis of an extensive database (835 plots, 833 species).

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11

Handley, Richard John. "Determinants of rarity in a dioecious annual macrophyte, Najas marina L." Thesis, University of East Anglia, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327542.

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12

Walker, Jonathan S. "Feeding ecology and rarity of frugivorous birds in tropical rain forest." Thesis, Manchester Metropolitan University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400944.

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13

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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14

Rebelo, Anthony G. "The preservation of the Cape flora : status, causes of rarity, ideals and priorities." Doctoral thesis, University of Cape Town, 1992. http://hdl.handle.net/11427/14229.

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Includes bibliographies.<br>The Cape Floristic Region (CFR), covering 90 000 km2, comprises one of the world's six floral kingdoms. With 8600 species, of which 68 per cent are endemic, it ranks amongst the richest of temperate and tropical floras. Although 19 per cent of the CFR occurs in nature reserves, by far the majority of the preserved area comprises Mountain Fynbos. Only 0.5 and 3 per cent of the original extent of Renoster Shrub/and Lowland Fynbos is preserved, respectively. In this study Fynbos vegetation is identified as the richest habitat for Red Data Book (RDB) plant, freshwater f

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15

Mugodo, James, and n/a. "Plant species rarity and data restriction influence the prediction success of species distribution models." University of Canberra. Resource, Environmental & Heritage Sciences, 2002. http://erl.canberra.edu.au./public/adt-AUC20050530.112801.

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There is a growing need for accurate distribution data for both common and rare plant species for conservation planning and ecological research purposes. A database of more than 500 observations for nine tree species with different ecological and geographical distributions and a range of frequencies of occurrence in south-eastern New South Wales (Australia) was used to compare the predictive performance of logistic regression models, generalised additive models (GAMs) and classification tree models (CTMs) using different data restriction regimes and several model-building strategies. Environme

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16

Hopkins, Graham Wyn. "Rarity of tree aphids with particular reference to the birch aphid Monaphis antennata (Kaltenbach)." Thesis, University of East Anglia, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338048.

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17

Henfield, Malik S. ""I am a rarity in my school" hidden obstacles for African Americans in gifted education /." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1155752723.

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18

McKenna, David J. "Demographic and ecological indicators of rarity in a suite of obligate-seeding Persoonia (Proteaceae) shrubs." Access electronically, 2007. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20080131.142010/index.html.

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19

Mills, Michelle Holland. "Correlates of rarity in the flora of North America : life histories, habitats, and geographic distributions /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2003. http://uclibs.org/PID/11984.

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20

Yenni, Glenda Marie. "Self-limitation as an explanation for species' relative abundances and the long-term persistence of rare species." DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/1958.

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Much of ecological theory describes species interactions. These interactions often play an important theoretical role in facilitating coexistence. In particular, rarity in ecological communities, though often observed, provides a significant challenge to theoretical and empirical ecologists alike. I use a plant community model to simulate the effect of stronger negative frequency dependence on the long-term persistence of the rare species in a simulated community. This strong self-limitation produces long persistence times for the rare competitor, which otherwise succumb quickly to stochastic

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21

Martin, Lynn. "Factors contributing to the rarity and threatened status of the Large Copper butterfly (Lycaena dispar batavus)." Thesis, Keele University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341238.

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The Large Copper butterfly, Lycaena dispar, is extinct in Britain and rapidly declining in the rest of Europe, due predominantly to loss of its wetland habitats. In the Netherlands the sub-species L. d. batavus is at the edge of its range in Northern Europe and, as with most marginal butterflies, has more specialised food plant and habitat requirements than the core populations of L. d. ruti/us. The aim of this study was to investigate some of the reasons for its continuing rarity, particularly looking at the reasons for its specialisation on Rumex hydrolapathum in a fen land habitat, whilst L

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22

Cioffi, Rebekah Katie Elizabeth. "Understanding rarity and latitudinal range relationships in European diving beetles (Dytiscidae) using metabolic plasticity and immunocompetence." Thesis, University of Plymouth, 2017. http://hdl.handle.net/10026.1/9480.

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Whilst the geographical range of species is a fundamental unit of macroecology and a leading predictor of extinction risk, the evolutionary dynamics of species’ ranges remain poorly understood. In some aquatic beetles, thermal niche has been shown to be related to both the relative range size and position of congeners but whether other physiological niche parameters play a role is unknown. Here, immunocompetence and metabolic plasticity were related to biogeography in these insects. Immunocompetence was first compared within a rare-common pair of Hydroporus species, finding species-specific im

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23

Munagani, Indira Priya Darshini. "Mining Rare Features in Fingerprints using Core points and Triplet-based Features." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/24784.

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A fingerprint matching algorithm with a novel set of matching parameters based on core points and triangular descriptors is proposed to discover rarity in fingerprints. The algorithm uses a mathematical and statistical approach to discover rare features in fingerprints which provides scientific validation for both ten-print and latent fingerprint evidence. A feature is considered rare if it is statistically uncommon; that is, the rare feature should be unique among N (N>100) randomly sampled prints. A rare feature in a fingerprint has higher discriminatory power when it is identified in a prin

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24

Knapp, Sonja. "Plant biodiversity in urbanized areas analyses of plant functional traits in space and time, plant rarity and phylogenetic diversity." Wiesbaden Vieweg + Teubner, 2009. http://d-nb.info/995192685/04.

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25

Kilani, Asma. "Le rôle des restrictions temporelles de vente sur l'évaluation de l'offre et l'intention d'achat : analyse par méthode des scénarios." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAB014/document.

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Le rôle des restrictions de vente sur l’évaluation de l’offre et l’intention d’achat reste controversé. La littérature marketing est divisée à ce sujet et met en avant différents cadres conceptuels et théories susceptibles d’expliquer les effets de ces restrictions. Face à ce manque d’unanimité dans la littérature et dans un contexte où la rentabilité des promotions de vente n’est pas établie, cette thèse vise une meilleure compréhension de l’impact des limites temporelles sur l’évaluation d’une offre promotionnelle de vente et l’intention d’achat du consommateur. Cette étude a été réalisée à

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26

Line, Eric R. "Effects of Landscape Aggregation and Landscape Conversion on Bird Diversity in Ohio from 2013-2017." Bowling Green State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1621604319860423.

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27

McCue, Kimberlie A. "The ecological genetics of rarity : a study of genetic structure, inbreeding and seed bank dynamics in a rare annual plant /." free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9841324.

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28

Rajapakshe, Rajapakshe Pathirennehelage Villaddara Gamage Subhashi Wasanthi. "Investigation of the Impact of Hydrological and Thermal Stress on Germination Response to Identify Ecological Filters of Rarity and Endemism." Thesis, Curtin University, 2021. http://hdl.handle.net/20.500.11937/88249.

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Thermal stress and water stress are two major environmental variables that affect seed germination, particularly in arid ecosystems. This study investigated the role of thermal stress and water stress in shaping the germination niche of a diverse group of plants endemic to rocky outcrop habitats of Western Australia, and quantified germination responses in terms of ecological and evolutionary implications.

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29

Bender, Gomes Mariana. "La structuration des communautés de poissons de récif à différentes échelles : de la taxonomie aux fonctions." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20073/document.

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Comprendre les mécanismes d'assemblages des communautés est l'une des principales questions en écologie et biogéographie. Elle est également essentielle pour prédire les conséquences des changements globaux sur la distribution future de la biodiversité. Les communautés écologiques sont la résultante de facteurs interagissant à plusieurs échelles spatiales et temporelles. En outre, ces processus peuvent affecter différemment les composantes taxonomique, fonctionnelle et phylogénétique de la biodiversité. Nous étudions ici les processus écologiques qui structurent les communautés de poissons de

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Barreto, Bruno de Souza. "Biogeografia da conservação de morcegos no cerrado brasileiro." Universidade Federal de Goiás, 2008. http://repositorio.bc.ufg.br/tede/handle/tede/3178.

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Submitted by Erika Demachki (erikademachki@gmail.com) on 2014-09-25T18:57:04Z No. of bitstreams: 2 Bruno de Souza Barreto - 2008 - Dissertação.pdf: 2633509 bytes, checksum: 9a1040f27931399225f28b393e640b6e (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2014-09-26T11:43:42Z (GMT) No. of bitstreams: 2 Bruno de Souza Barreto - 2008 - Dissertação.pdf: 2633509 bytes, checksum: 9a1040f27931399225f28b393e640b6e (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5

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Sgarbi, Luciano Fabris. "Determinantes da raridade das espécies e seus efeitos sobre a estrutura de comunidades biológicas." Universidade Federal de Goiás, 2018. http://repositorio.bc.ufg.br/tede/handle/tede/8612.

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Submitted by JÚLIO HEBER SILVA (julioheber@yahoo.com.br) on 2018-06-26T12:12:21Z No. of bitstreams: 2 Tese - Luciano Fabris Sgarbi - 2018.pdf: 35934499 bytes, checksum: 6fac6e45ed4a58506a9e7aa6a545f73b (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2018-06-27T11:45:11Z (GMT) No. of bitstreams: 2 Tese - Luciano Fabris Sgarbi - 2018.pdf: 35934499 bytes, checksum: 6fac6e45ed4a58506a9e7aa6a545f73b (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made available

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32

Fox, Call Christina Elizabeth. "Population Structure, Genetic Diversity, Geographic Distribution, and Morphology of Two Boechera (Brassicaceae) Parental Species (Boechera thompsonii and Boechera formosa) and of Their Resultant Hybrid Boechera duchesnensis." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6233.

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Background: Over the relatively short period of its evolutionary history, Boechera (Brassicaceae) has undergone rapid radiation that has produced 70+ morphologically distinct, sexual diploids. However, reproductive isolation has moved more slowly than morphological divergence in this group and the diploids appear to hybridize frequently where they coexist. Boechera duchesnensis appears to be the result of hybridization between its putative parents Boechera thompsonii and Boechera formosa. Objectives: The objectives of this study are to (i) analyze and document genetic diversity patterns in the

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33

Müller, Gregor Simon [Verfasser]. "Testing the relative roles of competition and plant-soil feedback in explaining commonness and rarity of alien and native plant species / Gregor Simon Müller." Konstanz : Bibliothek der Universität Konstanz, 2017. http://d-nb.info/1138566349/34.

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34

Craig, Tracy-Ann. "Kidney stone rarity in South Africa's black population : investigation of the biochemical and physico-chemical properties of Tamm Horsfall Mucoprotein as a possible contributory factor." Doctoral thesis, University of Cape Town, 2004. http://hdl.handle.net/11427/7443.

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Includes bibliographical references.<br>Tamm Horsfall mucoprotein (THP) is a powerful inhibitor of calcium oxalate crystallisation. Since urolithiasis in South African blacks is extremely rare, this study was undertaken to compare the relative inhibitory and biochemical properties of this protein in South African black and white healthy and stone—forn1ing male subjects. THP was isolated by salt precipitation, puriﬁed by column chromatography and veriﬁed by electrophoresis on SDS-polyacrylamide gels. MALDI-TOF mass spectroscopy was used to determine the molecular weights of the protein from eac

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35

Iannuzzi, Victoria N. "School Shootings in the United States from 1997 to 2012: A Content Analysis of Media Coverage." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6866.

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This study is a content analysis of news articles of school shooting incidents that occurred within the United States between 1997 and 2012. This paper was designed to (a) address the current profile of school shooting offenders and offenses, (b) assess a proposed typology of school shootings, (c) consider common case processing characteristics for offenders of school shootings incidents, and (d) address the potential for offender and offense characteristics to affect the amount of media coverage an incident receives. The database of “Major School Shootings in the United States Since 1997” by

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36

BULINSKI, KATHERINE VICTORIA. "Relationship of sample-level properties to biodiversity at multiple scales: analyses of Upper Ordovician and Cenozoic ecological and latitudinal gradients." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1212001254.

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37

Haydu, Kristie. "Mapping Plant Biodiversity Hotspots at the County Scale: A New Tool for Establishing Resource Conservation Strategies." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/749.

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Myers first identified the world’s 25 biodiversity hotspots and pioneered innovative ideas about the usefulness of biodiversity models for establishing long-term resource conservation strategies at global scales. Since Myers, most of the subsequent studies using hotspot science for biodiversity modeling have used large spatial scales like countries, provinces or states, and other biogeoraphic regions. The California Floristic Province continues to be one of the recognized global biodiversity hotspots. Our study site, San Luis Obispo County is within this hotspot and we created a map of plan

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Williams, Aleida Helen. "An ecophysiological comparison of rare ironstone endemics and their common congeners." University of Western Australia. School of Plant Biology, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0241.

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[Truncated abstract] In south-western Australia a rare plant community occurs on shallow soils overlaying massive ironstone rock. These 'ironstone communities' are open shrublands, which are subject to extremes in drought and solar radiation and support many rare and endemic species. The restricted distribution of many of these species may be related to their high degree of specialisation to this harsh habitat and their inability to respond plastically to different environmental conditions. Indeed, earlier work has shown that ironstone Hakea species (Proteaceae) have a specialist root-system m

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Nakamura, Nodoka. "Dissecting the Japanese hotspot : refining evaluation of biodiversity in forests at different scales in the Japanese landscape." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:c625c75e-b983-48ab-b8c8-fbe0cea0d53e.

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Japan is one of the world’s 34 biodiversity hotspots, according to Conservation International (CI). The methods used by various organisations to define priorities differ, however, and all have weaknesses when trying to identify hotspots at finer resolutions. The goal of this thesis is to investigate how biodiversity hotspots in Japan could be revealed and mapped in order to encapsulate conservation elements of biodiversity in practical ways and at various scales. Bioquality is a term that emphasises the concentration within a community of elements of biodiversity with high conservation value.

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Palazy, Lucille. "La chasse aux trophées : menace ou alliée pour les espèces rares." Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10020/document.

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La chasse aux trophées, type de chasse récréative dont l'objectif premier est de prélever un trophée d'intérêt, est un sujet très controversé. Cette activité est potentiellement génératrice d'un effet Allee anthropogénique (EAA). Ce processus démographique stipule que la valorisation de la rareté d'une espèce peut stimuler son exploitation et mener à son extinction. L'objectif de ce travail a été de tester le risque d'EAA dans la chasse aux trophées. Nous avons mis en évidence que les espèces rares ont une forte valeur économique dans la chasse aux trophées, quelque soit la taille du trophée,

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Kondratyeva, Anna. "Measuring inter-specific diversity. Benefits of species originality indices in community ecology and conservation biology." Thesis, Paris, Muséum national d'histoire naturelle, 2019. http://www.theses.fr/2019MNHN0012.

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L'humanité dépend fortement de la biodiversité et des services qu'elle nous fournit. Pour prévenir la perte de biodiversité et établir des relations durables avec la nature, l'humanité doit gérer et protéger des ressources naturelles. Le problème de "what to protect" n'est pas nouveau, mais il est devenu aujourd'hui plus important que jamais et pourrait être résolu par une utilisation appropriée des mesures de la biodiversité. De nombreuses mesures de biodiversité ont été élaborées au cours des quatre dernières décennies avec l'abondance des espèces comme l'une des unités centrales. Cependant,

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42

Lin, Wuying. "Comparative Reproductive Biology of a Rare Endemic Orchid and its Sympatric Congeners in Southwestern China." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/570.

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Comparative studies on endangered species and their more common congeners can shed light on the mechanism of species rarity, and enable conservationists to formulate effective management strategies. I compared the breeding and pollination systems of the endangered Geodorum eulophioides and its two more common sympatric congeners in subtropical China. Geodorum eulophioides and G. recurvum were self-compatible, both depending on Ceratina cognata for fruit production, while G. densiflorum can autonomously self. Although the floral visitation frequency of G. eulophioides was the highest among the

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Vanderplank, Sula E. "The Vascular Flora of Greater San Quintín, Baja California, Mexico." Scholarship @ Claremont, 2010. http://scholarship.claremont.edu/cgu_etd/2.

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The plants of San Quintín (Baja California, Mexico) were documented through intensive fieldwork and the collection of herbarium specimens to create a checklist of species. This region is home to a diverse flora with high levels of local endemism and many rare plants. The flora documented in this study was compared to historical records from the region and shows the impact of agriculture and urbanization on the plants, including several extirpated species. A study of the perennial vegetation using a 1 km grid provides species distribution data for 140 native species, which were assessed to high

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Ferreira, Tiago de Souza. "Raridade de espécies arbóreas em fragmentos florestais no Planalto Sul Catarinense." Universidade do Estado de Santa Catarina, 2013. http://tede.udesc.br/handle/handle/1919.

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Made available in DSpace on 2016-12-12T20:12:28Z (GMT). No. of bitstreams: 1 PGEF13MA006.pdf: 206072 bytes, checksum: 949b28c15cbcab9aa759abd7c53e055a (MD5) Previous issue date: 2013-10-04<br>This study was conducted in different fragments in Planalto Sul Catarinense distributed in along an altitudinal gradient. The objective of the first chapter was to identify local rarity patterns and its proportions, basing on characteristics of habitat range and population size. For this, a vegetational matrix of tree species abundance, from 11 sampling units distributed in different forest fragments

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Manawaduge, Chapa Gimhani. "Conservation biology of threatened native olives (Notelaea Spp., Oleaceae) in Southern Queensland." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/208105/1/Chapa%20Gimhani_Manawaduge_Thesis.pdf.

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Due to the limited resources available, it is necessary to prioritise the conservation action for taxa most at risk of extinction. This study investigated the systematics, population genetics and life-history traits of the two least studied threatened native olive species (Notelaea ipsviciensis and N. lloydii) in Australia, to improve our knowledge of their conservation biology. The results obtained from the genome wide molecular, morphological and comparative life-history trait analysis between rare and common Notelaea spp. in southern Queensland revealed that the taxonomic status of these tw

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Hong, Ellen. "Understanding the Antecedents of Perceived Authenticity to Predict Cultural Tourists’ Behavioral Intention: The Case of Cambodia’s Angkor Wat." Ohio University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1620270040944891.

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Deppa, Ntsapokazi. "Rarity of kidney stones in South Africa's black population : studies of urinary macromolecules, crystal matrix extract containing osteopontin, and bone turnover markers in urine and serum from black and white subjects as a key to understanding this paradox." Doctoral thesis, University of Cape Town, 2007. http://hdl.handle.net/11427/19147.

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The work described in this thesis was undertaken to investigate physicochemical, biochemical and physiological factors contributing towards the rarity of kidney stone disease in the South African black population. Healthy, age-matched male subjects from the black and white population groups were recruited for this purpose. In several of the studies, subjects followed a standardized diet and were required to provide 24 hour urine collections. These were analyzed for sodium, potassium, calcium, oxalate, uric acid, citrate, chloride, magnesium, phosphate, sulphate and creatinine using standard la

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Teshima, Fernanda Ayumi. "Ecologia das assembleias de peixes do Parque Estadual de Jurupará (PEJU,SP)." Universidade Federal de São Carlos, 2013. https://repositorio.ufscar.br/handle/ufscar/1527.

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Made available in DSpace on 2016-06-02T19:26:22Z (GMT). No. of bitstreams: 1 TESHIMA_Fernanda_2013.pdf: 3077520 bytes, checksum: 0836656eac19598a1f39d0a0a1534e2b (MD5) Previous issue date: 2013-09-13<br>Financiadora de Estudos e Projetos<br>The general aim of this thesis is to understand the fish assemblages of headwater and small streams of Jurupará State Park, a protected area located in São Paulo State. Located among other four protected areas, the park functions as a connector and contributes to the conservation of the Atlantic Forest and Upper Juquiá River basin, located in the Ribeir

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Marcilhac, Vincent. "Le luxe alimentaire français. Histoire et géographie d’une singularité." Thesis, Paris 4, 2011. http://www.theses.fr/2011PA040203.

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La prééminence française en matière de luxe alimentaire est souvent présentée comme une évidence. Pourtant il a existé et il existe d’autres cultures du luxe alimentaire dans le monde. Alors, pourquoi et comment la culture française du luxe alimentaire s’est-elle différenciée des autres en s’affirmant et en étant reconnue comme singulière ? Derrière l’apparente évidence, Il importe de démontrer et d’expliquer l’hypothèse d’une singularité française en matière de luxe alimentaire. Celle-ci est aujourd’hui remise en cause, en raison même de l’extension de son marché liée à l’industrialisation de

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Pais, Hirigoyen Pablo. "Unconventional Supersymmetry, Massless Rarita-Schwinger Theory and Strained Graphene." Doctoral thesis, Universite Libre de Bruxelles, 2017. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/258427.

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In this Thesis, we propose to analyze three different aspects of Fundamental Physics.The first part is devoted to the detailed study of what is called "unconventional supersymmetry" in three and four dimensions for Abelian and non-Abelian internal groups. We show the dynamical content of the odd-dimensional theory, counting at the same time the local degrees of freedom for some particular sectors of the phase space. In the non-Abelian three-dimensional case, some black hole solutions are presented, including their Killing spinors. In four dimensions, the supersymmetry is broken explicitly and

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