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Dissertations / Theses on the topic 'Is elevated to species status'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

Watson, Julie. "How will elevated atmospheric COâ†2 affect species-rich grasslands?" Thesis, University of York, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387182.

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2

Runnels, Cora. "Phylogeography and Species Status of Ramphogordius sanguineus." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/3165.

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Ramphogordius sanguineus (Rathke 1799) is a gregarious nemertean with a worldwide distribution and found mainly on hard substrates associated with mussels, oysters and other organisms of the fouling community. Asexual reproduction occurs by spontaneous fragmentation and only anecdotal accounts of sexual reproduction exist. This is the first phylogeographic study of R. sanguineus as well as the first species delimitation analyses employing DNA markers. Analysis of the mitochondrial gene nad6 and nuclear ISSR markers showed little diversity among geographically widespread populations, but AMOVA

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3

Joel, Geeske. "Responses of grassland ecosystems to elevated CO₂: single and multi-species components /." May be available electronically:, 2000. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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4

Zorgani, Abdul Aziz A. "Secretor status and immune response to Neisseria species." Thesis, University of Edinburgh, 1993. http://hdl.handle.net/1842/20320.

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The objectives of the study were (1) to assess total and specific antibodies in sera and saliva of secretors and non-secretors with reference to carriage of meningococci and smoking: (2) to assess the ability of saliva from secretors and non-secretors to inhibit bacterial binding to epithelial cells; (3) to assess bactericidal activity of sera from secretors and non-secretors. As a preliminary step, a sensitive precise and accurate enzyme linked immunosorbent assay (ELISA) was developed to assess the total and specific levels of IgA, IgM and IgG in serum and saliva. In a parallel trial, antibo

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5

Lamen, Sabah Hassan. "Effect of elevated carbon dioxide on seedling morphology and anatomy in seven herbaceous species." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ27584.pdf.

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6

Snowden, Simon. "The impact of growth in elevated carbon dioxide on Flaveria species representing different photosynthetic modes." Thesis, University of Sheffield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401244.

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7

Konkle, Samantha N. "Status of Amaranthus Species in Ohio Crop Production." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437400544.

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8

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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9

Vickers, Adrian David. "The evaluation of woodland status by means of botanical indicator species." Thesis, Sheffield Hallam University, 2001. http://shura.shu.ac.uk/20477/.

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The aims of this study were to evaluate the use of botanical species as indicators of antiquity and environmental continuity and also to provide greater understanding of the processes responsible for the formation of woodland plant communities. In order to address this, the research was undertaken along four main themes: 1) Plant colonisation rates. 2) Plant species lists for woodland sites. 3) The impact of surveyor effort and strategy in devising species lists for sites. 4) The response of a typical woodland plant to management. 5) Plant communities in an area of Scottish pine forestIn parti

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10

Keesling, Ashley Rose. "Reevaluating the species status of the Southern Ghost Pipe, Monotropa brittonii." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1587574637151549.

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11

Estopinan, Joaquim. "A predictive approach to determining the joint conservation status of species." Electronic Thesis or Diss., Université de Montpellier (2022-....), 2023. http://www.theses.fr/2023UMONS062.

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Les modèles de distribution d'espèces (SDMs) ont pour but d'apprendre les préférences environnementales des espèces et de projeter leur distribution géographique.Les récentes percées dans le domaine de l'apprentissage profond, associées à l'explosion des données sur la biodiversité, ont conduit au développement d'une nouvelle génération de modèles appelés deep-SDMs.Dans cette thèse, nous explorons leur application pour la conservation de la biodiversité.Tout d'abord, nous évaluons la contribution des séries temporelles d'images satellites en tant que covariables environnementales.La capture de

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12

Youssif, Claud. "Dyngbaggarnas status i östgötska betesmarker : vad styr deras förekomst?" Thesis, Linköpings universitet, Biologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-166638.

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Dung beetles is a group of coprophagous beetles in the family Scarabaeidae. Dung beetles have an important function by improving nutrient circulation and biological control of parasites. Dung is a short-lived resource, making dung beetles tied to habitats continuously grazed. Decline in pasture combined with shorter grazing seasons has resulted in a decrease in available dung. Other reasons can be the use of chemicals to control internal parasites on the grazing animals. This has contributed to the fact that half of the dung beetles in Sweden are endangered. The aim of the present study was to

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13

Jones, Trevor A. "The effects of seed size on seedling growth response to elevated CO¦2 in four conifer species." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ62346.pdf.

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14

Schwarzlander, Markus. "The Response to Mitochondrial Reactive Oxygen Species and Redox Status in Plants." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504582.

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15

Buyarski, Christopher R. "Photosynthetic capacity of deciduous tree species growing in the Duke FACE experiment with elevated CO₂ and N fertilization." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5677.

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16

Phillips, Marcus Jonathan Angus. "Effects of species and placement of neighbours on the ability to scale plant responses to elevated COâ†2." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266022.

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17

Gao, Ling. "Modulation of the intracellular redox status in retinal endothelial cells and pericytes by elevated glucose and stress agents." Thesis, King's College London (University of London), 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429461.

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18

Takahashi, Nobuaki. "TRP channels as sensors of cellular redox status." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/131892.

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19

Streeter, Tania C. "Role of Zn nutritional status on infection of Medicago species by Rhizoctonia solani /." Title page, contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09APSP/09apsps915.pdf.

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20

Myers, Victoria Joanne. "Habitat utilisation by the white rhinoceros and status of the species in Namibia." Thesis, University of Hull, 1998. http://hydra.hull.ac.uk/resources/hull:3888.

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This study investigated habitat utilisation of the white rhinoceros (Ceratotherium simum simum) in a semi-arid environment and established the history and current status of the species, following its introduction to Namibia. Most early introductions of white rhinos to private land were not successful due to poaching, over-hunting and poor management. The value of the animals has increased significantly since 1989, which has encouraged farmers to protect and manage rhinos sustainably, and numbers are now increasing. Effective management involves protection from poaching, regular monitoring and

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21

Davids, Virginia. "Elevated levels of low molecular weight substances in the red cells of some mammalian species imply unsuspected antioxidant strategies." Doctoral thesis, University of Cape Town, 2009. http://hdl.handle.net/11427/3162.

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An earlier observation by E.H. Harley (supervisor of this thesis) of curious metabolic anomalies in the red cells of black rhinoceros, and in particular a high free tyrosine level, suggested that a range of unusual, but presumeably physiological, processes might be found in mammalian red blood cells. As a follow-up to this, low molecular weight metabolites were examined in a range of mammalian species, using HPLC-based methods to compare levels in red cells with plasma levels. A remarkable interspecies diversity in red cell HPLC profiles was observed, with the unprecedented accumulation of sub

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22

Rogers, Gordon Stephen, of Western Sydney Hawkesbury University, of Science Technology and Agriculture Faculty, and School of Horticulture. "Influence of N and P nutrition on the responses of wheat and cotton to elevated CO2." THESIS_FSTA_HOR_Rogers_G.xml, 1996. http://handle.uws.edu.au:8081/1959.7/227.

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The atmospheric CO2 concentration is rising. These higher CO2 concentrations will certainly affect growth but may also affect nutrient responses of crop plants. The overall aim of this thesis was to investigate the effect of elevated CO2 on the nitrogen and phosphorus nutrition of two different crop species: wheat and cotton. Once establishing the new nutrient requirements of these crop species at elevated CO2 the study focussed on the interactive effects of elevated CO2 and N supply on growth and leaf N concentrations in cotton and wheat, carbohydrate metabolism, source:sink interactions and

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23

Warwick, Kevin Robert. "Assessment of the response of the chalk grassland community to elevated concentrations of atmospheric carbon dioxide and ozone through the examination of individual species and mixtures of species." Thesis, University of Sussex, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246251.

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24

Page, Michael. "Modulation of root antioxidant status to delay cassava post-harvest physiological deterioration." Thesis, University of Bath, 2009. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512379.

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Cassava ranks seventh in terms of worldwide crop production, providing a staple for over half a billion people. The production of cassava is limited by several factors, with post-harvest physiological deterioration (PPD) of storage roots a major constraint. PPD is a process initiated on harvesting and mediated by reactive oxygen species (ROS) that ultimately renders storage roots unpalatable and unmarketable. It is similar to a conventional plant wound response, but crucially lacks efficient wound repair and down-regulation of stress signalling. Therefore, the strategy utilised here to modulat

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25

Gupte, Anshul. "TARGETING THE METAL CHELATOR D-PENICILLAMINE TO EXPLOIT THE ELEVATED COPPER AND OXIDATIVE STRESS ASSOCIATED WITH CANCER." UKnowledge, 2008. http://uknowledge.uky.edu/gradschool_diss/598.

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The significantly increased copper and oxidative stress levels are characteristic hallmarks of cancer cells. These differences provide a unique opportunity for selective targeting of cancer cells. D-penicillamine (D-pen) has been proposed to generate reactive oxygen species (ROS) in presence of copper. Therefore, these studies were aimed at investigating the potential application of a currently marketed copper chelator, D-pen, as a novel cytotoxic anti-cancer agent. D-pen was shown to produce ROS, specifically hydrogen peroxide (H2O2), in the presence of cupric sulfate through a copper catalyz

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26

Brittain, Ross. "Trophic status, habitat use and climate change impacts on avian species of coastal, Georgia." [Bloomington, Ind.] : Indiana University, 2009. 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:3380064.

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Thesis (Ph.D.)--Indiana University, School of Public and Environmental Affairs, 2009.<br>Title from PDF t.p. (viewed on Jul 19, 2010). Source: Dissertation Abstracts International, Volume: 70-12, Section: B, page: 7462. Adviser: Christopher Craft.

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27

Shakeel, Mohammad Arshad. "The pest status of some invertebrate species associated with white clover Trifolium repens L." Thesis, Queen's University Belfast, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329393.

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28

Hoskins, Elizabeth Anne Hoskins. "Within-species Variation in Cognition in Cichlid Fishes: Influences of Social Status and Personality." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1534697987232761.

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29

King, Caitriona Maria. "An investigation of antioxidant status DNA repair capability and mutation as a function of age in humans." Thesis, University of Ulster, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390064.

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30

Ogawa, Nozomi. "Detection of cellular redox status by transient receptor potential channels." 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/215577.

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31

Fisher, Justin David Lee. "Northern Leopard Frogs in North Dakota: Assessing the Conservation Status of a Widespread Amphibian Species." Diss., North Dakota State University, 2015. http://hdl.handle.net/10365/24879.

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North Dakota?s midcontinent location within the Prairie Pothole Region is widely known for the dense wetlands. These highly productive wetlands are mixed within an agricultural mosaic which places increased pressure on water quality and overall wetland persistence. These threats to wetlands affects other, more common species which are presumed to have healthy populations but lack statewide information. Such is the case with the northern leopard frog (Lithobates pipiens). I examined genetic variation for 41 populations across the state. Genetic diversity was not correlated with latitude,

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32

Kariyawasam, Haputhanthri Kankanamge Tharanga Niroshini. "Taxonomy, distribution and pest status of Plutella species (Lepidoptera: Plutellidae) in Australia and New Zealand." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/116545/1/Tharanga%20Niroshini_Kariyawasam%20Haputhanthri%20Kankanamge_Thesis.pdf.

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Plutella xylostella L. is a global pest of cruciferous crops. A new, closely-related Australian taxon, P. australiana, was identified in 2013, with significant potential impacts on market access and on introduction of biological control agents in Australia. Cytochrome oxidase 1 'barcode' sequencing and comparison of the genitalia of adults collected from 3 states in Australia (including Tasmania) and New Zealand identified significant morphological similarity between the two taxa, and two features that can be used to differentiate adult females of the two taxa. Larval collections identified tw

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33

Lima, Luciano Moreira. "Aves da Mata Atlântica: riqueza, composição, status, endemismos e conservação." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/41/41133/tde-17042014-091547/.

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A Mata Atlântica é considerada um dos ecossistemas mais biodiversos e ao mesmo tempo mais ameaçados do planeta. As aves são apontadas como o grupo de vertebrados com a maior riqueza geral, endemismos e espécies ameaçadas desse domínio. Embora possa ser considerado o domínio natural brasileiro cuja avifauna foi mais intensamente estudada, o conhecimento ornitológico acumulado sobre a Mata Atlântica encontra-se segmentado e altamente disperso, o que acaba por torná-lo sub-utilizável. Embora existam na literatura valores de riqueza e listas de espécies de aves da Mata Atlântica, há uma grande dis

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34

Vaughan, Rebecca. "Health and disease status of Australia's most critically endangered mammal the Gilbert's potoroo (Potorous gilbertii)." Thesis, Vaughan, Rebecca ORCID: 0000-0001-7609-9818 (2008) Health and disease status of Australia's most critically endangered mammal the Gilbert's potoroo (Potorous gilbertii). PhD thesis, Murdoch University, 2008. https://researchrepository.murdoch.edu.au/id/eprint/1693/.

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The Gilbert's potoroo (Potorous gilbertii) is a small marsupial endemic to the Two Peoples Bay Nature Reserve in the south-west of Western Australia. The Gilbert's potoroo is classified as Australia's most critically endangered mammal (IUCN 2006) with an estimated population of only 35 individuals. This thesis examines the health and disease status of the Gilbert's potoroo, presenting a strong case for the relatively new concept of disease as a potential threatening factor and modifier of population decline. Specific diseases, including Cryptococcus, ectoparasitism, endoparasitism, hae

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Vaughan, Rebecca. "Health and disease status of Australia's most critically endangered mammal the Gilbert's potoroo (Potorous gilbertii) /." Vaughan, Rebecca (2008) Health and disease status of Australia's most critically endangered mammal the Gilbert's potoroo(Potorous gilbertii). PhD thesis, Murdoch University, 2008. http://researchrepository.murdoch.edu.au/1693/.

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The Gilbert’s potoroo (Potorous gilbertii) is a small marsupial endemic to the Two Peoples Bay Nature Reserve in the south-west of Western Australia. The Gilbert’s potoroo is classified as Australia’s most critically endangered mammal (IUCN 2006) with an estimated population of only 35 individuals. This thesis examines the health and disease status of the Gilbert’s potoroo, presenting a strong case for the relatively new concept of disease as a potential threatening factor and modifier of population decline. Specific diseases, including Cryptococcus, ectoparasitism, endoparasitism, haem

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36

Koch, Jonathan B. "The decline and conservation status of North American bumble bees." DigitalCommons@USU, 2011. https://digitalcommons.usu.edu/etd/1015.

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Several reports of North American bumble bee (Bombus Latreille) decline have been documented across the continent, but no study has fully assessed the geographic scope of decline. In this study I discuss the importance of Natural History Collections (NHC) in estimating historic bumble bee distributions and abundances, as well as in informing current surveys. To estimate changes in distribution and relative abundance I compare historic data assembled from a >73,000 specimen database with a contemporary 3-year survey of North American bumble bees across 382 locations in the contiguous U.S.A. Bas

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37

Groninger, John William. "Stand dynamics and gas exchange in loblolly pine and hardwood seedling stands : impact of elevated carbon dioxide, water stress and nutrient status /." Diss., This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-08272007-163923/.

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38

Goh, Ee Von. "The status of fish in Malaysian diets and potential barriers to increasing consumption of farmed species." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/52379/.

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The thesis took an interdisciplinary, problem-oriented approach to address the research problem: ’Is farmed fish capable of replacing wild-caught fish in the Malaysian diet?’ The main objectives of the project were to assess current fish consumption habits, evaluate the impacts of these on sustainability of fish stocks and determine whether aquacultured products could be a suitable substitution. A combination of data collection methods was used, namely dietary assessments, systematic literature review, market research interviews and surveys and analysis of electronic and paper-based official r

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39

Prayag, Kervin D. "The effects of elevated [CO₂] and decreased vapour pressure deficit on the nutrient status of maize and wheat plants under well-watered conditions." Master's thesis, University of Cape Town, 2020. http://hdl.handle.net/11427/32525.

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Increases in photosynthetic rates (A), biomass production and grain yield have been measured across a range of C₃ plants under elevated atmospheric [CO₂] ('eCO₂'). However, decreases in the nutritional status of many C₃ plants growing at eCO₂ often occur concurrently with these increases. Several mechanisms have been proposed for these eCO₂-induced decreases, such as dilution effects due to enhanced carbohydrate production, down-regulation of photosynthesis, reduced root development, and decreased transpiration-driven mass flow delivery of nutrients. Reduced mass flow at eCO₂ is generally acce

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Perkins, Vivienne C. "Properdin : cDNA and protein studies across species and analysis of immune effector status in properdin-deficient patients." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362031.

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Matimele, Hermenegildo Alfredo. "An assessment of the distribution and conservation status of endemic and near endemic plant species in Maputaland." Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20995.

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The Maputaland Centre of Endemism (MCE), an area stretching from northern-east KwaZulu-Natal in South Africa to the Limpopo River in southern Mozambique, holds more than 2,500 native plant species. Of those, over 203 are endemic or near endemic to this area. However, the current high human population density in MCE, coupled with high population growth, has increased the pressure on the natural resources of the region and threatens the natural vegetation and plant diversity. Therefore, there is a pressing need to fully understand the threats faced by the Maputaland endemic and near endemic plan

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Linton, Yvonne-Marie. "Characterisation of the South African Culicoides imicola (Kieffer, 1913) species complex, and its phylogenetic status in Europe." Thesis, University of Aberdeen, 1998. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU112148.

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C. imicola has been described as a species complex in South Africa on the basis of taxonomy, with at least seven species world-wide. Phylogenetic validity of five taxa within the Imicola group, namely C. imicola s.s., C. loxodontis, C. bolitinos and two currently unconfirmed species - Culicoides Sp. 30 (tuttifruitti) and Culicoides Sp. 107 (kwagga), were established using mtDNA COI sequence data, which confirmed their identity, not only as separate genetic entities, but also in exact correlation with the sibling species based on morphological and ecological parameters. In addition, the separat

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43

Long, Michael A. "Tree species composition and oak competitive status in upland hardwood stands approaching mid-rotation in southern Illinois /." Available to subscribers only, 2007. http://proquest.umi.com/pqdweb?did=1404346481&sid=1&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Maximova, Ekaterina. "The role of physical activity, obesity and perception of weight status in the prevention of elevated blood pressure in youth: biological and behavioral investigations." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=86818.

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Background: Effective interventions to prevent obesity in youth are needed in order to alleviate the public health burden associated with elevated blood pressure (BP). However, interventions designed to prevent obesity through increased physical activity levels have had limited success.<br>Objectives: This thesis has four objectives: 1) to assess the impact of changes in adiposity indicators on increases in systolic blood pressure (SBP) during adolescence; 2) to examine the longitudinal association between declines in physical activity and SBP in youth; 3) to assess whether weight status misp

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Eubanks, Bryan Wayne. "STATUS AND DISTRIBUTION OF THE STATE-THREATENED MARSH RICE RAT (ORYZOMYS PALUSTRIS) IN ILLINOIS." OpenSIUC, 2010. https://opensiuc.lib.siu.edu/theses/168.

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The marsh rice rat (Oryzomys palustris) is a semi-aquatic rodent classified as state-threatened in Illinois due to historical wetland loss coupled with being on the northern periphery of its range. The most recent survey for this species in Illinois occurred in 1988, and this study reassessed its status and distribution. From 2007 to 2009, I used live traps to sample for rice rats at previously occupied and random wetland-dominated sites in 5 southern Illinois watersheds. I captured 132 individual rice rats 192 times in 13,248 trap nights. Capture success was 15.10 captures/1,000 trap nigh

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Passos, Leonidas Paixao. "Growth and water status responses of mung bean (Vigna mungo L.) and other dicot species to osmotic stress." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184668.

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Intact dark- and light-grown mung bean (Vigna mungo L.), black bean (Phaseolus vulgaris L.), pea (Pisum sativum L.) cowpea (Vigna unguicul a ta (L.) Wa lp.) and squash (Cucurbita pepo L.) seedlings on hydroponic medium were osmotically stressed by exposing their roots to PEG 8000 of various concentrations (-0.2 to -0.6 MPa) to determine stress effects on growth and tissue water status. Growth of dark-grown mung bean hypocotyls ceases within 40 sec upon exposure to any level of stress, and resumes within 10 to 45 min. Growth of all other seedlings were measured usually after 3 to 24 h stress, a

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Silva, Samara Arcanjo e. "Aluminum concentration, nutritional status and metabolite profile in native Cerrado species with different resistance strategies to the metal." Universidade Federal de Viçosa, 2017. http://www.locus.ufv.br/handle/123456789/21133.

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Submitted by Marco Antônio de Ramos Chagas (mchagas@ufv.br) on 2018-08-14T13:06:53Z No. of bitstreams: 1 texto completo.pdf: 9222690 bytes, checksum: 9325d23376d6ac941fa6283cdcc723ed (MD5)<br>Made available in DSpace on 2018-08-14T13:06:53Z (GMT). No. of bitstreams: 1 texto completo.pdf: 9222690 bytes, checksum: 9325d23376d6ac941fa6283cdcc723ed (MD5) Previous issue date: 2017-02-22<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>O alumínio (Al) é o elemento metálico mais abundante da crosta terrestre. Sua toxidez depende não somente da concentração total de Al no solo,

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Gerber, Leah R. "Risk analysis and use of stochastic population models for determining Endangered Species Act status of North Pacific marine mammals /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/5457.

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Everard, David Alexander. "The conservation status of some unique plant communities in the Eastern Cape." Thesis, Rhodes University, 1986. http://hdl.handle.net/10962/d1007497.

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Abstract:

In response to a growing concern over the rising rates of extinction of the world's plants and of habitat destruction, studies of Southern African threatened plants were initiated in the 1970's. These studies, which have largely concentrated on Western Cape flora, led to the publication of "Threatened Plants of Southern Africa" by Hall et al., 1980, which attempted to list as many threatened or possibly threatened species as possible. It was however marred by a lack of recent herbarium records and detailed studies from many parts of the region, the Eastern Cape being one of these. In order to

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Kudom, Andreas. "Insecticide resistance status of Culex species in urban areas in Ghana and efficacy of long lasting nets against them." Diss., Ludwig-Maximilians-Universität München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:19-180684.

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Abstract:

Background Current strategic plans for malaria control in Ghana include the attainment of 80% of the general population sleeping under insecticide treated materials (ITM) by 2015. This coverage may not be attained if there is non-compliance in the use of bed nets. Failure of ITM to protect users from nuisance mosquitoes, particularly Culex mosquitoes has been cited as one of the major threats to the sustained use of ITM. A nationwide survey was therefore carried out to determine insecticide resistance status of Culex species and efficacy of ITM against them. Methods and materials Mosquito

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