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Tesis sobre el tema "Endangered plants"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 25 de julio de 2025

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1

Robertson, Emma. "TRANSITIONS: Biophilia, Beauty and Endangered Plants." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/17875.

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While the science continues to underline the increasing risks posed by climate change, rallying the public to the cause has proved increasingly difficult. A major challenge is finding alternatives to the despair, hopelessness and consequent sense of disempowerment that confronting the realities of climate change can provoke. It is also the case that particular silent aspects of the impact of climate change – for example on the future viability of certain plant species – receive less public and political attention than others, such as catastrophic weather events. Artists have been active in exp
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2

Swarts, Nigel. "Integrated conservation of the rare and endangered terrestrial orchid Caladenia huegelii H.G. Reichb /." Connect to this title, 2007. http://theses.library.uwa.edu.au/adt-WU2008.0044.

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3

Filipski, Jules. "Reproductive biology of the endangered plant, Phlox hirsuta (E.E. Nelson)." View full-text version online, 2005. http://soda.sou.edu/awdata/060221b1.pdf.

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Thesis (M.S.) --Southern Oregon University, 2005.<br>"A thesis submitted to the Department of Biology and the Graduate School of Southern Oregon University in partial fulfillment of the requirements for the degree of Master of Science in Science." Includes bibliographical references (p. 69-75) Also available via Internet as PDF file through Southern Oregon Digital Archives: http://soda.sou.edu. Search Bioregion Collection.
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4

Kaye, Thomas N. "Population viability analysis of endangered plant species an evaluation of stochastic methods and an application to a rare prairie plant /." Connect to this title online, 2001. http://fresc.usgs.gov/products/thesis/kaye/thesis.html.

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5

Swarts, Nigel. "Integrated conservation of the rare and endangered terrestrial orchid Caladenia huegelii H.G. Reichb." University of Western Australia. School of Earth and Geographical Sciences, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0044.

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The Orchidaceae is characterized by a remarkably diverse range of life forms and some of the most highly specialized interactions with soil fungi and insect pollinators found in the flowering plants. Many species are rare or threatened with extinction either directly through loss of habitat or over-collection or, indirectly through debilitation or loss of mycorrhizal association or pollinator capacity. Australian temperate terrestrial orchids represent one of the most threatened groups in the Australian flora with many taxa clinging to existence in urban and rural bushland remnants, road verge
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6

Xego, Sibusiso. "Hydroponic propagation of Siphonochilus aethiopicus: an endangered medicinal plant." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2421.

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Thesis (MTech (Horticultural Sciences))--Cape Peninsula University of Technology, 2017.<br>The increasing demand for medicinal plants has led into serious over-harvesting of wild populations and presents an opportunity for potential profitable cultivation. Production of medicinal plants in controlled environments particularly hydroponic technology provides opportunities for high quality biomass accumulation and optimizes production of secondary metabolites. Water availability and supplies are becoming scarce, thus search for innovative irrigation practices is desirable and vital. The proper ir
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7

Grant, Marissa Catherine Jernegan. "Survival strategies of the endangered Physaria ludoviciana (silvery bladderpod; Brassicaceae) /." View online, 2009. http://repository.eiu.edu/theses/docs/32211131592147.pdf.

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8

Sharma, Jyotsna. "Mycobionts, germination, and conservation genetics of federally threatened Platanthera praeclara (Orchidaceae) /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3060142.

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9

Mosime, Bonolo. "In vitro conservation of selected endangered plant species indigenous to the Cape Floristic Region, South Africa." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2343.

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Thesis (MTech (Horticulture))--Cape Peninsula University of Technology, 2016.<br>This study focused on optimising four types of in-vitro conservation methods, namely: 1), micropropagation, 2) in-vitro slow growth, 3) seed germination and 4) cryopreservation for selected endangered plant species indigenous to the Cape Floristic Region. It is one of the targets set by United Nations millennium development goals, to integrate different conservation measures in order to preserve plant diversity and mitigate losses of genetic diversity. Therefore this study uses Phalaenopsis hybrids as a trial spec
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10

Walker, Charles Henry. "Biological and ecological attributes of some endangered vascular plants of southern Illinois /." Available to subscribers only, 2007. http://proquest.umi.com/pqdweb?did=1324370471&sid=4&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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11

Mlungwana, Asanda. "In-vitro propagation studies of the endangered succulents Drosanthemum Micans and Drosanthemum Hallii (Aizoaceae)." Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2748.

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Thesis (MTech (Horticulture))--Cape Peninsula University of Technology, 2018.<br>Drosanthemum micans and Drosanthemum hallii are endangered succulent shrubs of horticultural and medicinal value. They are restricted to the Succulent Karroo, which is one of the world’s biodiversity hotspots. The species risk extinction from illegal over-harvesting for water-wise gardens, erosion by occasional flush floods from ephemeral rivers, competition from alien invasive species, overgrazing and clearing of land for agriculture and human settlement. Although seeds and cuttings may be used in propagating the
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12

Kunzelman, Jennifer I. "Does ultraviolet radiation induce changes in the photophysiology and photochemistry of Halophila johnsonii Eiseman? /." Electronic version (PDF), 2003. http://dl.uncw.edu/etd/2003/kunzelmanj/jenniferkunzelman.html.

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13

Demirci, Barbaros. "A Geographic Information Systems Tool Development For Geostatistical Analysis Of Endangered Endemic Vascular Plants Of Turkey." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606098/index.pdf.

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Modern information systems strive to provide effective use of resources. Supplied with analysis tools, geographical information systems (GIS) can serve its stakeholders with minimal requirements. In this study, GIS capabilities were employed for Turkish Flora. Data related with the threatened plants that are indigenous to Turkey were gathered from the relevant literature and reshaped into a dataset in which spatial locations were represented in a geographically referenced format. Afterwards, this output was used to investigate the affects of different factors on the distribution patterns of th
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14

Walker, George Floyd. "Analysis of molecular variation in the federally endangered Astragalus jaegerianus (Fabaceae, Papilionoideae): A species with a restricted geographic range." CSUSB ScholarWorks, 2005. https://scholarworks.lib.csusb.edu/etd-project/2743.

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The purpose of this study is to investigate the level and distribution of genetic variation in Astragalus jaegerianus by using molecular markers. The objectives of the study are: to estimate levels of genetic variation within and among populations of Astragalus jaegerianus; to test the hypothesis that levels and patterns of genetic variation in species of restricted ranges and few individuals is low and partitioned at the population level; and to discern whether, or how well, genetic partitioning of Lane Mountain milk vetch correlates with its geographic partitioning in the field.
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15

Burke, Jennifer L., and University of Lethbridge Faculty of Arts and Science. "The evolutionary origins of Erigeron trifidus, a rare plant in Alberta." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2005, 2005. http://hdl.handle.net/10133/244.

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The present study analyzed the evolutionary history of Erigeron trifidus Hook. by addressing two main questions: 1) Is the current hypothesis of the origin of the species by hybridization between E.compositus and E.lanatus supported by molecular data? and 2)Is the species monophyletic? An analysis of uni-and-biparentally inherited molecular markers from three species throughout the range of E.trifidus yielded data that supports the hybridization hypothesis. First, a restriction site analysis of cpDNA revealed 4 haplotypes. In most cases, cpDNA haplotypes were the same as in E.lanatus, suggesti
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16

Glimskär, Anders. "Growth strategies, competition and defoliation in five grassland plants /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5465-4.pdf.

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17

Rivers, Malin C. "Range-wide analysis of the spatial distribution and genetic diversity of Delonix s.l. (Leguminosae) in Madagascar : enhancing herbarium-based conservation assessments." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/2097.

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Despite their ecological and economic importance, the majority of plant species and their conservation status are poorly known. Only 4% of plants have been assessed globally and listed on the IUCN Red List of Threatened Species; and without plant conservation assessments, many plant species will not feature in conservation planning. Herbarium collection information can significantly increase the number of plant conservation assessments. Thus, the aims of this thesis were: (1) to investigate how the quality of herbarium-based conservation assessments can be optimised; (2) to assess the extent t
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18

Gustavsson, Eva. "Grassland plant diversity in relation to historical and current land use /." Uppsala : Dept. of Ecology, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/2007106.pdf.

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19

Bussara, Tirakalyanapan Sittipong Dilokwanich. "The cooperation between government agency and environmental NGOS : a case study on convention on international trade in endangered species of wild fauna nad flora /." Abstract, 2005. http://mulinet3.li.mahidol.ac.th/thesis/2548/cd379/4537409.pdf.

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20

Bates, Thomas Hathaway. "Sclerocactus wrightiae (Cactaceace): An Evaluation of the Impacts Associated with Cattle Grazing and the Use of Remote Sensing to Assess Cactus Detectability." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8986.

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The Wright fishhook cactus (Sclerocactus wrightiae L.D. Benson) is an endangered cactus species endemic to south-central Utah. Since its listing in 1979 by the U.S. Fish and Wildife Service, the potential impacts of soil disturbance by cattle have become a central focus of management policies and monitoring efforts. However, little to no empirical data has been collected to substantiate the hypothesis that soil disturbance by cattle has direct or indirect negative effects on Wright fishhook cactus growth or reproduction. Over the years, the Bureau of Land Mangement (BLM) and Capitol Reef Natio
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21

Swart, Carin. "Life history, population dynamics and conservation status of Oldenburgia grandis (Asteraceae), an endemic of the Eastern Cape of South Africa." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1003799.

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Oldenburgia grandis is a rare, long-lived woody paleoendemic of the Fynbos Biome of South Africa. Confined to quartzite outcrops, it has a small geographic range and narrow habitat specificity. O. grandis responds to its fire-prone environment by resprouting. Elasticity analysis of O. grandis reveals that growth and fecundity were traded off for persistence of adult, mature and sapling stages. Morphological adaptations such as a corky fire-resistant bark and the ability to resprout after fire are traits that O. grandis have evolved to persist in a frequently disturbed environment. Population g
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22

Rudolphi, Jörgen. "Bryophytes, lichens and dead wood in young managed boreal forests /." Uppsala : Dept. of Ecology, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200788.pdf.

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23

Kreivi, M. (Marjut). "Conservation genetics and phylogeography of endangered boreoarctic seashore plant species." Doctoral thesis, University of Oulu, 2009. http://urn.fi/urn:isbn:9789514290190.

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Abstract The amount and distribution of genetic diversity are likely to affect the evolutionary potential of a species. When feasible and cost-effective policies for management and monitoring of endangered populations or species are planned, knowledge of the spatial genetic structure and the type of population dynamics is of great concern. In this thesis the genetic diversity and population structures of two endangered arctic plant species was examined on different geographical scales in Northern Europe. The species were Siberian primrose (Primula nutans) and pendant grass (Arctophila fulva),
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24

Johnson, Connie Nicole. "Stem cutting propagation of the endangered species, Clematis socialis (Kral)." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Fall/Theses/JOHNSON_CONNIE_58.pdf.

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25

Hattenbach, Meryl Jennifer. "Edaphic relations of an endangered plant, Trifolium stoloniferum Muhl. ex A. Eaton." Connect to resource, 1996. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1261052966.

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26

Reiter, Noushka Hedy, and noushka reiter@dse vic gov au. "Borya mirabilis steps in the recovery of a critically endangered Australian native plant." RMIT University. Applied Sciences, 2009. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20090227.160625.

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Borya mirabilis is one of the world's most critically endangered plants. The research in this thesis has illuminated key aspects of: its reproductive biology; interspecies and intraspecies molecular relationships, mycorrhizal status, tissue culture potential and disease threats. Each of these aspects has fundamental management implications for the active management of B. mirabilis. Floral observations of B. mirabilis and related species affirmed the uniqueness of the Boryaceae amongst the Asparagales. B. mirabilis had an unusually high number of floral abnormalities compared with other sp
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27

Symonds, Josephine Elizabeth. "Patterns and ecological consequences of exotic plant invasion in Canada's endangered antelope-brush ecosystem." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/33719.

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Exotic species invasion is a serious threat to ecosystem structure and function throughout the world. In an effort to understand and limit the future effects of invasion, recent research has focused on quantifying and predicting patterns of exotic plant invasion based on abiotic and biotic features, particularly native species diversity, over multiple spatial scales. I investigated native-exotic richness relationships (NERRs) and their scale-sensitivity and predictability within the antelope-brush (Purshia tridentata Pursh (DC)) shrub-steppe grasslands of the South Okanagan Valley, British C
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28

Shiu, Y. B. Ivan, and 蕭猷斌. "Saving the endangered longest beach of Hong Kong: enhancing public awareness on coastal and global climateproblems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38219268.

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29

Marberg, Mikael. "Phippsia concinna in Sweden : Exploring ecological dependencies in a regionally endangered plant species that occurs in alpine snowbeds." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-101244.

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The purpose of this study is to 1: Get an updated population estimate for the regionally endangered alpine specialist plant Phippsia concinna in Sweden and 2: Explore the ecological dependencies that limits the distributions of this species to late melt-out alpine snowbeds on calcareous soils, and 3: Explore if climate change in the southern part of the Scandes mountain range is causing a decline in the population numbers of P. concinna. The majority of the sites in Sweden where P. concinna occurred historically was inventoried in 1992. This study presents the results of a re-inventory of the
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30

Kadir, A. F. M. Manzur. "Ecology of sub-Himalayan herblands in Darjeeling with special emphasis on streptocaulon sylvestre wight an endangered and endemic plant." Thesis, University of North Bengal, 2001. http://hdl.handle.net/123456789/880.

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31

Pickens, Bradley A. "THE CONSEQUENCES OF A MANAGEMENT STRATEGY FOR THE ENDANGERED KARNER BLUE BUTTERFLY." Bowling Green State University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1149173870.

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32

Correa, Cano María Eugenia. "Macroecological patterns of plant species and anthropogenic activities." Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/22975.

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The study of macroecology not only identifies patterns in the distribution and abundance of species at large spatial and temporal scales, it also gives insight into the processes underlying those patterns. The contribution of this work is not limited to helping develop the field of ecology per se, but also provides important insights into the understanding of large scale processes like climate change, the spread of introduced species, pest control and how increasing pressure from anthropogenic activities threatens biodiversity and ecosystem services. During the first decade following its forma
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33

Yayan, Wahyu Candra Kusuma. "Ecological and genetic studies of endangered plant species, Vatica bantamensis and Rafflesia spp., for developing optimal conservation strategies in Indonesia." Kyoto University, 2019. http://hdl.handle.net/2433/244560.

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34

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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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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35

Hudgens, Faith Victoria. "AN ASSESSMENT OF STREAM QUALITY IN RELATION TO POPULATION HEALTH OF PLANTAGO CORDATA." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/theses/2887.

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Understanding the health of rare and at-risk plant species is crucial for the conservation of biodiversity. Rare and at-risk species are often specialists with very specific requirements for growth and reproductive success. Some parameters associated with growth and reproductive success of rare aquatic species may include biotic and abiotic factors such as herbivory, competition, water depth, pH, and other factors associated with habitat quality. In this thesis, the population health of the rare and at-risk aquatic species Plantago cordata in Southern Illinois streams is assessed in relatio
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36

Erguner, Baytok Yasemin. "Population Status, Threats And Conservation Approaches For A Highly Threatened Endemic Plant, Centaurea Tchihatcheffii Fisch. &amp." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12610122/index.pdf.

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Centaurea tchihatcheffii Fisch. &amp<br>Mey. is a critically endangered annual endemic plant found only in Ankara. This study aimed to determine its distributional range, metapopulation status, the effects of agricultural activities, and assess conservation options. Occurrences and population size estimates were carried out by ground surveys. Two adjacent subpopulations were intensively studied during 2004-2008. Plant and seed demographic data were collected in the field and by laboratory tests. Field experiments simulated the effects of agricultural practices. Risks of extinction and possible
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37

Handel, Kevin. "Testing Local Adaptation Of The Federally Endangered Karner Blue Butterfly (Lycaeides Melissa Samuelis) To Its Single Host Plant The Wild Lupine (Lupinus Perennis)." Bowling Green State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1429214530.

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38

Braidwood, David Walter. "Remediation and restoration of ocean exposed cliff-top, in the context of Dounreay (Scotland) nuclear power plant decommissioning." Thesis, University of Aberdeen, 2018. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=237241.

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Restoration ecology continues to become ever more relevant as legislation demands we prevent biodiversity losses. Post-industrial restoration sites pose a number of additional challenges, including balancing ecological need with logistical and financial constraints. In the North of Scotland, one such site is the Dounreay Nuclear Power Plant, now undergoing decommissioning. The intention is to restore cliff-top habitat with native vegetation, blending in with its surroundings and necessitating minimal maintenance. The overall objective of this PhD research was to help develop a plan for the res
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39

Snyder, Melissa. "Ecological and Genetic Variation Among Populations of Boechera caeruleamontana sp. nov. (Brassicaceae) from Blue Mountain and Dinosaur National Monumentin Eastern Utah and Western Colorado." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6344.

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Boechera is a large genus of flowering plants whose taxa are found primarily in North America. Boechera vivariensis (S.L. Welsh) W.A. Weber (the Park rockcress) is restricted to the Uintah Basin on Weber sandstone substrates in the vicinity of Dinosaur National Monument and Blue Mountain. The nomenclature of Park rockcress is significantly impacted by the discovery that the type collections of the taxon represent a rare, apomictic diploid resulting from the hybridization between B. thompsonii and an undescribed sexual diploid (to be called Boechera caeruleamontana sp. nov. Allphin and Windham)
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40

Planchuelo, Gregorio [Verfasser], Ingo [Akademischer Betreuer] Kowarik, Moritz von der [Akademischer Betreuer] Lippe, Ingo [Gutachter] Kowarik, Moritz von der [Gutachter] Lippe, and Jonathan [Gutachter] Jeschke. "Urbanisation impacts on rare and endangered plant species / Gregorio Planchuelo ; Gutachter: Ingo Kowarik, Moritz von der Lippe, Jonathan Jeschke ; Ingo Kowarik, Moritz von der Lippe." Berlin : Technische Universität Berlin, 2019. http://d-nb.info/1196200130/34.

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41

Windhager, Steven. "An assessment of the use of seeding, mowing, and burning in the restoration of an oldfield to tallgrass prairie in Lewisville, Texas." Thesis, Connect to this title online, 1999. http://www.library.unt.edu/theses/open/19992/windhager%5Fsteven/index.htm.

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42

Jonsell, Mats. "Insects on wood-decaying polypores : conservation aspects /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5627-4.pdf.

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43

Pereira, Ismael Martins. "Ecologia, conservação e aspectos taxonômicos do gênero neotropical Davilla Vand. (Dilleniaceae)." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/59/59139/tde-30072014-110731/.

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Neste trabalho realizou-se o estudo de distribuição, riqueza e conservação do gênero Davilla Vand. (Dilleniaceae) no Neotrópico. Para tal utilizou-se a modelagem de distribuição de espécies com o algoritmo Maxent. Este produz distribuição das espécies no espaço geográfico a partir de dados ambiental e de ocorrência. Foram estudadas as espécies de acordo com o bioma de ocorrência: Mata Atlântica; Cerrado; e Amazônia. Este grupo está representado no Neotrópico por 25 espécies. Para o Cerrado incluiu-se além das espécies do gênero Davilla as demais espécies da família Dilleniaceae. Os resultados
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44

Bruce, Jessica. "Phylogeography and population structure of the putative relict Reedia spathacea F.Muell. (Cyperaceae)." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2021. https://ro.ecu.edu.au/theses/2441.

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Lineages which have persisted from Gondwana and remain restricted to mesic habitats with fragmented distributions are often considered relicts. Relictual taxa belong to formerly more common groups that have become isolated phylogenetically by extinction and/or geographically by changes in climate and habitat availability. The south-west region of Australia is a biodiversity hotspot containing flora that are Gondwanan in origin. Within this region are restricted remnants of mesic habitat that host taxa not found elsewhere, including the endemic sedge Reedia spathacea F.Muell. (Cyperaceae). The
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45

Davila, Yvonne Caroline. "Pollination ecology of Trachymene incisa (Apiaceae): Understanding generalised plant-pollinator systems." Thesis, The University of Sydney, 2006. http://hdl.handle.net/2123/1896.

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A renewed focus on generalised pollinator systems has inspired a conceptual framework which highlights that spatial and temporal interactions among plants and their assemblage of pollinators can vary across the individual, population, regional and species levels. Pollination is clearly a dynamic interaction, varying in the number and interdependence of participants and the strength of the outcome of the interaction. Therefore, the role of variation in pollination is fundamental for understanding ecological dynamics of plant populations and is a major factor in the evolution and maintenance of
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46

Davila, Yvonne Caroline. "Pollination ecology of Trachymene incisa (Apiaceae): Understanding generalised plant-pollinator systems." University of Sydney, 2006. http://hdl.handle.net/2123/1896.

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Doctor of Philosophy (PhD)<br>A renewed focus on generalised pollinator systems has inspired a conceptual framework which highlights that spatial and temporal interactions among plants and their assemblage of pollinators can vary across the individual, population, regional and species levels. Pollination is clearly a dynamic interaction, varying in the number and interdependence of participants and the strength of the outcome of the interaction. Therefore, the role of variation in pollination is fundamental for understanding ecological dynamics of plant populations and is a major factor in the
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47

Gilfedder, Louise. "Aspects of the conservation biology of Helipterum albicans (Hook.) P.G. Wilson." Thesis, 1991. https://eprints.utas.edu.au/19594/1/whole_GilfedderLouise1993_thesis.pdf.

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The straw daisy Helipterum albicans ssp. albicans var. incanum (Hook.) P.G.Wilson forme incanum is endangered, and is in serious risk of disappearing from the wild within one or two decades if present land use and other causal factors continue to operate. H. albicans may have been a naturally rare species, but its current endangered status is the result of anthropogenic processes. It is a species that occurs in temperate grassy ecosystems, the vegetation type most altered for grazing and agriculture. H. albicans was once more widespread in its distribution, but currently it is restrict
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Madubanya, Lebogang Angelo. "In vitro conservation of endangered Dierama species." Thesis, 2004. http://hdl.handle.net/10413/10089.

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Hartzell, James Francis. "Response of the endangered medicinal plant : Siphonochilus aethiopicus (Schweif) B.L. Burt. to agronomic practices." Thesis, 2011. http://hdl.handle.net/10413/10037.

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This study examines field cropping constraints for domestication of an endangered, wild medicinal plant, Siphonochilus aethiopicus, (Schweif.) B.L. Burt. Extensive literature review and careful observations of plant growth behavior during two years of crop trials overturned several long-held but erroneous claims that have consistently appeared in the scholarly literature, and revealed previously undocumented plant growth characteristics. S. aethiopicus (Schweif.) B.L. Burt. is a rhizomatous corm, not a rhizome. Field growth observations demonstrated clearly that the false stem and leaves grow
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Chang, Li-Wan, and 張勵婉. "Vegetation and Rare, Endangered Plants in the Wulai Area." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/13374488359194371985.

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