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Rozprawy doktorskie na temat „Rare plants”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Scobie, Andrew Rutherford. "Understanding the causes of reproductive failure in two rare Scottish plants, Linnaea borealis L. and Spiranthes romanzoffiana Cham. and the implications for future conservation management." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources. Restricted: no access until Dec. 21, 2011, 2009. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=59437.

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Smetanyuk, О. І. "Rare medicinal plants of Chernivtsi region." Thesis, БДМУ, 2017. http://dspace.bsmu.edu.ua:8080/xmlui/handle/123456789/17334.

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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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Hughes, Lee E. "Two Rare Plants of the Arizona Strip." University of Arizona (Tucson, AZ), 1997. http://hdl.handle.net/10150/554247.

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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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6

Horsman, Frank. "Botanising in Linnaean Britain : a study of Upper Teesdale in northern England." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/983/.

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The Swede, Carl Linnaeus (1707-1778), introduced an artificial " Sexual System " of plant classification in 1735, and a binomial system of nomenclature in 1753. They made plant identification much easier. The Linnaean period in Britain lasted from 1760 until [1810-]1830. It is demonstrated that it was during this period that it was first recognised that an unusually high number of rare plants grow in Upper Teesdale. Most of the rare plants of the then very remote Upper Teesdale were discovered shortly after 1783 by William Oliver (1760-1816), alone. He was a surgeon and part of a medical dynas

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Binney, Elizabeth P. "Comparative analysis of community and population levels of organization in the rare grass, Achnatherum hendersonii." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ27107.pdf.

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Nock, Erin Elizabeth. "A simple GIS approach to predicting rare plant habitat north central Rocky Mountains, United States Forest Service, Region One /." CONNECT TO THIS TITLE ONLINE, 2008. http://etd.lib.umt.edu/theses/available/etd-06102008-173011/.

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Wheeler, Belinda Ruth. "Aspects of the ecology and conservation of the rare plant species Phyteuma spicatum L (Campanulaceae) in the British Isles." Thesis, University of Sussex, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363382.

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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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Dalton, Naomi Jane. "Pollinators, plants and people : a transdisciplinary study of rare species conservation." Thesis, University of Bristol, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.688353.

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Translocation is widely used to counter the fragmentation and decline of populations of species at risk, in order to enhance their survival prospects. Additionally, translocation is used in ecological restoration to introduce taxa conferring strong positive influence, with the potential to recreate communities and reinstate functional roles. Conservation of species by translocation is considered high risk and high cost; therefore ecologists need to understand how success can be maximised. In this thesis, I test the community level impacts of a rare plant and evaluate the effectiveness of singl

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12

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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13

Griffiths, Megan Elizabeth. "Salt spray effects on rare New England coastal sandplain heathland plant communities /." Thesis, Connect to Dissertations & Theses @ Tufts University, 2003.

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Thesis (Ph.D.)--Tufts University, 2003.<br>Adviser: Colin M. Orians. Submitted to the Dept. of Biology. Includes bibliographical references (leaves 181-200). Access restricted to members of the Tufts University community. Also available via the World Wide Web;

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Last, Mariana P. "Intraspecific Phylogeography of Cycladenia humilis (Apocynaceae)." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/2287.

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Cycladenia humilis (Apocynaceae) is a rare perennial herb native to western North America and has a fragmented distribution in California, Utah, and Arizona. Populations in Utah and Arizona are federally listed as threatened, while there is no conservation status applied to California populations. Using genetic (three chloroplast and two nuclear DNA loci) and morphological characters, intraspecific variation between populations of C. humilis and current taxonomic conventions were assessed. Nested Clade Phylogeographic Analysis and Bayesian phylogenies were used to assess patterns within C. hum

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15

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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Bonner, Jerri LeAnne. "The influence of beaver impoundments on vegetative composition, and modeling habitat suitability as a tool for wildlife management and conservation." Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4396.

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Thesis (M.S.)--West Virginia University, 2005.<br>Title from document title page. Document formatted into pages; contains ix, 119 p. : ill. (some col.), maps (some col.). Includes abstract. Includes bibliographical references.

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17

Ofisi, Mbulelo. "In vitro propagation studies of rare Argyroderma species strictly endemic to the Knersvlakte region of South Africa." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2714.

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Thesis (MTech (Horticulture)--Cape Peninsula University of Technology, 2017.<br>A study was conducted to investigate the effects of various media composition and wounding treating on the in vitro propagation of Argyroderma subalbum and A. testiculare explants derived from mature plants, antioxidants and plant growth regulators (PGR) concentrations. One experiment consisted of 3 medium types including Murashige and Skoog (MS) medium strength, vitamin supplement. Fifteen replicates were used for each treatment. The shoots were then sub-cultured to ten replicate regenerated medium consisting of v

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18

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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19

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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Gruner, Ingrid Gerda. "Comparative Ecology and Conservation of Rare Native Broom, Carmichaelia (Fabaceae), South Island, New Zealand." Thesis, University of Canterbury. School of Forestry, 2003. http://hdl.handle.net/10092/4152.

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Using a comparative approach, the presented study explores the ecology of ten species of native New Zealand broom, Carmichaelia, and their vulnerability to competition and herbivory, with the aim of gaining a better understanding of the significance of introduced species as a threat to rare indigenous plants in New Zealand. In particular, the study focuses on the relationship between characteristics of the Carmichaelia species and their vulnerability, as well as on other factors influencing the significance of introduced species as a threat. To gain a better understanding of the ecology of the

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Blanchard, Jennifer L. "Environmental analysis of the habitat (biotic and abiotic factors) associated with Broadleaf Barbara's Buttons (Marshallia trinervia)." ScholarWorks@UNO, 2009. http://scholarworks.uno.edu/td/1010.

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In June 2009 I conducted a study of the habitat associated with Broadleaf Barbara's Buttons (Marshallia trinervia) along Bird's Creek in Vernon Parish, LA. Twenty two plots were sampled for all vascular plants. Of these, 17 samples were from the area where M. trinervia was present and 5 samples were from the area where M. trinervia was absent. From each sampling plot a soil sample was collected and analyzed. There were significant differences in the species richness of all plant groups (p=0.0075), herbaceous plants (p=0.056), and woody vines (p=0.083) between the two locations. The soil

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22

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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23

MARIA, SHEILA P. "Estudo das caracteristicas de distribuicao de elementos terras raras em Solanum Lycocarpum em diferentes ambientes tropicais do Brasil por ativacao neutronica." reponame:Repositório Institucional do IPEN, 2001. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10843.

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CARVALHO, MARCOS R. de. "Metodologia para determinacao da eficiencia de um monitor de gases emissores de particulas beta." reponame:Repositório Institucional do IPEN, 1995. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10662.

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Lang, Marion [Verfasser], Harald [Akademischer Betreuer] Albrecht, Hanno [Gutachter] Schäfer, Christoph [Gutachter] Leuschner, and Harald [Gutachter] Albrecht. "Reintroduction of rare arable plants on agricultural fields / Marion Lang ; Gutachter: Hanno Schäfer, Christoph Leuschner, Harald Albrecht ; Betreuer: Harald Albrecht." München : Universitätsbibliothek der TU München, 2021. http://d-nb.info/1237815894/34.

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Foster, Kathleen. "Design of an inlet line monitor system for the state of Illinois gaseous effluent monitoring system." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/17323.

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Gray, Jennifer L. "HABITAT CHARACTERIZATION AND INVENTORY OF COLLINSONIA VERTICILLATA IN SHAWNEE STATE FOREST AND STATE PARK, SCIOTO COUNTY, OHIO." Ohio University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1149184142.

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ZINI, JOSIANE. "Usos das cromatografias de extracao e de troca ionica na separacao de torio e terras raras de residuos industriais gerados na unidade de purificacao de torio do IPEN. Aplicacao das terras raras como catalisadores na geracao de hidrogenio." reponame:Repositório Institucional do IPEN, 2010. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9532.

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Weber, Robert Joseph. "An experimental study of fractionation of the rare earth elements in poplar plants (Populus eugenei) grown in a calcium-bearing smectite soil." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/935.

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Staniulytė, Erika. "Antropogeninio poveikio įtaka Vidzgirio botaninio draustinio retiems augalams." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2007. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2007~D_20070816_153338-83545.

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Magistro baigiamąjį darbą sudaro 57 puslapiai. Jame yra 8 lentelės, 31 paveikslėliai, 44 literatūros šaltiniai ir 13 priedų. Magistro darbe tiriama antropogeninio poveikio įtaka Vidzgirio botaninio draustinio retiems augalams. Darbo objektas- reti augalai augantys Vidzgirio botaninio draustinio teritorijoje. Darbo tikslas- įvertinti retų augalų dinamiką per pastaruosius metus ir ieškoti priemonių jų išlikimui. Darbo metodai- retų augalų gausumui nustatyti naudojomės Botanikos instituto parengta monitoringo metodika (Parengta Zigmanto Gudžinsko 2001 m. Botanikos institutas, Floros ir geob

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Kartavičiūtė, Gintarė. "Vištytgirio botaninio- zoologinio draustinio Raudonosios knygos būklės tyrimai." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140616_104844-90142.

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Įvertinti Raudonosios knygos augalų paplitimą, būklę, bei kaitą ir pasiūlyti priemones jų būklei ir paplitimui pagerinti.<br>To assess the distribution of plants of red list, their condition and changes in Vištytgiris botanical-zoological rezerve; and identify measures to improve their condition and spread.

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Clark, Sarah Lynn. "Reproductive biology and impacts of energy development on Physaria congesta and Physaria obcordata (Brassicaceae), two rare and threatened plants in the Piceance Basin, Colorado." DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/1502.

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The Piceance Basin in western Colorado has undergone a drastic increase in oil and gas development over the last two decades. This increase has escalated concerns about the effects of development on the Basin’s flora and fauna, especially the rare plant community. Potential impacts from oil and gas development on rare plants may be found through decrease in plant habitat or by a decrease in plant reproductive success through changes to important pollinator communities. Here, we observed the pollinator community on two rare mustard plants, Physaria congesta and Physaria obcordata (Brassicaceae)

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Moreira, Carolina Mathias. "Avaliação de métodos fitossociológicos através de simulações de amostragens numa parcela permanente de cerradão, na Estação Ecológica de Assis, SP." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-05062007-134450/.

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Existem vários métodos empregados em estudos fitossociológicos e muitos trabalhos já se propuseram a avaliar o desempenho desses métodos. O primeiro e mais utilizado é o método de parcelas, que sempre é referido nos trabalhos como o melhor e por isso definido como base para comparação com os demais. Por esse motivo, nunca foi avaliado isoladamente. Com o presente trabalho tem-se a oportunidade de avaliar o próprio método de parcelas, comparando seus resultados com os valores paramétricos, uma vez que foi feito um censo da área amostrada e a população estatística é conhecida sem erro amostral.

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34

Hervé, Maxime. "Écologie chimique de l'interaction colza - méligèthe : vers de nouvelles stratégies de contrôle des insectes ravageurs ?" Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S070/document.

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Les plantes possèdent de multiples systèmes de défense contre les insectes phytophages. Dans un contexte agronomique, manipuler ces défenses au moyen de la sélection pourrait contribuer à réduire les dommages causés par les insectes ravageurs en augmentant la résistance naturelle des plantes. Cette stratégie se heurte cependant à des contraintes très fortes lorsqu'il s'agit de l'appliquer aux insectes. Après avoir détaillé ces contraintes, nous proposons une démarche alternative aux méthodes classiques. Celle-ci vise à identifier des traits-clés de la plante qui modulent son interaction avec l

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35

Derkintienė, Loreta. "Neries regioninio parko vabzdžių, įtrauktų į Raudonąją knygą, analizė." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090615_114805-46105.

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Magistro darbe tiriami Neries regioninio parko vabzdžiai , įtraukti į Raudonąją knygą. Darbo objektas- niūriaspalvis auksavabalis (Osmoderma eremita Sc.) , gencijoninis melsvys (Makulinea alcon D.& S.), Darbo tikslas- ištirti kai kurių vabzdžių , įtrauktų į Raudonąją knygą, paplitimą ir gausumą Neries regioniniame parke. Darbo metodai - duomenys buvo renkami naudojantis P.Ivinskio ir J.Rimšaitės bestuburių monitoringo metodika . Darbo rezultatai. Atlikus tyrimus ir įvertinus nustatyta , kad niūriaspalvis auksavabalis (Osmoderma eremita) labiau mėgsta senus , drevėtus , gerai apšviestus medžius

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Bothamy, Nina. "Fractionnement anthropique et naturel des isotopes stables du néodyme (Nd) dans l'environnement." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0295.

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Avec une utilisation mondiale croissante pour des applications variées (nouvelles technologies, énergies vertes, etc.), les terres rares (REEs pour ‘rare earth elements’) sont devenues des polluants émergents. Ces pollutions peuvent/pourront être d’origine industrielle (ex. rejets dans l’environnement en sortie d’usine), minière, ou causées par le stockage inapproprié de produits industriels (ex. aimants à base de néodyme (Nd) fragiles à la corrosion). Dans ce contexte, ce projet de thèse a cherché à développer un nouvel outil : l’étude du fractionnement dépendant de la masse des isotopes du N

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Louis, Pauline. "Origine, comportement et devenir des Terres Rares dans les installations de traitements des eaux résiduaires urbaines et les milieux récepteurs associés." Electronic Thesis or Diss., Université de Lorraine, 2021. https://docnum.univ-lorraine.fr/ulprive/DDOC_T_2021_0021_LOUIS.pdf.

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Les Terres Rares (REE) sont naturellement présentes dans les eaux du fait de l’érosion des roches. Elles sont également employées dans des activités anthropiques (nouvelles technologies, énergies, agriculture et médecine). Ces utilisations en constante augmentation ont fini par perturber le cycle géochimique et biologique des REE et ont mené à l’enrichissement (anomalie positive) de certaines REE dans l’hydrosphère (La, Ce, Sm et Gd). Pour le Gdanth, la pollution provient des stations de traitements des eaux usées conventionnelles (STEU) qui ne sont pas en mesure d'éliminer la forme complexe o

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Fiebelkorn, Wrucke Danielle. "Genetic Analysis of Frost Tolerance in Rapeseed/Canola (Brassica Napus L.)." Diss., North Dakota State University, 2017. https://hdl.handle.net/10365/28362.

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Frost can be detrimental to canola (Brassica napus L.) production. Depending on the severity, the entire field can be killed. Having frost tolerance in canola would benefit growers by allowing them to plant early, utilize early season moisture, and avoid high heat during flowering. However, frost tolerance in canola has not been well studied. A protocol was developed that determined 14 day old seedlings should be acclimated at 4?C for 7 days before being exposed to overnight frost (-4?C) in a small freezing chamber. However, when a larger chamber was used for freezing, the protocol was optimiz

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39

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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Ye, Zhengqian. "Effect of low temperature on boron nutrition of oilseed rape and sunflower." Thesis, Ye, Zhengqian (2004) Effect of low temperature on boron nutrition of oilseed rape and sunflower. PhD thesis, Murdoch University, 2004. https://researchrepository.murdoch.edu.au/id/eprint/418/.

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Several reports appear in the literature linking low temperature damage in plants with boron (B) deficiency and alleviation of low temperature injury with B application has been reported in some crops and trees. These results imply that low temperature might increase plant B requirements, beside the reduction of B uptake by plant roots, or that low B tissues might be more sensitive to cold temperature damage than B adequate tissues. In controlled experiments, it has been shown that low root zone temperature (RZT) induces B deficiency in cassava, a tropical root crop. Apart from this, there are

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Ye, Zhengqian. "Effect of low temperature on boron nutrition of oilseed rape and sunflower." Murdoch University, 2004. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20060510.154332.

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Several reports appear in the literature linking low temperature damage in plants with boron (B) deficiency and alleviation of low temperature injury with B application has been reported in some crops and trees. These results imply that low temperature might increase plant B requirements, beside the reduction of B uptake by plant roots, or that low B tissues might be more sensitive to cold temperature damage than B adequate tissues. In controlled experiments, it has been shown that low root zone temperature (RZT) induces B deficiency in cassava, a tropical root crop. Apart from this, there are

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Vilkinytė, Dovilė. "Saugomosios retosios augalu rusys Balkasodzio botaniniame draustinyje." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090615_114653-24626.

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Magisto darbe tiriama Balkasodžio botaninio draustinio saugomų ir retų augalų būklė ir gamtosauginė svarba. Magistro baigiamąjį darbą sudaro 69 puslapiai. Jame yra lentelės, paveikslėliai, literatūros šaltiniai ir priedai. Darbo objektas – Vėjalandės šilagėlės (Pulsatilla patens), plikažiedžio linlapio (Thesium ebracteatum), smiltyninio gvazdiko (Dianthus arenarius) ir kitų rūšių radimvietės Balkasodžio botaniniame draustinyje. Darbo tikslas – Nustatyti į ES buveinių direktyvos II priedą įrašytų rūšių: vėjalandės šilagėlės (Pulsatilla patens), plikažiedžio linlapio (Thesium ebracteatum) ,

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Stangoulis, James Constantine Roy. "Genotypic variation in oilseed rape to low boron nutrition and the mechanism of boron efficiency." Title page, contents and summary only, 1998. http://web4.library.adelaide.edu.au/theses/09PH/09phs7856.pdf.

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Bibliography: leaves 132-159. Boron efficiency in oilseed rape (Brassica napua L. and B. juncea L.) was investigated in a wide range of genotypes. Using a solution culture screening of 10 day old seedlings, root length best described shoot growth response, and was used to characterise a total of 65 genotypes. Varieties and breeders lines tolerant of B-deficient growing conditions were identified, and the screening process validated through field trials. B responses in plants sampled at the 'green bud' stage indicated that vegetative growth is important in B efficiency. Studies were conducted

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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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Chour, Zeinab. "Valorisation de terres rares à partir de plantes hyperaccumulatrices." Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0142/document.

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En raison du risque d’un approvisionnement insuffisant en ressources primaires des terres rares et des impacts environnementaux générés par les zones minières, le concept de l’agromine paraît être une solution très prometteuse. Il permet d’extraire des métaux lourds à partir de sols pollués ou de friches industrielles, par une méthode respectueuse de l’environnement, grâce à la culture de plantes hyperaccumulatrices. Une fois la culture réalisée, des procédés hydrométallurgiques sont développés afin d’extraire des plantes les métaux ayant une valeur économique importante. Le présent travail vi

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Mulyati. "Zinc requirements of transplanted oilseed rape." Thesis, Mulyati, (2004) Zinc requirements of transplanted oilseed rape. PhD thesis, Murdoch University, 2004. https://researchrepository.murdoch.edu.au/id/eprint/213/.

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Transplanting is a common practice for many horticultural crops and some field crops. Recently, transplanted oilseed rape (Brassica napus L.) crops have been reported to be sensitive to zinc (Zn) deficiency. However, Zn nutrition in transplanted field crops has not been investigated in detail. The objectives of this present research were to investigate whether transplanting increases external Zn requirements of transplanted oilseed rape, and the mechanisms of root function, growth and Zn uptake after transplanting including rhizosphere modification capacity by plant roots. The second objective

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Mulyati. "Zinc requirements of transplanted oilseed rape." Murdoch University, 2004. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20060109.135933.

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Transplanting is a common practice for many horticultural crops and some field crops. Recently, transplanted oilseed rape (Brassica napus L.) crops have been reported to be sensitive to zinc (Zn) deficiency. However, Zn nutrition in transplanted field crops has not been investigated in detail. The objectives of this present research were to investigate whether transplanting increases external Zn requirements of transplanted oilseed rape, and the mechanisms of root function, growth and Zn uptake after transplanting including rhizosphere modification capacity by plant roots. The second objective

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Chour, Zeinab. "Valorisation de terres rares à partir de plantes hyperaccumulatrices." Electronic Thesis or Diss., Université de Lorraine, 2018. http://www.theses.fr/2018LORR0142.

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En raison du risque d’un approvisionnement insuffisant en ressources primaires des terres rares et des impacts environnementaux générés par les zones minières, le concept de l’agromine paraît être une solution très prometteuse. Il permet d’extraire des métaux lourds à partir de sols pollués ou de friches industrielles, par une méthode respectueuse de l’environnement, grâce à la culture de plantes hyperaccumulatrices. Une fois la culture réalisée, des procédés hydrométallurgiques sont développés afin d’extraire des plantes les métaux ayant une valeur économique importante. Le présent travail vi

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Fearon, Joclyn Joe. "Population assessments of priority plant species used by local communities in and around three Wild Coast reserves, Eastern Cape, South Africa." Thesis, Rhodes University, 2011. http://hdl.handle.net/10962/d1007059.

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The project was initiated by Eastern Cape Parks (ECP) as a request for the construction of inventories of priority species and their population levels inside three nature reserves on the Eastern Cape Wild Coast, South Africa, and to develop a strategic management plan to manage these natural resources in each reserve. Thirty key species were identified by local communities in and around Dwesa-Cwebe, Silaka and Mkambati Nature Reserves through community workshops. For forested areas belt transects of 100 m x 6 m where used. The basal circumference of key tree species within the belt transect wa

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Geißler, Katja. "Lebensstrategien seltener Stromtalpflanzen : autökologische Untersuchung von Cnidium dubium, Gratiola officinalis und Juncus atratus unter besonderer Berücksichtigung ihrer Stressresistenz." Phd thesis, Universität Potsdam, 2008. http://opus.kobv.de/ubp/volltexte/2008/1746/.

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Die vorliegende Dissertation behandelt die Ökologie von Cnidium dubium (Schkuhr) Thell. (Sumpf-Brenndolde), Gratiola officinalis L. (Gottes-Gnadenkraut) und Juncus atratus Krocker (Schwarze Binse), drei gefährdeten Arten, die als sogenannte Stromtalpflanzen in Mitteleuropa in ihrem Vorkommen eng an die Flussauen gebunden sind. Die Arbeit basiert auf verschiedenen Simulationsexperimenten und Feldstudien in der Unteren Havelniederung, einem „Feuchtgebiet von internationaler Bedeutung“. Sie behandelt Themenkomplexe wie das Samenbankverhalten, die Samenkeimung, die Stickstofflimitierung, die Konk

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