Dissertations / Theses on the topic 'Plant communities'
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Laxton, Emma. "Relationship between leaf traits, insect communities and resource availability." Thesis, Electronic version, 2005. http://hdl.handle.net/1959.14/483.
Full textBibliography: p. 178-203.
Introduction -- Study sites -- Leaf characteristics and resource availability -- Insect herbivory and resource availability -- Insect communities and resource availability -- Influence of resource availability on recovery from herbivory -- Conclusions.
This project used the resource availability hypothesis (Coley et al., 1985) as a framework for investigating the relationship between resource availability (as defined by soil nutrients), leaf traits, insect herbivore damage and insect community structure. According to the hypothesis, plants from low resource environments should be better-defended, have longer leaf lifespans and slower growth rates than plants from higher resource environments. Higher resource plant species are expected to suffer higher levels of herbivory and recover faster from herbivory than low resource plant species (Coley et al. 1985). A corollary to this hypothesis is that plants from higher resource sites should support greater densities of insect herbivores than low resource species. Comparisons between high and low resource sites were made in terms of: (i) leaf traits of mature and immature leaves; (ii) phenology of leaf maturation; (iii) herbivore damage in the field and laboratory; (iv) diversity and abundance of herbivorous insect fauna; and (v) ability to recover from herbivory.
Mode of access: World Wide Web.
243 p. ill., maps
Boughton, Elizabeth Hermanson. "Understanding plant community composition in agricultural wetlands context dependent effects and plant interactions /." Orlando, Fla. : University of Central Florida, 2009. http://purl.fcla.edu/fcla/etd/CFE0002678.
Full textLeung, Pui-chi. "Exotic plant invasion of upland plant communities in Hong Kong, China." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B36632442.
Full textBerglund, Linda. "Disturbance, nutrient availability and plant growth in phenol-rich plant communities /." Umeå : Dept. of Forest Vegetation Ecology, Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/s327.pdf.
Full textLeung, Pui-chi, and 梁佩芝. "Exotic plant invasion of upland plant communities in Hong Kong, China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B36632442.
Full textIglesias, Maria Claudia. "Spacial patterns of the genders in Dioecius plant species." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65458.
Full textBush, Catherine Dana. "Native seed mixes for diverse plant communities." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ28920.pdf.
Full textCervantes, Peredo Luis Manuel. "Effects of Hemiptera on successional plant communities." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362367.
Full textAllan, Caroline Elizabeth. "Nitrogen fixation in riverine wetland plant communities." Thesis, University of Glasgow, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297033.
Full textSutton, Julian James. "On the dynamics of annual plant communities." Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235530.
Full textShaw, Rosalind F. "Plant-herbivore interactions in montane willow communities." Thesis, University of Aberdeen, 2006. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU212664.
Full textVonlanthen, Corinne Maria. "Alpine plant communities : ecology and species richness /." [S.l.] : [s.n.], 2005. http://www.zb.unibe.ch/download/eldiss/05vonlanthen_c.pdf.
Full textSiegwarth, Mark. "Zen and the Art of Plant Communities." University of Arizona (Tucson, AZ), 2012. http://hdl.handle.net/10150/556788.
Full textPatrick, L. Brian. "Fertilization and plant litter effects on the plant and epigeal arthropod communities." [Kent, Ohio] : Kent State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=kent1259588844.
Full textTitle from PDF t.p. (viewed April 14, 2010). Advisor: Mark W. Kershner. Keywords: biodiversity; nitrogen; fertilization; plant litter; trophic dynamics; epigeal community. Includes bibliographical references.
Foy, Elizabeth Christina. "Riparian vegetation and forest structure of two unregulated tributaries, compared to the regulated Snake River, Grand Teton NP, WY." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/foy/FoyE1208.pdf.
Full textBinney, 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.
Full textCarlyle, Cameron Norman. "Interacting effects of climate change and disturbance on grassland plants and plant communities." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42269.
Full textRatcliffe, Sophia Emma Thirza. "Competition and coexistence in experimental annual plant communities." Thesis, Imperial College London, 1999. http://hdl.handle.net/10044/1/11515.
Full textGaudet, Connie Lee. "Competition in shoreline plant communities: A comparative approach." Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/6516.
Full textLee, Harold Thomas. "The effects of eutrophication on wetland plant communities." Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/6673.
Full textDeSandoli, Lisa Ann. "Restoration of plant communities to red-burned soils." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44301.
Full textNewton, Erika Lucie. "Plant-herbivore interactions in natural Brassica oleracea communities." Thesis, University of Exeter, 2009. http://hdl.handle.net/10036/72253.
Full textJohnston, Mark A. "Rabbit grazing and the dynamics of plant communities." Thesis, Imperial College London, 1992. http://hdl.handle.net/10044/1/11781.
Full textStonehouse, Amanda L. "The flora and plant communities of Botany Glen." Virtual Press, 2003. http://liblink.bsu.edu/uhtbin/catkey/1266033.
Full textDepartment of Biology
Jeffs, Christopher. "Natural enemies and the diversity of plant communities." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:49c80db9-6590-4e06-b86f-24d225046969.
Full textGauthier, Marie-Eve. "Restoring peatland plant communities on mineral well pads." Master's thesis, Université Laval, 2014. http://hdl.handle.net/20.500.11794/25320.
Full textPeatlands are largely represented in the boreal region of Alberta but little is known about their restoration on well sites. The goal of this study is to compare plant communities and substrates in order to recover peatland vegetation. Two field experiments tested which plant communities (bog, bog-aspen ecotone, willow-sedge fen, shrubby rich fen, treed rich fen) would best regenerate on different substrate (sawdust, clay loam, mix sawdust-clay, peat, surface roughness). We found that peatland communities can establish on mineral soil after propagules transfer using the moss layer transfer technique (MLTT). The choice of plant community, where the propagules are harvested is key to bryophytes establishment. Peat amendment facilitated the plants establishment. The MLTT is a promising approach to restore fen plants on well sites. We recommend a scale-up experiment for a whole well site to test the validity of MLTT within pad removal techniques.
Hansel, James R. "INFLUENCE OF URBANIZATION ON WOODY RIPARIAN PLANT COMMUNITIES." Miami University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=miami1113852536.
Full textTrentanovi, Giovanni. "Vascular plant species diversity in fragmented secondary plant communities: a landscape ecology approach." Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3421745.
Full textL’ecologia del paesaggio studia l’influenza dei pattern spaziali sui flussi di specie. La continua frammentazione ed alterazione delle fitocenosi in paesaggi antropizzati rende necessario comprendere le dinamiche delle comunità vegetali che caratterizzano il paesaggio antropizzato, cercando di evitare il più possibile la perdita di diversità biologica che spesso è conseguenza di tali trasformazioni. La mia tesi è basata su tre articoli di ricerca riguardanti l’analisi della diversità della flora vascolare in fitocenosi secondarie e frammentate. In un lavoro di review invece, è stato analizzato l’effetto della riforestazione spontanea su fitocenosi secondarie a seguito dell’abbandono delle pratiche agricole. Ciascun lavoro è stato caratterizzato da specifici obiettivi, adattati in base alla variabilità del paesaggio e del tipo di fitocenosi secondaria indagata. Ciononostante, l’obiettivo comune di questa tesi è stato quello di esaminare l’influenza delle variabili di paesaggio e gestionali sulla variabilità della flora vascolare, tramite l’utilizzo di metodologie e strumenti propri dell’ecologia del paesaggio. Le analisi sono state effettuate in tre fitocenosi secondarie e frammentate, i.e. pascoli (Paper II), neoformazioni boschive (Paper III) e siepi rurali (Paper IV), inserite all’interno di differenti matrici paesaggistiche. Il terzo caso di studio (Paper III) è stato sviluppato in collaborazione con la Technische Universität di Berlino durante il mio periodo di dottorato all’estero. Le analisi sono state effettuate sia a livello di patch che di paesaggio, considerando quindi congiuntamente i rilievi floristici e le variabili gestionali (livello di patch) e l’analisi dell’assetto paesaggistico attorno alle fitocenosi indagate (livello di paesaggio). Le analisi di paesaggio sono state effettuate tramite strumenti GIS. Vari modelli di regressione sono stati utilizzati per mettere in relazione la diversità di specie vascolari con le variabili di paesaggio e gestionali. La sopravvivenza delle specie dipende profondamente dalle dinamiche del paesaggio e dalla sua configurazione spaziale (Paper I). Più nello specifico, nei casi di studio in cui le variabili stazionali e gestionali sono ininfluenti o omogenee in tutti i siti, la diversità di specie vascolari è profondamente influenzata dalle variabili spaziali (Paper II e III). Dove invece la gestione altera sostanzialmente l’equilibrio della fitocenosi, l’effetto è indipendente dalle variabili di paesaggio (Paper IV). In generale, i principi ed i metodi dell’ecologia del paesaggio che sono stati utilizzati nei casi di studio presentati, hanno permesso di quantificare precisamente i processi e le dinamiche che influenzano la diversità di specie vascolari a differnti scale spaziali e temporali.
Potdar, Madhukar Vishwanathrao. "Interference in monocultures and mixtures of orchardgrass (Dactylis glomerata L.) and timothy (Phleum pratense L.)." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/27510.
Full textLand and Food Systems, Faculty of
Graduate
Viketoft, Maria. "Soil nematode communities in grasslands : effects of plant species identity and diversity /." Uppsala : Dept. of Ecology, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200748.pdf.
Full textDeery, Sarah Jane. "Monitoring rhizosphere microbial communities of tomato." Thesis, University of Nottingham, 2012. http://eprints.nottingham.ac.uk/12759/.
Full textGosper, Carl R. "Consequences of weed invasion and control on plant-bird interactions and bird communities." Access electronically, 2004. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20050221.155953/index.html.
Full textParker, John. "Plant-herbivore interactions consequences for the structure of freshwater communities and exotic plant invasions /." Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-11182005-131013/.
Full textMark E. Hay, Committee Chair ; Julia Kubanek, Committee Member ; Joseph Montoya, Committee Member ; J. Todd Streelman, Committee Member ; David M. Lodge, Committee Member. Includes bibliographical references.
Parker, John D. "Plant-herbivore interactions : consequences for the structure of freshwater communities and exotic plant invasions." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/9460.
Full textCaraDonna, Paul James, and Paul James CaraDonna. "Temporal Ecology of a Subalpine Ecosystem: Plant Communities, Plant-Pollinator Interactions, and Climate Change." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/620860.
Full textPrins, Natalie. "The restoration of riparian plant communities following alien plant clearing in the Western Cape." Master's thesis, University of Cape Town, 2002. http://hdl.handle.net/11427/6164.
Full textFew of the riparian zones of the Western Cape Province, South Africa, can still be described as 'natural', as many, if not all, have been impacted upon in one way or another. They are, therefore, frequently disturbed environments that are highly susceptible to invasion by alien plants. the vegetation of riparian zones controls the flow of water, nutrients and sediments into streams. Plan communities in these habitats are often rish in species, and serve as corridor facilitating the movement of organisms.
Toogood, Sarah Elizabeth. "Response of wet grassland plant communities to water regime." Thesis, University of Brighton, 2005. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.413101.
Full textShaw, Christopher James. "Damping-off within natural and disturbed kwongan plant communities." Thesis, Shaw, Christopher James (2019) Damping-off within natural and disturbed kwongan plant communities. PhD thesis, Murdoch University, 2019. https://researchrepository.murdoch.edu.au/id/eprint/56892/.
Full textMadgwick, Genevieve. "Long term changes in aquatic plant communities in English lowland lakes." Thesis, University of Stirling, 2009. http://hdl.handle.net/1893/2270.
Full textEstes, Becky Lynne Gjerstad Dean H. "Impact of interacting disturbances on longleaf pine communities." Auburn, Ala., 2006. http://repo.lib.auburn.edu/Send%206-15-07/ESTES_BECKY_24.pdf.
Full textCronje, HP, MD Panagos, and BK Reilley. "The plant communities of the Andover Game Reserve, South Africa." Koedoe: Research Journal of the South African National Parks, 2008. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001060.
Full textSwedo, Barbara L. "Plant-microbe associations controls on soil bacterial community structure and consequences for aboveground plant communities /." [Bloomington, Ind.] : Indiana University, 2008. 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:3337259.
Full textTitle from PDF t.p. (viewed on Jul 28, 2009). Source: Dissertation Abstracts International, Volume: 69-12, Section: B, page: 7260. Adviser: Heather L. Reynolds.
Johansson, Per. "Effects of habitat conditions and disturbance on lichen diversity : studies on lichen communities in nemoral, boreal and grassland ecosystems /." Uppsala : Dept. of Conservation Biology, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/200606.pdf.
Full textKathiria, Palak, and University of Lethbridge Faculty of Arts and Science. "Incompatible and compatible plant pathogen interactions." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2006, 2006. http://hdl.handle.net/10133/351.
Full textxvi, 147 leaves : ill. (some col.) ; 29 cm.
Miller, John. "The classification and mapping of the Casuarina pauper woodlands of the Scotia 1:100 000 map." Thesis, Federation University Australia, 1998. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/164873.
Full textGordon, Carol Sue. "Soil properties and native plant communities in a Kansas prairie." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1840.
Full textThesis research directed by: Dept. of Natural Resource Sciences and Landscape Architecture. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Murphy, Stephen J. "Assessment of fish and plant communities in Lake Apopka, Florida." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0012980.
Full textHellström, K. (Kalle). "Variation in grazing tolerance and restoration of meadow plant communities." Doctoral thesis, University of Oulu, 2004. http://urn.fi/urn:isbn:9514274938.
Full textTiivistelmä Perinteisellä tavalla hoidettujen luonnonniittyjen pinta-ala vähenee kaikkialla Euroopassa. Tarvitsemme enemmän tietoa siitä, miten näiden elinympäristöjen lajiston monimuotoisuus voitaisiin turvata. Tietämys laidunnuksen ja niiton vaikutuksesta kasviyhteisöihin ja toisaalta yksittäisiin kasvilajeihin tai toiminnallisiin kasviryhmiin voi auttaa tehokkaiden hoito- ja ennallistamistapojen löytämisessä. Tässä työssä tutkittiin niittyjen lajirikkauden palauttamista kahdessa yhteisötason kokeessa: lammaslaidunkokeessa ja kokeessa, jossa eri niittotapojen vaikutuksia selvitettiin. Kolmessa lajitason kokeessa testattiin monokarppisten ruohokasvien (rantaukonnauris, horkkakatkero, ketosilmäruoho) kompensaatiokykyä simuloituun herbivoriaan (10–50 % varresta poistettiin). Monivuotista kannusruohoa käytettiin tutkittaessa onko klonaalisesta integraatiosta hyötyä herbivorian siedossa. Tätä selvitettiin kasvukokeella ja hiili-13-merkkiainekokeella. Sekä laidun- että niittokokeessa matalat ruohokasvit saivat kasvutilaa korkeiden ruohojen valta-aseman vähentyessä. Laidunnus lisäsi lajimäärää 30 % koealaa kohti, mutta niitto ei vaikuttanut lajirikkauteen. Molemmissa kokeissa kasviyhteisö oli luultavasti siemenrajoitteinen. Tällaisissa kohteissa siementen lisäystä voitaisiin käyttää ennallistamiskeinona. Toiminnalliset kasviryhmät olivat käyttökelpoisia ennustettaessa laidunnuksen vaikutuksia kasviyhteisöön. Aikaisin kasvukaudella tapahtuva niitto/laidunnus näyttää sopivalta hoitokeinolta umpeenkasvaneilla niityillä. Lajitason kokeissa kaikki tutkitut kasvilajit kykenivät melko hyvin kompensoimaan vähäisiä vaurioita. Ylikompensaatiota havaittiin vasteena kärkivaurioihin erityisesti, kun kasvuolot olivat edulliset. Tämä tuki ns. kompensaatiojatkumohypoteesiä. Tutkituilla lajeilla voi olla yhtenäinen haaraton kasvumuoto, jossa ajoittaiset kärkivauriot johtavat lepotilassa olevien silmujen aktivoitumiseen ja lievään ylikompensaatioon. Nämä vasteet voivat olla seurausta sopeutumisesta valokilpailuun pikemmin kuin sopeutumisesta ennustettavissa olevaan herbivoriaan. Kannusruoholla vaurioituneita versoja ei autettu, vaan kloonin sisällä versot näyttävät kilpailevan keskenään juuriresursseista. Koska laji kasvaa häirityillä paikoilla, sille näyttää olevan edullisempaa investoida uusiin versoihin. Tämä työ osoitti, että vaikka perinteisen matalakasvuisen lajirikkaan niityn ulkonäkö ja rakenne voidaan palauttaa viidessä vuodessa, on vaikeampaa lisätä lajirikkautta pelkän niiton tai laidunnuksen avulla. Tietämys yksittäisten kasvilajien vasteista biomassan menetykseen voi auttaa sopivien hoitotapojen suunnittelussa. Lisää kokeita eri hoitotapojen vaikutuksista ja eri niittytyypeillä tarvitaan pikaisesti näiden arvokkaiden elinympäristöjen monimuotoisuuden ylläpitämiseksi
Hacking, Rachel. "The plant communities of disused railway ballast in Great Britain." Thesis, Edge Hill University, 2014. http://repository.edgehill.ac.uk/7990/.
Full textThrift, John H. "Effects of white-tailed deer herbivory on forest plant communities." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1193078968/.
Full text