Dissertations / Theses on the topic 'Ecological disturbances'
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Christianou, Maria. "Interaction strength and responses of ecological communities to disturbances /." Linköping : Linköpings universitet, 2006. http://www.bibl.liu.se/liupubl/disp/disp2006/tek1002s.pdf.
Full textDogwiler, Toby J. "Fluvial disturbances in karst streams /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3060093.
Full textYang, Jian. "Spatially explicit and stochastic forest landscape model of fire disturbance and succession." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4174.
Full textThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (November 14, 2006) Vita. Includes bibliographical references.
Morgan, Michael Boyce. "Assessing coral stress responses at the level of gene expression." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/27985.
Full textPearson, Audrey F. "Natural disturbance patterns in a coastal temperate rain forest watershed, Clayoquot Sound, British Columbia /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/5513.
Full textPankey, Joel Robert. "Centaurea in the Columbia basin ecoregion : disturbance, invasion, and competition." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Dissertations/Spring2009/j_pankey_042109.pdf.
Full textOwusu-Afriyie, Kennedy. "Forest fire incidence, damage and control measures in Ghana." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2008. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=26030.
Full textSun, Wei. "Velvet mesquite (Prosopis velutina) encroachment and ecosystem CO₂ exchange in semiarid grassland insights from stable isotope measurements /." Laramie, Wyo. : University of Wyoming, 2009. http://proquest.umi.com/pqdweb?did=1960208391&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.
Full textThomas, Jonathan Armstrong White Joseph Daniel. "Modeling canopy foliar traits and disturbance interactions in central Texas woodlands." Waco, Tex. : Baylor University, 2009. http://hdl.handle.net/2104/5337.
Full textKariuki, Maina. "Modelling dynamics including recruitment, growth, and mortality for sustainable management in uneven-aged mixed-species rainforests." Connect to this title online, 2004. http://epubs.scu.edu.au/theses/27/.
Full textSanford, Monte Paul. "Using insect responses to anthropogenic disturbance to improve land management and conservation planning decisions." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3289458.
Full textTronstad, Lusha M. "Ecosystem consequences of declining Yellowstone cutthroat trout in Yellowstone Lake and spawning streams." Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1597617351&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.
Full textAllen, Bruce Peter. "Vegetation dynamics and response to disturbance, in floodplain forest ecosystems with a focus on lianas." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1179427491.
Full textAbdelnour, Alex Gabriel. "Assessing ecosystem response to natural and anthropogenic disturbances using an eco-hydrological model." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42899.
Full textLarouche, Julia Rose. "Thermokarst And Wildfire: Effects Of Disturbances Related To Climate Change On The Ecological Characteristics And Functions Of Arctic Headwater Streams." ScholarWorks @ UVM, 2015. http://scholarworks.uvm.edu/graddis/520.
Full textGray, Curtis A. "Impact of Climate Variability on the Frequency and Severity of Ecological Disturbances in Great Basin Bristlecone Pine Sky Island Ecosystems." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/6529.
Full textLjunggren, Johannes. "Störningsregimer vid Skövde övnings- och skjutfält : Stridsfordons påverkan på olika naturtyper i militära övningsområden." Thesis, Linnéuniversitetet, Institutionen för naturvetenskap, NV, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-21619.
Full textBottoms, Richard M. "Grass-knapweed interference involves allelopathic factors associated with ecosystem mineral cycling /." free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3036807.
Full textScherrer, Pascal, and n/a. "Monitoring Vegetation Change in the Kosciuszko Alpine Zone, Australia." Griffith University. Australian School of Environmental Studies, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040715.125310.
Full textScherrer, Pascal. "Monitoring Vegetation Change in the Kosciuszko Alpine Zone, Australia." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/366283.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Australian School of Environmental Studies
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Cheng, Yiwei. "Impacts of self-organizing mechanism and topography on wetland ecosystem dynamics." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47705.
Full textBockino, Nancy Karin. "Interactions of white pine blister rust, host species, and mountain pine beetle in whitebark pine ecosystems in the Greater Yellowstone." Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1594498141&sid=3&Fmt=2&clientId=18949&RQT=309&VName=PQD.
Full textAdams, Jennifer Karen. "Multiproxy reconstructions of recent environmental change : understanding the ecological response of shallow lakes within the Selenga River basin, southeast Siberia, to anthropogenic and natural disturbances." Thesis, University College London (University of London), 2017. http://discovery.ucl.ac.uk/10040922/.
Full textMatthee, Willem. "Factors affecting the success of reseeding rehabilitation in the semi-arid Karoo, South Africa." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/2889.
Full textCourret, Dominique. "Problématique des impacts de la gestion par éclusées des aménagements hydroélectriques sur les populations de poissons : caractérisation des régimes d’éclusées et du niveau de perturbation hydrologique." Thesis, Toulouse, INPT, 2014. http://www.theses.fr/2014INPT0127/document.
Full textHydropeaking management of hydroelectric facilities (more than 150 in France) generates sudden changes in flow on the river and can affect the composition, the abundance and the structure of fish and invertebrates populations over long distances. The objectives of this thesis were (1) to develop a method for characterizing hydropeaks within hydrograph and a synthetic indicator of hydrological disturbance, and (2) to progress in defining mitigation measures of hydropeaking impacts on fish. From the analysis of 97 stations and 1575 years of flow data, rate of change of natural flow variations have been characterized within 8 ranges between 5% and 4 times the mean inter-annual discharge. Formulas representing the "fastest variations possible naturally" and taking into account the type of change (increase or decrease), the size of the stream (via the mean inter-annual discharge) and the flow range over which the variation takes place have been constructed and then used to discriminate hydropeaks and natural events. From the analysis of 80 stations and 491 years of flow data affected by hydropeaks, a method was developed to identify, within the hydrograph, hydropeaks whose characteristics are beyond what can occur in natural hydrology, using 3 criteria: a minimum range (≥ 10% of the mean inter-annual discharge and ≥ 20% of the hydropeak base flow), a minimal rate of change (> to the maximum natural rate of change) and an upper limit on the maximum flow rate (to remove flood events). A large variation in hydropeaking regimes, due to the diversity of hydroelectric schemes and fluctuations in incoming flow and energy demand, was observed and illustrated […]
Clough, Elizabeth Anne, and n/a. "Factors Influencing Ant Assemblages and Ant Community Composition in a Sub-Tropical Suburban Environment." Griffith University. School of Environmental and Applied Science, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040719.141317.
Full textClough, Elizabeth Anne. "Factors Influencing Ant Assemblages and Ant Community Composition in a Sub-Tropical Suburban Environment." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/366528.
Full textThesis (Masters)
Master of Philosophy (MPhil)
School of Environmental and Applied Science
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Michelsen-Correa, Stephani. "Geomorphic response to restoration and disturbance: Grazing, fire, and flooding on the Middle Fork John Day River, OR." Thesis, University of Oregon, 2011. http://hdl.handle.net/1794/11290.
Full textSalmon habitat restoration is ongoing at a Nature Conservancy preserve on the Middle Fork John Day River in the Columbia River Basin in north-central Oregon. The site has a long history of disturbance including dredge mining upstream, channelization, grazing, logging, fire, and floods. Using historic aerial photos, habitat unit surveys, and cross sectional profiles, this thesis shows how the channel morphology, particularly habitat unit diversity, has changed since 1939, just before placer mining began. Results show that the dominant influence on present day channel morphology is channelization from the 1930's. Other changes including dredge mining in the late 1930's to early 1940's, cessation of cattle grazing in 1991, and a fire followed by a flood in the winter of 1996-1997, had less impact because of the straightened, stabilized channel morphology.
Committee in charge: Patricia McDowell, Chairperson; W. Andrew Marcus, Member
10000-01-01
Coulston, John Wesley Riitters Kurt Smith Gretchen Cole. "Large-scale analysis of sustainable forest management indicators assessments of air pollution, forest disturbance, and biodiviersity [sic] /." Connect to this title online, 2004. http://www.lib.ncsu.edu/theses/available/etd-03282004-103433/.
Full textImbeau, Louis. "Comparaison et suivi des communautés d'oiseaux nicheurs dans des pessières noires boréales issues de coupes et de feux /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1996. http://theses.uqac.ca.
Full textThorn, Simon Otto Verfasser], Jörg [Akademischer Betreuer] [Gutachter] Müller, Roland [Gutachter] Brandl, and Hanno [Gutachter] [Schäfer. "Effects of salvage logging on biodiversity - Ecological evidence for conservation-oriented management of natural disturbances / Simon Otto Thorn. Betreuer: Jörg Müller. Gutachter: Roland Brandl ; Jörg Müller ; Hanno Schäfer." München : Universitätsbibliothek der TU München, 2016. http://d-nb.info/1100689141/34.
Full textKisaka, Lily. "Modelling payment systems for environmental services in the Mt Elgon ecosystem of Kenya." Thesis, University of Fort Hare, 2014. http://hdl.handle.net/10353/d1013123.
Full textWijk, Madelene. "Biologisk mångfald på Torhamns övnings- och skjutfält." Thesis, Linnéuniversitetet, Institutionen för biologi och miljö (BOM), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-66925.
Full textThe increasing exploitation of land and the changes in land use over the last few hundred years has led to a marked reduction in the biodiversity of the landscape. Species populations have diminished in number or even gone locally extinct due to habitat loss. Research has shown that military training areas have become a refuge for many endangered species, partly due to the fact that these areas have been spared from exploitation of the land and partly due to the fact that these species have thrived as a result of the disturbance of habitat caused by military activity. This study aims to clarify which types of disturbance have had a positive effect on the biodiversity of Torhamns udde in South East Blekinge through history. In this investigation biodiversity is analyzed at the landscape and species levels. Earlier results from a pollen analysis north of the study area show that the region has been affected by land use over a period of several thousand years. The military activity that has taken place in the area over the last hundred years, has contributed to the preservation of the unique natural environment that exists there today. An important conclusion from this study is that changes in biodiversity are strongly connected with changes in land use. The present composition in the flora and fauna may thus largely be explained by the historical land use. In order to positively influence the biodiversity of a military training area, it is important to have a palaeoecological approach, when conservation and management plans are being set up.
Doherty, Kevin Eric. "Sage-grouse and energy development integrating science with conservation planning to reduce impacts /." [Missoula, Mont.] : The University of Montana, 2008. http://etd.lib.umt.edu/theses/available/etd-03262009-132629/unrestricted/doherty.pdf.
Full textAkama, Pierre. "Evaluation des perturbations de l'oléoduc Tchad-Cameroun sur les assemblages de termites." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209574.
Full textLes recherches ont été menées dans les écosystèmes de savane et de forêts camerounaises via deux méthodes d’échantillonnage. La méthode des transects belts d’Eggleton et Jones (2000) a permis de collecter 99 espèces de termites (36 transects dans 4 écosystèmes) ;en complément à celle-ci, la méthode quantitative des carottages de Wood et Sands (1978) a permis de récolter 70 espèces de termites (480 carottes). La différence de richesse spécifique résulte du sous échantillonnage par la méthode des carottages parce que certains habitats susceptibles d’abriter des termites ne sont pas explorés.
Les résultats obtenus montrent que l’infrastructure a perturbé sensiblement les paramètres texturaux, la densité apparente, les propriétés hydriques et la matière organique du sol. Il a diminué la richesse spécifique globale des termites, et essentiellement celle des humivores. Il a augmenté la densité des termites du groupe II et diminué celle des termites du groupe IV mais la densité globale des termites n’a pas été modifiée. En fait, les milieux témoins que nous avons échantillonnés étaient déjà moyennement dégradés avant la pose de l’oléoduc.
L’étude de l’évolution de la litière de Milicia excelsa en litter bags a permis de montrer que ni le l’infrastructure ni la variabilité des écosystèmes n’exercent un effet sur la vitesse de décomposition de cette litière ;en revanche, la dimension de la maille, autorisant ou non le passage des termites, a montré que ceux-ci interviennent pour environ 20 % dans la perte de masse de la litière.
L’apport expérimental d’infusions à base de Chromolaena odorata et d’Alchornea cordifolia a sensiblement abaissé le rapport C/N du sol mais n’a eu qu’un effet très limité sur les assemblages de termites.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished
Winberg, Pia Carmen. "Confronting the challenges of tidal flat conservation spatial patterns and human impacts in a Marine Protected Area in southern NSW, Australia /." Access electronically, 2008. http://ro.uow.edu.au/theses/123.
Full textHellberg, Erik. "Historical variability of deciduous trees and deciduous forests in northern Sweden : effects of forest fires, land-use and climate /." Umeå : Dept. of Forest Vegetation Ecology, Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/s308.pdf.
Full textPeterson, Garry D. "Contagious disturbance and ecological resilience." [Florida] : State University System of Florida, 1999. http://etd.fcla.edu/etd/uf/1999/amg2055/peterson%5Fg.pdf.
Full textTitle from first page of PDF file. Document formatted into pages; contains ix, 261 p.; also includes graphics. Vita. Includes bibliographical references (p. 248-260).
Guttmann, E. B. "Continuity and change in arable land management in the Northern Isles : evidence from anthropogenic soils." Thesis, University of Stirling, 2001. http://hdl.handle.net/1893/3551.
Full textRaicevich, Sasa <1973>. "Assessment of ecological disturbance in marine environments." Doctoral thesis, Università Ca' Foscari Venezia, 2004. http://hdl.handle.net/10579/540.
Full textMcCallum, Barry R. "The impact of mobile fishing gear on benthic habitat and the implications for fisheries management." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ62398.pdf.
Full textRoderick, Mary J. "Ecological Restoration and Urban Planning: Integrating to end distURBANce." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1242941905.
Full textRoderick, Mary. "Ecological restoration and urban planning integrating to end distURBANce /." Cincinnati, Ohio : University of Cincinnati, 2009. http://rave.ohiolink.edu/etdc/view.cgi?acc_num=ucin1242941905.
Full textAdvisor: Menelaos Triantafillou. Title from electronic thesis title page (viewed Aug. 18, 2009). Includes abstract. Keywords: Ecological Restoration; Urban Planning; Integration; Landscape Ecology. Includes bibliographical references.
Michalski, Fernanda. "Ecological consequences of habitat fragmentation and disturbance in Amazonian forests." Thesis, University of East Anglia, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432441.
Full textTomblin, David Christian. "Ecological niche responses of small mammals to gypsy moth disturbance." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06302009-040517/.
Full textNavarra, Jennifer J. "Species composition and spatiotemporal pattern of the seed bank and vegetation in native and degraded Florida rosemary scrub." Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4645.
Full textID: 028917091; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (M.S.)--University of Central Florida, 2010.; Includes bibliographical references (p. 108-123).
M.S.
Masters
Department of Biology
Sciences
Underwood, Emma Clare. "Consequences of ecological disturbance on ground dwelling invertebrates : implications for conservation /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.
Full textO'Connor, Christopher Daniel. "Spatial and temporal dynamics of disturbance interactions along an ecological gradient." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/311565.
Full textSchmitt, Susanne F. "Disturbance and succession on the Krakatau Islands, Indonesia." Thesis, University of Oxford, 1997. http://ora.ox.ac.uk/objects/uuid:a2b3257d-0a00-4286-a38a-01e3016da708.
Full textPearson, Neil. "Ecological genetics of Arabidopsis thaliana from reservoir populations in low-disturbance habitats." Thesis, University of Warwick, 2013. http://wrap.warwick.ac.uk/61699/.
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