Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"metacommunities"”.
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Spatiotemporally explicit incidence analysis of plant functional groups in metacommunities
Diese Arbeit untersucht die Rolle von Metagemeinschaftsmechanismen für die Diversität von Pflanzengemeinschaften in einer dynamischen, urbanen Landschaft. Dazu wird auf der Basis funktioneller Merkmale die relative Bedeutung von Ausbreitungslimitierung, abiotischem Stress und Konkurrenz bestimmt, …
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Metapopulations and metacommunities in dry forest openings in southern Illinois
… species fit the metapopulation model, and the metacommunities at each of the sites exhibited a Clementsian pattern, characterized by groups of co-occurring species that replace each other over the region due to turnover between the groups of species. Species that fit the metapopulation model …
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Strong Interactive Species in Metacommunities: The Interaction Between Dispersal and Daphnia magna in Zooplankton Communities
… of individuals across a region. As such, metacommunities are molded by two sets of processes: local and regional. Local factors are those that directly impact a single local community, such as environmental conditions, competition, and predation. On the other hand, regional factors affect …
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Disentangling the influence of dispersal on community assembly and stability
… of dispersal in stream metapopulations and metacommunities. Our current knowledge of the movement of freshwater taxa is limited due to difficulties in accurately monitoring dispersal. We have inferred the role of dispersal based primarily on organismal-based and graph-based proxies, although …
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The Influence of Metacommunity Connectivity and Invasive Species on Diversity and Ecosystem Properties: Invasion, Predation by Native Species, and Genetic Diversity of Propagules
… invasion success in both real and experimental metacommunities using freshwater plankton as a study system. The observational portion of this work (Chapter 2) examined zooplankton and phytoplankton community and ecosystem responses to zebra mussel invasion in 18 reservoirs spanning two natural …
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Species richness and metacommunity dynamics in bryophytes
… and spatial factors on bryophyte metacommunities. The results indicated that bryophyte species richness on boulders was not significantly affected by environmental and spatial parameters. In fact the variability of within-site species composition was comparable to across-site …
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Impact of environmental change on ecological communities.
… communities, biotic homogenization, metacommunities and climate tracking responses at an appropriate meso-sca1e. Although no evidence for nonanalogous communities was found, biotic homogenization was supported and appeared to be caused by increased nitrogen and decreased light …
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Spatiotemporal Variation in Dispersal as a Driver of Macroinvertebrate Metacommunity Dynamics
… Further study of macroinvertebrate dispersal in metacommunities is needed to better understand the complex mechanisms governing macroinvertebrate communities, particularly in the context of biomonitoring applications.
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Effects of diversity on community assembly dynamics in newly formed pond communities
… assembly dynamics in freshwater zooplankton metacommunities.
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The influences of hydrology and vegetation on emergent insect and benthic macroinvertebrate communities across space and time in seasonally inundated, geographically isolated wetlands
Geographically isolated wetlands are vulnerable to both land use and climate change because they are typically small, and are embedded in uplands. However, they support a diverse community of aquatic macroinvertebrates, including insects that serve as energy in upland food webs when they emerge as …