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 “"Alternative Stable States"”.
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The mechanisms behind alternative community states: Understanding producer composition in temporary and semipermanent wetlands
… in that a discrete set of community states (or distinct taxa assemblages) have been observed repeatedly in one ecosystem type. Many hypotheses have been proposed to explain this discontinuous variation in community composition over space and time. I examined the applicability of these …
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Emergent behaviors in complex microbial ecosystems
… through three distinct dynamical phases: from stable coexistence, to partial coexistence, to the emergence of persistent fluctuations and alternative stable states in species abundances, confirming theoretical predictions. Notably, high biodiversity and dynamic fluctuations reinforce each other …
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Ecological resilience at semi-arid and temperate boundaries of the Mediterranean-type Fynbos Biome, South Africa, during the Holocene
… and potentially facilitate transitions between alternative stable states. Given the outstanding biodiversity of the Mediterranean-type fynbos biome in the Greater Cape Floristic Region (GCFR) of South Africa, understanding of the longterm impacts of global change are particularly important. In …
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Diversity, variability and persistence elements for a non-equilibrium theory of eco-evolutionary dynamics
… induce an abrupt regime shift between alternative stable states in the wintering waterfowl community. Overall, the natural systems studied are shown to posses features of complex systems: connectivity, autonomy, emergence, non-equilibrium, non-linearity, self-organization and …
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Kinky structures
… research focusing on the packed and deployed states of these structures, there is still considerable research to be done on the structural performance of the intermediate stages of deployment. Several forms of deployable structure, such as cable-chain arches for example, are vulnerable and …
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Taxonomic homogenization of plant communities in Illinois wetlands and the role of wetland compensation
… homogenized state. Incorporating concepts like alternative stable states may helpful in resolving these issues. In the second study, pairwise occurrence- and abundance-based dissimilarity metrics were calculated for 146 natural wetlands and 38 compensation wetlands to investigate whether …
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The palaeolimnological record of regime shifts in lakes in response to climate change
… regime shifts between clear-water and turbid states in Lake Krankesjön in southern Sweden. We combined palaeolimnological records and limnological monitoring data, concentrating on the documented collapse of the clear-water state in 1975 and the subsequent recovery in the late 1980s, in order …
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Managing herbivory over space and time: consequences for vegetation and cattle responses in African rangelands
… in switching savannas into tree-dominated alternative stable states, characteristic of woody plant encroachment (WPE) although this has not been tested at regional sales. Using three decades of satellite imagery, I found that woody plant cover has increased by 8% over sub-Saharan Africa and …
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Food web regulation under different forcing regimes in shallow lakes
… of shallow lakes is their appearance in alternative stable states. They are either in a clear-water or turbid state, where macrophytes and phytoplankton dominate, respectively. Both states can stabilize themselves through various mechanisms. These two alternative states and stabilizing …
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Effects of diversity on community assembly dynamics in newly formed pond communities
Theory suggests that the initial level of genetic or species diversity in a new habitat will influence community assembly dynamics. Previous studies have shown that species diverse communities can buffer against invasion by heterospecifics. In addition, the monopolization hypothesis predicts that a …