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.
Results
Showing 1 to 20 of 24 for “"Ecosystem stability"”.
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Functional diversity enhances detection of ecosystem stability and resolution of predator-prey interactions within a multitrophic community
… which in turn has a negative impact on ecosystem function. There has been growing interest in understanding diversity’s role in the mechanisms behind ecosystem resilience with much attention focusing on how functional diversity, or the range of species’ ecological roles in a community, …
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Resilience in marine ecosystems: the effects of environmental and ecological context on ecosystem multistability
In recent times, disturbances in ecosystems due to anthropogenic and natural drivers have become increasingly prevalent. Many previous studies have tried to understand and quantify how these disturbances influence food web dynamics and ecosystem functioning and ultimately how this affects overall …
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Development and application of a microbial reliability model to analyze denitrifying biofilter stability
… to nitrogen gases. As with many engineered ecosystems, performance stability of the biofilters is of concern. While much research has focused on stability concepts in ecology, there is no consensus on the nature of the relationships between microbial diversity, functional redundancy, and …
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The stability of model ecosystems
… two fundamentally different routes to study ecosystem stability of model ecosystems: classical community ecology and classical population ecology. In community ecology models, we can study the mathematical mechanisms of stability in general, large model ecosystems. In population ecology …
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An assessment of wetland vulnerability to artisanal mining in Zimbabwe
… sub-Saharan Africa, is crucial for biodiversity, ecosystem stability, and water availability. These face escalating threats from factors such as rapid population growth, agricultural expansion, and, more importantly, emerging illegal artisanal mining. To address these challenges, this study …
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Elevational Gradients Shape Bee Network Structure and Community Composition Across Tropical Lowland to Montane Forests in Costa Rica
… plants and pollinators, play a crucial role in ecosystem stability and resilience. Previous theoretical work has posited that mutualistic networks with higher diversity, connectance, nestedness, interaction diversity and more generalist species are more resilient and stable. However, in some …
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Molecular Characterization of Stress Response in Western Honey Bee (Apis mellifera)
… plants and the sustainability of agricultural ecosystems. However, they face various stressors such as pesticides, pathogens, habitat loss, and climate change. Extensive research has been conducted to understand how bees respond to these stressors. Scientists have discovered that honey bees …
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Drivers And Dynamics Of Harmful Algal Blooms: Understanding Nitrogen Fixation And Bloom Composition In Minnesota Temperate Lakes
… play fundamental roles in structuring freshwater ecosystems by driving biogeochemical processes, regulating nutrient cycling, and maintaining ecosystem stability. Among these microbial communities, harmful algal blooms (HABs), dominated by cyanobacteria capable of producing toxins, have emerged as …
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Timing matters: Responses of a mesic old-field meadow to global change manipulations differed after five versus 13 years
… availability shape community structure and ecosystem productivity in temperate mesic grasslands, while herbivory is a key top-down driver. As precipitation regimes shift, nutrient loading rises, and herbivore populations change, none of these drivers will act alone. Yet, no study has …
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A MARINE PATHOGENIC PROTIST ACROSS SCALES: HOST-MICROBIOME INTERACTION, PROVENANCE, MORPHOLOGY AND TAXONOMICAL CHARACTERIZATION OF THE SCUTICOCILIATE PARASITE OF DIADEMATIDAE
… pose growing threats to biodiversity and ecosystem stability, yet the ecological behavior, taxonomic identity, and host interactions of many pathogens remain poorly resolved. This dissertation presents an investigation into how the scuticociliate parasite responsible for mass mortality in …
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Stability and Dynamics of Resource Consumer Ecosystems
Natural ecosystems, ranging from microbiomes to forests, significantly influence humanity by affecting individual health and promoting the sustainable growth of whole society. Understanding the collective properties like diversity, stability, and diversity-stability relationships of a large complex …
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Functional Genomic Examinations Of Interactions Between Common Members Of The Human Gut Microbiota
… glycans as a nutrient foundation that ensures ecosystem stability.
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Landscape-scale habitat requirements of flower-visiting insects in the Nene Valley Nature Improvement Area
… diverse community of insects is essential for ecosystem stability and continued agricultural prosperity. As human populations continue to increase so do the pressures on the natural environment, therefore it is important to ensure pollinator services for the future. Landscape structure may …
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Keanekaragaman Arthropoda pada lahan bawang merah semi organik dan anorganik Desa Torongrejo Kota Batu
… diversity can be used as an indicator of ecosystem stability, so that the study aims to identify arthropods, knowing the importance of diversity the spring onion farm semi organic and inorganic Torongrejo village of Batu. The research was conducted in the Torongrejo village of Batu and …
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Investigations of Phytoplankton Diversity in Chesapeake Bay
… in relation to environmental conditions and ecosystem functions are core concepts in ecology. While decades of research have led to a growing comprehension of diversity in many ecosystems, our understanding in aquatic habitats and microbial organisms remains relatively limited. Phytoplankton …
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Organic farming: science and ideology in a technological dispute
… forms of plant nutrient absorption to long-term ecosystem stability) are investigated organized around three sets of dichotomies (acute/chronic, chemical/biological, romantic/classic). The key findings are two: overall the evidence is ambiguous and the opposing scientists are really asking …
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Dynamics and Characterization of Soil Organic Matter on Mine Soils 16 Years after Amendment with Topsoil, Sawdust, and Sewage Sludge
… and mine soil quality is essential to long-term ecosystem stability. The objectives of this study were (i) to determine the comparative ability of topsoil, sawdust, and sewage sludge amendments, after 16 years, to positively affect mine soil quality using the following key soil quality variables: …
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The spatial ecology and behaviour of the broadnose sevengill shark (Notorynchus cepedianus) in South Africa
… predators are an important component of healthy ecosystems, contributing to ecosystem stability and biodiversity through direct and indirect effects. However, significant knowledge gaps exist in our understanding of the occurrence, biology and spatiotemporal dynamics of marine predators, limiting …
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The importance of interaction strength for food web dynamics and ecosystem functioning
… to understand the mechanisms that drive the stability and structure of these complex communities in a bid to inform nature conservation and management. Two fields of research have had high profile success at developing theories related to these stabilising structures and testing them through …
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The effects of forest degradation on arboreal apes within Sikundur, the Gunung Leuser Ecosystem, Northern Sumatra.
… tropical deforestation and degradation affects ecosystem stability and the fauna that inhabit tropical forests. As anthropogenic disturbance removes available habitat for rainforest species and degrades remaining forests, a multitude of species are threatened. There is a need to develop methods …
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