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 20 of 24 for “"ecosystem change"”.
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Global warming and world ecosystem distribution : toward quantifying ecosystem change
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1993.
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Social change: The influence of ecosystem change and the business sector
… sectors and community efforts to see social change. In particular, the business sector has an increasing presence in social change efforts. As businesses have not been traditional partners, social workers need to have a better understanding of the potential value and downsides of working with …
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Recent natural and anthropogenic ecosystem change to the marine environments of Biscayne Bay, Florida
… these data to assess the distributions of marine ecosystems over the past 100-400 years. Two of the cores are from localities in the mid-bay, whereas three represent near-shore sites. The latter cores were collected under the supposition that near-shore sites may be more sensitive to recent …
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Modeling lake ecosystem change within coupled human-natural systems to improve water resources management
Lake ecosystems are sentinels of change in a landscape, integrating upstream terrestrial and aquatic effects of climate and land use drivers. Climate and land use change is mediated by socio-cultural and economic processes, resulting in complex responses in lake ecosystems as a part of coupled …
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Spatially-Explicit Agent-Based Modeling of Ecosystem Change and Epizootiological Impacts on Caribbean Spiny Lobster, <i>Panulirus argus</i>
… used it to evaluate the likely consequences of changes in hydrology due to the Comprehensive Everglades Restoration Program on the spiny lobster and associated hard-bottom communities. I found that water quality changes associated with the restoration effort will likely reduce lobster …
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A System-Level Analysis of Migratory Shorebird Habitat Use, Diet, and the Influence of Climate-Driven Ecosystem Change in the Virginia Barrier Islands
… but these sites are threatened by climate change. The Virginia barrier island system supports over 100,000 shorebirds annually, including federally threatened red knots (Calidris canutus rufa) and other state and regional species of conservation concern such as dunlin (Calidris alpina) and …
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The Cape fur seal : monitoring and management in the Benguela Current ecosystem
… thesis was the Benguela Current Large Marine Ecosystem (BCLME) Programme’s project "Top Predators as Biological Indicators of Ecosystem Change in the BCLME" (LMR/EAF/03/02). The objectives of this project were to assess the utility of top predators as biological indicators of ecosystem change …
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Carabid Beetle Ecology as a Function of Disturbance in Temperate and Tropical Forests
… integral to structure and function of an ecosystem. With the majority of today’s forests recovering from past disturbance, knowledge of the changes and patterns of forest species in relation to disturbance events are important to our understanding of ecosystem change. The focus of this …
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Crustacea Zooplankton Communities in Icelandic Lakes Comparison Over Time
… form a key trophic link in freshwater ecosystems, grazing on phytoplankton and serving as prey for higher trophic levels. Monitoring biodiversity in Arctic and sub-Arctic regions is particularly important given ongoing rapid climate change. Communities were compared using data from two …
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Analysis of seabird observation and satellite tracking data in the Falkland Islands to assess suitability for proposing Marine Important Bird Areas
… easy to study, and act as bio-monitors of ecosystem change. The Falkland Islands seabird population has been extensively examined both at sea by observers on fishing and research vessels, and on land in telemetry projects. This project collated multiple at-sea observer and satellite …
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Benthic metrics as indicators of human disturbance in a marine-dominated lagoon
… along with the added stress of climate change, are negatively influencing coastal ecosystems. Because of their many benefits to mankind, it is important to identify key bioindicators that can detect disturbance-induced ecosystem change. Benthic metrics are an excellent example of …
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Spatiotemporal response of aquatic native and nonnative taxa to wildfire disturbance in a desert stream network
… species introductions and climate-moderated changes in disturbance regimes. Native conservation and nonnative species management could benefit from greater understanding of critical factors promoting or inhibiting native and nonnative success in the absence of human-caused ecosystem change. …
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Geospatial Technology/Traditional Ecological Knowledge-Derived Information Tools for the Enhancement of Coastal Restoration Decision Support Processes
… to assess the impacts of current and historical ecosystem change to community viability. The primary goal was to provide resource managers with a comprehensive method of assessing localized ecological change in the Gulf Coast region that can benefit community sustainability. Using Remote Sensing …
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Using applied palaeoecology and participatory system dynamics modelling to investigate changes in ecosystem services in response to climate and social-ecological drivers within the middle berg river catchment, South Africa
… are social-ecological systems that co-produce ecosystem services, which change over time in response to environmental, biotic and social drivers. Failure to consider this variability, and the feedbacks that cause system instability, can have consequences for sustainable ecosystem services …
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Walking the bridge from single- to multi-species approaches in Southern African fisheries management
… worldwide is in flux with calls for an EAF (Ecosystem Approach to Fisheries) needing to be balanced with the ongoing requirements to provide timeous and realistic assessment-based advice for management ( often with major economic and social consequences), that is typically based on …
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Characterization of Soundscapes in Shallow Water Habitats of the Florida Keys (USA) and Their Influence on the Settlement of Larval Fish and Invertebrates
<p>In recent decades, changes in climate and water quality in Florida Bay and the Florida Keys (FL, USA) caused expansive cyanobacteria blooms that in turn precipitated massive sponge die-offs that drastically altered sponge-dominated hard-bottom communities in south-central Florida Bay. This area …
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Quantifying Soil and Groundwater Chemistry in Areas Invaded by Tamarix spp. Along the Middle Rio Grande, New Mexico
… One of the most often cited mechanisms of ecosystem change by <em>Tamarix</em> is through its ability to deposit salty exudates and salt-rich leaf litter. The degree to which <em>Tamarix</em> relates to elevated soil and groundwater salinity, however, has not been adequately quantified, …
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IUCN red listing of marine macroalgal species : a South African case study
… have the potential to be used as indicators of ecosystem change for a region.
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Plant Successional Patterns at Sperry Glacier Foreland, Glacier National Park, MT, USA
Regional and local changes in the climate have been driving rapid glacial retreat in many glaciers since the Little Ice Age. This retreat provides a unique opportunity to study succession across the chronosequences of glacier forelands. Patterns of plant colonization and succession on terrain …
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Ant diversity and body size patterns across an altitudinal gradient in the Drakensberg Mountains, South Africa
… some smaller and some have recorded no change across elevational gradients. Even though these patterns have been well-documented, the majority of them did not study invertebrates. This is surprising given that invertebrates such as ants are widely regarded as powerful monitoring tools in …
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