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 141 for “"Ecosystem Processes"”.
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Habitat variability and ecosystem processes in intertidal soft-sediments
Coastal and estuarine soft-sediment ecosystems are disproportionately important for ecosystem functioning (on a per m2 scale) as they serve as transitional environments, making them one of the most biologically productive places on earth. This productivity is underpinned by multiple ecosystem …
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Disturbance, Functional Diversity and Ecosystem Processes: Does Species Identity Matter?
… dynamics, physicochemical soil properties, and ecosystem processes. Additionally, plant functional diversity has been suggested as the key to ecosystem processes such as productivity and nutrient dynamics. I investigated how disturbance and functional composition both singly and in combination …
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Beyond productivity- Effects of extreme weather events on ecosystem processes and biotic interactions
… frequency. As these may affect vegetation and ecosystems more than gradual shifts in mean climatic parameters, investigating the consequences of extreme weather events recently became an important issue in climate change research. The main focus of most experiments investigating effects of …
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The Role of Volatile Organic Compounds on Soil Microbial Communities and Ecosystem Processes
… structure and function, which in turn drive ecosystem function. Research has focused on dissolved organic C (DOC) from litter leachates and root exudates. These compounds are often readily assimilable by soil microorganisms and are precursors for stable soil organic matter formation. Due to …
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THE EFFECTS OF LARGE HERBIVORES ON SMALL MAMMAL COMMUNITIES, PLANTS AND ECOSYSTEM PROCESSES IN NORTHERN ARIZONA
… that rely on those habitats, and the rates of ecosystem processes within those systems. These manifold impacts on systems are potentially magnifying, as removal of top predators and changes in land use have triggered large increases in large herbivore populations. Although increasing evidence …
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THE EFFECTS OF LARGE HERBIVORES ON SMALL MAMMAL COMMUNITIES, PLANTS AND ECOSYSTEM PROCESSES IN NORTHERN ARIZONA
… that rely on those habitats, and the rates of ecosystem processes within those systems. These manifold impacts on systems are potentially magnifying, as removal of top predators and changes in land use have triggered large increases in large herbivore populations. Although increasing evidence …
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Consideration of possible futures for peri-urban sites based on restabilising ecosystem processes : rewilding nature and people
… approach to conservation collectively hinders ecosystem function. Rewilding offers an alternative solution without the same limitations. While it is documented that large-scale rewilding projects have seen an increase in biodiversity, further empirical evidence is needed to establish whether …
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A multi-scale assessment of aquatic ecosystem processes across the land-ocean-atmosphere continuum: from headlands to the sea
… systems provide a unique cross-section of earth processes, linking terrestrial, aquatic, marine, and atmospheric reservoirs. Once thought to be passive pipes connecting land to sea, rivers are increasingly recognized as dynamic players in global carbon cycling. Rainfall mobilizes …
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Effects of plant invasions on ecosystem processes: Linking above- and below-ground resource-use strategies of native and invasive species in Eastern U.S. forests
… species worldwide and their potential impacts on ecosystems, the mechanisms that invaders alter ecosystem nutrient processes remain elusive. Invaders are often more productive than native species which suggests invaders may have different above- and below-ground resource-use strategies that can …
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Sponge Community Biocomplexity, Competition, and Functional Significance in Hard-Bottom Habitats of the Florida Keys, FL (USA)
<p>Sponges can have powerful effects on ecosystem processes in shallow, tropical marine ecosystems and are an integral component of the bentho-pelagic cycle of nutrients, via filtering of dissolved and particulate organic matter from the water column. The diversity of marine communities is thought …
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The influence of macrofauna on intertidal sediment stability and biogeochemical properties.
… was found to have as great an effect on selected ecosystem processes as a whole community. Variations in species density significantly changed the effect of the species on the measured sedimentary processes. Species richness effects were negatively interactive, with species mixtures underyielding …
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The effects of invasive slender false-brome (Brachypodium sylvaticum) on forest ecosystem function in western New York
… Some species become invasive and can impact ecosystems by changing soil, water, and nutrient dynamics. Disrupting these important ecosystem processes can facilitate further invasion. Slender false-brome (Brachypodium sylvaticum) is an exotic bunchgrass that is invasive in North America. Its …
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Recovery of southern Appalachian streams from historical agriculture
Stream ecosystems are influenced by the surrounding landscape, and agriculture within their catchments has changed many characteristics of streams. Agriculture has been a prominent land use activity in the southern Appalachian Mountains of the eastern United States for over 500 years. However, …
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Moving beyond the stream reach: Assessing how confluences alter ecosystem function and water quality in freshwater networks
… and nutrients are shaped both by in-stream processes and the surrounding landscape. Streams receive and transport materials from upstream and terrestrial sources that support in-stream ecosystem processes and regulate downstream water quality. Understanding how these processes within a …
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Essays on Water Policy and Coupled Human and Natural Systems
Human and freshwater ecosystems are intrinsically interconnected. To better design effective policies, modeling tools and valuation methods are necessary to help understanding the complex reciprocal linkages between ecosystem processes and human actions, and coupled human and natural systems (CNHS) …
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Investigation of covariability between energy fluxes and CO2 exchange over a semi-arid savanna (Kruger National Park) by Eddie Covariance Technique
… the connection between energy flows and Net Ecosystem Exchange (NEE) at the semi-arid savanna of Kruger National Park to gain a more detailed and accurate understanding of these processes, especially in semi-arid savannas that are susceptible to changes in environmental factors. By studying …
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Factors Influencing the Functional Roles of Crayfish in Stream Ecosystems
… abundant, juvenile crayfish may strongly modify ecosystem processes and benthic invertebrate assemblages in streams.
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Management Tools for Prescribed Burning for Tallgrass Prairie Restoration at the Lewisville Lake Environmental Learning Area
… area with tallgrass prairie, an endangered ecosystem. Essential ecosystem processes, especially fire, are part of restoration. To support fire management efforts at LLELA and surrounding areas, this project evaluated and developed tools for fire restoration. The four primary prairie grasses …
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The effects of habitat change on bird diversity and community structure in a mesic Savanna landscape
… maintain disturbance regimes in order to control ecosystem processes such as vegetation succession (Richards ef al. 1999). The relationship between disturbance, succession, vegetation change and habitat heterogeneity is crucial to managers because together they can influence biodiversity. For …
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