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 12 of 12 for “"Ecosystem Metabolism"”.
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Quantifying the Ecosystem Metabolism of a Tidal Estuary as a Consequence of Aeration
… these systems respond to changing conditions. Ecosystem metabolism is an integrative, metric to measure how ecosystems change, and can act as the focus of comparative experiments. We leveraged an aeration system, to examine the ecosystem metabolism of the estuary through comparative …
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Ecosystem metabolism in coastal plain streams of southeast Louisiana : environmental and watershed effects
… oxygen curves for estimating the components of ecosystem metabolism in the lotic setting have been important in determining the current ecosystem theory of streams, both spatially among multiple systems and longitudinally within the same system, as well as identifying potentially impaired …
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Ecosystem metabolism in salt marsh tidal creeks and ponds : applying triple oxygen isotopes and other gas tracers to novel environments
… air-water exchange processes which affect metabolism tracers. These stable, natural abundance tracers complement traditional techniques for measuring metabolism. In particular, they highlight the potential importance of daytime oxygen sinks besides aerobic respiration, such as rising …
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Ecosystem metabolism in salt marsh tidal creeks and ponds : applying triple oxygen isotopes and other gas tracers to novel environments
… air-water exchange processes which affect metabolism tracers. These stable, natural abundance tracers complement traditional techniques for measuring metabolism. In particular, they highlight the potential importance of daytime oxygen sinks besides aerobic respiration, such as rising …
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Evaluating the role of flow and specific conductivity on stream metabolism across a mining-induced salinity gradient in the Appalachian Coalfield
… have been well documented in freshwater ecosystems, but there are few measurements assessing how salinity effects on organisms influence whole-ecosystem processes, specifically stream metabolism. Understanding how gross primary production (GPP) and ecosystem respiration (ER) respond to …
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Determining the Effects of Water Quality on Stream Metabolic Function of Urban Stream Corridors in Columbus, Georgia
… ecological structure, homogenizing once-diverse ecosystems and posing a risk of impairment or destruction. Continuous monitoring of stream ecosystem metabolism emerges as an essential tool for a comprehensive understanding and effective intervention in response to these challenges. This study …
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Modelling Stream Metabolism and Fish Biomass in Headwater Streams of the Eastern Cascades Mountains
… easily using models to estimate stream metabolism. The goal of my study was to relate whole-stream metabolism to fish biomass in 10 different headwater streams on the eastern slopes of the Cascade Mountains in Kittitas County, Washington. I estimated fish biomass on two occasions using a …
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Analyzing longitudinal patterns of river metabolism in five distinct rivers
… common frameworks or theories to describe river ecosystem structure and function. While these concepts help explain how rivers should behave, the reality is that aquatic ecosystems are being changed and degraded due to dams which regulate flow and changes to land use and land cover that can …
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The role of dissolved gas fluxes on the biogeochemical evolution of nutrient cycles in lakes.
… processes. O2 is a very important component in ecosystem metabolism, which includes photosynthesis and respiration, and N2 is important for N2 fixation and denitrification. P does not have a major gas component in lake ecosystems, but its cycling is very dependent on O2 concentrations. …
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Influence of Multiple Disturbances on Stream Structure and Function
… the influence of multiple disturbances on ecosystem structure and function in a headwater stream adjacent to an abandoned arsenic mine using an upstream (reference) and downstream (mine-influenced) comparative reach approach. In this study, floods were addressed as a pulse disturbance, and …
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The spatiotemporal dynamics of bacterial and fungal abundance in Great Plains non-perennial streams
… both downstream water quality and integrated ecosystem metabolism. Surface flow connectivity to the local microbial habitat provides organic energy and dissolved nutrients that support microbial growth, and in turn, nutrient immobilization. However, the sensitivity of microbial populations to …
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Effects of Anthropogenic Urea on Lakes of the North American Great Plains: Ecological Implications Based on Experimental and Observational Studies
… etc.), especially in phosphorus (P)-rich aquatic ecosystems. Biweekly measurements of urea content and limnological variables (water chemistry, hydrology, algae, zooplankton) during two summers in a chain of seven productive lakes in central Canada were used to quantify human and environmental …