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 13 of 13 for “"leaf litter decomposition"”.
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The Effects of Ecological Restoration on Soil Microbial Enzyme Activities and Leaf Litter Decomposition
… restoration on soil enzyme activities and decomposition. The activities of five enzymes: phosphatase, ?-glucosidase, ?-N-acetylglucosadminidase (NAGase), phenol oxidase, and lignin-peroxidase were measured in both soils and on decomposing Quercus falcata leaf litter in unburned, burned, and …
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The influence of current year fire on leaf litter decomposition rates and microbial enzyme activity in forests undergoing ecological restoration
… and has the potential to change rates of decomposition and nutrient cycling through changes in environmental conditions or leaf litter composition. Restoration projects to reduce the effects of mesophication include thinning the canopy to remove mesophytic species and prescribed burn …
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Drivers of leaf litter decomposition along a successional gradient in the upland Andes: linking environment, functional traits, biodiversity, and carbon cycling
Comprender los mecanismos que controlan la descomposición de la hojarasca es clave para explicar la dinámica del carbono en ecosistemas tropicales de montaña. Esta tesis doctoral tuvo como objetivo identificar los principales factores bióticos y abióticos que determinan la descomposición de la …
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Effect of a Water Treatment BMP on Nutrient Spiraling and Leaf Litter Breakdown in an Urban Stream
… the effect of this BMP on nutrient spiraling and leaf litter decomposition in a 2 km stretch of Weracoba Creek. I hypothesized the BMP would (1) reduce leaf mass loss over time and (2) interfere with nutrient concentrations and uptake lengths. I characterized leaf litter decomposition using tulip …
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Evaluation of Ecological Function of Urban Riparian and Stream Systems: Guiding Ecological Restoration in Austin, Texas, USA
… ecosystem function of a group of urban streams, leaf-litter decomposition was used as an integrated metric for assessing anthropogenic impacts. I measured leaf-litter decomposition rate with two species, Texas Red Oak (Quercus texana) and American Sycamore (Platanus occidentalis), as a response …
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Ecology of acidification and recovery in Welsh upland streams
… in stream ecosystems, benthic algal grazing and leaf decomposition. Grazer impacts on algal abundance were generally feeble and largely unaffected by acid stress. Leaf litter decomposition was impaired by acidification, due largely to reduced microbial breakdown. Prospects for biological recovery …
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Ecosystem Functional Consequences Of Body Size Variation In An Apex Predator (Ambystoma jeffersonianum)
… phytoplankton, and periphyton, as well as leaf-litter decomposition rates and release of soluble nutrients in cattle tank mesocosms. Although sibship diversity did not lead to populations of variable body size, it was positively related to larval density and survival to metamorphosis in A. …
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Effects of Forest Regeneration Methods on Salamander Populations in Central Appalachia
… and ecosystem processes, specifically leaf litter decomposition. We constructed 12 in situ field mesocosms and I manipulated densities of red-backed salamanders into zero, low, and high density treatments. From June 2006-June 2008, I estimated invertebrate abundances, rates of leaf …
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The effects of invasive slender false-brome (Brachypodium sylvaticum) on forest ecosystem function in western New York
… soil moisture, soil respiration, and decomposition of leaf litter. I used generalized linear mixed models to determine variables that were the strongest predictors of soil nutrients, soil respiration, and leaf litter decomposition. All soil characteristics measured were significantly …
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Investigating the efficiency of reforestation approaches in restoring rainforest biodiversity and function
… dung beetlemediated secondary seed dispersal, leaf litter decomposition rates and decomposition multifunctionality (dung and litter decomposition). Functional trait-based metrics provided a clearer pattern of mammal recovery than traditional species-based metrics. Functional diversity metrics …
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Multi-scale analysis of carbon stocks and process indicators in the agro-ecosystem of Canterbury, New Zealand
… primarily at the shelterbelt and paddock level. Leaf litter decomposition and microbial activity were twice as high and invertebrates were more active in native shelterbelts compared to exotic shelterbelts, and variability in these indicators were best explained by within-shelterbelt factors …
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Impacts of nanoparticles to microbes and invertebrates: from community responses to cellular targets
… microbes, predominantly fungi, decompose plant litter from riparian vegetation and transfer carbon and energy via invertebrate shredders to higher trophic levels. Freshwater decomposers are sensitive to changes in water quality with implications to ecosystem functioning. Considering the recent …
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Productivity and nutrient relations of trees in deciduous forests differing in tree species diversity
… und mittels eines Streuzersetzungsexperiments ( litterbag experiment ) wurden 22 Monate lang die Abbauraten der Streu, des Ligningehaltes in der Streu und die Nährstofffreisetzungsraten bestimmt.Die gesamte oberirdische Biomasse ist signifikant mit der Baumartendiversität von 480 auf 200 Mg ha-1 …