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 18 of 18 for “"soil fauna"”.
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The effect of reduced cultivation on selected soil fauna
… fuel energy, and tends to increase the rate of soil erosion. The introduction of reduced tillage systems has led to savings in both labour and energy, and to increased soil conservation. Changes in cultivation regimes bring about changes in soil characteristics which will in turn affect the …
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Belowground impacts of regenerative agriculture in a South African seed production system
… causes rapid biodiversity loss, large scale soil erosion and agroecosystems to become stuck in negative feedback cycles. Agricultural management thus plays an important role in the stability and resilience of agroecosystems. Shifts towards more sustainable practices have been encouraged, with …
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A reassessment of the genesis of the Sangamon stone line and texture contrast profile in McDonough County, western Illinois
… According to erosion models, texture contrast soils with stone lines are developed in two parent materials where the stone line separates an underlying, truncated, often fine-textured autochthonous subsoil from a younger, overlying coarse-textured allochthonous hillslope deposit. The hillslope …
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A comparison of community composition analyses for the assessment of responses to wood-ash soil amendment by free-living nematodes
… methods of community assessment for free-living soil nematodes under forest harvesting disturbance and wood ash application. Neither morphological assessment (richness, abundance, diversity) nor molecular assessment (morpho-richness using T-RFLP) was responsive to experimental treatments. …
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Effects of neonicotinoids and fungicides on soil invertebrate communities and litter decomposition within restored prairie
… and fungicides can greatly impact the health of soil invertebrate communities. My study compares soil fauna community composition, abundance, species diversity, and litter decomposition across restored prairie plots treated with a neonicotinoid (clothianidin) and a fungicide (Captan). Soil …
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Vegetation management effects on fruit trees
… of the orchard floor management system on the soil condition, moisture and nutrient availability, beneficial soil fauna, pest/predator complexes, the fruit tree nutritional status, and weed suppression through possible allelopathic affects are also taken into account. Eleven preemergence …
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The functional role of understorey herbs for litter decomposition in temperate forests
… play an equally important role in regulating the soil microclimate as the overstorey tree canopy. Additionally, the understorey layer may also enhance forest floor litter quality, by providing a diverse and nutrient-rich litter to the forest litter layer, thus, directly and indirectly regulating …
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An Investigation into the successful establishment of a hay meadow community on clay capped landfill.
… only creates harsh growing conditions and poor soil quality but also results in an impoverished soil fauna making it a challenging environment in which to effect rapid habitat creation. It is currently unclear to what extent the established principles of hay meadow creation are transferable to …
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Belowground success: Collembola as indicators of restoration progress following active and passive restoration
… treatment after alien plant removal). Despite soils being so vital in the field of restoration, most studies to date have investigated the aboveground impacts of restoration, with few studies on invertebrate taxa, especially belowground soil fauna. This study assessed Collembola (springtail) …
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Quantifying the value of wildlife and wildlife-friendly farming for coffee agriculture
… particularly with regards to increased soil fauna diversity. Finally, we found that in areas of increased vegetative complexity, coffee farmers were more likely to cite ecosystem services they receive from the environment than those in less complex, more conventional farming …
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Trophic dynamics in the fine-root based food web: integrating resource heterogeneity, root herbivores, and root foraging
Resources in the soil are heterogeneously distributed. We know that plant species differ in their root responses to nutrient patches and that these differences in foraging can influence plant competition. However, most studies of root-resource interactions overlook the potential top-down influence …
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THE ROLE OF SPATIAL SCALES IN BIOGEOGRAPHY AND EVOLUTION OF SOIL-BORNE STREPTOMYCES
Soil microbes are critical to the sustenance of several nutrient cycles, communities of soil fauna, and ecosystem resilience and stability. Microbial biogeography allows us to understand how communities form and change over evolutionary time. My dissertation investigates the biogeography and …
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Short Rotation Forestry and Earthworm Diversity: Impacts and Responses
… and quantity of leaf litter, and its impact on soil fauna, of which the earthworm community is a major component. Earthworms have direct impacts on the soil biogeochemistry of SRF systems, and the tree species can impact on the associated earthworm community. The aim of this study was to …
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A morphological study of some of the immature stages of Cryptohypnus nocturnus eschscholtz, and a study of some ecological factors concerning wireworms : a preliminary study
… since the larvae spend several years in the soil. the direct loss of plants killed or injured is augmented by weed growth favored by the thinning of the crop. These increase the cost of production, and depreciate the value of the land. Thomas (1930) states that the depreciation in value of …
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Keanekaragaman dan kepadatan cacing tanah di Perkebunan Teh PTPN XII Bantaran Blitar
… umur teh, yang berpengaruh terhadap kehidupan fauna tanah, salah satunya adalah cacing tanah.Tujuan dari penelitian ini untuk mengetahui keanekaragaman, kepadatan dan hubungan faktor fisik-kimia dengan kepadatan cacing tanah yang terdapat di perkebunan teh PTPN XII Bantaran Blitar. Penelitian …
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Fire disturbance belowground: untangling consequences for soil food webs and organic matter
Soils and the ecological communities they house provide a diverse array of ecosystem services including the provisioning of food and fiber, decomposition and nutrient cycling, water filtration, and the maintenance of terrestrial biodiversity. These complex belowground communities, and therefore the …
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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
… los factores que determinan la diversidad de la fauna del suelo (riqueza, abundancia y tamaño corporal) y su influencia sobre la descomposición, evaluando hipótesis ecológicas clásicas. El cuarto objetivo examinó los factores que determinan la diversidad y composición de las comunidades fúngicas …