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 139 for “"belowground"”.
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Belowground Fungal Community Change Associated with Ecosystem Development
… critical to provide insight into aboveground and belowground linkages to ultimately include this new information into ecosystem theory. I hypothesized that fungal communities would change with pedogenesis, that these changes would correlate with vegetation community change, and that they should …
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Causes and consequences of prolonged dormancy: Why stay belowground?
… the growing season and instead remain alive belowground. Though it is relatively common, the causes and consequences of this intriguing stage have remained elusive. In this dissertation, I investigate the causes and consequences of prolonged dormancy in a long lived perennial herb, …
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Causes and consequences of prolonged dormancy: Why stay belowground?
… the growing season and instead remain alive belowground. Though it is relatively common, the causes and consequences of this intriguing stage have remained elusive. In this dissertation, I investigate the causes and consequences of prolonged dormancy in a long lived perennial herb, …
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Assessing belowground biomass changes following land management and vehicle disturbance
… disturbance and land management practices on belowground biomass. Military training effects on belowground biomass, the portion of the plant necessary for recovery, have not been researched exclusively previous to this study. Belowground biomass is inherently difficult to study because of the …
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Fire disturbance belowground: untangling consequences for soil food webs and organic matter
… of terrestrial biodiversity. These complex belowground communities, and therefore the ecosystem processes they regulate, are increasingly threatened by fire due to climate, land use, and management changes. Fires can have profound effects on the physical and chemical soil environment, with …
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Belowground Contributions of Pea and Canola to Soil Nitrogen Pools and Processes
… of this research was to quantify the input of belowground N (BGN), including rhizodeposits and roots, to soil and to investigate the influence of BGN on soil N cycling processes from the major pulse and oilseed crop grown across the Canadian prairies—namely, field pea and canola, respectively. …
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Connecting above- and belowground effects of climate warming on bumble bee health
… temperature in simulated nests both above- and belowground as well as air temperature from March to November of 2021 to understand what temperatures bumble bees experience in different environments. To understand how warming may impact nest thermoregulation and foraging, we examined the rates of …
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Belowground impacts of regenerative agriculture in a South African seed production system
… and species richness, two components of the belowground fauna were investigated. Firstly, arthropod diversity indices were compared between conventional agriculture and regenerative agriculture management strategies (Chapter 2). Four arthropod taxa were selected for study, providing …
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Belowground success: Collembola as indicators of restoration progress following active and passive restoration
… few studies on invertebrate taxa, especially belowground soil fauna. This study assessed Collembola (springtail) communities between active and passive restoration sites in comparison to invaded, non-restored sites as reference sites. Sampling was conducted during winter (2020) and winter and …
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Wildland Fire in the Central Appalachian Mountains: Impacts on Above- and Belowground Resources
Prescribed fire use in Virginia and West Virginia has increased over the past ten years as forest managers on public lands have increasingly used prescribed fire to meet management goals. These goals include hazardous fuel reduction, wildlife habitat restoration and management, and control of less …
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Belowground Carbon and Nitrogen Cycling in a Loblolly Pine Forest Managed for Bioenergy Production
… (C) and nitrogen (N) cycling, availability of belowground resources, and potential negative impacts of competition between pine and switchgrass on plant productivity. Three specific objectives were addressed in this study: 1) compare different bioenergy management regimes in regards to temporal …
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Effects of different canopy tree species on belowground biogeochemistry in a wet lowland tropical forest
… chemistry that affect both pools and fluxes of belowground resources. Yet, our understanding of the effects of aboveground biogeochemical heterogeneity on belowground ecosystems is poor, especially in the species-rich forests of the wet tropics. To investigate the effects of tree species …
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Effects of different canopy tree species on belowground biogeochemistry in a wet lowland tropical forest
… chemistry that affect both pools and fluxes of belowground resources. Yet, our understanding of the effects of aboveground biogeochemical heterogeneity on belowground ecosystems is poor, especially in the species-rich forests of the wet tropics. To investigate the effects of tree species …
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Detecting Change in Belowground Carbon Stocks: Statistical Feasibility and Future Opportunities from Loblolly Pine Forests
The substantial magnitude of belowground carbon (C) stocks suggests that even minor proportional changes in soil C concentrations could significantly affect global carbon budgets. However, measuring stock changes with sufficient statistical confidence proves difficult due to soil C heterogeneity. …
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The Fungal Connection: Characterizing the Ectomycorrhizal Community and Belowground Response to Restoration Treatments in Northern Mississippi.
… project in northern Mississippi, comparing the belowground fungal community on plant roots between replicated control and treatment plots. We also measured abiotic factors that may structure the ECM fungal community, including litter depth, canopy openness, burn regimen, and soil compaction. …
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The relationship between dominant forest mycorrhizal type and the belowground mycobiome of the sugar maple and eastern hemlock
… are known to have strong impacts on forests’ belowground biogeochemistry and non-mycorrhizal microbial communities, their roles in this process should be more explicitly considered. The objectives of this project were therefore to determine the impact of dominant forest mycorrhizal types on …
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The timing of growing season drought and its effects on above- and belowground production in a mesic grassland
… I investigated the response of both above- and belowground net primary production (ANPP & BNPP) to reductions in precipitation in a mesic, tallgrass prairie in NE Kansas. Experimental plots were subjected to one of three drought treatments (25% reductions in the average growing season …
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Belowground Carbon Budget and Nutrient Uptake of Temperate Forest Species in Response to Elevated Carbon Dioxide and Temperature
… of carbon in forest ecosystems is lost from belowground through root respiration. Maintenance respiration of attached fine roots was measured on mature loblolly pine and sweetgum (Liquidambar styraciflua ) growing in atmospheric CO2 elevated by 200 mu1 1 -1 above ambient. Fine root …
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