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 6 of 6 for “"nutrient heterogeneity"”.
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Factors affecting root system response to nutrient heterogeneity in forested wetland ecosystems
Soil nutrients are often heterogeneously distributed in space and time at scales relevant to individual plants, and plants can respond by selectively proliferating their roots within nutrient-rich patches. However, many environmental factors may increase or decrease the degree of root proliferation …
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Impact of nutrient heterogeneity on plant response and competition in Coastal plain species
Relationships between nutrient heterogeneity, root foraging behavior and short-term competitive interactions were investigated for six species native to southeastern USA. Monoculture, two- and six-species garden plots were established and fertilized to create spatially homogeneous or heterogeneous …
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Nutrient Foraging in Ten Southeast Coastal Plain Plant Species
Plant root system response to nutrient heterogeneity was tested in ten plant species of varying life form and successional status. All plants tested are native to the South Carolina coastal plain. Morphological responses of the root system (scale, precision and discrimination) and overall plant …
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Micro-scale interactions between chemotactic bacteria and algae
… describe the ocean pelagic zone as a homogeneous nutrient-poor environment. Heterotrophic marine bacteria that have evolved high-energy mechanisms for swimming abilities and sensing nutrient gradients would gain no survival advantage under this model. Recent identification of microscale (<1cm) …
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Trophic dynamics in the fine-root based food web: integrating resource heterogeneity, root herbivores, and root foraging
… 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 of root herbivores. While root herbivores can influence plant …
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Soil Heterogeneity Changes During Forest Succession: Test of a Model Using Univariate and Geostatistics
… elucidate the temporal changes in soil spatial heterogeneity. Samples were collected from loblolly pine plantations representing reorganization through aggradation phases of succession, and from one set of oak-hickory stands to signify the steady-state phase of the model. These trends are …