Environmental Factors Affecting Microbial Community Size, Activity, and Metabolic Diversity in New Jersey Pineland Soils PDF Download

Author: Barbara Fassuliotis Rogers
Publisher:
ISBN:
Category : Microbial ecology
Languages : en
Pages : 298

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Author: A. Violante
Publisher: Elsevier
ISBN: 9780444510396
Category : Science
Languages : en
Pages : 464

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Soil MineralOrganic MatterMicroorganism Interactions and Ecosystem Health presents up-to-date information on the dynamics, transformations and bioavailability of xenobiotics in soil and their impact on ecosystem health, the ecological significance of interactions of metals and metalloids with soil colloids, enzymes and microbial biomass and the role of minerals-organic matter - soil biota interactions in the restoration of perturbed ecosystems. The title comprises two volumes: Volume A: Dynamics, Mobility and Transformation of Pollutants and Nutrients. Volume B: Ecological Significance of the Interactions mong Clay Minerals, Organic Matter and Soil Biota. This title could serve as a basic reference for students, teachers, and researchers by providing in-depth knowledge of the current state of the art in a particular area of soil science.

Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 852

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Author:
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 848

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Author: William Joel Landesman
Publisher:
ISBN:
Category : Nitrogen cycle
Languages : en
Pages : 186

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I studied the potential effects of a change in the amount, frequency and timing of precipitation on soil microbes and nitrogen cycling in the New Jersey Pinelands. I performed a two year field manipulation of precipitation amount and measured the response of the microbial community, potential net nitrogen mineralization and amino acid production. I found that soil microbes were not affected by rain exclusion or a doubling of rainfall. Nematode densities, but not community composition, were sensitive to precipitation amount. A large accumulation of ammonium in drought plots suggested sustained microbial activity under extreme drought conditions. I observed small changes in potential net nitrogen mineralization due to the effects of soil moisture on diffusion and immobilization. I measured the short-term response of the microbial community to a rewetting of dry soil and found a very rapid (three hour) change in the microbial community. The accumulation of ammonium within drought plots appears to have suppressed fungal biomass following the rewetting event. In a two year winter study, I found no long-term effect of supplemental winter rainfall on the soil microbial community. Elevated winter precipitation prevented ammonium accumulation, presumably by protecting plant roots from freeze damage. I found that supplemental watering insulates soil microbes from cold stress over the short-term (days), but that mid-winter declines in biomass due to cold soil. These experiments demonstrate that soil microbial communities in Pinelands soils are highly tolerant of abiotic stressors such as drought, upshock stress and soil freezing. Recovery from these disturbances is extremely rapid, occurring on the scale of hours to days. I conclude that changing precipitation patterns will not have a direct, long-term effect on soil microbial communities. Changes in precipitation patterns are more likely to alter nitrogen cycling rates via the influence on nitrogen diffusion and plant and microbial uptake. Furthermore, precipitation-induced changes in nematode densities may have important implications for nitrogen cycling in the New Jersey Pinelands.

Author: Hongchen Jiang
Publisher: Frontiers Media SA
ISBN: 2832533507
Category : Science
Languages : en
Pages : 191

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Author:
Publisher:
ISBN: 9783036525105
Category : Science
Languages : en
Pages : 154

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Author: American Society of Agronomy
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 460

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Author:
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 746

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Coverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.

Author: American Society for Microbiology. General Meeting
Publisher:
ISBN:
Category : Bacteriology
Languages : en
Pages : 828

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