Anaerobic microflora of Everglades sediments: effects of nutrients on population profiles and activities

Article Abstract:

There is an increase in the anaerobic bacterial populations in the Everglades sediments that receive agricultural runoff. Phosphorous initially increases acetate production and decreases methane formation in the microflora in sediments closest to the agricultural runoff. Sulfate also enhances acetate formation but has no influence on methane production. Nitrate decreases the formation of acetate and methane. In microsomes, acetate is an important sources of methane and any additional hydrogen is involved in the formation of acetate through CO2-dependent acetogenesis.

Physiological aspects, Environmental aspects, Nitrates, Agricultural pollution, Phosphorus, Phosphorus (Chemical element)

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Acetogenic capacities and the anaerobic turnover of carbon in a Kansas prairie soil

Article Abstract:

Acetogenic anaerobic bacterial action on endogenous organic matter in Kansas prairie oxic soils produces acetate and CO2 as the major carbonaceous products. The bacteria consume supplemental H2 and CO2 to produce acetate. There is no methanogenesis as a result of the H2 uptake. The bacteria survive aerobic drying and alternating periods of O2 enrichment. Acetate synthesis in the microsites varies depending on the climate and ecology. The synthesis of acetate in anaerobic microsites of oxic soils provides a trophic link between aerobic and anaerobic bacteria.

Observations, Soil microbiology, Acetates

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Evidence for involvement of gut-associated denitrifying bacteria in emission of nitrous oxide (N(sub 2)O) by earthworms obtained from garden and forest soils

Article Abstract:

Denitrifying bacteria in the gut of earthworms are responsible for the emission of nitrous oxide by the earthworm. This emission accounts for about one-third of the nitrous oxide emitted by garden soil.

Nitrous oxide, Denitrification, Earthworms

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