New PDF release: Advances in Microbial Ecology

By T. M. Fenchel, B. Barker Jørgensen (auth.), M. Alexander (eds.)

ISBN-10: 1461582199

ISBN-13: 9781461582199

ISBN-10: 1461582210

ISBN-13: 9781461582212

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Extra info for Advances in Microbial Ecology

Sample text

2. Meiofauna By meiofauna is meant benthic metazoa measuring less than 1 or 2 mm, and it includes groups such as rotifers, turbellarians, nematodes, gastrotrichs, tardigrades, harpacticoid copepods, and (small) oligochaetes. This heterogeneous assemblage of organisms undoubtedly plays a large role as a consumer of bacteria in nature. However, nearly all evidence is based on isolated observations on the feeding of different species or on laboratory experiments under somewhat unrealistic conditions.

Although bacterial photosynthesis is restricted to rather special environ- T. M. Fenchel and B. HL . PHOTOAUTOT ROPHIC OXIDATION BLAC DETRITAL ORGA Ie SULFUR 110N OSULFURIC ZONE REDUCT I GREY Q oc=:::>:> OF FERRIC HYDROXIDES PYRITE ZONE Figure 11. The sulfur cycle of aquatic sediments. ments, it may become a dominating process for the whole carbon cycle where it occurs (Culver and Brunskill, 1969; J~rgensen and Cohen, 1977; Takahashi and Ichimura, 1968). In most aquatic systems, the oxidation of H 2S is a dark process with 02 as the oxidizing agent.

Meiofauna By meiofauna is meant benthic metazoa measuring less than 1 or 2 mm, and it includes groups such as rotifers, turbellarians, nematodes, gastrotrichs, tardigrades, harpacticoid copepods, and (small) oligochaetes. This heterogeneous assemblage of organisms undoubtedly plays a large role as a consumer of bacteria in nature. However, nearly all evidence is based on isolated observations on the feeding of different species or on laboratory experiments under somewhat unrealistic conditions.

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Advances in Microbial Ecology by T. M. Fenchel, B. Barker Jørgensen (auth.), M. Alexander (eds.)


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