Microbial breakdown of Phaeocystis mucopolysaccharides
Article Abstract:
Study of the degradability of Phaeocystis mucus carbohydrates by heterotrophic bacteria is discussed. The study used partially purified mucus as a substrate in oxic and anoxic enrichments of marine bacteria. The degradable of the important part of the biomass of the organism is of help for understanding impact of Phaeocystis blooms on the marine carbon cycle. Breakdown of the mucopolysaccharides, during which the carbohydrate composition of the residual fraction did not change, slowed greatly after about 15 days. Incomplete degradation was the result of release of inhibitors produced during breakdown.
Publication Name: Limnology and Oceanography
Subject: Earth sciences
ISSN: 0024-3590
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Trophic interaction in open systems: effects of predators and nutrients on stream food chains
Article Abstract:
Effects of predators and nutrients on stream food chains are discussed as related to trophic interaction in open systems. The combined effects of predators and nutrients on community organization have been tested in an open system in Sycamore Creek, a central Arizona perennial desert stream. It was not possible to conclusively determine mechanism for the increase in algal and herbivore biomass seen as a response to nutrient addition. REsults suggest adjustment of consumer dispersal rates in response to predators and resources can influence biomass at multiple trophic levels
Publication Name: Limnology and Oceanography
Subject: Earth sciences
ISSN: 0024-3590
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Constant connectance in community food webs. Trophic interactions in temperate lake ecosystems: a test of food chain theory
- Abstracts: Vertical distribution of a colonial ascidian on a coral reef: the roles of larval dispersal and life history variation
- Abstracts: Fibrillar polysaccharides in marine macromolecular organic matter as imaged by atomic force microscopy and transmission electron microscopy
- Abstracts: Biogeochemical cycling of PCBs in lakes of variable trophic status: a paired-lake experiment. Resource competition in a discrete environment: why are plankton distributions paradoxical?
- Abstracts: Mesozooplankton influences on the microbial food web: direct and indirect trophic interactions in the oligotrophic open ocean