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The effect of grazing by the detritivore Orchestia grillus on Spartina litter and its associated microbial community (1977)

Lopez, G. R. ; Levinton, J. S. ; Slobodkin, L. B.

Springer

Oecologia 30 (1977), S. 111-127

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ISSN: 1432-1939

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Summary Orchestia grillus efficiently feeds upon microorganisms attached to ingested Spartina alterniflora litter, but does not digest litter itself. Microorganisms respond to Orchestia grazing with increased metabolic activity, reflected in accelerated decomposition of the nitrogen fraction of litter and increased microbial biomass. Increased microbial activity may be partly a function of ammonia excretion and higher diffusion rate due to animal movement, but mainly it is a direct response to grazing. Microbial biomass increases with grazing because the pool of available nitrogen becomes larger. A model postulating interactions between Orchestria, Spartina litter and attached microorganisms is presented.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00345415

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