By Michael J.S. Tevesz, Peter L. McCall
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Extra info for Biotic Interactions in Recent and Fossil Benthic Communities
Monogr. 41:351-389. , 1975, Animal Population Ecology, Academic Press, New York. , 1979a, Annual food intake by plaice and flounder in a tidal flat area in the Dutch Wadden Sea, with special reference to consumption of regenerating parts of macrobenthic prey, Neth. J. Sea Res. 13:117-153. , 1979b, Secondary production by tail regeneration in a tidal flat population of lugworms (Arenicola marina), cropped by flatfish, Neth. /. Sea Res. 13:362-393. Eckman, J. , 1979, Small-scale patterns and processes in a soft-substratum, intertidal community, J.
The pattern may not, however, be the result of competition mediated by sediment change, but rather the result of predation by infaunal adults or more likely the result of both processes. One might anticipate that browsing predators would give rise to large numbers of regenerating individuals that would be easily recognized in static samples. However, one must know both the number of regenerating individuals found in the static samples and the rate at which such individuals regenerate that body part to calculate how frequent tissue loss is and thus how important browsing predators may be.
Again the magnitude of the effect will depend upon their activities and densities. However, the effects of burrowing predators may be quite different from those of weasel predators if they disturb the sediment layers significantly while burrowing. For some species, such as large naticid gastropods, this is important (see Rhoads, 1967; Wiltse, 1980). Such sediment modification may displace portions of tubes, bury some organisms, disrupt and fill organisms' connections to the surface, etc. As Levinton (1977) suggested, such sediment disruptions force the infaunal individual to reorient itself in the sediment, interrupting the normal activities of the individual.
Biotic Interactions in Recent and Fossil Benthic Communities by Michael J.S. Tevesz, Peter L. McCall