Abstract
Predation has been demonstrated to be of fundamental importance in structuring benthic communities in the intertidal zone. The aim of the present investigation was to elucidate some of the effects of predation on structuring communities in unvegetated subtidal sediments. Field manipulative cage experiments were performed on sediment in the inner part of the Oslofjord (Norway), where the species composition was typical for a moderately organically enriched sediment. Sediment from this area was transferred to an area not suspected a priori to be seriously affected by organic pollution, and the effect of predation on the fauna was evaluated. Predation effects were not observed in the Oslofjord experiments partially because of extensive obstruction of recruitment to the sediment by settlement ofPolydora antennata on the cage; however, further experiments are in progress in this area. No such settling was observed in the unpolluted area. Here 63 taxonomic groups were identified, 57 in the control and 50 in the cages; 43 taxonomic groups were found in both the cage and the control. The total number of individuals was significantly higher in the cage (4779) than in the control (2849). The fauna recruited to the sediment in the cage responded to decreased predation by macropredators by a significant reduction in diversity. Of the 10 most abundant groups 3 (Tellinacea, Syllidae andPholoë minuta) were significantly more abundant in the cage than in the control; 3 others (Prionospio malmgreni, Microphthalmus abberans and Paraonidea) were significantly more abundant in the control. It is concluded that in an unpolluted area predation is an important factor in controlling numbers of at least some of the most abundant species. However, the effect of predation does not seem to be of the same importance in the subtidal as has previously been recognized for unvegetated intertidal mudflats.
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Literature Cited
Arntz, W. E., 1977. Results and problems of an “unsuccessful ” benthos cage predation experiment (Western Baltic) In: Biology of benthic organisms. Ed. by B. F. Keegan, P. O. Ceidigh & P. J. S. Boaden. Pergamon Press, Oxford, 31–44.
Blegvad, H., 1927. Om fiskenes konsum av bunndyr. Et forsøg med oppvekst af bunndyr i kasser. — Naturen51, 22–29.
Commito, J. H., 1976. Predation, competition, life-history strategies, and the regulation of estuarine softbottom community structure. Ph. D. Thesis, Duke Univ., Durham, 201 pp.
Connell, J. H., 1961a. Effects of competition, predation byThais lapillus, and other factors on natural populations of the barnacleBalanus balanoides. — Ecol. Monogr.31, 61–104.
Connell, J. H., 1961b. The influence of interspecific competition and other factors on the distribution of the barnacleChathamalus stellatus. — Ecology42, 701–723.
Connell, J. H., 1972. Community interactions on marine rocky intertidal shores. — A. Rev. Ecol. Syst.3, 169–192.
Menge, B. A. & Sutherland, J. P., 1976. Species diversity gradients: Synthesis of the role of predation, competition and temporal heterogeneity. — Am. Nat.110, 351–369.
Muus, K., 1973. Settling, growth and mortality of young bivalves in Øresund. — Ophelia12, 79–116.
Naqvi, S. M. Z., 1968. Effects of predation on infauna invertebrates of Alligator Harbor, Florida. — Gulf Res. Rep.2, 313–321.
Peterson, C. H., 1979a. The importance of predation and competition in organizing the intertidal epifauna communities of Barnegat Inlet, New Jersey. — Oecologia39, 1–24.
Peterson, C. H., 1979b. Predation, competitive exclusion, and diversity in the soft-sediment benthic communities of estuaries and lagoons. In: Ecological processes in coastal and marine systems. Ed. by R. J. Levingstone. Plenum Press, New York. (In press.)
Reise, K., 1977a. Predator exclusion experiments in an intertidal mud flat. — Helgoländer wiss. Meeresunters.30, 263–271.
Reise, K., 1977b. Predation pressure and community structure of an intertidal soft-bottom fauna. In: Biology of benthic organisms. Ed. by B. F. Keegan, P. O. Ceidigh & P. J. S. Boaden. Pergamon Press, Oxford, 513–519.
Reise, K., 1978. Experiments on epibenthic predation in the Wadden Sea. — Helgoländer wiss. Meeresunters.31, 55–101.
Schram, T. A., 1968. Studies on the meroplankton in the inner Oslofjord I. Composition of the plankton at Nakkholmen during a whole year. — Ophelia5, 221–243.
Segerstråle, S. G., 1978. The negative correlation between the abundances of the amphipodPontoporeia and the bivalveMacoma in Baltic waters, and the factors involved. — Ann. zool. Fenn.15, 143–145.
Virnstein, R. W., 1977. The importance of predation by crabs and fish on benthic infauna in Chesapeake bay. — Ecology58, 1199–1217.
Virnstein, R. W., 1979. Predation on estuarine infauna: Response patterns of component species. — Estuaries2, 69–86.
Young, D. K. & Young, M. W., 1978. Regulation of species densities of seagrass-associated macrobenthos: Evidence from field experiments in the Indian River estuary, Florida. — J. mar. Res.36, 569–593.
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Berge, J.A. Methods for biological monitoring: Biological interactions in communities of subtidal sediments. Helgolander Meeresunters 33, 495–506 (1980). https://doi.org/10.1007/BF02414774
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DOI: https://doi.org/10.1007/BF02414774