Abstract
The absence of species from kelp holdfast habitats is used to establish changes in invertebrate community structure in polluted coastal waters along the shores of North Eastern Britain. The study shows the following changes: (1) Approximately 45% of the species complement studied in clean-water habitats are missing from polluted habitats. (2) Rare species are lost and food chains are missing. (3) Dislocations of the marine food web occur: removal of parts of the primary producer to herbivore food chain; suppression of some carnivores; removal of some omnivores and selection of certain suspension feeders. (4) No new species appear in polluted communities. (5) Recombinations of resistant species compensate for the reduction in energy flow through a damaged food web by proportionally increasing the suspension-feeding pathways. (6) The ecological equilibrium of the suspension-feeding groups which are responsible for maintaining the damaged food web are in a delicate state of balance. The further loss of 1 large food chain could result in the collapse of the remaining fragments of a polluted-water invertebrate community food web.
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Communicated by T. R. Parsons, Vancouver
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Jones, D.J. Variation in the trophic structure and species composition of some invertebrate communities in polluted kelp forests in the North Sea. Marine Biology 20, 351–365 (1973). https://doi.org/10.1007/BF00354277
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DOI: https://doi.org/10.1007/BF00354277