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Bioturbation as a mechanism for setting and maintaining levels of diversity in subtidal macrobenthic communities Widdicombe, S.; Austen, M.C.; Kendall, M.A.; Warwick, R.M.; Jones, M.B. (2000). Bioturbation as a mechanism for setting and maintaining levels of diversity in subtidal macrobenthic communities, in: Jones, M.B. et al. Island, Ocean and Deep-Sea Biology: Proceedings of the 34th European Marine Biology Symposium, held in Ponta Delgada (Azores), Portugal, 13-17 September 1999. Developments in Hydrobiology, 152: pp. 369-377. https://dx.doi.org/10.1007/978-94-017-1982-7_34 In: Jones, M.B. et al. (2000). Island, ocean and deep-sea biology: Proceedings of the 34th European Marine Biology Symposium, held in Ponta Delgada (Azores), Portugal, 13-17 September 1999. European Marine Biology Symposia, 34. Developments in Hydrobiology, 152. ISBN 978-0-7923-6846-5; e-ISBN 978-94-017-1982-7. XII, 391 pp. https://dx.doi.org/10.1007/978-94-017-1982-7, meer In: European Marine Biology Symposia., meer Is gerelateerd aan: Widdicombe, S.; Austen, M.C.; Kendall, M.A.; Warwick, R.M.; Jones, M.B. (2000). Bioturbation as a mechanism for setting and maintaining levels of diversity in subtidal macrobenthic communities. Hydrobiologia 440(1-3): 369-377. https://dx.doi.org/10.1023/A:1004120621842, meer

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Documenttype: Congresbijdrage

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Trefwoorden

Sediment mixing > Bioturbation Species diversity Marien/Kust

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Auteurs		Top
Widdicombe, S., meer Austen, M.C., meer Kendall, M.A., meer	Warwick, R.M., meer Jones, M.B.

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Abstract

Over 2 years, experiments were conducted to compare the effects of sediment disturbance by different bioturbating, macrofaunal organisms on the diversity and structure of the associated infaunal community. The four species investigated were the bivalves Nuculoma tenuis (Montagu, 1808) and Abra alba (Wood, 1802), the heart urchin Brissopsis lyrifera (Forbes, 1841), and the burrowing decapod Calocaris macandreae (Bell, 1846). These organisms were chosen to allow assessment of the effects of contrasting feeding activities and body sizes of the bioturbating species on the diversity of the macrobenthic communities. Bioturbation by the sub-surface deposit feeders N. tenuis and B. lyrifera promoted higher levels of α and β diversity in treatments exposed to intermediate levels of disturbance. Whilst no such `intermediate response' was demonstrated for A. alba or C. macandreae, it was evident that changes in the associated fauna were influenced by the feeding type of the bioturbating organism responsible. It was also shown that different elements of the associated community responded differently to biotic disturbance. The results indicate that the variability in density and distribution of such bioturbators are important factors in structuring infaunal communities, and in setting and maintaining levels of diversity in apparently homogeneous areas.

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