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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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Life in the fast lane: macrobenthos use temporary drifting algal habitats Salovius, S.; Nyqvist, M.; Bonsdorff, E. (2005). Life in the fast lane: macrobenthos use temporary drifting algal habitats. J. Sea Res. 53(3): 169-180. https://dx.doi.org/10.1016/j.seares.2004.05.001 In: Journal of Sea Research. Elsevier/Netherlands Institute for Sea Research: Amsterdam; Den Burg. ISSN 1385-1101; e-ISSN 1873-1414, meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 351978 [ aanvragen ]

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Trefwoorden

Algae Aquatic communities > Benthos > Zoobenthos Baltic Sea Behaviour > Migration Behaviour > Migrations Colonization Eutrophication Hydrographic features > Marine areas > Seas > Northeast atlantic > Baltic sea Migration Migration Cladophora glomerata (Linnaeus) Kützing, 1843 [WoRMS] ANE, Baltic [Marine Regions] Marien/Kust

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Auteurs		Top
Salovius, S. Nyqvist, M. Bonsdorff, E., meer

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Abstract

In coastal waters filamentous algal growths have increased due to eutrophication. At some stage, algal filaments come loose and start drifting in the water column where they become important transient resources for ambient invertebrates, before they gather at the bottom and start decaying. By field experiments, we have quantitatively studied how macrofauna temporarily utilise these filamentous algae, and whether large water depths or long distances from the shore restrict or promote the colonisation process. Further we have compared macrofauna colonisation rates to algae in the water column and to algae lying at the sediment. Our results show that macrofauna colonisation rates are fastest in late July. The colonisation of the drifting algae occurred mainly by juvenile individuals. Species colonising algae at the sea bottom partly originated from the sediment, while species colonising algae in the water column were mobile crustaceans and pelagic juvenile molluscs. Water depths exceeding 10 m restricted colonisation rates, while the distance from the shore seems to be less important as a barrier for migrating fauna from the algal belts. We conclude that drifting algae serve as important nutrient-rich temporal habitats after they have become detached and been transferred to other areas. Drifting algae also transport species and enhance the recolonisation of previously defaunated sediments, and hence function as floats for Baltic macroinvertebrates.

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