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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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Relationships between mechanical disturbance and biomass of the invasive amphipod Gammarus tigrinus within a charophyte-dominated macrophyte community Kotta, J.; Torn, K.; Reisalu, G.; Veber, T. (2014). Relationships between mechanical disturbance and biomass of the invasive amphipod Gammarus tigrinus within a charophyte-dominated macrophyte community. Mar. Ecol. (Berl.) 35(s1): 11-18. https://dx.doi.org/10.1111/maec.12073 In: Marine Ecology (Berlin). Blackwell: Berlin. ISSN 0173-9565; e-ISSN 1439-0485, meer Ook verschenen in: Wilkinson, M. (Ed.) (2014). EMBS 45: European Marine Biology Symposium, 23-27 August 2010, Herriot-Watt University, Edinburgh. European Marine Biology Symposia, 45. Marine Ecology (Berlin), 35(Suppl. 1). III, 110 pp., meer

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Beschikbaar in	Auteurs
VLIZ: Open access 266378 [ download pdf ]

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Trefwoorden

Chara aspera Willdenow, 1809 [WoRMS] Marien/Kust

Author keywords

Baltic Sea; Chara aspera ; gammarid amphipod; mechanical disturbance; non-native species; recovery

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Auteurs		Top
Kotta, J., meer Torn, K. Reisalu, G. Veber, T.

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Abstract

Disturbance may alter the resistance of communities to non-indigenous species as it frees space and removes competitively superior species. In a factorial field experiment we studied how different types of mechanical disturbance affected the biomass level of the non-indigenous amphipod Gammarus tigrinus in a brackish water charophyte community. Mechanical disturbance affected the biomass of G. tigrinus with a time lag between disturbance and response of the gammarid species. In general, all types of disturbance reduced gammarid biomasses. The effect persisted until the end of the experiment regardless of the recovery of macrophyte communities in terms of species number and biomass of benthic invertebrate and plant species. Thus, a possible cause of reduced biomass of the gammarid amphipods relates to the decreased biomass of Chara aspera and its structural changes. This indicates that the dominance of G. tigrinus in a low saline system has less to do with strong species interactions (e.g. competitive displacement) than with habitat-level processes (e.g. changes in habitat structural characteristics and food supply).

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