文章基本信息

标题：Effect of physical disturbance on the soft sediment benthic macrophyte and invertebrate community in the northern Baltic sea
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作者：Kristjan herkül ; Jonne Kotta ; Merli Pärnoja 等
期刊名称：Boreal Environment Research
印刷版ISSN：1239-6095
出版年度：2011
卷号：16
页码：209-219
语种：English
出版社：Finnish Limnological Society
摘要：Strong storms and ice scour are the most severe physical disturbances in the shallow water areas of the northern Baltic Sea. We studied experimentally the effects a physical distur- bance — such as the removal of the surface sediment layer, vegetation, and benthic inver- tebrates and the timing of this disturbance (spring, summer) — had on the development of soft bottom macrophyte and invertebrate communities in a shallow bay. Disturbance had an immediate effect on the community in spring but not in summer. The lack of significant immediate effects in summer was attributed to a drifting algal mat that quickly introduced most of the local species to the newly established experimental plots. The springtime dis- turbance reduced the species richness and total biomass of phytobenthos in summer; the effect, however, was not detectable by autumn. Disturbance in spring decreased the total abundance and biomass of zoobenthos in autumn but not in summer. A summertime distur-bance had no effect on the autumn benthic communities.