Effect of the snail Ilyanassa obsoleta
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- 作者：David Drolet ; Myriam A. Barbeau ; Michael R.S. Coffin ; Diana J. Hamilton
- 关键词：Corophium volutator ; Ilyanassa obsoleta ; Mudflat ; Soft-sediment environment ; Spatial pattern
- 刊名：Journal of Experimental Marine Biology and Ecology
- 出版年：2009
- 出版时间：31 January 2009
- 年：2009
- 卷：368
- 期：2
- 页码：189-195
- 全文大小：315 K
文摘
We investigated interactions between two dominant invertebrate species of intertidal soft-sediment environments of the northwest Atlantic, the mud snail Ilyanassa obsoleta and the burrowing amphipod Corophium volutator, on a mudflat of the upper Bay of Fundy, Canada. Distribution of I. obsoleta on the mudflat was highly patchy and negatively correlated with density of C. volutator. Manipulation of snail density in cages showed that I. obsoleta influences C. volutator; specifically, increasing density of snails reduced density, increased patchiness in distribution, decreased recapture rates and decreased immigration of C. volutator. Ilyanassa obsoleta seems to be affecting C. volutator through an influence on survival rate and emigration rate, although temporal variation in these effects was observed. Given that both I. obsoleta and C. volutator show a preference for tide pools, an important microhabitat on mudflats, snails might have a profound impact on C. volutator population dynamics.