The community structure of psammophile (interstitial) ciliates was studied in three areas of the silty sand intertidal zone of the White Sea, the background (a natural community formed under conditions of high siltation) and two experimental areas (the first, unsilted sandy “island” formed in the autumn of 2006, was originally uninhabited and the second was a similar island formed in the autumn of 2008). The experimental biotopes were more aerated and less silted than the background. The principle difference of experimental sites was the duration of their existence. Despite the remaining biotope differences between the background and first experimental site after 3 years of the experiment, the communities were of the same structural pattern. The second experimental biotope, which existing for a short time period, had considerable biotopic similarity to the first experimental one, but significantly differed from it and from the background in the course of succession and structural pattern of the formed community. It was shown that quantitatively and qualitatively (by density and number of species) the community of ciliates formed rather quickly during the first seasonal cycle of development in the new created biotope. However, one annual cycle is not sufficient for the formation of a community species structure, including the species ratio reflecting its niche structure.
Russian Journal of Marine Biology – Springer Journals
Published: Jul 8, 2011
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