Depth-related effects on a meiofaunal community dwelling in the periphyton of a mesotrophic lake

Kreuzinger B, Schroeder F, Majdi N, Traunspurger W (2015)
PLoS One 10(9): e0137793.

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Abstract / Bemerkung
Periphyton is a complex assemblage of micro- and meiofauna embedded in the organic matrix that coats most submerged substrate in the littoral of lakes. The aim of this study was to better understand the consequences of depth-level fluctuation on a periphytic community. The effects of light and wave disturbance on the development of littoral periphyton were evaluated in Lake Erken (Sweden) using an experimental design that combined in situ shading with periphyton depth transfers. Free-living nematodes were a major contributor to the meiofaunal community. Their species composition was therefore used as a proxy to distinguish the contributions of light- and wave-related effects. The periphyton layer was much thicker at a depth of 30 cm than at 200 cm, as indicated by differences in the amounts of organic and phototrophic biomass and meiofaunal and nematode densities. A reduction of the depth-level of periphyton via a transfer from a deep to a shallow location induced rapid positive responses by its algal, meiofaunal, and nematode communities. The slower and weaker negative responses to the reverse transfer were attributed to the potentially higher resilience of periphytic communities to increases in the water level. In the shallow littoral of the lake, shading magnified the effects of phototrophic biomass erosion by waves, as the increased exposure to wave shear stress was not compensated for by an increase in photosynthesis. This finding suggests that benthic primary production will be strongly impeded in the shallow littoral zones of lakes artificially shaded by construction or embankments. However, regardless of the light constraints, an increased exposure to wave action had a generally positive short-term effect on meiofaunal density, by favoring the predominance of species able to anchor themselves to the substrate, especially the Chromadorid nematode Punctodora ratzeburgensis.
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Zeitschriftentitel
PLoS One
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10
Ausgabe
9
Art.-Nr.
e0137793
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Article Processing Charge funded by the Deutsche Forschungsgemeinschaft and the Open Access Publication Fund of Bielefeld University.
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Kreuzinger B, Schroeder F, Majdi N, Traunspurger W. Depth-related effects on a meiofaunal community dwelling in the periphyton of a mesotrophic lake. PLoS One. 2015;10(9): e0137793.
Kreuzinger, B., Schroeder, F., Majdi, N., & Traunspurger, W. (2015). Depth-related effects on a meiofaunal community dwelling in the periphyton of a mesotrophic lake. PLoS One, 10(9), e0137793. doi:10.1371/journal.pone.0137793
Kreuzinger, B., Schroeder, F., Majdi, N., and Traunspurger, W. (2015). Depth-related effects on a meiofaunal community dwelling in the periphyton of a mesotrophic lake. PLoS One 10:e0137793.
Kreuzinger, B., et al., 2015. Depth-related effects on a meiofaunal community dwelling in the periphyton of a mesotrophic lake. PLoS One, 10(9): e0137793.
B. Kreuzinger, et al., “Depth-related effects on a meiofaunal community dwelling in the periphyton of a mesotrophic lake”, PLoS One, vol. 10, 2015, : e0137793.
Kreuzinger, B., Schroeder, F., Majdi, N., Traunspurger, W.: Depth-related effects on a meiofaunal community dwelling in the periphyton of a mesotrophic lake. PLoS One. 10, : e0137793 (2015).
Kreuzinger, Bianca, Schroeder, Fabian, Majdi, N., and Traunspurger, Walter. “Depth-related effects on a meiofaunal community dwelling in the periphyton of a mesotrophic lake”. PLoS One 10.9 (2015): e0137793.
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