A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Nutrient availability modifies species abundance and community structure of Fucus-associated littoral benthic fauna
Tekijät: Korpinen S, Jormalainen V, Pettay E
Kustantaja: ELSEVIER SCI LTD
Julkaisuvuosi: 2010
Journal: Marine Environmental Research
Tietokannassa oleva lehden nimi: MARINE ENVIRONMENTAL RESEARCH
Lehden akronyymi: MAR ENVIRON RES
Numero sarjassa: 3-4
Vuosikerta: 70
Numero: 3-4
Aloitussivu: 283
Lopetussivu: 292
Sivujen määrä: 10
ISSN: 0141-1136
DOI: https://doi.org/10.1016/j.marenvres.2010.05.010
Tiivistelmä
The brown alga Focus vesiculosus is a foundation species in the Baltic Sea littoral, hosting a rich faunal community. We compared the species composition and diversity of invertebrate macrofauna living on E vesiculosus between sites differing in their eutrophication status and exposure to waves at three different times during a season. We determined the size, nitrogen and phlorotannin content of the alga. The invertebrate community differed substantially between sites near fish farms and those in more pristine environment. Snails and bivalves were more abundant on the Focus stands near fish farms than on control stands, where crustaceans were more abundant. The abundance of molluscs decreased with the increasing shore exposure, while gammaridean amphipods dominated on the exposed shores. Abundance of several taxa increased during the proceeding growing season. The density of the most important herbivore of F. vesiculosus, Idotea balthica, varied 100-fold during the season being the lowest in June and the highest in August when the generation born in the summer started to feed on Fucus. Thus, the diversity and composition of Fucus-associated invertebrate fauna varies both with environmental conditions of the stand and seasonally. Although the negative effects of eutrophication on distribution and abundance of Fucus stands are well documented, a moderate increase of nutrients was found to increase the species richness of Focus-associated fauna in early summer. (C) 2010 Elsevier Ltd. All rights reserved.
The brown alga Focus vesiculosus is a foundation species in the Baltic Sea littoral, hosting a rich faunal community. We compared the species composition and diversity of invertebrate macrofauna living on E vesiculosus between sites differing in their eutrophication status and exposure to waves at three different times during a season. We determined the size, nitrogen and phlorotannin content of the alga. The invertebrate community differed substantially between sites near fish farms and those in more pristine environment. Snails and bivalves were more abundant on the Focus stands near fish farms than on control stands, where crustaceans were more abundant. The abundance of molluscs decreased with the increasing shore exposure, while gammaridean amphipods dominated on the exposed shores. Abundance of several taxa increased during the proceeding growing season. The density of the most important herbivore of F. vesiculosus, Idotea balthica, varied 100-fold during the season being the lowest in June and the highest in August when the generation born in the summer started to feed on Fucus. Thus, the diversity and composition of Fucus-associated invertebrate fauna varies both with environmental conditions of the stand and seasonally. Although the negative effects of eutrophication on distribution and abundance of Fucus stands are well documented, a moderate increase of nutrients was found to increase the species richness of Focus-associated fauna in early summer. (C) 2010 Elsevier Ltd. All rights reserved.
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