Taxon composition and food-web structure in a morphometric gradient of Baltic Sea land-uplift bays
2012 (English)In: Boreal environment research, ISSN 1239-6095, Vol. 17, no 1, 1-20 p.Article in journal (Refereed) Published
Shallow Baltic Sea bays undergo a process of morphometric isolation from the sea due to post-glacial land uplift. Recent studies have documented that both flora and fauna communities change along this gradient. Changes in taxon composition may in turn alter feeding ecology and trophic relationships. In addition, the relative importance of carbon from terrestrial sources may increase with bay isolation. In accordance with previous studies, we found a change in the community composition of both flora and fauna with bay isolation. Results of stable isotope analysis (δ13C, δ15N) suggested that epiphytes and periphyton are the major carbon sources for most benthic primary consumers, but that their importance in relation to angiosperms and charophytes decreased with bay isolation. The results also indicated that filter feeders utilize terrestrially derived carbon, but its importance could not be critically related to bay isolation. Trophic positions of the consumers were similar across the bay isolation gradient.
Place, publisher, year, edition, pages
2012. Vol. 17, no 1, 1-20 p.
IdentifiersURN: urn:nbn:se:su:diva-44330ISI: 000301010200001OAI: oai:DiVA.org:su-44330DiVA: diva2:361013