A relative contribution of carbon from green tide algae Cladophora glomerata and Ulva intestinalis in the coastal food webs in the Neva Estuary (Baltic Sea).

Autor: Golubkov SM; Zoological Institute of Russian Academy of Sciences, Universitetskaya emb. 1, Saint-Petersburg 199034, Russian Federation. Electronic address: golubkov@zin.ru., Berezina NA; Zoological Institute of Russian Academy of Sciences, Universitetskaya emb. 1, Saint-Petersburg 199034, Russian Federation., Gubelit YI; Zoological Institute of Russian Academy of Sciences, Universitetskaya emb. 1, Saint-Petersburg 199034, Russian Federation., Demchuk AS; Zoological Institute of Russian Academy of Sciences, Universitetskaya emb. 1, Saint-Petersburg 199034, Russian Federation., Golubkov MS; Zoological Institute of Russian Academy of Sciences, Universitetskaya emb. 1, Saint-Petersburg 199034, Russian Federation., Tiunov AV; A.N. Severtsov Institute of Ecology and Evolution of Russian Academy of Sciences, 33 Leninsky prospekt, 119071 Moscow, Russian Federation.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2018 Jan; Vol. 126, pp. 43-50. Date of Electronic Publication: 2017 Nov 04.
DOI: 10.1016/j.marpolbul.2017.10.032
Abstrakt: We analyzed stable isotope composition of carbon and nitrogen of suspended organic matter (seston) and tissues of macroalgae, macroinvertebrates and fish from the coastal area of the highly eutrophic Neva Estuary to test a hypothesis that organic carbon of macroalgae Cladophora glomerata and Ulva intestinalis produced during green tides may be among primary sources supporting coastal food webs. The Stable Isotope Bayesian mixing model (SIAR) showed that consumers poorly use organic carbon produced by macroalgae. According to the results of SIAR modeling, benthic macroinvertebrates and fish mostly rely on pelagic derived carbon as a basal resource for their production. Only some species of macroinvertebrates consumed macroalgae. Fish used this resource directly consuming zooplankton or indirectly via benthic macroinvertebrates. This was consistent with the results of the gut content analysis, which revealed a high proportion of zooplankton in the guts of non-predatory fish.
(Copyright © 2017. Published by Elsevier Ltd.)
Databáze: MEDLINE
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