Assessment of nutritional subsidies to freshwater mussels using a multiple natural abundance isotope approach

Autor:	James E. Bauer, G. Thomas Watters, Amy M. Weber
Rok vydání:	2017
Předmět:	0106 biological sciences chemistry.chemical_classification Biomass (ecology) δ13C Ecology 010604 marine biology & hydrobiology Mussel δ15N Aquatic Science Biology 010603 evolutionary biology 01 natural sciences Zooplankton chemistry Benthic zone Phytoplankton Organic matter
Zdroj:	Freshwater Biology. 62:615-629
ISSN:	1365-2427 0046-5070
DOI:	10.1111/fwb.12890
Popis:	Summary Freshwater mussels are a particularly imperilled group of aquatic organisms. To date, there is limited understanding of their dietary and nutritional subsidies, including those from both autochthonous (aquatic) and allochthonous (terrestrial) sources. The aim of this study was to evaluate the relative contributions of potential nutritional resources to mussel biomass using a Bayesian mixing model (MixSIAR) for (i) bulk suspended versus benthic organic matter (OM) pools, (ii) general autochthonous versus allochthonous OM sources and (iii) specific individual OM sources. Nutritional subsidies of five species of freshwater mussels were assessed using natural abundance stable isotopes (δ13C, δ15N, δ2H) and natural radiocarbon (Δ14C). The ranges for each of the four isotopes were similar across all species and sampling dates, and mussel δ13C and δ15N values were similar to those measured in previous studies. Despite relatively low variability in this study, species and temporal differences in mussel δ15N, δ2H and Δ14C values were generally significant (P
Databáze:	OpenAIRE
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