کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4397543 | 1618487 | 2007 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Isotope trophic-step fractionation of suspension-feeding species: Implications for food partitioning in coastal ecosystems
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Isotope trophic-step fractionation of suspension-feeding species: Implications for food partitioning in coastal ecosystems Isotope trophic-step fractionation of suspension-feeding species: Implications for food partitioning in coastal ecosystems](/preview/png/4397543.png)
چکیده انگلیسی
Pacific oysters (Crassostrea gigas) and blue mussels (Mytilus edulis) were reared on a microalgal (Skeletonema costatum) diet to estimate their diet-tissue isotopic fractionation (Î). We established that the diet-tissue fractionation value for stable carbon (δ13C) and stable nitrogen (δ15N) were around + 2.0 and + 3.6 for 13C and 15N, respectively. Equilibrium isotopic signatures, as well as turnovers of carbon and nitrogen in whole tissues, were approximated by exponential decay models. Half-life values in bivalves were about two times longer for carbon (around 8.5days) than for nitrogen (14.5days). We then used species-specific fractionation values to re-estimate contributions of food sources to the diets of similar suspension-feeding species, for which standard fractionation values had been assumed in previous studies. We emphasize the importance of knowing specific isotopic fractionation values to understand inter-specific trophic relationships and food webs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Experimental Marine Biology and Ecology - Volume 351, Issues 1â2, 23 November 2007, Pages 121-128
Journal: Journal of Experimental Marine Biology and Ecology - Volume 351, Issues 1â2, 23 November 2007, Pages 121-128
نویسندگان
Stanislas Dubois, Blin Jean-Louis, Bouchaud Bertrand, Sébastien Lefebvre,