کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6317019 1619190 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of relative trophic position and carbon source on selenium bioaccumulation in turtles from a coal fly-ash spill site
ترجمه فارسی عنوان
تأثیر موقعیت دهانی نسبی و منبع کربن بر ذخیره زیستی سلنیوم در لاک پشت ها از محل انفجار خاکستر ذغال سنگ
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی
Selenium (Se) is a bioaccumulative constituent of coal fly-ash that can disrupt reproduction of oviparous wildlife. In food webs, the greatest enrichment of Se occurs at the lowest trophic levels, making it readily bioavailable to higher consumers. However, subsequent enrichment at higher trophic levels is less pronounced, leading to mixed tendencies for Se to biomagnify. We used stable isotopes (15N and 13C) in claws to infer relative trophic positions and relative carbon sources, respectively, of seven turtle species near the site of a recently-remediated coal fly-ash spill. We then tested whether Se concentrations differed with relative trophic position or relative carbon source. We did not observe a strong relationship between δ15N and Se concentration. Instead, selenium concentrations decreased with increasing δ13C among species. Therefore, in an assemblage of closely-related aquatic vertebrates, relative carbon source was a better predictor of Se bioaccumulation than was relative trophic position.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 182, November 2013, Pages 45-52
نویسندگان
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