کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8363437 | 1542583 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reliability of isotopic fractionation (Î15N, Î13C) for the delimitation of trophic levels of oribatid mites: Diet strongly affects Î13C but not Î15N
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش خاک شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Reliability of isotopic fractionation (Î15N, Î13C) for the delimitation of trophic levels of oribatid mites: Diet strongly affects Î13C but not Î15N Reliability of isotopic fractionation (Î15N, Î13C) for the delimitation of trophic levels of oribatid mites: Diet strongly affects Î13C but not Î15N](/preview/png/8363437.png)
چکیده انگلیسی
Stable isotope analysis has become an analytical tool of central importance in trophic ecology. The actual degree of isotopic fractionation, however, remains a black-box in most studies. Hence, mean values for trophic enrichment from other taxa are commonly used to delimitate trophic levels. On the other hand, resource composition as well as consumer physiology both influence fractionation patterns. Especially in soil food webs, high variability of isotopic fractionation has been found for both 15N and 13C. Here, we investigate effects of diet on trophic enrichment in a no-choice feeding experiment with the oribatid mite model species Archegozetes longisetosus and a set of fungal, animal, algal and plant resources (seeds and vegetative tissues). We found consistent trophic enrichment for nitrogen irrespective of diet (Î15N = 3.9â°), but no reliable fractionation for carbon being negative for fungi (Î13C = â1.8â°), neutral for algae, and positive for the remaining plant and animal resources (Î13C = 2.3â°). The results suggest that δ15N is a reliable marker for delimiting the trophic level of oribatid mites and presumably other soil detritivores, while understanding δ13C signals needs a priori knowledge about isotopic fractionation with respect to consumed resources.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Biology and Biochemistry - Volume 101, October 2016, Pages 124-129
Journal: Soil Biology and Biochemistry - Volume 101, October 2016, Pages 124-129
نویسندگان
Michael Heethoff, Stefan Scheu,