کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4400356 1618566 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stable isotope fractionation of fatty acids of Daphnia fed laboratory cultures of microalgae
ترجمه فارسی عنوان
تجزیه ایزوتوپ پایدار اسیدهای چرب تغذیه کشت های آزمایشگاه های میکروالگا شده با Daphnia
کلمات کلیدی
اسیدهای چرب؛ تجزیه و تحلیل ایزوتوپ های با ترکیب خاص ؛ تجزیه ایزوتوپ پایدار؛ شبکه های غذایی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
چکیده انگلیسی


• We did compound specific isotope analyses of fatty acids (CSIA-FA) in laboratory.
• CSIA-FA was done for Daphnia fed batch cultures of Chlorella and Cryptomonas.
• All essential polyunsaturated FA in Daphnia were lighter than those in microalgae.
• There was no constant value of isotope fractionation of FA in Daphnia.
• The results contradicted common way of interpretation of CSIA-FA in field studies.

We tested a comparatively new method of tracing of natural food webs, compound-specific isotope analysis (CSIA) of fatty acids (FA), using laboratory culture of Daphnia galeata fed Chlorella vulgaris and Cryptomonas sp. In general, Daphnia had significantly lighter carbon stable isotope composition of most fatty acids, including essential, than those of their food, microalgae. Thus, our results did not support the pivotal premise of the FA-CSIA application for food web analysis, i.e., transmitting the isotope ‘signal’ of essential FAs to consumers from their food without any modification. Moreover, the values of isotope fractionation of particular FAs in the consumer relative to its food were not constant, but varied from 1.35‰ to 7.04‰. The different isotope fractionation (depletion) values of diverse FAs in consumer were probably caused by different processes of their synthesis, catabolism and assimilation. More work is evidently to be done for correct interpretation of results of FA-CSIA during field studies for tracing of natural food webs.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Limnologica - Ecology and Management of Inland Waters - Volume 56, January 2016, Pages 23–29
نویسندگان
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