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Shifting Systems: Prerequisites for the Application of Quantitative Fatty Acid Signature Analysis in Soil Food Webs by Jakob Kühn; Kevin Tobias; Alexander Jähngen; Liliane Ruess is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Shifting Systems: Prerequisites for the Application of Quantitative Fatty Acid Signature Analysis in Soil Food Webs about?

Quantitative fatty acid signature analysis (QFASA) is widely used to investigate trophic interactions in marine ecosystems, as nutritionally important ω 3 long-chain polyunsaturated fatty acids at the food web base allow tracing of their trophic transfer in the food chain. By contrast, the basal resources in soil food webs comprise a wider array of trophic markers, including branched-chain, cyclopropane as well as several mono- and polyunsaturated fatty acids. These diverse markers allow distinguishing between the three dominant soil carbon and energy channels, the root, bacterial and fungal pathway. QFASA has not been applied yet to soil ecosystems owing to the lack of a priori data to fit the model. The present work investigates the transfer of absolute and relative trophic marker fatty acids into Collembola as dominant representatives of the soil mesofauna. Three different species were fed on a variety of single diets characteristic for the green and brown food chain. Calibration coefficients were calculated and diet estimation trials for mixed diet set-ups were performed, using a library comprising 50 different resources. However, estimation of Collembola diet was only partiall

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Author

Jakob Kühn; Kevin Tobias; Alexander Jähngen; Liliane Ruess

Publisher

The Royal Society (ISSN 0080-4622)

Published

2020

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)