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Shifts in rotifer life history in response to stable isotope enrichment: testing theories of isotope effects on organismal growth
Stockholm University, Faculty of Science, Department of Environmental Science and Analytical Chemistry.
Number of Authors: 1
2017 (English)In: Royal Society Open Science, E-ISSN 2054-5703, Vol. 4, no 3, 160810Article in journal (Refereed) Published
Abstract [en]

In ecology, stable isotope labelling is commonly used for tracing material transfer in trophic interactions, nutrient budgets and biogeochemical processes. The main assumption in this approach is that the enrichment with a heavy isotope has no effect on the organism growth and metabolism. This assumption is, however, challenged by theoretical considerations and experimental studies on kinetic isotope effects in vivo. Here, I demonstrate profound changes in life histories of the rotifer Brachionus plicatilis fed N-15-enriched algae (0.4-5.0 at%); i.e. at the enrichment levels commonly used in ecological studies. These findings support theoretically predicted effects of heavy isotope enrichment on growth, metabolism and ageing in biological systems and underline the importance of accounting for such effects when using stable isotope labelling in experimental studies.

Place, publisher, year, edition, pages
2017. Vol. 4, no 3, 160810
Keyword [en]
stable isotopes, N-15-labelling, growth and life histories, longevity, isotope resonance theory, kinetic isotope effect
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:su:diva-142697DOI: 10.1098/rsos.160810ISI: 000398107700018PubMedID: 28405367OAI: oai:DiVA.org:su-142697DiVA: diva2:1093731
Available from: 2017-05-08 Created: 2017-05-08 Last updated: 2017-05-08Bibliographically approved

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