NDLI: δ15N examination of the Lindeman-Hutchinson-Peters theory of increasin omnivory with trophic height in aquatic foodwebs

Content Provider	Springer Nature Link
Author	France, Robert L.
Copyright Year	1997
Abstract	The advent of stable nitrogen isotope analysis in ecological research has at last enabled precise identification of trophic position and omnivory due to the differential enrichment of15N over14N with progressive assimilation up the foodweb. I compiled literature data on δ15N values in freshwater and marine foodwebs to search for qeneral patterns in omnivory, specifically the supposition originally proposed by Lindeman (1942) and most recently advanced by Peters (1977), that omnivory should increase with trophic height or position. Omnivory, measured as average intraspecific variability in δ15N, was indeed found to increase with trophic height, such that species at the top of foodwebs were comprised of animals relying, on average, on energy originating from a mixture of different trophic categories.
Starting Page	121
Ending Page	125
Page Count	5
File Format	PDF
ISSN	00345466
Journal	Population Ecology
Volume Number	39
Issue Number	2
e-ISSN	14375613
Language	English
Publisher	Springer-Verlag
Publisher Date	1997-01-01
Publisher Place	Tokyo
Access Restriction	Subscribed
Subject Keyword	foodwebs omnivory δ15N variability trophic position Ecology Zoology Plant Sciences Evolutionary Biology Behavioural Sciences Forestry
Content Type	Text
Resource Type	Article
Subject	Agricultural and Biological Sciences

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δ15N examination of the Lindeman-Hutchinson-Peters theory of increasin omnivory with trophic height in aquatic foodwebs