PMID: 11914157Mar 27, 2002Paper

Salmon-derived nitrogen in terrestrial invertebrates from coniferous forests of the Pacific Northwest

BMC Ecology
Morgan D Hocking, Thomas E Reimchen

Abstract

Bi-directional flow of nutrients between marine and terrestrial ecosystems can provide essential resources that structure communities in transitional habitats. On the Pacific coast of North America, anadromous salmon (Oncorhynchus spp.) constitute a dominant nutrient subsidy to aquatic habitats and riparian vegetation, although the contribution to terrestrial habitats is not well established. We use a dual isotope approach of delta15N and delta13C to test for the contribution of salmon nutrients to multiple trophic levels of litter-based terrestrial invertebrates below and above waterfalls that act as a barrier to salmon migration on two watersheds in coastal British Columbia. Invertebrates varied predictably in delta15N with enrichment of 3-8 per thousand below the falls compared with above the falls in all trophic groups on both watersheds. We observed increasing delta15N levels in our invertebrate groups with increasing consumption of dietary protein. Invertebrates varied in delta13C but did not always vary predictably with trophic level or habitat. From 19.4 to 71.5% of invertebrate total nitrogen was originally derived from salmon depending on taxa, watershed, and degree of fractionation from the source. Enrichment of delt...Continue Reading

References

Mar 10, 2001·Trends in Plant Science·R D Evans

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Citations

Jul 11, 2006·Ecological Applications : a Publication of the Ecological Society of America·Joseph E Merz, Peter B Moyle
Jun 1, 2007·Ecology·Laura B HannanJohn F Weishampel
Mar 12, 2020·Proceedings. Biological Sciences·Debora S ObristJohn D Reynolds
Jan 4, 2013·Proceedings. Biological Sciences·Morgan D HockingThomas E Reimchen
Feb 18, 2011·Proceedings. Biological Sciences·Rachel D Field, John D Reynolds

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