Skip to Main Content
Contrasting food web linkages for the grazing pathway in three temperate forested streams using 15N as a tracerAuthor(s): J.L. Tank; P.J. Mulholland; J.L. Meyer; W.B. Bowden; J.R. Webster; B.J. Peterson
Source: Verh. Internat. Verein. Limnol., Vol. 27: 2832-2835
Publication Series: Miscellaneous Publication
PDF: View PDF (725 KB)
DescriptionNitrogen is a critical element controlling the productivity and dynamics of stream ecosystems and many streams are limited by the supply of biologically available nitrogen (e.g. Grimm & Fisher 1986, Lohman et al. 1991). We are learning more about the fate of inorganic nitrogen entering streams through 15N tracer additions (Peterson et al. 1997). The Lotic Intersite Nitrogen eXperiment (LINX) is studying the uptake, cycling, and fate of 15N-NH4 in the stream food web of 10 streams draining different biomes. Using the 15N tracer method and data from three sites in the study, w can differentiate patterns in the cycling of nitrogen through the grazing pathway (N from the epilithon to grazing macroinvertebrates) for three temperate forested streams. Here, we quantify the relationship between the dominant grazer and its proposed food resource, epilithon, by comparing 15N levels of grazers with those of the epilithon, as well as the biomass, nitrogen content, and chlorophyll a standing stocks of the epilithon in three streams.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationTank, J.L.; Mulholland, P.J.; Meyer, J.L.; Bowden, W.B.; Webster, J.R.; Peterson, B.J. 2000. Contrasting food web linkages for the grazing pathway in three temperate forested streams using 15N as a tracer. Verh. Internat. Verein. Limnol., Vol. 27: 2832-2835
- Food resources of stream macroinvertebrates determined by natural-abundance stable C and N isotopes and a 15N tracer addition
- You are not always what we think you eat: selective assimilation across multiple whole-stream isotopic tracer studies
- Quantifying the production of dissolved organic nitrogen in headwater streams using 15N tracer additions
XML: View XML