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Leaf-litter stoichiometry is affected by streamwater phosphorus concentrations and litter type

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journal contribution
posted on 30.01.2018, 13:32 by Erin E. Scott, Clay Prater, Eric J. Norman, Bryant C. Baker, Michelle A. Evans-White, J. Thad Scott
The stoichiometric ratios of organisms and their food resources can influence C and nutrient dynamics in aquatic ecosystems. Several investigators have quantified linkages between nutrient enrichment and consumer stoichiometry for stream detritivores, but very few have systematically quantified the effect of P enrichment on leaf-litter stoichiometry. Here, we examine the potential stoichiometric changes of 2 species of leaf litter subjected to varying levels of P enrichment in laboratory microcosms and mixed species across a natural P gradient of streams in the Ozark Highlands Region, Arkansas, USA. Leaf-litter %P content increased and C:P ratios decreased with increasing levels of P enrichment and with increasing lability of the leaf species. In the laboratory study, C:P of maple and oak leaves in the control treatment was ,2500, whereas this ratio decreased to 500 and 1000 in the high-P treatments, respectively. Total P (TP) was inversely related to leaf-litter C:P along the natural P gradient of streams in the Ozarks. Our results add to the growing body of information on the potential bottom-up effects of anthropogenic nutrient loading in streams and the influence of water-column nutrients and leaf quality on this response.

Funding

Funding for this research was provided by a grant from the National Science Foundation, Division of Environmental Biology (DEB-1020722).

History

School

  • Social Sciences

Department

  • Geography and Environment

Published in

Freshwater Science

Volume

32

Issue

3

Pages

753 - 761

Citation

SCOTT, E.E. ...et al., 2013. Leaf-litter stoichiometry is affected by streamwater phosphorus concentrations and litter type. Freshwater Science, 32(3), pp. 753-761.

Publisher

© The Society for Freshwater Science

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2013

Notes

This paper was published in the journal Freshwater Science and the definitive published version is available at https://doi.org/10.1899/12-215.1

ISSN

2161-9549

eISSN

2161-9565

Language

en