Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

Effects of acid washing on stable isotope ratios of C and N in penaeid shrimp and seagrass: Implications for food-web studies using multiple stable isotopes

Bunn, S.E., Loneragan, N.R. and Kempster, M.A. (1995) Effects of acid washing on stable isotope ratios of C and N in penaeid shrimp and seagrass: Implications for food-web studies using multiple stable isotopes. Limnology and Oceanography, 40 (3). pp. 622-625.

[img]
Preview
PDF - Published Version
Download (684kB)
Free to read: http://www.aslo.org/lo/toc/vol_40/issue_3/0622.pdf
*No subscription required

Abstract

We investigated the effects of acid washing on the carbon and nitrogen composition and stable isotope ratios of C and N in shrimp (Metapenaeus spp.) and seagrass (Enhalus acoroides). Acid washing did not affect the mean 6’ 3C ratios for juvenile Metapenaeus moyebi and resulted in only an ecologically insignificant change (0.3%0) in mean P3C ratios for larger Metapenaeus bennettae. In contrast, acid washing increased the mean 615N signatures of shrimp tissue (- 3G) and decreased that of seagrass (N 1.89&) to a degree that may confound the interpretation of food webs. The increase in %C and %N in both shrimp and seagrass after acid washing suggests that the changes in isotope ratios are due to loss of molecules comparatively low in C and N. Treating samples by acid washing also resulted in an increase in the variation among individuals for both 615N and 613C, which would lead to a loss of statistical power for testing differences between species, sites, or seasons.

Item Type: Journal Article
Copyright: © 1995 by the Association for the Sciences of Limnology and Oceanography, Inc
URI: http://researchrepository.murdoch.edu.au/id/eprint/12795
Item Control Page Item Control Page

Downloads

Downloads per month over past year