Skip to Main Content
Contrasting response of stream detritivores to long-term nutrient enrichmentAuthor(s): W.F. Cross; B.R. Johnson; J.R. Wallace; A.D. Rosemond
Source: Limnol. Oceanogr., Vol. 50(6): 1730-1739
Publication Series: Miscellaneous Publication
PDF: View PDF (1.12 MB)
DescriptionWe examined growth and production responses of two dominant stream detritivores (chironomids and Tallaperla spp. stoneflies) at opposite ends of the "slow-fast" life-history continuum and with distinct feeding characteristics (i.e., consumption of fine particulate organic matter vs. leaf litter) to a 2-yr experimental nutrient enrichment of a headwater stream. Enrichment had large positive effects (-50% increase) on chironomid growth rates but no effects on those of Tallaperla spp. On an areal basis, enrichment had a large positive effect on chironomid production (-183% increase) but no detectable effect on the production of Tallaperla spp. When production data were examined on a per gram food basis, enrichment had an apparent positive effect on the production of both chironomids and Tallaperla spp. Together, these results suggest that nutrient-induced changes to organic matter quality had consistent and substantial positive effects on short-lived chironomids, but effects were limited for longer-lived stoneflies. The lack of a system-wide effect on Tallaperla spp. may have been due to nutrient-induced reductions in leaf litter quantity, despite increases in litter quality. Our results indicate that species-specific characteristics such as life span and dominant food type may be important in determining population- and community-level responses of consumers to nutrient enrichment of detritus-based aquatic ecosystems.
- You may send email to email@example.com 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.
CitationCross, W.F.; Johnson, B.R.; Wallace, J.R.; Rosemond, A.D. 2005. Contrasting response of stream detritivores to long-term nutrient enrichment. Limnol. Oceanogr., Vol. 50(6): 1730-1739
- Whole-system nutrient enrichment increases secondary production in a detritus-based ecosystem
- Filters and templates: stonefly (Plecoptera) richness in Ouachita Mountains streams, U.S.A
- Long-term resource limitation reduces insect detritivore growth in a headwater stream
XML: View XML