Format

Send to

Choose Destination
See comment in PubMed Commons below
Science. 2006 Aug 11;313(5788):833-6.

Loss of a harvested fish species disrupts carbon flow in a diverse tropical river.

Author information

1
Department of Zoology and Physiology, University of Wyoming, Laramie, WY 82071, USA. brad.taylor@dartmouth.edu

Abstract

Harvesting threatens many vertebrate species, yet few whole-system manipulations have been conducted to predict the consequences of vertebrate losses on ecosystem function. Here, we show that a harvested migratory detrital-feeding fish (Prochilodontidae: Prochilodus mariae) modulates carbon flow and ecosystem metabolism. Natural declines in and experimental removal of Prochilodus decreased downstream transport of organic carbon and increased primary production and respiration. Thus, besides its economic value, Prochilodus is a critical ecological component of South American rivers. Lack of functional redundancy for this species highlights the importance of individual species and, contrary to theory, suggests that losing one species from lower trophic levels can affect ecosystem functioning even in species-rich ecosystems.

PMID:
16902137
DOI:
10.1126/science.1128223
[Indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire
    Loading ...
    Support Center