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    Author(s): JAMES G. MARCH; JONATHAN P. BENSTEAD; CATHERINE M. PRINGLE; FREDERICK N. SCATENA
    Date: 2003
    Source: November 2003 / Vol. 53 No. 11 • BioScience
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (728 B)

    Description

    The combination of human population growth, increased water usage, and limited groundwater resources often leads to extensive damming of rivers and streams on tropical islands. Ecological effects of dams on tropical islands can be dramatic, because the vast majority of native stream faunas (fishes, shrimps, and snails) migrate between freshwater and saltwater during their lives. Dams and associated water withdrawals have been shown to extirpate native faunas from upstream reaches and increase mortality of downstream-drifting larvae. A better understanding of the effects of dams and the behavior of tropical island stream faunas is providing insights into how managers can mitigate the negative effects of existing dams and develop alternatives to dam construction while still providing freshwater for human use.We review the ecological effects of dams on tropical island streams, explore means to mitigate some of these effects, describe alternatives to dam construction, and recommend research priorities.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    MARCH,JAMES G.; BENSTEAD, JONATHAN P.; PRINGLE, CATHERINE M.; SCATENA, FREDERICK N. 2003. Damming Tropical Island Streams: Problems, Solutions, and Alternatives. November 2003 / Vol. 53 No. 11 • BioScience

    Keywords

    conservation, diadromy, impoundments, insular, lotic

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