Copyright 2001 Long Term Ecological Research Network - See our standard User Agreement and Disclaimer Page. This material is based upon work supported by the National Science Foundation under Cooperative Agreements DEB-0620910, DEB-0218039, DEB-0080538, DEB-9705814, DEB-9411973, BSR-8811902. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
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