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Proc Natl Acad Sci U S A. 2005 Mar 22;102(12):4383-6. Epub 2005 Mar 10.

Remote analysis of biological invasion and biogeochemical change.

Author information

  • 1Department of Global Ecology, Carnegie Institution, 260 Panama Street, Stanford, CA 94305, USA. gpa@stanford.edu


We used airborne imaging spectroscopy and photon transport modeling to determine how biological invasion altered the chemistry of forest canopies across a Hawaiian montane rain forest landscape. The nitrogen-fixing tree Myrica faya doubled canopy nitrogen concentrations and water content as it replaced native forest, whereas the understory herb Hedychium gardnerianum reduced nitrogen concentrations in the forest overstory and substantially increased aboveground water content. This remote sensing approach indicates the geographic extent, intensity, and biogeochemical impacts of two distinct invaders; its wider application could enhance the role of remote sensing in ecosystem analysis and management.

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