Remote analysis of biological invasion and biogeochemical change

被引：190

作者：

Asner, GP

Vitousek, PM

机构：

[1] Carnegie Inst, Dept Global Ecol, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Biol Sci, Stanford, CA 94305 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2005年 / 102卷 / 12期

关键词：

Hawaii; remote sensing; tropical forest; invasive species; imaging spectroscopy;

D O I：

10.1073/pnas.0500823102

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页码：4383 / 4386

页数：4

共 33 条

[1] Rapid nutrient cycling in leaf litter from invasive plants in Hawai'i [J].