Vegetation-climate interactions among native and invasive species in Hawaiian rainforest

被引:48
作者
Asner, Gregory P.
Martin, Roberta E.
Carlson, Kimberly M.
Rascher, Uwe
Vitousek, Peter M.
机构
[1] Carnegie Inst Washington, Dept Global Eocl, Stanford, CA 94305 USA
[2] Res Ctr Julich, Inst Chem & Dynam Geosphere, ICG Phytosphere 3, D-52425 Julich, Germany
[3] Stanford Univ, Dept Biol Sci, Stanford, CA 94305 USA
关键词
earth observing-1; Hawai'i; hyperion; hyperspectral remote sensing; Metrosideros polymorpha; Myrica faya; Morella faya; imaging spectroscopy; invasive species; rainforest;
D O I
10.1007/s10021-006-0124-z
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
We compiled a time series of Earth Observing-1 Hyperion satellite observations with field measurements to compare the structural, biochemical, and physiological characteristics of an invasive nitrogen-fixing tree Myrica faya and native Metrosideros polymorpha in montane rainforests in Hawai'i. Satellite-based canopy water measurements closely tracked variations in leaf area index, and the remotely sensed photochemical and carotenoid reflectance indices (PRI, CRI) indicated variations in upper-canopy leaf chlorophyll and carotenoid content during a climatological transition. The PRI and CRI were related to differences in light-use efficiency of each species, as indicated by field measurements of leaf electron transport rate. The suite of hyperspectral metrics indicated maximum differences in the structure, biochemistry, and physiology of Myrica and Metrosideros when canopy vapor pressure deficit was high during hotter and drier periods. These satellite data, combined with the Carnegue-Ames-Stanford Approach (CASA) carbon cycle model, suggested that Myrica growth rates were 16-44% higher than Metrosideros, with relative differences between species closely linked to climate conditions. The satellite hyperspectral data identified the basic biological mechanisms favoring the spread of an introduced tree, and provided a more detailed understanding of how vegetation-climate interactions affect the time course of plant growth with respect to the invasion process.
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页码:1106 / 1117
页数:12
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