期刊
SCIENCE
卷 340, 期 6133, 页码 741-744出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1231574
关键词
-
资金
- NSF [DEB 0620652]
The leaf economics spectrum (LES) describes multivariate correlations that constrain leaf traits of plant species primarily to a single axis of variation if data are normalized by leaf mass. We show that these traits are approximately distributed proportional to leaf area instead of mass, as expected for a light-and carbon dioxide-collecting organ. Much of the structure in the mass-normalized LES results from normalizing area-proportional traits by mass. Mass normalization induces strong correlations among area-proportional traits because of large variation among species in leaf mass per area (LMA). The high LMA variance likely reflects its functional relationship with leaf life span. A LES that is independent of mass-or area-normalization and LMA reveals physiological relationships that are inconsistent with those in global vegetation models designed to address climate change.
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