期刊
FOREST ECOLOGY AND MANAGEMENT
卷 256, 期 11, 页码 1939-1948出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.foreco.2008.07.034
关键词
Allometry; Crown radius; Hierarchical Bayes; DBH; Propagating uncertainty; Crown shape
类别
资金
- NSH [SEII 0430693, DEB 0425465, DEB-9981392, DEB 9632854, DEB-0218001]
- Division Of Environmental Biology
- Direct For Biological Sciences [823293] Funding Source: National Science Foundation
There is growing recognition of the role of mechanistic scaling laws in shaping ecological pattern and process. While such theoretical relationships explain much of the variation across large scales, at any particular scale there is important residual variation that is left unexplained among species, among individuals within a species, and within individuals themselves. Key questions remain on what explains this variability and how we can apply this information in practice, in particular to produce estimates in high-diversity systems with many rare and under-sampled species. We apply hierarchical Bayes statistical techniques to data on crown geometry from diverse temperate forests in order to simultaneously model the differences within and among species. We find that tree height, canopy depth, and canopy radius are affected by both successional stage and wood mechanical strength, while tree height conforms to the predicted 2/3 power relationship. Furthermore, we show that hierarchical modeling allows us to constrain the allometries of rare species much more than traditional methods. Finally, crown radius was shown to vary substantially more within individuals than among individuals or species, suggesting that the capacity for local light foraging and crown plasticity exerts the dominant control on tree crowns. (C) 2008 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据