Species distributions in response to individual soil nutrients and seasonal drought across a community of tropical trees

被引:398
作者
Condit, Richard [1 ]
Engelbrecht, Bettina M. J. [1 ,2 ]
Pino, Delicia [2 ]
Perez, Rolando [1 ]
Turner, Benjamin L. [1 ]
机构
[1] Smithsonian Trop Res Inst, Balboa, Ancon, Panama
[2] Univ Bayreuth, Dept Plant Ecol, D-95440 Bayreuth, Germany
基金
美国国家科学基金会;
关键词
tropical soil resources; phosphorus limitation; climate response; environmental control; plant communities; RAIN-FOREST; HABITAT SPECIALIZATION; DISTRIBUTION PATTERNS; PHOSPHORUS; NITROGEN; MECHANISMS; DIVERSITY; VEGETATION; MORTALITY; RESERVE;
D O I
10.1073/pnas.1218042110
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
Tropical forest vegetation is shaped by climate and by soil, but understanding how the distributions of individual tree species respond to specific resources has been hindered by high diversity and consequent rarity. To study species over an entire community, we surveyed trees and measured soil chemistry across climatic and geological gradients in central Panama and then used a unique hierarchical model of species occurrence as a function of rainfall and soil chemistry to circumvent analytical difficulties posed by rare species. The results are a quantitative assessment of the responses of 550 tree species to eight environmental factors, providing a measure of the importance of each factor across the entire tree community. Dry-season intensity and soil phosphorus were the strongest predictors, each affecting the distribution of more than half of the species. Although we anticipated clear-cut responses to dry-season intensity, the finding that many species have pronounced associations with either high or low phosphorus reveals a previously unquantified role for this nutrient in limiting tropical tree distributions. The results provide the data necessary for understanding distributional limits of tree species and predicting future changes in forest composition.
引用
收藏
页码:5064 / 5068
页数:5
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