SEASONAL DROUGHT, SOIL FERTILITY AND THE SPECIES DENSITY OF TROPICAL FOREST PLANT-COMMUNITIES

被引：116
作者：
WRIGHT, SJ
机构：
[1] Smithsonian Tropical Research Institute, Apartaclo 2072, Balboa
来源：
TRENDS IN ECOLOGY & EVOLUTION | 1992年 / 7卷 / 08期
关键词：
D O I：
10.1016/0169-5347(92)90171-7
中图分类号：
Q14 [生态学（生物生态学）];
学科分类号：
071012 ; 0713 ;
摘要：
Recent comparisons of plant species densities in tropical forest make it possible to evaluate factors that govern species richness. Contrary to earlier predictions, plant species densities are not greater on soils of relatively low fertility. In fact, the opposite trend is often observed, although the relationship between species densities and soil fertility is highly variable. However, tropical forest plant species densities consistently increase with rainfall. Species coexistence in wetter tropical forests may be facilitated by the absence of competition for moisture combined with year-round pest pressure and low understory light levels, which reduce growth rates and the potential for competition for other resources.
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页码：260 / 263
页数：4
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