期刊
FORESTS
卷 9, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/f9100620
关键词
agricultural landscape; dispersal limitation; establishment limitation; pasture; primary forest; secondary forest; seeds; seedlings; tropical forests
类别
资金
- University of Illinois
- Mexican Consejo Nacional de Ciencia y Tecnologia (CONACyT)
- National Geographic Society
- National Science Foundation of the United States [DEB 0516259]
- Universidad Autonoma del Estado de Morelos
- Universidad Nacional Autonoma de Mexico
Factors that influence tropical-forest regeneration have been of interest across the tropics. We tested the degree of dispersal and establishment limitation of pioneer and non-pioneer tree species with different dispersal modes and seed sizes, using data on both seed fall and seedling establishment in primary forest, secondary forest, and pasture excluded from livestock. The study took place in a lowland tropical rain forest in southeastern Mexico. To calculate dispersal and establishment limitation, we used a density-weighted index that considers: (1) whether a seed or seedling of a given species has arrived in the sample area; and (2) the fraction of seeds or seedlings contributed by a given species relative to the total number of seeds or seedlings arriving at a sampling station. Dispersal limitation of non-pioneer species and animal-dispersed species decreased with succession. The secondary forest had less dispersal limitation for wind-dispersed pioneers than pasture, resulting in a dense aggregation of species with seeds dispersed by wind. Overall, establishment limitation differed between animal-dispersed and wind-dispersed species in the primary forest, and was negatively correlated with seed size. The low capacity of most species to arrive, germinate, and establish as seedlings in pastures slows succession back to forest. To overcome barriers to natural succession in pastures, transplanting seedlings of non-pioneer species is suggested because most of them show high dispersal and establishment limitation.
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