The role of remnant forest trees in tropical secondary succession
The role of remnant forest trees in tropical secondary succession
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DOI：
10.1007/bf00045497
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发表时间：
1986-05
期刊：
影响因子：
--
通讯作者：
S. Guevara;Silvia E. Purata;E. Maarel
中科院分区：
文献类型：
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作者：
S. Guevara;Silvia E. Purata;E. Maarel
本文着重介绍了墨西哥维拉克鲁斯洛斯塔克斯特拉斯热带雨林区废弃地和牧场演替过程中残留树木对木本植物物种建立的贡献。残留树木，即传统农民留在空地上的原始大树，将成为过往鸟类和留鸟的自然栖息地。在滞留期间，食果鸟类掉下或回吐落在残树树冠下的种子和果实，从而促进物种的积累，使这些残树成为‘再生核’。运送到这些地点的物种主要属于较老的演替发展阶段，到达这些原本与世隔绝的地区，抵消了密集和广泛砍伐带来的热带土地退化。在对7棵残树的研究中，发现了29种木本植物和两种攀缘植物，其中86%是鸟类分散的。每株树总物种数在6~15种之间，以果实对鸟类有吸引力的残留树为高。去趋势对应分析发现林下植物区系变异与耐荫的初级和晚期次生树相对耐荫的数量与依赖光照的先锋和早期演替树的相对数量相关。
This paper emphasizes the contribution of remnant trees to the establishment of woody species during succession on abandoned fields and pastures in the Mexican rain forest area, Los Tuxtlas, Veracruz.Remnant trees, original large forest trees left in the clearings by traditional farmers will become natural perching sites for both passing and resident birds. Frugivorous birds drop or regurgitate seeds and fruits which fall under the canopies of remnant trees during their stay, thus contributing to an accumulation of species, which make these remnant trees into ‘regeneration nuclei’.The species transported into these sites belong chiefly to older stages of successional development and reach these otherwise isolated areas, counteracting the depauperization of tropical land, brought about by both intensive and extensive clearing.In a study of seven remnant trees, 29 woody species and two climbers were found, 86% of which are bird dispersed. The total number of species per tree varied from 6 to 15 and was higher under remnant trees with fruits attractive to birds.Floristic variations of the understorey as detected by detrended correspondence analysis was correlated with the relative amount of shade-tolerant primary and late secondary trees versus light dependent pioneers and early successional trees.