Popradit Ananya, Srisatit Thares, Kiratiprayoon Somboon, Yoshimura Jin, Ishida Atsushi, Shiyomi Masae, Murayama Takehiko, Chantaranothai Pranom, Outtaranakorn Somkid, Phromma Issara
Inter-Department of Environmental Science, Graduate School of Chulalongkorn University, Phayathai Rd. Phatumwan, Bangkok 10330, Thailand.
Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn University, Phayathai Rd, Phatumwan, Bangkok 10330 Thailand.
Sci Rep. 2015 Oct 5;5:14689. doi: 10.1038/srep14689.
The protection of tropical forests is one of the most urgent issues in conservation biology because of the rapid deforestation that has occurred over the last 50 years. Even in protected forests, the anthropogenic effects from newly expanding villages such as harvesting of medicinal plants, pasturing cattle and forest fires can induce environmental modifications, especially on the forest floor. We evaluated the anthropogenic effects of the daily activities of neighboring residents on natural forests in 12 plots extending from the village boundary into a natural forest in Thailand. The basal area per unit land area did not present a significant trend; however, the species diversity of woody plants decreased linearly towards the village boundary, which caused a loss of individual density because of severe declines in small saplings compared with adult trees and large saplings in proximity to the village. An analysis of tree-size categories indicates a lack of small samplings near the village boundary. The current forest appears to be well protected based on the adult tree canopy, but regeneration of the present-day forests is unlikely because of the loss of seedlings.
由于过去50年里森林砍伐迅速，热带森林保护是保护生物学中最紧迫的问题之一。即使在受保护的森林中，新扩张村庄的人为影响，如药用植物采集、放牛和森林火灾，也会引起环境变化，尤其是在森林地面。我们评估了泰国一个村庄周边居民日常活动对从村庄边界延伸至天然森林的12个样地中天然森林的人为影响。单位土地面积的基部面积没有呈现出显著趋势；然而，木本植物的物种多样性朝着村庄边界呈线性下降，由于靠近村庄处小树与成年树和大树苗相比严重减少，导致个体密度降低。对树木大小类别的分析表明村庄边界附近缺少小树苗。基于成年树冠层，当前森林似乎得到了很好的保护，但由于幼苗缺失，当今森林不太可能再生。
