鼎湖山森林道路边缘效应  

Edge effect of road in Dinghushan forests.

作　　者：周婷[1] 彭少麟[1] 林真光[1] 

机构地区：[1]中山大学有害生物控制与资源利用国家重点实验室,广州510006

出　　处：《生态学杂志》2009年第3期433-437,共5页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(30670385;U0633002);中山大学张宏达科学研究基金资助项目

摘　　要：研究了鼎湖山自然保护区内森林群落由于道路而引发的边缘效应,探讨林内公路对森林的影响。以鼎湖山一条6m宽的盘山公路两旁的群落为研究对象,离道路两侧0、10、20和30m等不同距离处设置30m×5m样带,进行植被调查,并对样带内的土壤进行理化性质分析。结果表明,紧邻道路两边样带的乔木总生物量略高于群落内部,表现出边缘的正效应。道路坡下边缘土壤的pH值较高,全氮含量最低,边缘效应为负效应。而植被多样性组成和土壤含水量方面,没有表现出明显的边缘效应。总的来说,道路的修建对森林群落的完整性造成一定的影响,位于道路旁边的群落边缘效应有多方面不同的表现形式。在保护区中要进行道路合理规划,综合考虑土壤、植被等因素,尽量减小道路对森林群落造成的负面影响。This paper studied the edge effect of road in the forests in Dinghushan Natural Reserve of Guangdong Province, and approached the effects of road in forests on forest ecosystem. Four 30 m × 5 m transects with a distance of 0, 10, 20, and 30 m from the both sides of a 6-m-wide winding mountain road were installed to conduct vegetation investigation and soil analysis. The results showed that the total tree biomass in the transects adjacent the road was slightly higher than that of the inner forest communities, showing a positive edge effect, while the soil acidity and total nitrogen content in downgrade transects showed a negative edge effect. Neither species diversity nor soil moisture content exhibited obvious edge effect. As a whole, road construction had definite negative effects on the integrality of forest ecosystem, producing artificial linear gaps and generating edge effect in the characteristics of vegetation and soil. The edge effect caused by forest road should be considered in the management of Natural Reserve.

关 键 词：森林斑块 道路 边缘效应 

分 类 号：Q948[生物学—植物学]