摘要
选取雾灵山自然保护区莲花池至燕山主峰段盘山公路周边的植被为对象,调查分析了公路建设对沿线植被组成、盖度、密度、生物量的影响。结果表明:1)公路干扰作用下,公路沿线乔木数量减少,但出现不同种类的幼龄乔木;草本植物群落生物量较高,物种丰富度指数、多样性指数较高。2)随样地与路肩距离的增加,草本与灌木层植物群落的生物多样性逐渐降低,乔木层植物群落的密度、高度、胸径均有所增加;距离路肩30m以上时,灌草植物群落组成趋向稳定;距离路肩150m以上时,乔木层植物群落结构趋于稳定。3)公路对植被的干扰作用包括正负2种,乔木层主要受负干扰影响,灌木和草本层主要受正干扰影响,且灌草植物群落所受的干扰作用大于乔木植物群落。4)公路干扰对于边坡上、下区域植被群落物种丰富度影响强度不同,对上边坡植物群落的影响大于下边坡植物群落。
Taking the roadside from Lotus Pond to the main peak of Yanshan Mountain in Wuling Mountain Nature Reserve as a case site, the impact of road construction on the roadside vegetations was studied by investigating the vegetation composition, coverage, biomass, and plant density. Due to road disturbance, the trees along the road decreased in number but their seedlings appeared, while the biomass, species richness index, and diversity index of herbs were higher. With the increasing distance from road shoulder, the plant biodiversity decreased, but the density, height, and diameter at breast height of trees increased. The composition of shrub-grass was constant when the distance from the road shoulder increased over 30 m, and the structure of tree layer had no change when the distance from the road shoulder was over 150 m. The impact of road construction on the vegetations was mainly positive on shrubs and herbage but mainly negative on trees, and the positive impact was larger than the negative impact. The impact on the species richness of plant communities was greater on the upslope than on the downslope of the road.
出处
《生态学杂志》
CAS
CSCD
北大核心
2010年第1期146-151,共6页
Chinese Journal of Ecology
基金
北京市优秀人才项目(PYZZ090422001973)
国家自然科学基金资助项目(30870466)
关键词
干扰
植物群落
优势种群
生物多样性
interference
plant community
dominant species
biodiversity.
