Yu Xiao-Dong, Luo Tian-Hong, Zhou Hong-Zhang
Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
Environ Entomol. 2009 Aug;38(4):1053-60. doi: 10.1603/022.038.0412.
Edge effects resulting from logging on the distribution of carabid beetles (Coleoptera: Carabidae) were studied across ecotones between regenerating and mature forests established after harvesting of old-growth forests 20 yr prior to this study in southwestern China. Using pitfall traps, beetles were collected along five ecotone transects using nine samples with a distance interval of 25 m each. Although no significant differences were found in species richness and abundance of carabids among all three habitats, i.e., mature forest, young regenerating stand, and edge habitat, rarefaction estimates of species richness indicated that traps in young regenerating stands accumulated species faster than those on mature forest interiors and forest edges. Carabid species composition of the forest edges was more similar to those of the mature forest interiors than to those of the young regenerating stands. Variability in species composition was significantly reduced in young stands, suggesting that the carabid community from young stands is more homogeneous than the one from mature forests. Although most species occurred in all habitats, some species were significantly more abundant in mature forests and/or edges than in young stands. Results indicated that edge effects on forest carabids may persist for at least 20 yr after disturbance.
在中国西南部，针对20年前老龄林采伐后形成的再生林与成熟林之间的生态交错带，研究了伐木对步甲（鞘翅目：步甲科）分布产生的边缘效应。使用陷阱诱捕法，沿着五条生态交错带样带，每隔25米设置9个样本，收集步甲。尽管在成熟林、幼龄再生林和边缘生境这三种生境中，步甲的物种丰富度和数量未发现显著差异，但物种丰富度的稀疏估计表明，幼龄再生林中陷阱积累物种的速度比成熟林内部和林缘更快。林缘步甲的物种组成与成熟林内部的更为相似，而与幼龄再生林的差异较大。幼龄林中物种组成的变异性显著降低，这表明幼龄林的步甲群落比成熟林的更具同质性。尽管大多数物种在所有生境中都有出现，但一些物种在成熟林和/或边缘生境中的数量明显多于幼龄林。结果表明，森林干扰后，边缘效应可能至少持续20年。
