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平朔露天煤矿植被恢复区物种天然更新格局及其驱动因素

Temporal- spatial Dynamics of Natural Regeneration of Species in Ecological Reclamation of ATB Opencast Coal Mine
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摘要 以安太堡露天煤矿植被恢复区0.8ha"刺槐+榆树+油松混交模式"长期固定监测样地为研究平台,基于2010年和2015年两次幼苗幼树的调查数据,对植被恢复过程中主要更新物种的数量特征和空间分布格局的变化进行了分析。研究表明:2010-2015年间,样地内幼苗个体数由8587株减少为3673株,幼树个体数由307株减少为172株;从群落水平来看,幼苗在各生境类型下个体数量的分布略有差异。2010年的幼苗在样地四个角和中部呈聚集分布。幼苗个体数量的分布表现为高坡>高谷>山谷>低坡。而2015年呈高坡>山谷>高谷>低坡的趋势。幼树在不同生境类型下的个体数相差不多。无论在群落水平还是物种水平,幼苗幼树高度和生物因子共同影响幼苗幼树的存活。本研究为揭示不同植物配置模式种群的天然更新和物种共存及维持机制提供基础资料,同时为优化复垦土地植被恢复模式和促进矿区土地可持续利用提供理论依据。 A 0. 8- ha permanent plot at the eco- reclamation area in Antaibao Opencast Coal mine of China Coal Pingshuo Coal Company Limited was established after reforestation of a mixed plantation of"locust( Robinia pseudoacacia) + elm( Ulmus pumila) + Chinese pine( Pinus tabuliformis) ". Applying the R programming language and based on the two census data in2010 and 2015, an analysis was made on characteristics of qualities and changes in spatial distribution pattern of the regeneration of main tree species,the law of natural regeneration and drivers of the seedlings and saplings of the plot in 2010-2015. It provides a scientific basis for the biodiversity conservation and artificial vegetation continuing operations in this area.Also,it provides basic information for natural regeneration and species coexistence mechanisms of different plant configuration modes.
出处 《环境与可持续发展》 2016年第2期172-176,共5页 Environment and Sustainable Development
基金 国土资源部土地整治重点实验室资助的开放基金项目"山西平朔煤矿土地植被恢复物种变化过程研究"(项目编号:20140136)
关键词 植被恢复 更新 空间格局 时空动态 vegetation restoration regeneration spatial pattern temporal-spatial dynamics
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参考文献13

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