Journal Title
Title of Journal: Environmental Management
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Abbravation: Environmental Management
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Authors: Demin Yan Fangying Zhao Osbert Jianxin Sun
Publish Date: 2013/06/28
Volume: 52, Issue: 3, Pages: 748-757
Abstract
Stripmining operations greatly disturb soil vegetation and landscape elements causing many ecological and environmental problems Establishment of vegetation is a critical step in achieving the goal of ecosystem restoration in mining areas At the Shouyun Iron Ore Mine in suburban Beijing China we investigated selective vegetation and soil traits on a tailings dam 7 years after site treatments with three contrasting approaches 1 soil covering designated as SC 2 application of a straw mat known as “vegetation carpet” which contains prescribed plant seed mix and water retaining agent designated as VC on top of sand piles and 3 combination of soil covering and application of vegetation carpet designated as SC+VC We found that after 7 years of reclamation the SC+VC site had twice the number of plant species and greater biomass than the SC and VC sites and that the VC site had a comparable plant abundance with the SC+VC site but much less biodiversity and plant coverage The VC site did not differ with the SC site in the vegetation traits albeit low soil fertility It is suggested that application of vegetation carpet can be an alternative to introduction of topsoil for treatment of tailings dam with finestructured substrate of ore sands However combination of topsoil treatment and application of vegetation carpet greatly increases vegetation coverage and plant biodiversity and is therefore a much better approach for assisting vegetation establishment on the tailings dam of stripmining operations While application of vegetation carpet helps to stabilize the loose surface of finestructured mine wastes and to introduce seed bank introduction of fertile soil is necessary for supplying nutrients to plant growth in the efforts of ecosystem restoration of mining areasThis study was funded by a grant from the Beijing Municipal Commission of Education for development of Key Laboratory for Silviculture and Conservation We thank Drs Xiangdong Lei Chinese Academy of Forestry and Xiangcheng Mi Institute of Botany Chinese Academy of Sciences for advice on statistical analysis and two anonymous reviewers for constructive comments that greatly improved the manuscript
Keywords:
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