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OALib Journal期刊
ISSN: 2333-9721
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陕南秦巴山区植被生态功能的价值测评
DOI: 10.11821/xb200304003, PP. 503-511
Keywords: 区域植被,生态功能,价值测评,陕南秦巴山区
Abstract:
根据秦巴山区20世纪末植被类型及覆盖度的分布，在GIS支持下测定秦巴山区植被生产和生态调节的物质量。利用生态经济学方法，测定各类植被生态功能的价值，建立秦巴山区植被生态数据库及植被生态账户。生态服务功能价值测评中，充分考虑了不同类型的覆盖度差异，并结合能量平衡、水量平衡和区域蒸散模式，测评结果表明陕南秦巴山区植被生态系统有机质生产价值为199.6×108元/a；植被保持土壤经济价值为22.64×108元/a；植被涵养水源的经济价值为22.66×108元/a；植被固定CO2价值为352.24×108元/a；释放O2价值为374.19×108元/a；陕南秦巴山区植被有机物生产、保持土壤、涵养水源、固定CO2和释放O25种生态服务功能价值共968.33×108元/a。其中温带落叶阔叶林贡献率最高占29.35%，亚热带竹林、亚高山灌丛、草甸草原、山麓果树生态服务价值比重均在1%以下。
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