生态系统服务对土地利用转移流的响应及权衡分析——以渭南市为例

发布时间：2018-02-23 07:26

本文关键词： 生态服务土地利用响应权衡　出处：《西北师范大学学报(自然科学版)》2017年03期 　论文类型：期刊论文

【摘要】：基于GIS与RS支持,以渭南市为研究区,定量分析固碳释氧价值、涵养水源价值和土壤保持价值与土地利用转移流的耦合效应.结果表明,2000—2010年,耕转林、草转耕和耕转建为渭南市的关键土地利用转移流,占总量的50.83%;草转林、耕转草和建转耕为次关键转移流,占25.45%.对提升区域生态系统服务能力贡献度最大的主要是耕转林和建转耕,分别达3.52和2.07亿元;造成生态系统服务价值降低的主要是耕转建、林转未和林转耕,分别为-3.62,-1.19和-1.09亿元.研究时段内,引起固碳释氧、涵养水源和土壤保持三大生态系统服务协同增加的土地利用转移流有耕转林、草转林、建转耕、水转耕和水转草,导致三大生态系统服务协同降低的土地利用转移流有林转耕、林转草、林转未、耕转水和耕转建.草转耕和耕转草存在权衡问题.其中,草转耕利于固碳释氧和涵养水源,但导致水土流失,总体生态效应为负,宜予以遏制;耕转草会导致固碳释氧和涵养水源能力的降低,但利于水土保持,且总体效应利于生态服务价值的提高,宜予以提倡.
[Abstract]:Based on the support of GIS and RS, the coupling effects of carbon sequestration and oxygen release value, water conservation value, soil conservation value and land use transfer flow were quantitatively analyzed in Weinan city. The conversion of grass to forest, tillage to grass and construction to construction are the key land use transfer flows in Weinan city, accounting for 50.83% of the total amount, while the conversion of grass to forest, tillage to grass and construction to tillage are secondary key transfer flows. The biggest contribution to the capacity of ecosystem service in the region was mainly from tillage to forest and construction to tillage, which amounted to 3.52 and 207 million yuan respectively, which resulted in the reduction of ecosystem service value mainly by tillage conversion, forest conversion and forest conversion. During the study period, the land use transfer flow, which resulted in the synergistic increase of carbon sequestration, water conservation and soil conservation ecosystem services, included tillage to forest, grass to forest, construction to tillage, water to water to grass, and water to grass to grass, during the period of study, which were -3.62% -1.19 and-109 million yuan, respectively. Among the land use transfer flows that lead to the synergistic reduction of three major ecosystem services are forest conversion, forest to grass, forest to grass, tillage to water and tillage to construction. There are trade-offs between grass and tillage. Among them, grass conversion is beneficial to carbon sequestration, oxygen release and water conservation. But soil and water loss, the overall ecological effect is negative, should be contained, tillage and conversion of grass will lead to carbon sequestration, oxygen release and water conservation capacity decreased, but conducive to soil and water conservation, and the overall effect is conducive to the improvement of the value of ecological services, should be advocated.
【作者单位】：宁夏大学资源环境学院;宁夏大学土木与水利工程学院;
【基金】：宁夏自治区高等学校科研基金资助项目(NGY2015038)
【分类号】：F301.2;X826

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