基于土地利用的生态系统服务价值估算尺度效应研究

Study on the Scale Effect of Ecosystem Service Value Estimation Based on Land Use

土地利用/覆盖(LULC)对生态环境具有重要影响,是计算生态系统服务价值的重要数据,然而不同空间尺度或不同LULC的产品数据,计算出来的生态系统服务价值是否有差异,以及差异程度尚不明确。论文采用两种土地利用产品数据,并使用重采样的方式获取了两套不同分辨率的数据,通过当量因子法计算出生态系统服务价值,研究了不同尺度LULC对ESVs的影响。结果表明:(1)不同产品或同种产品用尺度不同的土地利用数据计算出的生态系统服务价值的结果不同。(2)两种土地利用数据计算出来的ESVs相差了大约1.7%,并且随着尺度的增加,差值有减小的趋势。(3)随着LULC尺度的增加,ESVs的总体变化趋势也是增加的,增加的趋势逐渐缓和,并且ESVs与LULC尺度符合对数关系,拟合度R2>0.9。研究结果为获取可靠生态系统服务价值具有重要参考价值。

Land use/land cover(LULC)has an important impact on the ecological environment and is crucial for calculating ecosystem service values(ESVs).However,whether and to what extent the ESVs vary when calculated by LULC product data at different spatial scales remain unclear.Data from two LULC products were used in this study,and two datasets with different spatial scales were obtained by resampling.Then,the ESVs were calculated by the equivalent factor method.Finally,the impacts of LULC on ESVs at different scales were studied,the following results are obtained:(1)The ESVs calculated by LULC products and by the same products at different scales are different.(2)The difference in the ESVs calculated by the two LULC datasets is approximately 1.7%,and the difference tends to decrease with increasing scale.(3)With an increase in the LULC scale,the overall change trend of ESVs also increases,and the increasing trend gradually moderates.In addition,the ESVs and LULC scale conform to a logarithmic relationship,and the coefficient of de-termination(R2)is greater than 0.9.These results have important reference value for obtaining reliable ESVs.