保障粮食安全造成的生态服务价值损失初探

在阐明保障粮食安全造成的生态服务价值损失内涵的基础上, 分析了保障粮食安全造成的生态服务价值损失的类型。研究结果表明: 保障粮食安全造成的生态服务价值损失分为直接损失和间接损失。直接损失包括两方面, 一是粮食生产过程中, 土地利用结构的调整使不同生态系统之间发生合理转换所引起的生态服务价值损失; 二是由于粮食生产对农田生态系统周围的生态系统产生负面影响, 造成其生态服务价值的损失。间接损失是指土地作为粮食生产用地, 而不是生态服务价值更大的土地利用类型(或生态系统类型), 所产生的生态服务价值损失。

Loss of ecosystem services value due to food security

This paper clarified the important issues of the loss of ecosystem services value driven by food security and revealed the types and connotations of the loss. The loss of ecosystem services value caused by guarantee of food security was grouped into direct and indirect loss. Direct loss was further grouped into two. The first of the two groups was caused by conversion among different ecosystems corresponding to the land use adjustment. The second was resulted from adverse effect of food production on ecosystems in the vicinity of agro-ecosystems. Indirect losses was induced by decrease of ecosystem services value of lands, which was used to grain production rather than other land use type (or ecosystem) with higher services value.