社会—生态网络空间错位对水土流失治理的影响机制

Soil erosion control depends not only on the ecological networks formed by environmental factors of the watershed, but also on the social networks constituted by capital and information that are dominated by stakeholders in governance. Social networks with clear administrative boundaries and watershed ecological networks are generally spatially mismatched. Resource allocation will be affected by the administrative divisions and the distribution pattern of participants' interests in the social network, and this will result in the unfit of water and soil erosion control needs and resource allocation in the basin.In view of that, the project selects the Meijiang River basin, a typical watershed in the Southern Red Soil Region, as the research object..Based on the soil erosion pattern and process, the watershed ecological network will be interpreted, the interaction pattern of regional social network hierarchy structure and its internal nodes will be revealed. The impact of socio-ecological network spatial misalignment on resource allocation and the response mechanism of soil erosion management effectiveness will be clarified, and the response of the effectiveness of soil erosion control to spatial mismatch of eco-social networks will be revealed. The study will provide scientific basis for improving the utilization efficiency of social resources and the effectiveness of soil erosion control.

水土流失治理不仅取决于流域环境要素构成的生态网络，还受制于治理中利益相关者所支配的资本、信息等所构成的社会网络。具有明显行政边界的社会网络与流域生态网络又普遍存在空间上的错位，资源配置必将受到社会网络中行政区划、参与者利益分配格局的影响，并导致流域水土流失治理需求与资源配置效率不高的问题。鉴于此，本项目选择南方红壤区典型流域—梅江流域为研究对象，基于水土流失格局与过程解析流域生态网络，揭示区域社会网络层级结构及其内部节点互动规律，阐明社会—生态网络空间错位对资源配置的影响及水土流失治理成效的响应机制，探讨消除空间错位不利影响的途径，为提高水土流失治理中资源利用效率提供科学依据。

水土流失治理不仅取决于流域环境要素构成的生态网络，还受制于治理中利益相关者所支配的资本、信息等所构成的社会网络。具有明显行政边界的社会网络与流域生态网络又普遍存在空间上的错位，资源配置必将受到社会网络中行政区划、参与者利益分配格局的影响，并导致流域水土流失治理需求与资源配置效率不高的问题。鉴于此，本项目以贡水流域为主要研究区域，综合野外调查、长期监测和农户、机构调研结果，分析了流域水土流失演变和生态网络的结构功能特性，构建农户、政府机构不同层级社会网络并识别其关键节点，探讨社会网络节点间互动以及关键节点对信息传递、资源配置的影响，系统剖析了不同层级社会网络对水土流失的影响机制，揭示了社会-生态网络空间错位对水土流失治理的影响机制。结果表明，农户、政府管理机构社会网络通过影响信息技术传递效率、资源配置而对水土流失治理产生显著影响，以区县行政单元主导实施的水土流失治理显著影响资源配置和治理成效，增强农户和管理机构的交流将显著提高农户参与水土流失治理的意愿。研究成果可为流域水土流失的协同治理、提高社会资源利用效率提供科学依据。项目执行期内，在Journal of Environmental management、Environmental Research Letters、Journal of Cleaner Product、Environmental Science & Technology等期刊发表论文9篇，培养硕士研究生5名。