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Impacts of land management on ecosystem service delivery in the Baiyangdian river basin

机译：白洋淀流域土地管理对生态系统服务提供的影响

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As the largest freshwater lake in northern China, Lake Baiyangdian provides a diversity of ecosystem services: it guarantees water flow to a number of beneficiaries and is an important component of sustainable regional development. However, the flows of sustainable ecosystem services from Lake Baiyangdian mainly depend on upstream hydrological and nutrient retention functions. For sustainable land management, it is important to explore the implications of upstream land-use changes by humans on the ecosystem services supplied by Lake Baiyangdian. In this study, ecological assets and hydrological time series were analysed, and the InVEST model was used to investigate the implications of land management on the delivery of ecosystem services. The results showed that significant changes in ecological assets occurred in the Baiyangdian river basin during the period 1980-2007, characterised particularly by an increase in forested area and a decline in wetland area. A significant decline in the ecological status of the Baiyangdian river basin, expressed as an abrupt change in stream flow time series 1970-2011, was also noted. Water yield and surface run-off functions were mainly influenced by precipitation, but changes in land-cover patterns exacerbate the impacts of these two factors. Nutrient retention was influenced more by altered land cover than by precipitation. Due to data gaps, it was not possible to link upstream ecosystem functions to the ecosystem services contributed by Lake Baiyangdian. It will be necessary to establish a long-term ecological monitoring programme in order to gather the data needed to gain a deeper understanding of the interconnections between ecosystem function and services. The ultimate aim of such a programme must be to incorporate ecosystem services into ecosystem management and policy-making.
机译：作为中国北方最大的淡水湖，白洋淀湖提供了多样化的生态系统服务：它保证了水流向许多受益者，并且是区域可持续发展的重要组成部分。然而，来自白洋淀的可持续生态系统服务的流量主要取决于上游的水文和养分保留功能。对于可持续土地管理，重要的是探索人类上游土地利用变化对白洋淀湖提供的生态系统服务的影响。在这项研究中，分析了生态资产和水文时间序列，并使用InVEST模型调查了土地管理对生态系统服务提供的影响。结果表明，白洋淀流域在1980-2007年期间生态资产发生了显着变化，特别是森林面积增加而湿地面积减少。人们还注意到，白洋淀流域的生态状况显着下降，表现为河流流量时间序列1970-2011年的突然变化。水分和地表径流功能主要受降水影响，但土地覆盖格局的变化加剧了这两个因素的影响。营养素保留受土地覆盖变化的影响大于降水的影响。由于数据缺口，不可能将上游生态系统功能与白洋淀湖贡献的生态系统服务联系起来。为了收集对生态系统功能和服务之间的联系有更深入了解所需的数据，有必要建立长期的生态监测计划。这种方案的最终目的必须是将生态系统服务纳入生态系统管理和政策制定。

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