中文摘要：

与水相关的生态系统服务是生态学研究的热点问题。水供给服务对区域水循环和水量平衡具有至关重要的作用。东江湖流域是国家重点流域和水资源生态补偿试点,水供给服务是该流域生态系统服务保护的重中之重。本文利用In VEST模型和社会经济数据、水资源数据分析了东江湖流域及其受益区水供给服务的产生与使用的时空分布格局,并对水供给服务的供需平衡进行时空计算,探究水供给服务的时空格局演变。结果表明：（1）1995-2010年东江湖流域及其受益区范围内的产水量整体呈现先增加后减少的趋势,在9350-12 400 m3 ha-1 y-1之间变化,2000年的平均产水量最高。各年产水量的空间分布格局相似,由上游向下游产水量逐渐减少,且城市群周边地区产水量减少的趋势比较明显。（2）1995-2010年东江湖流域及其受益区平均用水量在2900-4450 m3 ha-1 y-1之间变化,各年用水量的空间分布格局相似,均从城镇建设用地向四周递减,呈现较明显的城乡梯度变化,此外,河流两岸和湖泊周边地区的用水量较多,明显高于其他区域。（3）1995-2010年城镇建设用地及其邻近区域、河流湖泊沿岸地区的水供给服务供不应求,其他区域的水供给服务能够满足需求,其中长株潭城市群形成的品字形区域是受益区范围内供需状况最为紧张的区域。

英文摘要：

Water-related ecosystem services is a hot topic in ecological research. Water supply services are crucial to regional water cycles and water quantity balance. The Dongjiang Lake basin is a national priority river basin in China where ecological compensation pilot programs concerning water resources and water supply services are top priorities for ecosystem service protection. We analyzed spatial and temporal patterns associated with generation and use of water supply services in the Dongjiang Lake basin using the In VEST model, socio-economic data and water resource data. We found that between 1995 and 2010, water yield in the Dongjiang Lake basin and its beneficiary areas increased before declining, varying 9350–12 400 m3 ha-1 y-1; average water yield peaked in 2000. The spatial distribution patterns of water yield during these years are similar, progressively decreasing from upstream to downstream with a remarkable reduction in surrounding areas of city clusters. Average water consumption of the basin and its beneficiary areas ranged from 2900–4450 m3 ha-1 y-1 between 1995 and 2010; the spatial distribution patterns of water consumption during these years are similar, dropping gradually from urban construction land to its surroundings with a stronger gradient between urban and rural areas. More water was consumed on both banks and surroundings of the lake. From 1995 to 2010, water supply fell short of demand for urban construction land and its proximity as well as areas along the lake. Water supply services were able to satisfy needs in other regions. The Changsha-Zhuzhou-Xiangtan city cluster suffers from the most strained water supply.