鄱阳湖流域基本特征、面临挑战和关键科学问题

鄱阳湖流域总面积占长江流域面积的9%，占江西省国土面积的939%，鄱阳湖流域的生态健康维系着流域内，特别是长江中下游的生态安全，是区域经济、社会、生态可持续发展的重要保障。在全面认识鄱阳湖流域基本特征和面临挑战的基础上，探讨了鄱阳湖流域面临的五大科学问题：“山 江 湖”的相互关系与流域的生态健康；全球变化背景下流域生态系统的响应；流域生物多样性地理格局与社会经济合理分区；长江流域环境演变对鄱阳湖流域的影响；流域科学管理的理论与实践。为鄱阳湖生态经济区的建设和全流域的综合管理提供科学的建议和对策

BASIC CHARACTERISTICS,CHALLENGES AND KEY SCIENTIFIC QUESTIONS OF THE POYANG LAKE BASIN

The total area of the Poyang Lake Basin accounts for 9% of the area of the Yangtze River Basin and 93.9% of the land area in Jiangxi Province.The ecological health in the Poyang Lake basin holds together the ecological security of the watershed,especially in the middle and lower reaches of the Yangtze River.It is an important guarantee for the sustainable development in regional economy,society and ecology.On the basis of comprehensive understanding of the Poyang Lake Basin,five scientific questions facing the Poyang Lake Basin are explored in this article:the relationship among "Mountain-River-Lake" and the ecological health of the basin;the ecosystem response of basin under the global changes;geographical patterns for watershed biodiversity and reasonable division of socio-economy;the impact of environmental changes in the Yangtze River basin on the Poyang Lake Basin;the theory and practice of scientific watershed management.Scientific advices and countermeasures are proposed for the construction of Poyang Lake Ecological Economic Zone and the integrated management of the whole basin.