JOURNAL OF NATURAL RESOURCES >
Assessment for Polder Terrestrial Ecosystem Functions of Maintaining and Regulating in the Western Taihu Basin
Received date: 2012-12-16
Revised date: 2013-06-21
Online published: 2014-03-20
Polder is an important geographic unit of the water net plain areas in South China, the study of the polder ecosystem service functions is of great significance to the optimization of land use, ecological environmental protection and restoration. This study selected polders in the Western Taihu Basin as a case and calculated four types of ecosystem services functions in terrestrial ecosystems including water regulation, environmental purification, soil conservation and habitat maintenance. The results show: 1) The polder terrestrial ecosystem can regulate water amount of 43.71×108 m3, reduce a total nitrogen of 6079.72 t, and a total phosphorus of 734.99 t, as well as retain 150.76×104 t of soil per year. The landscape composite index ranges from 0.96 to 1.11, reflecting relative great value of service. 2) The total quantity of terrestrial ecosystem service functions have difference in space, as well as the amount of per unit area. From the total quantity, the ecosystem service function of Yixing, Liyang, and Jintan is higher, but for Dantu, Danyang and Wujin, it is lower. Topography and water distribution are the main reasons for the differences. From the amount of unit area, Dantu and Danyang are high, Liyang, Jintan and Yixing are at a general level, Wujin is the minimum. The land use patterns in the polders are the main reasons for the differences. 3) The management and recovery of ecosystem service functions in polders should refer to the results of assessment and be suited to the local conditions. The counties which have strong ecosystem service functions should bring into playing their advantages. And certain measures should be taken to restore the weak ecosystem service functions. 4) The study has reference value for the ecological environmental protection and improvement and the optimization of land use in polders.
DONG Chuan-yong, GAO Jun-feng . Assessment for Polder Terrestrial Ecosystem Functions of Maintaining and Regulating in the Western Taihu Basin[J]. JOURNAL OF NATURAL RESOURCES, 2014 , 29(3) : 420 -430 . DOI: 10.11849/zrzyxb.2014.03.006
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