《Table 6 Ecosystem service value and its changes in Yarkant River basin》

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《1978–2018年叶尔羌河流域土地利用及其生态服务价值变化数据研究》

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To estimate the ecological service value，the revised coefficients were applied to the corresponding formula and the ecosystem service value of the Yarkant River basin was calculated.The results are presented in Table 6.It can be seen that the total ecosystem services value of the Yarkant River basin has gradually decreased，although the whole process is not monotonic.From 1978 to 1988，the ecological service value decreased by 1.43×108 Yuan，before increasing from 1988 to 1998 by 16.24×108 Yuan and then decreasing again from 1998 to2018 by 23.68×108 Yuan.Over the whole study period，there is a decreasing trend，resulting in a total ecosystem value loss of 8.87×108 Yuan.In 1978，1988，1998，2008，and 2018，the production function of the study area was 41.55×108 Yuan，41.12×108 Yuan，45.39×108 Yuan，44.19×108 Yuan，and 52.39×108 Yuan，respectively，and the value of the regulatory function was 346.47×108 Yuan，345.57×108 Yuan，355.54×108 Yuan，342.99×108 Yuan，and 326.49×108 Yuan，respectively.The value of supporting functions was 12.25×108 Yuan，12.21×108Yuan，12.84×108 Yuan，13.14×108 Yuan，and 14.49×108 Yuan，respectively.The cultural functions had a value of 12.25×108 Yuan，12.21×108 Yuan，12.84×108 Yuan，13.14×108 Yuan，and 14.49×108 Yuan，respectively.