Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8846388 | Acta Ecologica Sinica | 2017 | 6 Pages |
Abstract
Studies on ecosystem service function have an important significance for analyzing and understanding global warming. With the introduction of geographic information system (GIS) and remote sensing (RS) technologies for the evaluation of ecosystem service function, the scope for analysis has been widening. Increasing number of researchers use these technologies to quantify the value of ecosystem service functions and reveal their spatial-temporal variability. By using the data for the interpretation of five RS images and net primary productivity (NPP) in Qinghai Lake basin, we assessed the value of vegetation carbon fixation and oxygen release services and revealed their dynamic variation in this basin. The result suggested that the average values of vegetation carbon fixation and oxygen release services in Qinghai Lake basin between 1987 and 2010 were spatially distributed in a ring shape around the Qinghai Lake and decreased from southeastern to the north and northwestern regions; the northwestern areas had the lowest value. The vegetation carbon fixation value between 1987 and 2010 was on an average 28.87Â ÃÂ 108Â yuan/a in Qinghai Lake basin, whereas the oxygen release value was 64.41Â ÃÂ 108Â yuan/a. Alpine meadow ecosystem showed the highest value of vegetation carbon fixation and oxygen release services function in Qinghai Lake basin, with average values of 18.28Â ÃÂ 108Â yuan/a and 40.79Â ÃÂ 108Â yuan/a, respectively, followed by those of temperate steppe and sparse vegetation. The vegetation carbon fixation and oxygen release values in Qinghai Lake basin gradually increased from 1987 to 2010, with the maximum value in 2010. By the end of 2010, the values increased by 7.19Â ÃÂ 108 yuan and 16.04Â ÃÂ 108 yuan, respectively. The values slightly decreased in barren land, lakeside marsh, river valley swamp, and sandy areas, but increased to different degrees in other ecosystems. Among them, the largest increase was noted in alpine meadow (4.38Â ÃÂ 108 yuan and 9.78Â ÃÂ 108 yuan, respectively), followed by those in temperate steppe with increased values of 1.12Â ÃÂ 108 yuan and 2.49Â ÃÂ 108 yuan, respectively.
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Authors
Tao Zhang, Guangchao Cao, Shengkui Cao, Xiaoge Zhang, Jing Zhang, Guangzhao Han,