The response of key ecosystem services to land use and climate change in Chongqing: Time,space, and altitude |
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| Authors: | Gao Jie Bian Hongyan Zhu Chongjing Tang Shuang |
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| Affiliation: | 1. Chongqing Jinfo Mountain Karst Ecosystem National Observation and Research Station, School of Geographical Sciences, Southwest University, Chongqing 400715, China2. Chongqing Key Laboratory of Karst Environment, School of Geographical Sciences, Southwest University, Chongqing 400715, China3. School of Geographical Sciences, State Cultivation Base of Eco-agriculture for Southwest Mountainous Land, Chongqing 400715, China |
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| Abstract: | Mountainous landscapes are particularly vulnerable and sensitive to climate change and human activities,and a clear understanding of how ecosystem services (ES) and their relationships continuously change over time,across space,and along altitude is therefore essential for ecosystem management.Chongqing,a typical mountainous region,was se-lected to assess the long-term changes in its key ES and their relationships.From 1992 to 2018,the temporal variation in water yield (WY) revealed that the maximum and minimum WYs occurred in 1998 and 2006,which coincided with El Ni(n)o-Southern Oscillation and se-vere drought events,respectively.Soil export (SE) and WY were consistent with precipitation,which reached their highest values in 1998.During this period,carbon storage (CS) and habitat quality (HQ) both decreased significantly.ES in Chongqing showed large variations in altitude.Generally,WY and SE decreased with increasing altitude,while CS and HQ in-creased.For spatial distribution,WY and SE showed positive trends in the west and negative trends in the east.In regard to CS and HQ,negative trends dominated the area.Persistent tradeoffs between WY and soil conservation (SC) were found at all altitude gradients.The strong synergies between CS and HQ were maintained over time. |
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| Keywords: | ecosystem services InVEST model Mann-Kendall tradeoffs synergies mountainous region |
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