云南省植被固碳能力与产水、土壤保持服务冷热点识别

Cold and hot spots identification for carbon sequestration capacity,water yield and soil conservation services of vegetation in Yunnan Province

本文以云南省作为研究区域,评估植被生态系统的固碳能力与典型生态系统服务,并通过空间冷热点分析识别出固碳能力与典型生态系统服务的综合空间冷热点区域,结果表明:(1)2000~2020年,云南西双版纳地区的固碳能力最大,最大值分别为590.02和591.15gC/m^(2);固碳能力变化方面,迪庆、昭通、怒江、德宏以及临沧的固碳能力增加,占云南省地级市总数的37.5%;其余地区固碳能力呈下降趋势.整体来看,云南省植被生态系统固碳能力整体呈下降趋势.(2)2000~2020年,云南省产水服务能力最大值为2215.84和2045.83mm,产水服务总量变化总体呈下降趋势;2000~2020年,云南省土壤保持服务能力总体呈增加趋势,仅有德宏土壤保持服务总量呈降低趋势,占云南省地级市总数的6.25%;昆明、迪庆、怒江等其他地区的土壤保持服务能力为增加趋势.(3)2000~2020年,云南省植被固碳能力-产水服务-土壤保持三项服务的综合空间热点布局变化较小,冷点布局变化较大.综合空间的热点区域(99%可信度、95%可信度、90%可信度)主要分布于西双版纳、普洱、临沧、德宏等地区,其中,极热点区域(99%可信度)在西双版纳分布最为明显.研究结果可为固碳能力与生态系统服务空间格局优化提供参考.

Taking Yunnan Province as the study area,this study evaluated the carbon sequestration capacity and typical ecosystem services of its vegetation ecosystems,and identified the integrated cold and hot spots areas of carbon sequestration capacity and typical ecosystem services through spatial cold spot analysis.The results showed that.(1)The carbon sequestration capacity of Xishuangbanna in Yunnan Province was the largest from 2000 to 2020,with maximum values of 590.02gC/m^(2)in 2000 and 591.15gC/m^(2)in 2020,respectively.In terms of the change in sequestration capacity,the carbon sequestration capacity of Diqing,Zhaotong,Nujiang,Dehong and Lincang was increasing,accounting for 37.5%of the total city in Yunnan Province,while the other cities showed decreasing trend in sequestration capacity.Overall,the carbon sequestration capacity of vegetation ecosystems in Yunnan Province showed decreasing trend.(2)From 2000 to 2020,the maximum water yield service capacity in Yunnan was 2215.84mm in 2000 and 2045.83mm in 2020,and the change in total water yield was generally decreasing.From 2000 to 2020,the total soil conservation service capacity in Yunnan Province showed overall increasing trend.Specifically,the soil conservation service capacity of Kunming,Diqing,Nujiang,and other regions showed increasing trend and only Dehong showed decreasing trend in the total soil conservation service,which accounted for 6.25%of the total city of Yunnan Province.(3)Overlaying the three services of carbon sequestration,water yield,and soil conservation in vegetation ecosystems,it was found that there were fewer changes in the spatial distribution of the integrated hotspot areas and significant changes in the spatial distribution of the cold spot areas during 2000~2020.The integrated hotspot areas(with 99%confidence level,95%confidence level,and 90%confidence level)were mainly distributed in Xishuangbanna,Pu'er,Lincang and,Dehong,among which the extreme hotspot areas(with 99%confidence level)were most significantly distributed in Xishuangbanna.The results of this study could contribute to improving the carbon sequestration capacity of vegetation and optimizing the spatial pattern of ecosystem services.