Dynamic Changes of Marsh Wetland Resources in Yunnan Province
Based on the monitoring data of wetland resources in Yunnan Province,the dynamic degree and relative change rate model was used to systematically analyze the area,spatial distribution character-istics and influencing factors of marsh wetlands in Yunnan Province from 2001 to 2021.The results showed that compared with 2001,the marsh area increased rapidly in 2012,with an increment of 28300 hm2;from 2012 to 2021,the area of marsh wetland showed a trend of fluctuating increase,with an incre-ment of 83.6684 million hm2.However,the variation trend of marsh wetland types was different.The are-a of herb marsh increased by 4 309.58 hm2,shrub marsh by 1 099.80 hm2 and forest marsh by 4 179.52 hm2,fresh water spring increased by 1.83 hm2,and swamp meadow decreased by 1 223.89 hm2;in terms of spatial distribution,the wetland area of Hengduan Mountains plateau in western and northwestern Yunnan,the wet area of lake basin in central and eastern Yunnan plateau,and the wet area of river and lake in moderately high mountain in southern Yunnan all showed an increasing trend during this period.During this period,the wetland area in northeast Yunnan,the karst mountain lake and river wet area in southeast Yunnan,and the middle and low mountain and wide valley river and lake wet area in southwest Yunnan all showed a decreasing trend,and the variation trend was different among the wet areas.The change of wetland resources was mainly related to human factors and natural factors.
marsh wetlandsdynamic changes of resourcesspatial distribution characteristicsdynamic degreerelative rate of changeYunnan Province
NETL
NSTL
万方数据
