Holocene ecological evolution of Tengchong Qinghai Lake responses to climate changes and human activities in Yunnan,southwestern China  

作　　者：Enlou ZHANG Wenxiu ZHENG Yanmin CAO Zhenyu NI Yanjie ZHAO Weiwei SUN 

机构地区：[1]Key Laboratory of Lake and Watershed Science for Water Security,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China [2]University of Chinese Academy of Sciences,Nanjing 211135,China [3]College of Urban and Environmental Sciences,Hubei Normal University,Huangshi 435002,China [4]College of Resources and Environment,South-Central Minzu University,Wuhan 430074,China

出　　处：《Science China Earth Sciences》2025年第2期498-508,共11页中国科学(地球科学英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.42025707 and 42488201);the National Key Research and Development Program of China(Grant No.2022YFF0801104);the State Key Laboratory of Lake Science and Environment(Grant No.2022SKL001)。

摘　　要：Holocene climate change's impact on ecosystems has attracted considerable interest.Although human activities increasingly influenced ecosystems during the Holocene,many paleo-records primarily reconstruct natural environmental changes,often neglecting the pre-instrumental human influenceon ecological responses.To understand ecosystem responses comprehensively,it is essential to consider anthropogenic impacts alongside natural factors.Here,we present a Holocene chironomid record from Qinghai Crater Lake in Tengchong,southwestern China,examining the timing and magnitude of natural and anthropogenic impacts on the lake ecosystem throughout the Holocene.Our results reveal that early to midHolocene chironomid communities,especially in terms of species richness,were mainly driven by rising summer temperatures associated with increased solar radiation.By the late-Holocene,the weakening Indian Summer Monsoon led to fluctuating lake levels and intensified human impacts,impacting both chironomid species richness and community stability.Around 0.8 ka BP,enhanced human disturbances shifted the chironomid community composition from mesotrophic taxa dominance(e.g.,Cladotanytasus,Macropelopia)to eutrophic taxa dominance(e.g.,Chironomus,Polypedilum).Over the past few centuries,human influence has further increased chironomid species richness but has led to declining community stability.

关 键 词：HOLOCENE Chironomid community Climate change Human impact Ecological response Qinghai Crater Lake 

分 类 号：P534.632[天文地球—第四纪地质学] P467[天文地球—古生物学与地层学]