Cladophora as ecological engineer:A new test from the largest lake of Qinghai-Tibet plateau with filamentous algal blooms  

作　　者：Zhihua Wu Xigong Yuan Xiong Xiong Hongyi Ao Chenxi Wu Guoxiang Liu Huan Zhu 

机构地区：[1]Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan,430072,China [2]College of Science,Tibet University,Lhasa,850001,China [3]Huaihe River Commission of the Ministry of Water Resources,Bengbu,233001,China

出　　处：《Water Biology and Security》2024年第1期46-52,共7页水生生物与安全（英文）

基　　金：the National Natural Science Foundation of China(U22A20454);the Second Tibetan Plateau Scientific Expedition and Research program(Grant No.2019QZKK0304).

摘　　要：Filamentous algae blooms(FABs)have been increasing globally in recent years,and their presence can have both harmful and beneficial effects on aquatic ecosystems.As one of the most common FABs,Cladophora blooms have been reported in the lakes of the Qinghai-Tibet Plateau during the past few years.However,there have been few studies focused on how FABs impact other aquatic organisms,especially in alpine lakes since these are at the forefront of responding to global climate change.In this study,the phytoplankton communities in different regions of Qinghai Lake were profiled in different seasons using meta-barcode sequencing.The phytoplankton assemblages in areas with Cladophora blooms were compared to those without Cladophora.The phytoplankton community structure correlated with physicochemical properties including water temperature,electrical conductivity,nitrate,and the presence or absence of Cladophora blooms.The relative abundance of Bacillariophytes was found to be higher in zones with Cladophora blooms than in other regions.Significant seasonal changes in phytoplankton biomass andβdiversity were observed in zones with Cladophora blooms.Growth and microbial degradation of Cladophora can change the pH,dissolved oxygen,secchi depth,and nitrate.Together with seasonal temperature and electrical conductivity changes,Cladophora growth can significantly impact the phytoplankton biomass,community dissimilarity and assembly process.These results showed that Cladophora plays a key role in littoral aquatic ecosystem ecology.

关 键 词：Filamentous algal blooms Qinghai lake BIODIVERSITY Phytoplankton community Assembly processes Environmental drivers 

分 类 号：Q178.1[生物学—水生生物学] Q94[生物学—普通生物学]