Dynamics of iron and aluminum storages in a subtropical forest headwater stream  

作　　者：YI Qiumeng MA Diting PENG Yan ZHAO Zemin YUAN Chaoxiang YUAN Ji NI Xiangyin WU Fuzhong YUE Kai AN Nannan 

机构地区：[1]Key Laboratory of Humid Subtropical Eco-geographical Processes of Ministry of Education,School of Geographical Sciences,Fujian Normal University,Fuzhou 350117,China [2]Fujian Sanming Forest Ecosystem National Observation and Research Station,Sanming 365002,China

出　　处：《Journal of Mountain Science》2024年第7期2193-2205,共13页山地科学学报（英文）

基　　金：financially supported by the National Natural Science Foundation of China(32271633);founded by the National Natural Science Foundation of China(32201342);Natural Science Foundation of Fujian Province(2022J01642);supported by the National Natural Science Foundation of China(32171641)。

摘　　要：The forest headwater streams are important hubs for connecting terrestrial and aquatic ecosystems,with plant litter and sediments as the major carriers for material migrations;however,until now we knew little about the dynamics of trace elements such as iron(Fe)and aluminum(Al)in forest headwater streams.Here,we quantitatively identified the spatiotemporal dynamics of Fe and Al storages in plant litter and sediments and their influencing factors in a subtropical forest headwater stream,and assessed the potential pollution risk.The results showed that:(1)the mean concentrations of Fe and Al in plant litter(sediments)were 5.48 and 8.46(7.39 and 47.47)g·kg^(-1),and the mean storages of Fe and Al in plant litter(sediments)were 0.26 and 0.43(749.04 and 5030.90)g·m^(-2),respectively;(2)the storages of Fe and Al in plant litter and sediments significantly fluctuated from January to December,and showed a decreasing pattern from the source to mouth;and(3)storages of Fe and Al had no significant correlation with riparian forest type and the present of tributary and the Fe and Al storages in plant litter were mainly affected by water temperature and water alkalinity,and their storages in sediments were mainly affected by water temperature and frequency of rainfall;and(4)there were no anthropogenic pollution in Fe and Al in the forest headwater stream.Our study revealed the primary factors of concentrations and storages of Fe and Al in plant litter and sediments in a forest headwater stream,which will improve our understanding of the role of headwater streams in forest nutrient storage and cycling along with hydrological processes.

关 键 词：Plant litter SEDIMENTS Storage Forest headwater stream Stream characteristics Trace element 

分 类 号：X143[环境科学与工程—环境科学]