caa a22 4500 445300655 CHVBK 20180317142556.0 cr unu---uuuuu 170323e20100801xx s 000 0 eng 10.1007/s11430-010-3066-4 doi (NATIONALLICENCE)springer-10.1007/s11430-010-3066-4 Geochronology of recent lake sediments from Longgan Lake, middle reach of the Yangtze River, influenced by disturbance of human activities [Elektronische Daten] [YanHong Wu, EnFeng Liu, HaiJian Bing, XiangDong Yang, Bin Xue, WeiLan Xia] The impacts of human activities in Longgan Lake region on the distribution of 210Pb in lake sediment made it difficult to establish geochronological sequence. However, environmental proxies recorded these human activities and could be used as time marker to check 210Pb dating results. Based on the analysis of 210Pbexc distribution in cores LS-1 and LGL-1, and in combination with the human activities records in grain-size and element concentration, the sedimentation rates in the upper layers of these two cores were determined to be 0.19 and 0.23 cm/a respectively. The MAR (mass accumulation rates) of these two cores demonstrated that natural condition, such as precipitation and runoffs, led to the variation of MAR before human disturbance, and human activities controlled the sedimentary processes afterwards, which obviously reduced the particles influx into the lakes. During 1940s when human activity had not changed the water system within the catchment, 210Pb activity was abnormally strong in lakes along middle to lower reaches of the Yangtze River, which might be attributed to less precipitation and can be used as a time marker for geochronological research. Science China Press and Springer-Verlag Berlin Heidelberg, 2010 210Pb nationallicence geochronology nationallicence environmental index nationallicence human activity nationallicence Longgan Lake nationallicence Wu YanHong State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008, Nanjing, China aut Liu EnFeng State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008, Nanjing, China aut Bing HaiJian State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008, Nanjing, China aut Yang XiangDong State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008, Nanjing, China aut Xue Bin State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008, Nanjing, China aut Xia WeiLan State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008, Nanjing, China aut Science China Earth Sciences SP Science China Press 53/8(2010-08-01), 1188-1194 1674-7313 53:8<1188 2010 53 11430 https://doi.org/10.1007/s11430-010-3066-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11430-010-3066-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wu YanHong State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Liu EnFeng State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Bing HaiJian State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Yang XiangDong State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Xue Bin State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Xia WeiLan State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 773 0- Science China Earth Sciences SP Science China Press 53/8(2010-08-01), 1188-1194 1674-7313 53:8<1188 2010 53 11430 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer