Sedimentary geochemical record of human-induced environmental changes in Huanggaihu Lake in the middle reach of the Yangtze River, China

  • Shuchun Yao | shchyao@niglas.ac.cn Chinese Academy of Sciences, China.
  • Bin Xue Chinese Academy of Sciences, China.

Abstract

Total organic carbon (TOC), total nitrogen (TN), total phosphorus (TP) and heavy metals were determined along with stable isotope ratios of carbon and nitrogen (δ13Corg and δ15N) in an 86 cm sediment core from Huanggaihu Lake, located in the middle reach of the Yangtze River, China. These geochemical and isotopic records provide a continuous history of lake productivity and the trophic state of Huanggaihu Lake over the past 150 years. Before the 1960s, organic matter, nutrients and heavy metal contents were low, revealing the low trophic state and pollution inputs at Huanggaihu Lake. High sediment mass accumulation rates and low clay content suggested increased catchment erosion related to human activities such as railway construction and forest clearing during the 1910s-1940s in the catchment area. Since the 1960s, TOC, TN and δ15N have increased along with decreased δ13Corg, indicating an increase in the primary productivity of Huanggaihu Lake. After the year 2000, the TOC, TN and TP decreased or remained stable, and the δ13Corg and δ15N dropped slightly, indicating minor improvement in the lake’s water quality.

Dimensions

Altmetric

PlumX Metrics

Downloads

Download data is not yet available.

Author Biographies

Shuchun Yao, Chinese Academy of Sciences
State Key Lab of Lake Science and Environment, Nanjing Institute of Geography and Limnology
Bin Xue, Chinese Academy of Sciences
State Key Lab of Lake Science and Environment, Nanjing Institute of Geography and Limnology
Published
2014-07-07
Info
Issue
Section
Original Articles
Supporting Agencies
National Basic Science and Technology Special Project, Chinese National Science Foundation, CAS Strategic Priority Research Program.
Keywords:
Sediment, stable isotope, lake productivity, Lake Huanggaihu.
Statistics
  • Abstract views: 2219

  • PDF: 741
  • HTML: 589
How to Cite
1.
Yao S, Xue B. Sedimentary geochemical record of human-induced environmental changes in Huanggaihu Lake in the middle reach of the Yangtze River, China. J Limnol [Internet]. 2014Jul.7 [cited 2021May9];74(1). Available from: https://jlimnol.it/index.php/jlimnol/article/view/jlimnol.2014.957