Skip to main content

Sedimentary record of nutrients and sources of organic matter in the Shuanglong reservoir, Dianchi watershed, China

Abstract

In the last few decades, the eutrophication of lakes has been a serious issue in the middle and lower reaches of the Yangtze River watershed. To explore the relationship between lake systems and anthropogenic activities, sediments were collected from the Shuanglong reservoir in the Dianchi watershed in Southwest China. Total nitrogen (TN), total phosphorus (TP), total organic carbon (TOC), and the carbon isotopic ratio (δ13C) were analyzed in sediment cores to reconstruct the effects of natural succession and human activities on the past lacustrine environmental conditions. A reliable chronology of the sediment core was established by using the 210Pb dating technique, which indicated that the age span of the 70-cm sediment core is from the years 1871 to 2011. Above – 31 cm depth in the core, TN, TP, TOC, C/N, and δ13C increased significantly, indicating that eutrophication has occurred since the 1980s. By combining the indicators of δ13C and C/N, it was shown that terrestrial and lacustrine components were the main sources of organic matter (OM) in the reservoir, which was mostly controlled by terrestrial C3 plants and algae. Since the 1980s, increased sewage discharge, fish aquaculture, fertilizer application, population, and economic strength have sped up the eutrophication process, and the eutrophication was further intensified in 2001.

Graphical abstract

This is a preview of subscription content, access via your institution.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8

References

Download references

Funding

This work was supported by the National Natural Science Foundation of China (Grant Nos. 41703099, 41030751, and 41673108) and the doctoral scientific research funds of the Shandong University of Technology (No. 415054).

Author information

Affiliations

Authors

Contributions

Conceptualization, Hao Yang; methodology, Shanshan Wu; investigation, Yongping Wang and Haowei Teng; supervision, Aiju Liu; writing—original draft preparation, Zike Zhou; writing—review and editing, Xiaoyin Niu.

Corresponding author

Correspondence to Xiaoyin Niu.

Ethics declarations

Conflict of interest

The authors declare that they have no conflict of interest and consent to participate and publish.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Additional information

Publisher’s note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Highlights

• TN, TP, TOC, C/N, and δ13C were used as natural tracers of erosion sources.

• The combination of δ13C and C/N can identify the sources of organic matter more accurately.

•Sedimentary organic matter is mainly derived from terrestrial C3 plants and algae.

• Since the 1980s, early eutrophication may have occurred due to human activities.

Responsible Editor: Philippe Garrigues

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Zhou, Z., Wang, Y., Yang, H. et al. Sedimentary record of nutrients and sources of organic matter in the Shuanglong reservoir, Dianchi watershed, China. Environ Sci Pollut Res 28, 17763–17774 (2021). https://doi.org/10.1007/s11356-020-12085-0

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11356-020-12085-0

Keywords

  • Sediment
  • Organic matter
  • Source
  • Geochronology
  • Anthropogenic activities
  • Eutrophication