The University of Southampton
University of Southampton Institutional Repository

Alternate trajectories in historic trophic change from two lakes in the same catchment, Huayang Basin, middle reach of Yangtze River, China

Zhang, Enlou, Cao, Yanmin, Langdon, Peter, Jones, Richard, Yang, Xiangdong and Shen, Ji (2012) Alternate trajectories in historic trophic change from two lakes in the same catchment, Huayang Basin, middle reach of Yangtze River, China Journal of Paleolimnology, 48, pp. 367-381. (doi:10.1007/s10933-012-9608-3).

Record type: Article


In order to assess how best to manage impacted lake systems, one needs to understand the trophic functioning of the lake system and the recent states through which the lake may have transitioned. Lakes in the middle and lower reaches of the Yangtze have been heavily impacted over recent decades. In order to understand recent changes in functional status, we examined sediment cores covering the last 120 years from two lakes in the same catchment with differing status: one algal-dominated (Taibai Lake) and the other macrophyte-dominated (Longgan Lake). Chironomid head capsules were identified from both sites and an expanded chironomid-total phosphorus (TP) transfer function (21 sites were added to the 30-lake model previously developed by Zhang et al. 2006) was used to assess the lakes’ response to recent anthropogenic change. Quantitative chironomid-inferred TP (CI-TP) reconstructions showed that Taibai Lake experienced clear changes in trophic status since the 1860s. Before the 1950s, the CI-TP concentration was relatively stable around 50–80 lg L-1, while it reached to 80–130 lg L-1 in the latter period. CI-TP for Longgan Lake, however, showed a relative decline from the range of 50–75 lg L-1 since the 1880s to 30–40 lg L-1 in recent years, accompanied by strong evidence from the chironomids for increased macrophyte biomass as TP levels declined. Both reconstructions agreed with diatom inferences of TP from the same lakes. The stark difference between these two sites is thought to reflect a function of macrophyte development, with Taibai Lake losing its plants through increased nutrient levels and internal recycling, whereas Longgan Lake, which is much bigger in area and hence potentially more resilient to change, was able to develop macrophyte communities over the same time period. The positive feedbacks associated with abundant macrophytes retained the clear water state of Longgan Lake, but a further increase in nutrients might lead to decrease in resilience of the relatively stable macrophyte state and loss of benthic pathways of primary production, which would push the lake towards eutrophication. Unless nutrient inputs to Longgan are controlled, Longgan Lake might lose macrophyte communities and follow a developmental pathway similar to that observed in Taibai Lake.

PDF Zhang_et_al_JoPL_2012.pdf - Version of Record
Restricted to Repository staff only
Download (699kB)

More information

Published date: 3 May 2012
Keywords: chironomids, eutrophication, total phosphorus, aquatic macrophytes, transfer functions
Organisations: Palaeoenvironment Laboratory (PLUS)


Local EPrints ID: 339661
ISSN: 0921-2728
PURE UUID: be29f700-4863-4173-9f99-61af5bf60037
ORCID for Peter Langdon: ORCID iD

Catalogue record

Date deposited: 29 May 2012 09:30
Last modified: 18 Jul 2017 05:53

Export record



Author: Enlou Zhang
Author: Yanmin Cao
Author: Peter Langdon ORCID iD
Author: Richard Jones
Author: Xiangdong Yang
Author: Ji Shen

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.