Establishment of stream nutrient criteria by comparing reference conditions with ecological thresholds in a typical eutrophic lake basin

Environmental Science. Processes & Impacts
Xiaofeng CaoShengji Luan

Abstract

The establishment of numeric nutrient criteria is essential to aid the control of nutrient pollution and for protecting and restoring healthy ecological conditions. However, it's necessary to determine whether regional nutrient criteria can be defined in stream ecosystems with a poor ecological status. A database of periphytic diatom samples was collected in July and August 2011 and 2012. In total 172 samples were included in the database with matching environmental variables. Here, percentile estimates, nonparametric change-point analysis (nCPA) and Threshold Indicator Taxa ANalysis (TITAN) were conducted to detect the reference conditions and ecological thresholds along a total nitrogen (TN) and total phosphorus (TP) gradient and ammonia nitrogen (NH3-N) for the development of nutrient criteria in the streams of the Lake Dianchi basin. The results highlighted the possibility of establishing regional criteria for nutrient concentrations, which we recommended to be no more than 1.39 mg L-1 for TN, 0.04 mg L-1 for TP and 0.17 mg L-1 for NH3-N to prevent nuisance growths of tolerant taxa, and 0.38 mg L-1 for TN, 0.02 mg L-1 for TP and 0.02 mg L-1 for NH3-N to maintain high quality waters in streams. Additionally, the influence of...Continue Reading

References

Aug 7, 2003·Environmental Science & Technology·Richard A SmithGregory E Schwarz
Nov 26, 2009·Environmental Monitoring and Assessment·Yong-Hui YangCheng-Jie He
Jun 26, 2010·Environmental Monitoring and Assessment·Robert W BlackJill D Frankforter
Jan 6, 2012·Journal of Environmental Quality·Patricia A ChambersGlenn A Benoy
Dec 29, 2012·Proceedings of the National Academy of Sciences of the United States of America·Richard J PayneUNKNOWN BEGIN Partners
Oct 2, 2013·Environmental Science and Pollution Research International·Jiabo Chen, Jun Lu
Nov 13, 2013·Journal of Environmental Quality·M A Evans-WhiteJ T Scott
Apr 4, 2014·Environmental Science and Pollution Research International·Shouliang HuoFengchang Wu

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Methods Mentioned

BETA
environmental pressure
scraping

Software Mentioned

nCPA
Vegan
R
Threshold Indicator Taxa ANalysis ( TITAN
TITAN

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