PMID: 18186341Jan 12, 2008Paper

Estimating ecological thresholds for phosphorus in the Everglades

Environmental Science & Technology
Curtis J RichardsonCraig A Stow

Abstract

The Florida Everglades, a wetland of international importance, has been undergoing a significant shift in its native flora and fauna due to excessive total phosphorus (TP) loadings (an average of 147 t per annum from 1995to 2004) and an elevated mean TP concentration (69 microg L(-1) of TP in 2004) from agricultural runoff and Lake Okeechobee outflow despite the use of 16000 ha of stormwater treatment areas. Here, we present a Bayesian changepoint analysis of long-term experimental research and show that exceeding a surface water geometric mean TP threshold concentration of 15 microg L(-1) causes an ecological imbalance in algal, macrophyte, and macroinvertebrate assemblages as well as slough community structure. A phosphorus threshold for all trophic levels may be more realistic and protective when presented as a threshold zone (12-15 microg L(-1)) because estimates of uncertainty must be utilized to accurately define TP thresholds, which change with seasons and water depths. Most interior areas of the Everglades are currently at or below this threshold zone, but the exterior areas near inflow structures (except for the Everglades National Park) are presently receiving double or triple the proposed threshold. Our Bayesian appr...Continue Reading

References

Sep 22, 2001·Science·S L PimmD Wilcove
Nov 22, 2007·Ecology·Song S Qian, Zehao Shen
Aug 1, 1993·Ecological Applications : a Publication of the Ecological Society of America·C B Craft, C J Richardson

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Citations

Mar 22, 2008·Journal of Zhejiang University. Science. B·Xiao-e YangZhen-li He
Nov 12, 2010·Journal of Environmental Monitoring : JEM·Yirgalem ChebudRosanna Rivero
Aug 6, 2017·Environmental Management·Hilary FlowerCarl Fitz
Jan 3, 2018·Journal of Environmental Quality·Carl H BolsterDeanna Osmond
Nov 13, 2013·Journal of Environmental Quality·Carl H Bolster, Peter A Vadas
Jan 6, 2012·Journal of Environmental Quality·Patricia A ChambersGlenn A Benoy
Aug 21, 2020·Environmental Science and Pollution Research International·Kiran KrishnaShanta Nair
Feb 1, 2021·Environmental Science and Pollution Research International·Hailu Sheferaw Ayele, Minaleshewa Atlabachew
Sep 20, 2008·Environmental Science & Technology·Evelyn E GaiserSusan Newman
May 21, 2021·Journal of Colloid and Interface Science·Yu-Yi ShenChia-Hung Hou

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