[Estimation of river nutrients thresholds based on benthic macroinvertebrate assemblages: a case study in the upper reaches of Xitiao Stream in Zhejiang, China].
Ying Yong Sheng Tai Xue Bao
; 21(2): 483-8, 2010 Feb.
Article
in Zh
| MEDLINE
| ID: mdl-20462024
ABSTRACT
Water eutrophication is a global problem, and one of the major environmental problems in China. At present, its studies in China are mainly focused on lakes and reservoirs, whereas a few on rivers. Based on the stress-response of benthic macroinvertebrate assemblages to water nutrients, we used the nonparametric deviance reduction (change point analysis) to compute the breakpoints of nutrients concentrations, in the upper reaches of Xitiao Stream in Zhejiang. The results indicated that the breakpoints of total nitrogen (TN) and total phosphors (TP) were 1.409 mg x L(-1) and 0.033-0.035 mg x L(-1), respectively. The TN and TP concentrations at reference sites were lower, while those at urban sewage- polluted sites were higher than the thresholds. In latter case, a serious degradation of benthic macroinvertebrates assemblages could be induced. To establish water nutrients criteria with relation to aquatic organisms would make the biological monitoring play a full role in water management, and provide scientific data to estimate the total maximum daily load (TMDL) of TN and TP in water body.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Phosphorus
/
Water Pollutants, Chemical
/
Environmental Monitoring
/
Invertebrates
/
Nitrogen
Limits:
Animals
Country/Region as subject:
Asia
Language:
Zh
Journal:
Ying Yong Sheng Tai Xue Bao
Journal subject:
SAUDE AMBIENTAL
Year:
2010
Document type:
Article
Affiliation country:
China