Document Detail


Prediction of reference phosphorus concentrations in Swedish lakes.
MedLine Citation:
PMID:  23360552     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The relationship between total phosphorus (TP) and chemical, climatic, morphological and geographic variables was examined for over a thousand reference lakes across Sweden. A significant relationship was found between TP and both absorbance of irradiance (at 420 nm, filtered) and altitude for all lakes. These two variables alone, however, were not able to adequately predict TP concentrations in naturally turbid lakes. A natural particulate matter factor (PMn) was developed as part of this study to incorporate the effect of natural suspended matter on lake phosphorus concentration. Variability in TP concentration was well explained with the addition of PMn to the model (R2 = 0.71) even though conditions external and internal to the lakes varied greatly. The ability of the three parameter model to identify culturally eutrophic systems was then successfully tested using a dataset of lakes with known anthropogenic phosphorus loads. Thus, the model allows for estimation of reference TP concentration and by extension can be used to identify when a reference concentration has been exceeded due to anthropogenic P loading. The model output also provides a realistic endpoint to which phosphorus concentrations should be reduced to achieve a natural trophic state in both clear water and naturally turbid lakes.
Authors:
Brian J Huser; Jens Fölster
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-29
Journal Detail:
Title:  Environmental science & technology     Volume:  -     ISSN:  1520-5851     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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