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Twentieth century water quality trends in Minnesota lakes compared with presettlement variability

Dates

Year
2003

Citation

Ramstack, J. M., 2003, Twentieth century water quality trends in Minnesota lakes compared with presettlement variability: Canadian journal of fisheries and aquatic sciences, v. 61, no. 4, 561 p.

Summary

A diatom-based transfer function was used to reconstruct water chemistry before European settlement in 55 Minnesota lakes. The lakes span three natural ecoregions, which differ in their history of land use, as well as in surficial geology, climate, and vegetation. Postsettlement trends were compared with water chemistry change reconstructed from two presettlement core sections (circa 1750 and 1800) as a measure of natural variability. Presettlement water quality changes were generally small and nondirectional in all three ecoregions. In contrast, half of the urban lakes showed a statistically significant increase in chloride, whereas 30% of urban and 30% of agricultural region lakes record a statistically significant increase in total [...]

Contacts

Author :
Ramstack, J. M.

Attached Files

Communities

  • National and Regional Climate Adaptation Science Centers
  • Northeast CASC

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Identifiers

Type Scheme Key
ISSN http://sciencebase.gov/vocab/identifierScheme 0706-652X

Citation Extension

citationTypeJournal Article
journalCanadian journal of fisheries and aquatic sciences
parts
typePages
value561
typeVolume
value61
typeNumber
value4

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