Nitrogen and phosphorus concentrations in forest streams of the United States

Dan Binkley, George G. Ice, Jason Philip Kaye, Christopher A. Williams

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

Seventy to eighty percent of the water flowing in rivers in the United States originates as precipitation in forests. This project developed a synoptic picture of the patterns in water chemistry for over 300 streams in small, forested watersheds across the United States. Nitrate (NO 3 - ) concentrations averaged 0.31 mg N/L, with some streams averaging ten times this level. Nitrate concentrations tended to be higher in the northeastern United States in watersheds dominated by hardwood forests (especially hardwoods other than oaks) and in recently harvested watersheds. Concentrations of dissolved organic N (mean 0.32 mg N/L) were similar to those of NO 3 - , whereas ammonium (NH 4 + ) concentrations were much lower (mean 0.05 mg N/L). Nitrate dominated the N loads of streams draining hardwood forests, whereas dissolved organic N dominated the streams in coniferous forests. Concentrations of inorganic phosphate were typically much lower (mean 12 mg P/L) than dissolved organic phosphate (mean 84 mg P/L). The frequencies of chemical concentrations in streams in small, forested watersheds showed more streams with higher NO 3 - concentrations than the streams used in national monitoring programs of larger, mostly forested watersheds. At a local scale, no trend in nitrate concentration with stream order or basin size was consistent across studies.

Original languageEnglish (US)
Pages (from-to)1277-1291
Number of pages15
JournalJournal of the American Water Resources Association
Volume40
Issue number5
DOIs
StatePublished - Jan 1 2004

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phosphorus
nitrogen
watershed
nitrate
phosphate (organic)
phosphate (inorganic)
coniferous forest
water chemistry
ammonium
monitoring
basin
river

All Science Journal Classification (ASJC) codes

  • Ecology
  • Water Science and Technology
  • Earth-Surface Processes

Cite this

Binkley, Dan ; Ice, George G. ; Kaye, Jason Philip ; Williams, Christopher A. / Nitrogen and phosphorus concentrations in forest streams of the United States. In: Journal of the American Water Resources Association. 2004 ; Vol. 40, No. 5. pp. 1277-1291.
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Nitrogen and phosphorus concentrations in forest streams of the United States. / Binkley, Dan; Ice, George G.; Kaye, Jason Philip; Williams, Christopher A.

In: Journal of the American Water Resources Association, Vol. 40, No. 5, 01.01.2004, p. 1277-1291.

Research output: Contribution to journalArticle

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