Input-output Budgets of Inorganic Nitrogen for 24 Forest Watersheds in the Northeastern United States: a Review
Campbell JL, Hornbeck JW, Mitchell MJ, Adams MB, Castro MS, Driscoll CT, Kahl JS, Kochenderfer JN, Likens GE, Murdoch PS, Nelson SJ, Shanley JB. 2004. Input-output Budgets of Inorganic Nitrogen for 24 Forest Watersheds in the Northeastern United States: a Review. Water, Air, & Soil Pollution. 151:373-396
Following taken from abstract: "Input-output budgets for dissolved inorganic nitrogen (DIN) are summarized for 24 small watersheds at 15 locations in the northeastern United States. The study watersheds are completely forested, free of recent physical disturbances, and span a geographical region bounded by West Virginia on the south and west, and Maine on the north and east. Total N budgets are not presented; however, fluxes of inorganic N in precipitation and streamwater dominate inputs and outputs of N at these watersheds. The range in inputs of DIN in wet-only precipitation from nearby National Atmospheric Deposition Program (NADP) sites was 2.7 to 8.1 kg N ha−1 yr−1 (mean = 6.4 kg N ha−1 yr−1;median = 7.0 kg N ha−1 yr−1). Outputs of DIN in streamwater ranged from 0.1 to 5.7 kg N ha−1 yr−1 (mean = 2.0 kg N ha−1 yr−1; median = 1.7 kg N ha−1 yr−1). Precipitation inputs of DIN exceeded outputs in streamwater at all watersheds, with net retention of DIN ranging from 1.2 to 7.3 kg N ha−1 yr−1 (mean = 4.4 kg N ha−1 yr−1; median = 4.6 kg N ha−1 yr−1). Outputs of DIN in streamwater were predominantly NO3-N (mean = 89%; median = 94%). Wet deposition of DIN was not significantly related to DIN outputs in streamwater for these watersheds. Watershed characteristics such as hydrology, vegetation type, and land-use history affect DIN losses and may mask any relationship between inputs and outputs. Consequently, these factors need to be included in the development of indices and simulation models for predicting ‘nitrogen saturation’ and other ecological processes." /STUDY LOCATIONS:/ /MOUNT DESERT ISLAND/Cadillac Brook /Hadlock Brook/
- Type
- Journal Article
- Authors
- Campbell, John; Hornbeck, James; Mitchell, Myron; Adams, Mary; Castro, Mark; Driscoll, Charles; Kahl, Jeffrey; Kochenderfer, James; Likens, Gene; Murdoch, Peter; Nelson, Sarah; Shanley, James
- Units
- ACAD
- Keywords
- Cadillac Brook, climate change., Hadlock Brook, Hydrology, Land Use, Mount Desert Island, Nitrogen (N), Precipitation, Rivers & Streams, Vegetation, Vegetation Types, Water Quality, water resouces, Watersheds, Wet Deposition