Smog Nitrogen and the Rapid Acidification of Forest Soil, San Bernardino Mountains, Southern California
We report the rapid acidification of forest soils in the San Bernardino Mountains of southern California. After 30 years, soil to a depth of 25 cm has decreased from a pH (measured in 0.01 M CaCl2) of 4.8 to 3.1. At the 50-cm depth, it has changed from a pH of 4.8 to 4.2. We attribute this rapid cha...
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| Format: | Article |
| Language: | English |
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Wiley
2007-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1100/tsw.2007.74 |
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| author | Yvonne A. Wood Mark Fenn Thomas Meixner Peter J. Shouse Joan Breiner Edith Allen Laosheng Wu |
| author_facet | Yvonne A. Wood Mark Fenn Thomas Meixner Peter J. Shouse Joan Breiner Edith Allen Laosheng Wu |
| author_sort | Yvonne A. Wood |
| collection | DOAJ |
| description | We report the rapid acidification of forest soils in the San Bernardino Mountains of southern California. After 30 years, soil to a depth of 25 cm has decreased from a pH (measured in 0.01 M CaCl2) of 4.8 to 3.1. At the 50-cm depth, it has changed from a pH of 4.8 to 4.2. We attribute this rapid change in soil reactivity to very high rates of anthropogenic atmospheric nitrogen (N) added to the soil surface (72 kg ha–1 year–1) from wet, dry, and fog deposition under a Mediterranean climate. Our research suggests that a soil textural discontinuity, related to a buried ancient landsurface, contributes to this rapid acidification by controlling the spatial and temporal movement of precipitation into the landsurface. As a result, the depth to which dissolved anthropogenic N as nitrate (NO3) is leached early in the winter wet season is limited to within the top ~130 cm of soil where it accumulates and increases soil acidity. |
| format | Article |
| id | doaj-art-4ba229376ca8403296ad39a309b0a0b7 |
| institution | Kabale University |
| issn | 1537-744X |
| language | English |
| publishDate | 2007-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-4ba229376ca8403296ad39a309b0a0b72025-02-03T06:01:34ZengWileyThe Scientific World Journal1537-744X2007-01-01717518010.1100/tsw.2007.74Smog Nitrogen and the Rapid Acidification of Forest Soil, San Bernardino Mountains, Southern CaliforniaYvonne A. Wood0Mark Fenn1Thomas Meixner2Peter J. Shouse3Joan Breiner4Edith Allen5Laosheng Wu6Department of Environmental Sciences, University of California, Riverside, CA, USAUSDA Forest Service, Pacific Southwest Research Station, Riverside, CA, USADepartment of Hydrology and Water Resources, University of Arizona, Tucson, AZ, USAUSDA-ARS George E. Brown, Jr. Salinity Laboratory, Riverside, CA, USAUSDA Forest Service, Pacific Southwest Research Station, Riverside, CA, USADepartment of Botany and Plant Sciences, University of California, Riverside, CA, USADepartment of Environmental Sciences, University of California, Riverside, CA, USAWe report the rapid acidification of forest soils in the San Bernardino Mountains of southern California. After 30 years, soil to a depth of 25 cm has decreased from a pH (measured in 0.01 M CaCl2) of 4.8 to 3.1. At the 50-cm depth, it has changed from a pH of 4.8 to 4.2. We attribute this rapid change in soil reactivity to very high rates of anthropogenic atmospheric nitrogen (N) added to the soil surface (72 kg ha–1 year–1) from wet, dry, and fog deposition under a Mediterranean climate. Our research suggests that a soil textural discontinuity, related to a buried ancient landsurface, contributes to this rapid acidification by controlling the spatial and temporal movement of precipitation into the landsurface. As a result, the depth to which dissolved anthropogenic N as nitrate (NO3) is leached early in the winter wet season is limited to within the top ~130 cm of soil where it accumulates and increases soil acidity.http://dx.doi.org/10.1100/tsw.2007.74 |
| spellingShingle | Yvonne A. Wood Mark Fenn Thomas Meixner Peter J. Shouse Joan Breiner Edith Allen Laosheng Wu Smog Nitrogen and the Rapid Acidification of Forest Soil, San Bernardino Mountains, Southern California The Scientific World Journal |
| title | Smog Nitrogen and the Rapid Acidification of Forest Soil, San Bernardino Mountains, Southern California |
| title_full | Smog Nitrogen and the Rapid Acidification of Forest Soil, San Bernardino Mountains, Southern California |
| title_fullStr | Smog Nitrogen and the Rapid Acidification of Forest Soil, San Bernardino Mountains, Southern California |
| title_full_unstemmed | Smog Nitrogen and the Rapid Acidification of Forest Soil, San Bernardino Mountains, Southern California |
| title_short | Smog Nitrogen and the Rapid Acidification of Forest Soil, San Bernardino Mountains, Southern California |
| title_sort | smog nitrogen and the rapid acidification of forest soil san bernardino mountains southern california |
| url | http://dx.doi.org/10.1100/tsw.2007.74 |
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