Patterns of Understory Diversity in Mixed Coniferous Forests of Southern California Impacted by Air Pollution
The forests of the San Bernardino Mountains have been subject to ozone and nitrogen (N) deposition for some 60 years. Much work has been done to assess the impacts of these pollutants on trees, but little is known about how the diverse understory flora has fared. Understory vegetation has declined i...
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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.2007.72 |
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| author | Edith B. Allen Patrick J. Temple Andrzej Bytnerowicz Michael J. Arbaugh Abby G. Sirulnik Leela E. Rao |
| author_facet | Edith B. Allen Patrick J. Temple Andrzej Bytnerowicz Michael J. Arbaugh Abby G. Sirulnik Leela E. Rao |
| author_sort | Edith B. Allen |
| collection | DOAJ |
| description | The forests of the San Bernardino Mountains have been subject to ozone and nitrogen (N) deposition for some 60 years. Much work has been done to assess the impacts of these pollutants on trees, but little is known about how the diverse understory flora has fared. Understory vegetation has declined in diversity in response to elevated N in the eastern U.S. and Europe. Six sites along an ozone and N deposition gradient that had been part of a long-term study on response of plants to air pollution beginning in 1973 were resampled in 2003. Historic ozone data and leaf injury scores confirmed the gradient. Present-day ozone levels were almost half of these, and recent atmospheric N pollution concentrations confirmed the continued air pollution gradient. Both total and extractable soil N were higher in sites on the western end of the gradient closer to the urban source of pollution, pH was lower, and soil carbon (C) and litter were higher. The gradient also had decreasing precipitation and increasing elevation from west to east. However, the dominant tree species were the same across the gradient. |
| format | Article |
| id | doaj-art-4ee50c25220d4ca2993fccab29a16703 |
| 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-4ee50c25220d4ca2993fccab29a167032025-02-03T01:03:04ZengWileyThe Scientific World Journal1537-744X2007-01-01724726310.1100/tsw.2007.72Patterns of Understory Diversity in Mixed Coniferous Forests of Southern California Impacted by Air PollutionEdith B. Allen0Patrick J. Temple1Andrzej Bytnerowicz2Michael J. Arbaugh3Abby G. Sirulnik4Leela E. Rao5Department of Botany and Plant Sciences and Center for Conservation Biology, University of California, Riverside, CA, USAUSDA Forest Service, Pacific Southwest Research Station, Riverside, CA, USAUSDA Forest Service, Pacific Southwest Research Station, Riverside, CA, USAUSDA Forest Service, Pacific Southwest Research Station, Riverside, CA, USADepartment of Botany and Plant Sciences and Center for Conservation Biology, University of California, Riverside, CA, USADepartment of Environmental Sciences, University of California, Riverside, CA, USAThe forests of the San Bernardino Mountains have been subject to ozone and nitrogen (N) deposition for some 60 years. Much work has been done to assess the impacts of these pollutants on trees, but little is known about how the diverse understory flora has fared. Understory vegetation has declined in diversity in response to elevated N in the eastern U.S. and Europe. Six sites along an ozone and N deposition gradient that had been part of a long-term study on response of plants to air pollution beginning in 1973 were resampled in 2003. Historic ozone data and leaf injury scores confirmed the gradient. Present-day ozone levels were almost half of these, and recent atmospheric N pollution concentrations confirmed the continued air pollution gradient. Both total and extractable soil N were higher in sites on the western end of the gradient closer to the urban source of pollution, pH was lower, and soil carbon (C) and litter were higher. The gradient also had decreasing precipitation and increasing elevation from west to east. However, the dominant tree species were the same across the gradient.http://dx.doi.org/10.1100/tsw.2007.72 |
| spellingShingle | Edith B. Allen Patrick J. Temple Andrzej Bytnerowicz Michael J. Arbaugh Abby G. Sirulnik Leela E. Rao Patterns of Understory Diversity in Mixed Coniferous Forests of Southern California Impacted by Air Pollution The Scientific World Journal |
| title | Patterns of Understory Diversity in Mixed Coniferous Forests of Southern California Impacted by Air Pollution |
| title_full | Patterns of Understory Diversity in Mixed Coniferous Forests of Southern California Impacted by Air Pollution |
| title_fullStr | Patterns of Understory Diversity in Mixed Coniferous Forests of Southern California Impacted by Air Pollution |
| title_full_unstemmed | Patterns of Understory Diversity in Mixed Coniferous Forests of Southern California Impacted by Air Pollution |
| title_short | Patterns of Understory Diversity in Mixed Coniferous Forests of Southern California Impacted by Air Pollution |
| title_sort | patterns of understory diversity in mixed coniferous forests of southern california impacted by air pollution |
| url | http://dx.doi.org/10.1100/tsw.2007.72 |
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