The use of critical levels for determining plant response to ozone in europe and in North America
Musselman, RC; Lefohn, AS
| HERO ID | 199397 |
|---|---|
| In Press | No |
| Year | 2007 |
| Title | The use of critical levels for determining plant response to ozone in europe and in North America |
| Authors | Musselman, RC; Lefohn, AS |
| Journal | The Scientific World Journal |
| Volume | 7 |
| Page Numbers | 15-21 |
| Abstract | Critical levels to determine plant response to ozone (O-3) have been used in Europe since the 1980s, utilizing the concentration-based AOT40 to relate plant response to ambient O-3 exposure. More recently, there has been progress in Europe toward utilizing flux-based critical levels, because plant response is more closely related to O-3 uptake than to the amount of O-3 in ambient air. Flux-based critical levels are plant species specific; data for parameterization of flux-based critical levels models are lacking for most plant species. Although flux-based critical levels are now being used for a limited number of agricultural crops and tree species where data are available, the use of flux-based critical levels is limited by the lack of adequate consideration and incorporation of plant internal detoxification mechanisms in flux modeling. Critical levels have not been used in North America; however, recent interest in the U.S. and Canada for using critical loads for nitrogen and sulfur has generated interest in using critical levels for O-3. A major obstacle for utilization of critical levels in North America is that ambient air quality standards for O-3 in the U.S. and Canada are concentration based. It appears that cumulative exposure-based metrics, particularly when implemented with a quantification of peak concentrations and environmental variables, such as a drought index, are currently the most useful to relate O-3 to vegetation response. Because data are unavailable to quantify detoxification potential of vegetation, effective flux models are not available to determine plant response to O-3. |
| Doi | 10.1100/tsw.2007.24 |
| Pmid | 17450276 |
| Wosid | WOS:000245178400003 |
| Url | http://www.thescientificworld.co.uk/doi/getDoi.asp?doi=10.1100/tsw.2007.24 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | N1-MarN1-The use of critical levels for determining plant response to ozone in europe and in North AmericaN1-ISI:000245178400003N1-Musselman, Robert C. Lefohn, Allen S.AD-USDA Forest Serv, Rocky Mt Res Stn, Ft Collins, CO USA. ASL & Associates, Helena, MT USA. Musselman, RC, USDA Forest Serv, Rocky Mt Res Stn, Ft Collins, CO USA. rmusselman@fs.fed.usID - 1766 |
| Is Public | Yes |
| Keyword | AOT40; critical levels; detoxification; effective flux; flux; National; Ambient Air Quality Standards; ozone; SUM06; W126; Appalachian Mountains; stomatal conductance; nitrogen deposition; critical loads; vegetation; exposure; Colorado; standard; areas; flux |
| Is Qa | No |
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