High tolerance of subalpine grassland to long-term ozone exposure is independent of N input and climatic drivers
Volk, M; Wolff, V; Bassin, S; Ammann, C; Fuhrer, J
HERO ID
2462169
Reference Type
Journal Article
Year
2014
Language
English
PMID
| HERO ID | 2462169 |
|---|---|
| In Press | No |
| Year | 2014 |
| Title | High tolerance of subalpine grassland to long-term ozone exposure is independent of N input and climatic drivers |
| Authors | Volk, M; Wolff, V; Bassin, S; Ammann, C; Fuhrer, J |
| Journal | Environmental Pollution |
| Volume | 189 |
| Page Numbers | 161-168 |
| Abstract | In a seven-year study, we tested effects of increased N and O-3 deposition and climatic conditions on biomass of subalpine grassland. Ozone risk was assessed as exposure (AOT40) and as stomatal flux (POD0,1). We hypothesized that productivity is higher under N- and lower under O-3 deposition, with interactions with climatic conditions. <br> <br>Aboveground biomass was best correlated with growing-degree days for May (GDD(May)). Nitrogen deposition increased biomass up to 60% in the highest treatment, and 30% in the lowest addition. Also belowground biomass showed a positive N-response. Ozone enrichment had no effect on biomass, and no interaction between O-3 and N was observed. Growth response to N deposition was not correlated to GDD(May) or precipitation, but indicated a cumulative effect over time. <br> <br>Productivity of subalpine grassland is tolerant to increasing ozone exposure, independent of N input and climatic drivers. N deposition rates at current critical loads, strongly increase the grassland yield. (C) 2014 Elsevier Ltd. All rights reserved. |
| Doi | 10.1016/j.envpol.2014.02.032 |
| Pmid | 24662002 |
| Wosid | WOS:000336466900021 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Keyword | Air pollution; Nitrogen; Critical load/level; Phytotoxic ozone dose POD; Productivity |