The Impact of Climate on Flowering in the High Arctic—The Case ofDryasin a Hybrid Zone
| Autor: | Marianne Philipp, Toke T. Høye, Susanne Mølgaard Ellebjerg |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Arctic, Antarctic, and Alpine Research. 39:412-421 |
| ISSN: | 1938-4246 1523-0430 |
| DOI: | 10.1657/1523-0430(06-018)[hoye]2.0.co;2 |
| Popis: | The extreme seasonality of the High Arctic creates very different flowering conditions for plants in areas of early and late snowmelt. Therefore, future reproductive responses to climate change may be dependent on the timing of snowmelt. We combined genetic, morphological, and long-term monitoring data on Dryas from a High Arctic hybrid zone of D. integrifolia and D. octopetala to assess whether climate variation influenced flowering differently in areas of early and late snowmelt, and whether this could have a genetic origin. We found a non-linear relationship between timing of snowmelt and flowering. The duration of the period between snowmelt and the onset of flowering (pre-floration interval) varied with the date of snowmelt. Shorter pre-floration intervals were associated with warmer average temperature during the pre-floration intervals in both early and late melting plots. However, the pre-floration interval was much shorter in early than in late plots at the same average temperature. Like... |
| Databáze: | OpenAIRE |
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