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High Arctic plant phenology is determined by snowmelt patterns but duration of phenological periods is fixed: an example of periodicity

Semenchuk, Philipp R. and Gillespie, Mark A. K. and Rumpf, Sabine B. and Baggesen, Nanna and Elberling, Bo and Cooper, Elisabeth J.. (2016) High Arctic plant phenology is determined by snowmelt patterns but duration of phenological periods is fixed: an example of periodicity. ENVIRONMENTAL RESEARCH LETTERS, 11 (12). ARTN 125006.

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Official URL: https://edoc.unibas.ch/88421/

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Abstract

The duration of specific periods within a plant's life cycle are critical for plant growth and performance. In the High Arctic, the start of many of these phenological periods is determined by snowmelt date, which may change in a changing climate. It has been suggested that the end of these periods during late-season are triggered by external cues, such as day length, light quality or temperature, leading to the hypothesis that earlier or later snowmelt dates will lengthen or shorten the duration of these periods, respectively, and thereby affect plant performance. Wetested whether snowmelt date controls phenology and phenological period duration in High Arctic Svalbard using a melt timing gradient from natural and experimentally altered snow depths. Weinvestigated the response of early-and late-season phenophases from both vegetative and reproductive phenological periods of eight common species. Wefound that all phenophases follow snowmelt patterns, irrespective of timing of occurrence, vegetative or reproductive nature. Three of four phenological period durations based on these phenophases were fixed for most species, defining the studied species as periodic. Periodicity can thus be considered an evolutionary trait leading to disadvantages compared with aperiodic species and we conclude that the mesic and heath vegetation types in Svalbard are at risk of being outcompeted by invading, aperiodic species from milder biomes.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Integrative Biologie > ├ľkologie (Rumpf)
UniBasel Contributors:Rumpf, Sabine
Item Type:Article, refereed
Article Subtype:Research Article
ISSN:1748-9326
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:23 May 2022 12:15
Deposited On:23 May 2022 12:15

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