Assessment of Biological and Environmental Phenology at a Landscape Level from 30 Years of Fixed-Date Repeat Photography in Northern Sweden
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A 30-year series (1978–2007) of photographic records were analysed to determine changes in lake ice cover, local (low elevation) and montane (high elevation) snow cover and phenological stages of mountain birch (Betula pubescens ssp. czerepanovii) at the Abisko Scientific Research Station, Sweden. In most cases, the photographic-derived data showed no significant difference in phenophase score from manually observed field records from the same period, demonstrating the accuracy and potential of using weekly repeat photography as a quicker, cheaper and more adaptable tool to remotely study phenology in both biological and physical systems. Overall, increases in ambient temperatures coupled with decreases in winter ice and snow cover, and earlier occurrence of birch foliage, signal a reduction in the length of winter, a shift towards earlier springs and an increase in the length of available growing season in the Swedish sub-arctic.
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- Assessment of Biological and Environmental Phenology at a Landscape Level from 30 Years of Fixed-Date Repeat Photography in Northern Sweden
Volume 40, Issue 6 , pp 600-609
- Cover Date
- Print ISSN
- Online ISSN
- Springer Netherlands
- Additional Links
- Lake ice
- Mountain birch
- Snow cover
- Swedish sub-arctic
- Author Affiliations
- 1. Centre for Ecology & Hydrology, Penicuik, EH26 0QB, UK
- 2. Royal Swedish Academy of Sciences, Lilla Frescativägen 4 A, 114 18, Stockholm, Sweden
- 3. Department of Animal and Plant Sciences, University of Sheffield, Sheffield, S10 2TN, UK