Thaw pond development and initial vegetation succession in experimental plots at a Siberian lowland tundra site
| Autor: | Frank Berendse, Trofim C. Maximov, Daan Blok, Bingxi Li, Monique M. P. D. Heijmans, Jacobus van Huissteden, Sergey V. Karsanaev, Peng Wang |
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| Přispěvatelé: | Earth and Climate |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Betula nana 010504 meteorology & atmospheric sciences ved/biology.organism_classification_rank.species Soil Science Plant Ecology and Nature Conservation Soil science Plant Science Permafrost 010603 evolutionary biology 01 natural sciences Shrub Thermokarst Vegetation dynamics Arctic tundra Thaw depth SDG 15 - Life on Land 0105 earth and related environmental sciences Hydrology geography WIMEK geography.geographical_feature_category Ecology biology ved/biology Permafrost degradation Subsidence (atmosphere) Vegetation biology.organism_classification Tundra Plantenecologie en Natuurbeheer Environmental science Environmental Sciences |
| Zdroj: | Plant and Soil, 420(1-2), 147-162 Plant and Soil 420 (2017) 1-2 Plant and Soil; 420(1-2), pp 147-162 (2017) Plant and Soil, 420(1-2), 147-162. Springer Netherlands Li, B, Heijmans, M M P D, Blok, D, Wang, G-P, Karsanaev, S V, Maximov, T C, van Huissteden, J & Berendse, F 2017, ' Thaw pond development and initial vegetation succession in experimental plots at a Siberian lowland tundra site ', Plant and Soil, vol. 420, no. 1-2, pp. 147-162 . https://doi.org/10.1007/s11104-017-3369-8 |
| ISSN: | 1573-5036 0032-079X |
| Popis: | Background and aims: Permafrost degradation has the potential to change the Arctic tundra landscape. We observed rapid local thawing of ice-rich permafrost resulting in thaw pond formation, which was triggered by removal of the shrub cover in a field experiment. This study aimed to examine the rate of permafrost thaw and the initial vegetation succession after the permafrost collapse. Methods: In the experiment, we measured changes in soil thaw depth, plant species cover and soil subsidence over nine years (2007–2015). Results: After abrupt initial thaw, soil subsidence in the removal plots continued indicating further thawing of permafrost albeit at a much slower pace: 1 cm y−1 over 2012–2015 vs. 5 cm y−1 over 2007–2012. Grass cover strongly increased after the initial shrub removal, but later declined with ponding of water in the subsiding removal plots. Sedges established and expanded in the wetter removal plots. Thereby, the removal plots have become increasingly similar to nearby ‘natural’ thaw ponds. Conclusions: The nine years of field observations in a unique shrub removal experiment at a Siberian tundra site document possible trajectories of small-scale permafrost collapse and the initial stage of vegetation recovery, which is essential knowledge for assessing future tundra landscape changes. |
| Databáze: | OpenAIRE |
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