Late Holocene ice-wedge polygon dynamics in northeastern Siberian coastal lowlands
| Title: | Late Holocene ice-wedge polygon dynamics in northeastern Siberian coastal lowlands |
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| Authors: | Lutz Schirrmeister, Anatoly Bobrov, Elena Raschke, Ulrike Herzschuh, Jens Strauss, Luidmila A. Pestryakova, Sebastian Wetterich |
| Source: | Arctic, Antarctic, and Alpine Research, Vol 50, Iss 1 (2018) |
| Publisher Information: | Taylor & Francis Group, 2018. |
| Publication Year: | 2018 |
| Collection: | LCC:Environmental sciences LCC:Ecology |
| Subject Terms: | permafrost, cryolithology, radiocarbon dating, paleoecology, rhizopods, pollen, plant macro-fossils, Environmental sciences, GE1-350, Ecology, QH540-549.5 |
| More Details: | Ice-wedge polygons are common features of northeastern Siberian lowland periglacial tundra landscapes. To deduce the formation and alternation of ice-wedge polygons in the Kolyma Delta and in the Indigirka Lowland, we studied shallow cores, up to 1.3 m deep, from polygon center and rim locations. The formation of well-developed low-center polygons with elevated rims and wet centers is shown by the beginning of peat accumulation, increased organic matter contents, and changes in vegetation cover from Poaceae-, Alnus-, and Betula-dominated pollen spectra to dominating Cyperaceae and Botryoccocus presence, and Carex and Drepanocladus revolvens macro-fossils. Tecamoebae data support such a change from wetland to open-water conditions in polygon centers by changes from dominating eurybiontic and sphagnobiontic to hydrobiontic species assemblages. The peat accumulation indicates low-center polygon formation and started between 2380 ± 30 and 1676 ± 32 years before present (BP) in the Kolyma Delta. We recorded an opposite change from open-water to wetland conditions because of rim degradation and consecutive high-center polygon formation in the Indigirka Lowland between 2144 ± 33 and 1632 ± 32 years BP. The late Holocene records of polygon landscape development reveal changes in local hydrology and soil moisture. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 1523-0430 1938-4246 15230430 |
| Relation: | https://doaj.org/toc/1523-0430; https://doaj.org/toc/1938-4246 |
| DOI: | 10.1080/15230430.2018.1462595 |
| Access URL: | https://doaj.org/article/9b121a38d88f4b47bfb615477d9d0e2a |
| Accession Number: | edsdoj.9b121a38d88f4b47bfb615477d9d0e2a |
| Database: | Directory of Open Access Journals |
| ISSN: | 15230430 19384246 |
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| DOI: | 10.1080/15230430.2018.1462595 |
| Published in: | Arctic, Antarctic, and Alpine Research |
| Language: | English |