TY  - GEN
A1  - Schirrmeister, Lutz
A1  - Bobrov, Anatoly
A1  - Raschke, Elena
A1  - Herzschuh, Ulrike
A1  - Strauss, Jens
A1  - Pestryakova, Luidmila Agafyevna
A1  - Wetterich, Sebastian
T1  - Late Holocene ice-wedge polygon dynamics in  northeastern Siberian coastal lowlands
T2  - Postprints der Universität Potsdam Mathematisch-Naturwissenschaftliche Reihe
N2  - 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.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 719 
KW  - permafrost
KW  - cryolithology
KW  - radiocarbon dating
KW  - paleoecology
KW  - rhizopods
KW  - pollen
KW  - plant macro-fossils
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-426603
SN  - 1866-8372
IS  - 719
ER  - 
TY  - JOUR
A1  - Schirrmeister, Lutz
A1  - Bobrov, Anatoly
A1  - Raschke, Elena
A1  - Herzschuh, Ulrike
A1  - Strauss, Jens
A1  - Pestryakova, Luidmila Agafyevna
A1  - Wetterich, Sebastian
T1  - Late Holocene ice-wedge polygon dynamics in northeastern Siberian coastal lowlands
JF  - Arctic, antarctic, and alpine research : an interdisciplinary journal
N2  - 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.
KW  - Permafrost
KW  - cryolithology
KW  - radiocarbon dating
KW  - paleoecology
KW  - rhizopods
KW  - pollen
KW  - plant macro-fossils
Y1  - 2018
U6  - https://doi.org/10.1080/15230430.2018.1462595
SN  - 1523-0430
SN  - 1938-4246
VL  - 50
IS  - 1
PB  - Institute of Arctic and Alpine Research, University of Colorado
CY  - Boulder
ER  -