@article{SchneiderWetterichSchirrmeisteretal.2016,
  author    = {Schneider, Andrea and Wetterich, Sebastian and Schirrmeister, Lutz and Herzschuh, Ulrike and Meyer, Hanno and Pestryakova, Luidmila Agafyevna},
  title     = {Freshwater ostracods (Crustacea) and environmental variability of polygon ponds in the tundra of the Indigirka Lowland, north-east Siberia},
  series = {Polar research : a Norwegian journal of Polar research},
  volume    = {35},
  journal   = {Polar research : a Norwegian journal of Polar research},
  publisher = {Society of Exploration Geophysicists},
  address   = {Abingdon},
  issn      = {0800-0395},
  doi       = {10.3402/polar.v35.25225},
  pages     = {22},
  year      = {2016},
  abstract  = {Freshwater ostracods (Crustacea, Ostracoda) are valuable biological indicators. In Arctic environments, their habitat conditions are barely known and the abundance and diversity of ostracods is documented only in scattered records with incomplete ecological characterization. To determine the taxonomic range of ostracod assemblages and their habitat conditions in polygon ponds in the Indigirka Lowland, north-east Siberia, we collected more than 100 living ostracod individuals per site with a plankton net (mesh size 65 mm) and an exhaustor system from 27 water bodies and studied them in the context of substrate and hydrochemical data. During the summer of 2011, a single pond site and its ostracod population was selected for special study. This first record of the ostracod fauna in the Indigirka Lowland comprises eight species and three additional taxa. Fabaeformiscandona krochini and F. groenlandica were documented for the first time in continental Siberia. Repeated sampling of a low-centre polygon pond yielded insights into the population dynamics of F. pedata. We identified air temperature and precipitation as the main external drivers of water temperatures, water levels, ion concentrations and water stable isotope composition on diurnal and seasonal scales.},
  language  = {en}
}
@article{BiskabornSubettoSavelievaetal.2016,
  author    = {Biskaborn, Boris and Subetto, D. A. and Savelieva, L. A. and Vakhrameeva, P. S. and Hansche, A. and Herzschuh, Ulrike and Klemm, J. and Heinecke, L. and Pestryakova, Luidmila Agafyevna and Meyer, H. and Kuhn, G. and Diekmann, Bernhard},
  title     = {Late Quaternary vegetation and lake system dynamics in north-eastern Siberia: Implications for seasonal climate variability},
  series = {Quaternary science reviews : the international multidisciplinary research and review journal},
  volume    = {147},
  journal   = {Quaternary science reviews : the international multidisciplinary research and review journal},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0277-3791},
  doi       = {10.1016/j.quascirev.2015.08.014},
  pages     = {406 -- 421},
  year      = {2016},
  abstract  = {Although the climate development over the Holocene in the Northern Hemisphere is well known, palaeolimnological climate reconstructions reveal spatiotemporal variability in northern Eurasia. Here we present a multi-proxy study from north-eastern Siberia combining sediment geochemistry, and diatom and pollen data from lake-sediment cores covering the last 38,000 cal. years. Our results show major changes in pyrite content and fragilarioid diatom species distributions, indicating prolonged seasonal lake-ice cover between similar to 13,500 and similar to 8900 cal. years BP and possibly during the 8200 cal. years BP cold event. A pollen-based climate reconstruction generated a mean July temperature of 17.8 degrees C during the Holocene Thermal Maximum (HTM) between similar to 8900 and similar to 4500 cal. years BP. Naviculoid diatoms appear in the late Holocene indicating a shortening of the seasonal ice cover that continues today. Our results reveal a strong correlation between the applied terrestrial and aquatic indicators and natural seasonal climate dynamics in the Holocene. Planktonic diatoms show a strong response to changes in the lake ecosystem due to recent climate warming in the Anthropocene. We assess other palaeolimnological studies to infer the spatiotemporal pattern of the HTM and affirm that the timing of its onset, a difference of up to 3000 years from north to south, can be well explained by climatic teleconnections. The westerlies brought cold air to this part of Siberia until the Laurentide ice sheet vanished 7000 years ago. The apparent delayed ending of the HTM in the central Siberian record can be ascribed to the exceedance of ecological thresholds trailing behind increases in winter temperatures and decreases in contrast in insolation between seasons during the mid to late Holocene as well as lacking differentiation between summer and winter trends in paleolimnological reconstructions. (C) 2015 Elsevier Ltd. All rights reserved.},
  language  = {en}
}
@article{ZibulskiHerzschuhPestryakova2016,
  author    = {Zibulski, Romy and Herzschuh, Ulrike and Pestryakova, Luidmila Agafyevna},
  title     = {Vegetation patterns along micro-relief and vegetation type transects in polygonal landscapes of the Siberian Arctic},
  series = {Journal of vegetation science},
  volume    = {27},
  journal   = {Journal of vegetation science},
  publisher = {Wiley-Blackwell},
  address   = {Hoboken},
  issn      = {1100-9233},
  doi       = {10.1111/jvs.12356},
  pages     = {377 -- 386},
  year      = {2016},
  abstract  = {QuestionHow important is the effect of micro-relief and vegetation type on the characteristics of vascular plants and bryophytes in low-centred polygons? LocationSiberian Arctic, Russia. MethodsEight low-centred polygons in northern Siberia were surveyed for vegetation along transects running from the rim to the pond via the rim-pond transition of each polygon and across a vegetation type gradient from open forest to tundra. ResultsThe cover of vascular plants and bryophytes displays no significant differences between the rim and rim-pond transition but is significantly lower in the pond section of the polygons. Alpha-diversity of vascular plants decreases strongly from rim to pond, whereas bryophyte diversity in pond plots is significantly distinct from the rim and the rim-pond transition. There is no clear trend in cover for either plant group along the vegetation type transect and only a weak trend in -diversity. However, both gradients are reflected in the compositional turnover. The applied indicator species analysis identified taxa characteristic of certain environmental conditions. Among others, we found vascular plants primarily characteristic of the rim and bryophyte taxa characteristic of each micro-relief level and vegetation type. ConclusionsThe observed gradual pattern in -diversity and composition of polygonal vegetation suggests that micro-relief is the main driver of changes in the vegetation composition, while vegetation type and the related forest cover change are of subordinate importance for polygonal vegetation patterns along the Siberian tree line.},
  language  = {en}
}
@article{KlemmHerzschuhPestryakova2016,
  author    = {Klemm, Juliane and Herzschuh, Ulrike and Pestryakova, Luidmila Agafyevna},
  title     = {Vegetation, climate and lake changes over the last 7000 years at the boreal treeline in north-central Siberia},
  series = {Quaternary science reviews : the international multidisciplinary research and review journal},
  volume    = {147},
  journal   = {Quaternary science reviews : the international multidisciplinary research and review journal},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0277-3791},
  doi       = {10.1016/j.quascirev.2015.08.015},
  pages     = {422 -- 434},
  year      = {2016},
  language  = {en}
}