@article{CaoHerzschuhNietal.2015,
  author    = {Cao, Xianyong and Herzschuh, Ulrike and Ni, Jian and Zhao, Yan and B{\"o}hmer, Thomas},
  title     = {Spatial and temporal distributions of major tree taxa in eastern continental Asia during the last 22,000 years},
  series = {The Holocene : an interdisciplinary journal focusing on recent environmental change},
  volume    = {25},
  journal   = {The Holocene : an interdisciplinary journal focusing on recent environmental change},
  number    = {1},
  publisher = {Sage Publ.},
  address   = {London},
  issn      = {0959-6836},
  doi       = {10.1177/0959683614556385},
  pages     = {79 -- 91},
  year      = {2015},
  abstract  = {This study investigates the spatial and temporal distributions of 14 key arboreal taxa and their driving forces during the last 22,000 calendar years before ad 1950 (kyr BP) using a taxonomically harmonized and temporally standardized fossil pollen dataset with a 500-year resolution from the eastern part of continental Asia. Logistic regression was used to estimate pollen abundance thresholds for vegetation occurrence (presence or dominance), based on modern pollen data and present ranges of 14 taxa in China. Our investigation reveals marked changes in spatial and temporal distributions of the major arboreal taxa. The thermophilous (Castanea, Castanopsis, Cyclobalanopsis, Fagus, Pterocarya) and eurythermal (Juglans, Quercus, Tilia, Ulmus) broadleaved tree taxa were restricted to the current tropical or subtropical areas of China during the Last Glacial Maximum (LGM) and spread northward since c. 14.5kyr BP. Betula and conifer taxa (Abies, Picea, Pinus), in contrast, retained a wider distribution during the LGM and showed no distinct expansion direction during the Late Glacial. Since the late mid-Holocene, the abundance but not the spatial extent of most trees decreased. The changes in spatial and temporal distributions for the 14 taxa are a reflection of climate changes, in particular monsoonal moisture, and, in the late Holocene, human impact. The post-LGM expansion patterns in eastern continental China seem to be different from those reported for Europe and North America, for example, the westward spread for eurythermal broadleaved taxa.},
  language  = {en}
}
@article{HerzschuhPestryakovaSavelievaetal.2013,
  author    = {Herzschuh, Ulrike and Pestryakova, Luidmila Agafyevna and Savelieva, Larissa A. and Heinecke, Liv and B{\"o}hmer, Thomas and Biskaborn, Boris and Andreev, Andrei and Ramisch, Arne and Shinneman, Avery L. C. and Birks, H. John B.},
  title     = {Siberian larch forests and the ion content of thaw lakes form a geochemically functional entity},
  series = {Nature Communications},
  volume    = {4},
  journal   = {Nature Communications},
  publisher = {Nature Publ. Group},
  address   = {London},
  issn      = {2041-1723},
  doi       = {10.1038/ncomms3408},
  pages     = {8},
  year      = {2013},
  abstract  = {Siberian larch forests growing on shallow permafrost soils have not, until now, been considered to be controlling the abiotic and biotic characteristics of the vast number of thaw-lake ecosystems. Here we show, using four independent data sets (a modern data set from 201 lakes from the tundra to taiga, and three lake-core records), that lake-water geochemistry in Yakutia is highly correlated with vegetation. Alkalinity increases with catchment forest density. We postulate that in this arid area, higher evapotranspiration in larch forests compared with that in the tundra vegetation leads to local salt accumulation in soils. Solutes are transported to nearby thaw lakes during rain events and snow melt, but are not fully transported into rivers, because there is no continuous groundwater flow within permafrost soils. This implies that potentially large shifts in the chemical characteristics of aquatic ecosystems to known warming are absent because of the slow response of catchment forests to climate change.},
  language  = {en}
}