KOPS - The Institutional Repository of the University of Konstanz

Dispersal distances and migration rates at the arctic treeline in Siberia : a genetic and simulation based study

Dispersal distances and migration rates at the arctic treeline in Siberia : a genetic and simulation based study

Cite This

Files in this item

Files Size Format View

There are no files associated with this item.

KRUSE, Stefan, Alexander GERDES, Nadja J. KATH, Laura S. EPP, Kathleen R. STOOF-LEICHSENRING, Luidmila A. PESTRYAKOVA, Ulrike HERZSCHUH, 2018. Dispersal distances and migration rates at the arctic treeline in Siberia : a genetic and simulation based study. In: Biogeosciences Discussions. ISSN 1810-6277. eISSN 1810-6285. Available under: doi: 10.5194/bg-2018-267

@article{Kruse2018-06-18Dispe-44920, title={Dispersal distances and migration rates at the arctic treeline in Siberia : a genetic and simulation based study}, year={2018}, doi={10.5194/bg-2018-267}, issn={1810-6277}, journal={Biogeosciences Discussions}, author={Kruse, Stefan and Gerdes, Alexander and Kath, Nadja J. and Epp, Laura S. and Stoof-Leichsenring, Kathleen R. and Pestryakova, Luidmila A. and Herzschuh, Ulrike} }

Stoof-Leichsenring, Kathleen R. Gerdes, Alexander Gerdes, Alexander 2019-02-07T14:42:41Z Herzschuh, Ulrike Pestryakova, Luidmila A. eng Kruse, Stefan Kath, Nadja J. Kath, Nadja J. Dispersal distances and migration rates at the arctic treeline in Siberia : a genetic and simulation based study Epp, Laura S. terms-of-use Stoof-Leichsenring, Kathleen R. 2018-06-18 A strong temperature increase in the Arctic is expected to lead to latitudinal treeline shift. This tundra-taiga turnover would cause a positive vegetation-climate feedback due to albedo decrease. However, reliable estimates of tree migration rates are currently lacking due to the complex processes involved in forest establishment, which depend strongly on seed dispersal. We aim to fill this gap using LAVESI, an individual-based and spatially explicit Larix vegetation simulator. LAVESI was designed to simulate plots within homogeneous forests. Here, we improve the implementation of the seed dispersal function via field-based investigations. We inferred the effective seed dispersal distances of a typical open forest stand on the southern Taymyr Peninsula (north-central Siberia) from genetic parentage analysis using eight highly polymorphic nuclear microsatellite loci.<br />The parentage analysis gives effective seed dispersal distances (median ~10m) close to the seed parents. A comparison between simulated and observed effective seed dispersal distances reveals an overestimation of recruits close to the releasing tree and a shorter dispersal distance generally. We thus adapted our model and used it to simulate south-to-north transects: a slow-moving treeline front was revealed. The colonisation of the tundra areas was assisted by occasional long-distance seed dispersal events beyond the treeline area. The treeline(~1treeha<sup>−1</sup>) advanced by ~1.6myr<sup>−1</sup>, whereas the forest line (~100treesha<sup>−1</sup>) advanced by only ~0.6myr<sup>−1</sup>.<br />We conclude that the treeline in north-central Siberia currently lags behind the current strong warming and will continue to lag in the near future. 2019-02-07T14:42:41Z Pestryakova, Luidmila A. Kruse, Stefan Herzschuh, Ulrike Epp, Laura S.

This item appears in the following Collection(s)

Search KOPS


Browse

My Account