Shrub decline instead of shrub expansion in Arctic lowland tundra?

M.M.P.D. Heijmans, A.L. Nauta, D. Blok, J. Limpens, B. Li, P. Wang, J. van Huissteden, T.C. Maximov, F. Berendse

Research output: Contribution to conferenceAbstractAcademic

Abstract

Arctic tundra ecosystems are characterized by low vegetation and permanently frozen ground (permafrost). Permafrost thaw and the resulting release of greenhouse gases from decomposing soil organic carbon has the potential to accelerate climate warming. In recent decades, tundra shrub expansion has been observed in many places, in response to changing climate conditions. However, in our long-term field experiment at a Northeast-Siberian tundra site we have observed that the lowland tundra ecosystem is extremely vulnerable to increased thawing, e.g. due to disturbance, leading to thaw pond development and shrub decline . Removing the shrub part of the vegetation in the experiment initiated thawing of ice- rich permafrost, resulting in collapse of the originally elevated shrub patches into waterlogged depressions.If permafrost thawing can more frequently trigger such local permafrost collapse, methane-emitting wet depressions could become more abundant in the lowland tundra landscape, at the cost of permafrost-stabilizing low shrub vegetation, particularly in poorly-drained ice-rich permafrost regions. Shrub decline associated w ith increasing wetland extent seems an underestimated trajectory in response to climate warming, but would be in line with reports of lake expansion, and drownin,g larch trees close to the treeline in Siberian lowland tundra.

Conference

ConferenceNAEM 2015, Netherlands Annual Ecology Meeting, Lunteren, The Netherlands
Period10/02/1511/02/15

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tundra
permafrost
shrub
thawing
vegetation
warming
ice
frozen ground
ecosystem
treeline
climate
climate conditions
greenhouse gas
pond
methane
organic carbon
trajectory
wetland
disturbance
lake

Cite this

Heijmans, M. M. P. D., Nauta, A. L., Blok, D., Limpens, J., Li, B., Wang, P., ... Berendse, F. (2015). Shrub decline instead of shrub expansion in Arctic lowland tundra?. Abstract from NAEM 2015, Netherlands Annual Ecology Meeting, Lunteren, The Netherlands, .
Heijmans, M.M.P.D. ; Nauta, A.L. ; Blok, D. ; Limpens, J. ; Li, B. ; Wang, P. ; van Huissteden, J. ; Maximov, T.C. ; Berendse, F. / Shrub decline instead of shrub expansion in Arctic lowland tundra?. Abstract from NAEM 2015, Netherlands Annual Ecology Meeting, Lunteren, The Netherlands, .
@conference{f671b61f25b54366bd1c3937a0b91f84,
title = "Shrub decline instead of shrub expansion in Arctic lowland tundra?",
abstract = "Arctic tundra ecosystems are characterized by low vegetation and permanently frozen ground (permafrost). Permafrost thaw and the resulting release of greenhouse gases from decomposing soil organic carbon has the potential to accelerate climate warming. In recent decades, tundra shrub expansion has been observed in many places, in response to changing climate conditions. However, in our long-term field experiment at a Northeast-Siberian tundra site we have observed that the lowland tundra ecosystem is extremely vulnerable to increased thawing, e.g. due to disturbance, leading to thaw pond development and shrub decline . Removing the shrub part of the vegetation in the experiment initiated thawing of ice- rich permafrost, resulting in collapse of the originally elevated shrub patches into waterlogged depressions.If permafrost thawing can more frequently trigger such local permafrost collapse, methane-emitting wet depressions could become more abundant in the lowland tundra landscape, at the cost of permafrost-stabilizing low shrub vegetation, particularly in poorly-drained ice-rich permafrost regions. Shrub decline associated w ith increasing wetland extent seems an underestimated trajectory in response to climate warming, but would be in line with reports of lake expansion, and drownin,g larch trees close to the treeline in Siberian lowland tundra.",
author = "M.M.P.D. Heijmans and A.L. Nauta and D. Blok and J. Limpens and B. Li and P. Wang and {van Huissteden}, J. and T.C. Maximov and F. Berendse",
note = "pdf naar way library dd 13-03; NAEM 2015, Netherlands Annual Ecology Meeting, Lunteren, The Netherlands ; Conference date: 10-02-2015 Through 11-02-2015",
year = "2015",
language = "English",

}

Heijmans, MMPD, Nauta, AL, Blok, D, Limpens, J, Li, B, Wang, P, van Huissteden, J, Maximov, TC & Berendse, F 2015, 'Shrub decline instead of shrub expansion in Arctic lowland tundra?' NAEM 2015, Netherlands Annual Ecology Meeting, Lunteren, The Netherlands, 10/02/15 - 11/02/15, .

Shrub decline instead of shrub expansion in Arctic lowland tundra? / Heijmans, M.M.P.D.; Nauta, A.L.; Blok, D.; Limpens, J.; Li, B.; Wang, P.; van Huissteden, J.; Maximov, T.C.; Berendse, F.

2015. Abstract from NAEM 2015, Netherlands Annual Ecology Meeting, Lunteren, The Netherlands, .

Research output: Contribution to conferenceAbstractAcademic

TY - CONF

T1 - Shrub decline instead of shrub expansion in Arctic lowland tundra?

AU - Heijmans, M.M.P.D.

AU - Nauta, A.L.

AU - Blok, D.

AU - Limpens, J.

AU - Li, B.

AU - Wang, P.

AU - van Huissteden, J.

AU - Maximov, T.C.

AU - Berendse, F.

N1 - pdf naar way library dd 13-03

PY - 2015

Y1 - 2015

N2 - Arctic tundra ecosystems are characterized by low vegetation and permanently frozen ground (permafrost). Permafrost thaw and the resulting release of greenhouse gases from decomposing soil organic carbon has the potential to accelerate climate warming. In recent decades, tundra shrub expansion has been observed in many places, in response to changing climate conditions. However, in our long-term field experiment at a Northeast-Siberian tundra site we have observed that the lowland tundra ecosystem is extremely vulnerable to increased thawing, e.g. due to disturbance, leading to thaw pond development and shrub decline . Removing the shrub part of the vegetation in the experiment initiated thawing of ice- rich permafrost, resulting in collapse of the originally elevated shrub patches into waterlogged depressions.If permafrost thawing can more frequently trigger such local permafrost collapse, methane-emitting wet depressions could become more abundant in the lowland tundra landscape, at the cost of permafrost-stabilizing low shrub vegetation, particularly in poorly-drained ice-rich permafrost regions. Shrub decline associated w ith increasing wetland extent seems an underestimated trajectory in response to climate warming, but would be in line with reports of lake expansion, and drownin,g larch trees close to the treeline in Siberian lowland tundra.

AB - Arctic tundra ecosystems are characterized by low vegetation and permanently frozen ground (permafrost). Permafrost thaw and the resulting release of greenhouse gases from decomposing soil organic carbon has the potential to accelerate climate warming. In recent decades, tundra shrub expansion has been observed in many places, in response to changing climate conditions. However, in our long-term field experiment at a Northeast-Siberian tundra site we have observed that the lowland tundra ecosystem is extremely vulnerable to increased thawing, e.g. due to disturbance, leading to thaw pond development and shrub decline . Removing the shrub part of the vegetation in the experiment initiated thawing of ice- rich permafrost, resulting in collapse of the originally elevated shrub patches into waterlogged depressions.If permafrost thawing can more frequently trigger such local permafrost collapse, methane-emitting wet depressions could become more abundant in the lowland tundra landscape, at the cost of permafrost-stabilizing low shrub vegetation, particularly in poorly-drained ice-rich permafrost regions. Shrub decline associated w ith increasing wetland extent seems an underestimated trajectory in response to climate warming, but would be in line with reports of lake expansion, and drownin,g larch trees close to the treeline in Siberian lowland tundra.

M3 - Abstract

ER -

Heijmans MMPD, Nauta AL, Blok D, Limpens J, Li B, Wang P et al. Shrub decline instead of shrub expansion in Arctic lowland tundra?. 2015. Abstract from NAEM 2015, Netherlands Annual Ecology Meeting, Lunteren, The Netherlands, .