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Long term studies of effects of climate manipulations on subarctic ecosystems

Entry ID: Experimental_Warming_Ecology_Arctic_Dorrepaal_NL

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Summary

Abstract: Since June 2000, we have been conducting a field manipulation experiment simulating climate scenarios in a subarctic Sphagnum-dominated blanket bog near Abisko, N Sweden. This experiment is unique in that it mimics six different combinations of (current and predicted) spring, summer and winter climate, each replicated five times. Passive spring and summer warming is achieved through transparent ... tent-like open-top chambers (OTC, 2.5 m diameter). In winter the same OTCs are effectively used to capture and retain snow, which in this wind-exposed site is often blown away from ambient plots but into the OTCs. The statistical design is factorial, i.e. there are 30 OTCs. i.e. 15 + 15 OTCs for ambient and warmed summer treatment and, within each summer treatment 5 for ambient spring and winter conditions, 5 with ambient spring but OTC in winter, and 5 with OTC both in spring. The replicates are organized in blocks each containing all 6 treatments.

Here we are measuring or have measured a range of features of the microclimate, soil (peat) properties, vegetation composition, diversity, structure and growth, carbon and nutrient exchange parameters, aspects of species responses (plants, microbes, soil invertebrates).

The experiment, which is planned to run until at least 2020, is embedded in international scientific networks for global change investigations, for instance the International Tundra Experiment (ITEX).

Datasets have been or are being assembled for:
- microclimate in the different treatments, including continuous recording of soil temperatures (ongoing) and (2000-2005) air temperatures; weekly snow depth; soil moisture and air humidity (in specific years); permafrost depth (active layer depth);
- soil (peat) properties at different depths;
- vegetation structure and composition down to species level, both vascular plants and cryptogams (2-yearly, through point-frame recording with associated biomass calibrations);
- plant species and functional diversity
- Sphagnum growth (in several specific years)
- annual shoot increments of target vascular species (in specific years)
- vegetative and reproductive phenology
- nutrient recycling, e.g. through resorption processes
- litter decomposition rates at the ecosystem and species level (environmental and species effects on decomposition; specific years)
- ecosystem level carbon exchange including soil respiration and photosynthesis; 13C signatures as indicators of respiration responses to warming for different peat horizons
- microbial community composition with special focus on their contributions on different nitrogen-transforming functions
- community composition of invertebrate soil fauna (Collembola, mites) and Thecamoebic protozoans (both being prepared).

Related URL

Link: VIEW RELATED INFORMATION

Description: Department of Systems Ecology at VU University Amsterdam

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

	N: 68.35	S: 68.35	E: 18.82	W: 18.82
Min Altitude: 340M Max Altitude: 370M
Min Depth: 0 Max Depth: 0.09M

Data Set Citation

Dataset Originator/Creator: Rien Aerts, Hans Cornelissen

Dataset Title: Long term studies of effects of climate manipulations on subarctic ecosystems

Dataset Release Place: The Netherlands

Dataset Publisher: NIOZ NPDC

Temporal Coverage

Start Date: 2000-06-01

Stop Date: 2020-12-31

Location Keywords

CONTINENT > EUROPE > NORTHERN EUROPE > SCANDINAVIA > SWEDEN

GEOGRAPHIC REGION > ARCTIC

GEOGRAPHIC REGION > POLAR

Science Keywords

AGRICULTURE > ANIMAL SCIENCE > ANIMAL ECOLOGY AND BEHAVIOR

BIOSPHERE > TERRESTRIAL ECOSYSTEMS > ALPINE/TUNDRA

BIOSPHERE > TERRESTRIAL ECOSYSTEMS > WETLANDS > PEATLANDS

ISO Topic Category

FARMING

BIOTA

Platform

FIELD INVESTIGATION

Instrument

TULLGREN FUNNEL

Access Constraints N/A

Use Constraints Please contact principal investigators at the department of Systems Ecology (rien.aerts [at] falw.vu.nl, hans.cornelissen [at] falw.vu.nl) at VU University Amsterdam for use and proper citation

Ancillary Keywords

Ecology

Tullgren Funnel Fauna Extractor

Data Set Progress

IN WORK

Originating Center

VU University Amsterdam, FALW, Systemsecology

Data Center

Netherlands National Polar Data Centre, Royal Netherlands Institute for Sea Research, Netherlands Organization for Scientific Research, Netherlands

Data Center URL: http://www.nioz.nl/dmg

Data Center Personnel
Name: IRA VAN DEN BROEK Phone: +31 222 369 420 Fax: +31 222 319 674 Email: ira.van.den.broek at nioz.nl Contact Address: P.O. Box 59 City: Den Burg Postal Code: 1790 AB Country: The Netherlands

Data Center Personnel
Name: TACO F. DE BRUIN Phone: +31-222-369 479 Fax: +31-222-319674 Email: bruin at nioz.nl Contact Address: P.O. Box 59 City: Den Burg Postal Code: 1790 AB Country: The Netherlands

Distribution

Distribution Media: internet

Personnel

RIEN AERTS

Role: TECHNICAL CONTACT

Role: INVESTIGATOR

Phone: +31 (0)20 59 87211

Fax: +31 (0)20 59 87123

Email: rien.aerts at ecology.falw.vu.nl

Contact Address:

De Boelelaan 1085

City: Amsterdam

Postal Code: 1081 HV

Country: The Netherlands

Publications/References

Dorrepaal E., S. Toet, R.S.P. van Logtestijn RSP, E. Swart, M.J. van de Weg, T.V. Callaghan, R. Aerts 2009. Carbon respiration from subsurface peat accelerated by climate warming in the subarctic. Nature 460: 616-U79.
Lang S.I., J.H.C. Cornelissen, A. Hölzer, C.J.F. ter Braak, M.Ahrens, T.V. Callaghan & R.Aerts 2009. Determinants of cryptogam composition and diversity in ... Sphagnum-dominated peatlands: the importance of temporal, spatial and functional scales. Journal of Ecology 97: 299-310.
Aerts, R., T.V. Callaghan, E. Dorrepaal, R.S.P. van Logtestijn, J.H.C. Cornelissen 2009. Seasonal experimental climate manipulations result in species-specific changes in leaf nutrient levels and isotopic composition in a sub-arctic bog. Functional Ecology 23: 680-688.
Wookey, P.A., R.Aerts, R.D. Bardgett, F. Baptist, K.A. Bråthen, J.H.C. Cornelissen, L. Gough, I.P. Hartley, D.W. Hopkins, S. Lavorel & G.R. Shaver. Ecosystem feedbacks and cascade processes: understanding their role in the responses of arctic and alpine ecosystems to environmental change. Global Change Biology 15: 1153-1172.

Dorrepaal, E., J.H.C. Cornelissen & R. Aerts 2007. Changing leaf litter feedbacks on plant production across contrasting sub-arctic peatland growth forms. Oecologia 151: 251-261.
Aerts R., J.H.C. Cornelissen, R.S.P. van Logtestijn & T.V. Callaghan 2007. Climate change has only a minor impact on nutrient resorption processes in a high-latitude peatland. Oecologia 151: 132-139.

Dorrepaal, E., J.H.C. Cornelissen, R. Aerts & R.S.P. van Logtestijn 2006. Sphagnum modifies climate change impacts on sub-arctic vascular bog plants. Functional Ecology 20: 31-41.

Aerts, R., J.H.C. Cornelissen & E. Dorrepaal 2006. Plant performance in a warmer world: general responses of plants from cold, northern biomes and the importance of winter and spring events. Plant Ecology 182: 65-77.

Aerts, R., J.H.C. Cornelissen, E. Dorrepaal, R.S.P. van Logtestijn & T.V. Callaghan 2004. Effects of experimentally imposed climate scenarios on flowering phenology and flower production of sub-arctic bog species. Global Change Biology 10: 1599-1609.

Dorrepaal, E., R. Aerts, J.H.C. Cornelissen, T.V. Callaghan & R.S.P. van Logtestijn 2004. Summer warming and increased winter snow cover affect Sphagnum fuscum growth, structure and production in a sub-arctic bog. Global Change Biology 10: 93-104.

Creation and Review Dates

DIF Creation Date: 2009-11-13

Last DIF Revision Date: 2010-06-04

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