Climaite - a three factor climate change ecosystem manipulation study: set up and approaches for data analysis

Teis N. Mikkelsen; Claus Beier; Inger Kappel Schmidt; Anders Michelsen; Kristian Albert; Per Lennart Ambus; Karen Stevnbak Andersen

Abstract

In a new Danish climate change related field scale experiment, CLIMAITE, we are investigating the impacts of individual and multiple simultaneous global changes on ecosystem processes and functioning in a Danish semi natural grassland vegetation dominated by Deschampsia flexuosa and Calluna vulgaris. The Climaite experiment involves three global change factors: elevated CO2 (510 ppm), elevated temperature (+ 1-2 C) and altered precipitation (1-1.5 months extended drought in May-July) all compared to ambient conditions in a complete factorial design. The experiment includes six replicates of each of the 8 treatments organized as a split-plot design with 12 octagonal plots with a diameter of 6.5m, each divided into four 8.3-m2 quadrants. The terrain is heterogeneous because it is hilly and has patches with trees. For improvement of the statistical power the plots have been grouped in pairs (based on vegetation analysis) containing each of the 8 treatments. Prior to initiation of the treatments 3rd October 2005, pre treatment measurements and studies were conducted for establishing the initial status of key variables e.g. soil and air temperature, soil moisture, species composition, the physiological status of plants, soil water chemistry and emission of green house gasses. The CO2 is enhanced all year around during daylight hours in 6 plots by the use of a FACE system (F. Miglietta design). Temperature elevation is achieved by night time warming where IR reflective curtains automatically cover half of each of the 12 plots 60 cm above the soil surface. Summer drought for 1-1.5 months between May and July will be conducted through water removal by water proof curtains automatically covering half of each of the 12 plots (perpendicular to the IR curtain) during rain events. We here present initial results from the first treatment year on manipulated and ambient CO2 concentrations and night time temperatures together with plant, soil and ecosystem responses to the treatments (e.g. vegetation surface temperature, soil water content, soil water chemistry, phenology and C sequestration). (www.climaite.dk)

Original language	English
Publication date	2006
Publication status	Published - 2006
Event	Ecological Society of America, ESA, 2006 conference annual meeting - Memphis, Tennessee, United States Duration: 4 Aug 2006 → 12 Aug 2006

Conference

Conference	Ecological Society of America, ESA, 2006 conference annual meeting
Country/Territory	United States
City	Memphis, Tennessee
Period	04/08/2006 → 12/08/2006

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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Climaite - a three factor climate change ecosystem manipulation study: set up and approaches for data analysis. / N. Mikkelsen, Teis; Beier, Claus; Schmidt, Inger Kappel et al.

2006. Abstract from Ecological Society of America, ESA, 2006 conference annual meeting, Memphis, Tennessee, United States.

Research output: Contribution to conference › Conference abstract for conference › Research

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abstract = "In a new Danish climate change related field scale experiment, CLIMAITE, we are investigating the impacts of individual and multiple simultaneous global changes on ecosystem processes and functioning in a Danish semi natural grassland vegetation dominated by Deschampsia flexuosa and Calluna vulgaris. The Climaite experiment involves three global change factors: elevated CO2 (510 ppm), elevated temperature (+ 1-2 C) and altered precipitation (1-1.5 months extended drought in May-July) all compared to ambient conditions in a complete factorial design. The experiment includes six replicates of each of the 8 treatments organized as a split-plot design with 12 octagonal plots with a diameter of 6.5m, each divided into four 8.3-m2 quadrants. The terrain is heterogeneous because it is hilly and has patches with trees. For improvement of the statistical power the plots have been grouped in pairs (based on vegetation analysis) containing each of the 8 treatments. Prior to initiation of the treatments 3rd October 2005, pre treatment measurements and studies were conducted for establishing the initial status of key variables e.g. soil and air temperature, soil moisture, species composition, the physiological status of plants, soil water chemistry and emission of green house gasses. The CO2 is enhanced all year around during daylight hours in 6 plots by the use of a FACE system (F. Miglietta design). Temperature elevation is achieved by night time warming where IR reflective curtains automatically cover half of each of the 12 plots 60 cm above the soil surface. Summer drought for 1-1.5 months between May and July will be conducted through water removal by water proof curtains automatically covering half of each of the 12 plots (perpendicular to the IR curtain) during rain events. We here present initial results from the first treatment year on manipulated and ambient CO2 concentrations and night time temperatures together with plant, soil and ecosystem responses to the treatments (e.g. vegetation surface temperature, soil water content, soil water chemistry, phenology and C sequestration). (www.climaite.dk)",

author = "{N. Mikkelsen}, Teis and Claus Beier and Schmidt, {Inger Kappel} and Anders Michelsen and Kristian Albert and Ambus, {Per Lennart} and Andersen, {Karen Stevnbak}",

note = "Key words: climate change, related field scale experiment, ecosystem, semi natural grassland vegetation, manipulation, CO2, temperature and precipitation; Ecological Society of America, ESA, 2006 conference annual meeting ; Conference date: 04-08-2006 Through 12-08-2006",

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language = "English",

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T1 - Climaite - a three factor climate change ecosystem manipulation study: set up and approaches for data analysis

AU - N. Mikkelsen, Teis

AU - Beier, Claus

AU - Schmidt, Inger Kappel

AU - Michelsen, Anders

AU - Albert, Kristian

AU - Ambus, Per Lennart

AU - Andersen, Karen Stevnbak

N1 - Key words: climate change, related field scale experiment, ecosystem, semi natural grassland vegetation, manipulation, CO2, temperature and precipitation

PY - 2006

Y1 - 2006

N2 - In a new Danish climate change related field scale experiment, CLIMAITE, we are investigating the impacts of individual and multiple simultaneous global changes on ecosystem processes and functioning in a Danish semi natural grassland vegetation dominated by Deschampsia flexuosa and Calluna vulgaris. The Climaite experiment involves three global change factors: elevated CO2 (510 ppm), elevated temperature (+ 1-2 C) and altered precipitation (1-1.5 months extended drought in May-July) all compared to ambient conditions in a complete factorial design. The experiment includes six replicates of each of the 8 treatments organized as a split-plot design with 12 octagonal plots with a diameter of 6.5m, each divided into four 8.3-m2 quadrants. The terrain is heterogeneous because it is hilly and has patches with trees. For improvement of the statistical power the plots have been grouped in pairs (based on vegetation analysis) containing each of the 8 treatments. Prior to initiation of the treatments 3rd October 2005, pre treatment measurements and studies were conducted for establishing the initial status of key variables e.g. soil and air temperature, soil moisture, species composition, the physiological status of plants, soil water chemistry and emission of green house gasses. The CO2 is enhanced all year around during daylight hours in 6 plots by the use of a FACE system (F. Miglietta design). Temperature elevation is achieved by night time warming where IR reflective curtains automatically cover half of each of the 12 plots 60 cm above the soil surface. Summer drought for 1-1.5 months between May and July will be conducted through water removal by water proof curtains automatically covering half of each of the 12 plots (perpendicular to the IR curtain) during rain events. We here present initial results from the first treatment year on manipulated and ambient CO2 concentrations and night time temperatures together with plant, soil and ecosystem responses to the treatments (e.g. vegetation surface temperature, soil water content, soil water chemistry, phenology and C sequestration). (www.climaite.dk)

AB - In a new Danish climate change related field scale experiment, CLIMAITE, we are investigating the impacts of individual and multiple simultaneous global changes on ecosystem processes and functioning in a Danish semi natural grassland vegetation dominated by Deschampsia flexuosa and Calluna vulgaris. The Climaite experiment involves three global change factors: elevated CO2 (510 ppm), elevated temperature (+ 1-2 C) and altered precipitation (1-1.5 months extended drought in May-July) all compared to ambient conditions in a complete factorial design. The experiment includes six replicates of each of the 8 treatments organized as a split-plot design with 12 octagonal plots with a diameter of 6.5m, each divided into four 8.3-m2 quadrants. The terrain is heterogeneous because it is hilly and has patches with trees. For improvement of the statistical power the plots have been grouped in pairs (based on vegetation analysis) containing each of the 8 treatments. Prior to initiation of the treatments 3rd October 2005, pre treatment measurements and studies were conducted for establishing the initial status of key variables e.g. soil and air temperature, soil moisture, species composition, the physiological status of plants, soil water chemistry and emission of green house gasses. The CO2 is enhanced all year around during daylight hours in 6 plots by the use of a FACE system (F. Miglietta design). Temperature elevation is achieved by night time warming where IR reflective curtains automatically cover half of each of the 12 plots 60 cm above the soil surface. Summer drought for 1-1.5 months between May and July will be conducted through water removal by water proof curtains automatically covering half of each of the 12 plots (perpendicular to the IR curtain) during rain events. We here present initial results from the first treatment year on manipulated and ambient CO2 concentrations and night time temperatures together with plant, soil and ecosystem responses to the treatments (e.g. vegetation surface temperature, soil water content, soil water chemistry, phenology and C sequestration). (www.climaite.dk)

M3 - Conference abstract for conference

T2 - Ecological Society of America, ESA, 2006 conference annual meeting

Y2 - 4 August 2006 through 12 August 2006

ER -