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Joint research project
Experimental site
Aim of the project
Hypotheses
Innovative character
Summary

CLIMPEAT: EXPERIMENTAL SITE

Linje mire is located in northern Poland near Bydgoszcz city (northern Poland), within the Complex of Chełmno and Vistula Landscape Parks (53°11’15”-53°11’30”N, 18°18’37”-18°18’48”E). The area of the reserve is 12.7 ha, and the mire covers 5.95 ha. The average annual air temperature in the study area is 7.5-8.0°C, and average annual precipitation ranges from 500 mm to 550 mm.

In a homogenous (with respect to plant species assemblage and water table depth) area of lawn vegetation in the poor fen we will use a manipulative approach with treatments of temperature (OTC vs ambient as control) and water table depth (high, intermediate as control, low). Plots of 100x100 cm will be prepared by excavating the top layer up to a depth of 20 cm, 30 and 40 cm (the removed vegetation and peat will not be used anymore in the experiment). These holes will be refilled with intact monoliths sampled nearby in a similar area best suited for cutting intact cores of 50x50x30 cm. This will need the creation of a trench for facilitating the removal. These monoliths will be circled with a PVC frame and placed on a PVC board introduced from the side of the trench. These monoliths with their living vegetation will be transplanted (four pieces) in the prepared plots. A PVC frame 15cm depth will be inserted around the plot with its four transplanted cores. This procedure will allow for three water table levels: +10 (lower transplantation), -10 (highest transplantation) and +0 (control, transplantation at the same height). For the warming treatment, ITEX open-top hexagonal chambers (diameter 2.5 m at the bottom, 50 cm height) will be installed on a series of plots. The overall experimental design will comprise 30 plots: 3 water levels x 2 temperatures x 5 replicates.

In order to avoid soil trampling, a wood board will be permanently installed for accessing the plots. All the measurements will be carried out from a mobile platform installed above the plots at ca 70 cm. Each plot will comprise four subplots for different measurements. One subplot will be used for the vegetation relevés (frequency point-intercept measurements with a frame of 40x40 cm), one will be used for destructive soil sampling (but the holes will be refilled so as to avoid preferential drainage), one will be used for gas exchange measurements (collar of 30 cm diameter inserted in the soil to 10 cm depth), and one will be used for the water chemistry sampling with selective piezometers, for water level monitoring, for sampling individual mosses and for plant productivity and chemistry.

CLIMPEAT Project

Joint research project
Experimental site

Aim of the project

Hypotheses

Innovative character

Summary

 

Work Packages

Experimental setting and environmental monitoring
Vegetation monitoring, plant standing biomass, net primary production and total nutrient content in plants

Microbial biomass and microbial diversity

Soil enzymatic activities

Micrometeorology, carbon accumulation, soil respiration and litter decomposition

Microcosm experiment (Neuchâtel)

Drought palaeohydrology and carbon accumulation during the last 1000 years

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