Bachmann, Dörte; Guderle, Marcus; Roscher, Christiane; Milcu, Alexandru; Buchmann, Nina; Roy, Jacques (2017): Leaf water potential measured at predawn and midday of species in the Jena-Ecotron experiment. PANGAEA, https://doi.org/10.1594/PANGAEA.877646, In supplement to: Guderle, Marcus; Bachmann, Dörte; Milcu, Alexandru; Gockele, Annette; Bechmann, Marcel; Fischer, Christine; Roscher, Christiane; Landais, Damien; Ravel, Olivier; Devidal, Sébastien; Roy, Jacques; Gessler, Arthur; Buchmann, Nina; Weigelt, Alexandra; Hildebrandt, Anke (2017): Dynamic niche partitioning in root water uptake facilitates efficient water use in more diverse grassland plant communities. Functional Ecology, https://doi.org/10.1111/1365-2435.12948
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This dataset contains leaf water potential measured at predawn and midday of species in the Jena-Ecotron Experiment in 2012. This experiment was conducted in the Montpellier European Ecotron (CNRS, France), an advanced controlled environment facility for ecosystem research, and aimed at understanding the impact of plant species richness (4 vs. 16 species) for ecosystem carbon and water fluxes.
The soil monoliths used in this experiment contained plant communities originating from the long- term Jena Experiment (50°57.1' N, 11°37.5' E, 130 m above sea level; mean annual temperature 9.3°C, mean annual precipitation 587 mm) established in May 2002. Twelve plots were selected for the Jena-Ecotron study according to the following criteria: (1) the four functional groups grasses, legumes, small and tall herbs were present, (2) realized species numbers were close to sown species richness, and (3) plots were equally distributed across the experimental field site to account for different soil textures. Large monoliths (2 m² surface area, diameter of 1.6 m, 2 m depth with a weight of 7 to 8 tons) including intact soil and vegetation were excavated in December 2011 and placed in lysimeters. In March 2012, before the start of the vegetation growth, the lysimeters were transported and installed in the Macrocosms platform of the Montpellier European Ecotron.
Leaf water potential was measured with a pressure chamber (Pressure Chamber Instruments Model 600, PMS Instrument Company, Albany, Oregon, USA) at predawn (04:00 am - 06:00 am) and midday (01:30 pm - 04:00 pm) for the most abundant species on each plot from 17-19 July 2012. Two to three species were chosen in the 4-species mixtures, and five to eight species in the 16-species mixtures. Measurements were carried out on young, but fully expanded leaves from four individuals per species per plot. Stomatal conductance and leaf greenness were measured on three leaves from different individuals of all available species in each experimental unit. Values of leaf water potential of the individual measurements were averaged per species per plot.
Milcu, Alexandru; Eugster, Werner; Bachmann, Dörte; Guderle, Marcus; Roscher, Christiane; Gockele, Annette; Landais, Damien; Ravel, Olivier; Gessler, Arthur; Lange, Markus; Ebeling, Anne; Weisser, Wolfgang W; Roy, Jacques; Hildebrandt, Anke; Buchmann, Nina (2016): Plant functional diversity increases grassland productivity-related water vapor fluxes: an Ecotron and modeling approach. Ecology, 97(8), 2044-2054, https://doi.org/10.1890/15-1110.1
Milcu, Alexandru; Roscher, Christiane; Gessler, Arthur; Bachmann, Dörte; Gockele, Annette; Guderle, Marcus; Landais, Damien; Piel, Clement; Escpape, Christophe; Devidal, Sébastien; Ravel, Olivier; Buchmann, Nina; Gleixner, Gerd; Hildebrandt, Anke; Roy, Jacques (2014): Functional diversity of leaf nitrogen concentrations drives grassland carbon fluxes. Ecology Letters, 17(4), 435-444, https://doi.org/10.1111/ele.12243
Latitude: 50.946100 * Longitude: 11.611300
Date/Time Start: 2012-07-17T00:00:00 * Date/Time End: 2017-07-19T16:07:00
Minimum HEIGHT above ground: 0.5 m * Maximum HEIGHT above ground: 0.5 m
There are two types of missing values contained in datasets from the Jena Experiment. Empty cells represent missing values that result from the design of the experiment. Empty cells result when the respective value does not occur in the design and could thus not be measured. For example, in the case of species-specific biomass cells are left blank, when the species was not sown in the respective plot. Missing values that resulted from methodological problems, sampling errors, or lost samples/data are marked with "-9999".
This dataset is part of a collection of measurements of the Jena-Ecotron Experiment, which was part of the Jena Experiment.
|#||Name||Short Name||Unit||Principal Investigator||Method/Device||Comment|
|1||Experimental plot||Experimental plot||Guderle, Marcus||Detailed explanations of plots and the plant diversity gradient are provided in the section further details.|
|2||Height aboveground, minimum||Height min||m||Guderle, Marcus||Soil surface|
|3||Height aboveground, maximum||Height max||m||Guderle, Marcus||rough approximation of max plant height|
|4||HEIGHT above ground||Height||m||Guderle, Marcus||Geocode – Average of min and max value|
|5||Date/time start||Date/time start||Guderle, Marcus||of sampling campaign|
|6||Date/time end||Date/time end||Guderle, Marcus||of sampling campaign|
|7||Replicate||Replicate||Guderle, Marcus||Speciefies if multiple samples per plot have been taken and are provided in the data file.|
|8||Treatment: mowing||Treat mow||Guderle, Marcus||Speciefies if multiple samples per plot have been taken and are provided in the data file.|
|9||Treatment: weeding||Treat weed||Guderle, Marcus||Detailed explanations of plots and the plant diversity gradient are provided in the section further details.|
|10||Treatment: weeding history||Treat weed hist||Guderle, Marcus||Detailed explanations of plots and the plant diversity gradient are provided in the section further details.|
|11||Treatment: seed addition||Treat seed add||Guderle, Marcus|
|12||Treatment: fertilizing||Treat fert||Guderle, Marcus|
|13||Treatment: drought||Treat drought||Guderle, Marcus|
|14||Treatment: aboveground: pesticide||Treat abovegr pest||Guderle, Marcus|
|15||Treatment: below pesticide||Treat below pest||Guderle, Marcus|
|16||Treatment: molluscide||Treat mollus||Guderle, Marcus|
|17||Treatment: nematicide||Treat nema||Guderle, Marcus|
|18||Treatment: eartworm exclosure||Treat eartworm excl||Guderle, Marcus|
|19||Treatment: phytometers||Treat phyto||Guderle, Marcus|
|20||Treatment: special||Treat special||Guderle, Marcus|
|22||DATE/TIME||Date/Time||Guderle, Marcus||Geocode – Time predawn|
|23||Leaf water, predawn||Leaf w predawn||bar||Guderle, Marcus||Measured on species level|
|24||DATE/TIME||Date/Time||Guderle, Marcus||Geocode – Time midday|
|25||Leaf water, midday||Leaf w midday||bar||Guderle, Marcus||Measured on species level|
8207 data points