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Roscher, Christiane; Guderle, Marcus; Milcu, Alexandru; Roy, Jacques (2017): Community leaf area index (LAI) estimated in the Jena-Ecotron experiment. PANGAEA, https://doi.org/10.1594/PANGAEA.877649, 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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Abstract:
This dataset contains community leaf area index (LAI) 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.
Community leaf area index (LAI) was measured with a portable LAI-2000 plant canopy analyzer (LI-COR, Lincoln, USA) on 15th July 2012. LAI was measured under diffuse light (evening) by taking one reference measurement above the canopy and five measurements near ground level within the center of each lysimeter. The zenith angle was restricted to 0-43° in order to minimize the edge effect (Hyer & Goetz, 2004) inherent to a canopy with a surface of 2m². In lysimeters with a high proportion of one rosulate species (Plantago media) with leaves laying very close to the ground, the values measured with the LAI-2000 were replaced with the average value of two leaf area measurements using a LI-3100 leaf area meter (LI-COR, Lincoln, USA) from two rectangles of 0.2 × 0.5 m per plot.
Keyword(s):
Jena-Ecotron Experiment
Related to:
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
Project(s):
Coverage:
Latitude: 50.946100 * Longitude: 11.611300
Date/Time Start: 2012-01-01T00:00:00 * Date/Time End: 2012-12-31T00:00:00
Minimum HEIGHT above ground: 0.5 m * Maximum HEIGHT above ground: 0.5 m
Event(s):
JenExp_2012 (Jena Experiment 2012) * Latitude: 50.946100 * Longitude: 11.611300 * Date/Time Start: 2012-01-01T00:00:00 * Date/Time End: 2012-12-31T00:00:00 * Location: Thuringia, Germany * Method/Device: Experiment (EXP)
Comment:
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.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Experimental plotExperimental plotGuderle, MarcusDetailed explanations of plots and the plant diversity gradient are provided in the section further details.
2Leaf area indexLAIGuderle, MarcusMeasured on species level
3Height aboveground, minimumHeight minmGuderle, MarcusSoil surface
4Height aboveground, maximumHeight maxmGuderle, Marcusrough approximation of plant cover height
5HEIGHT above groundHeightmGuderle, MarcusGeocode – Average of min and max value
6Date/time startDate/time startGuderle, Marcusof sampling campaign
7Date/time endDate/time endGuderle, Marcusof sampling campaign
8Treatment: mowingTreat mowGuderle, MarcusDetailed explanations of treatments are provided in the section further details.
9Treatment: weedingTreat weedGuderle, MarcusDetailed explanations of treatments are provided in the section further details.
10Treatment: weeding historyTreat weed histGuderle, MarcusDetailed explanations of treatments are provided in the section further details.
11Treatment: seed additionTreat seed addGuderle, MarcusDetailed explanations of treatments are provided in the section further details.
12Treatment: fertilizingTreat fertGuderle, MarcusDetailed explanations of treatments are provided in the section further details.
13Treatment: droughtTreat droughtGuderle, MarcusDetailed explanations of treatments are provided in the section further details.
14Treatment: aboveground: pesticideTreat abovegr pestGuderle, MarcusDetailed explanations of treatments are provided in the section further details.
15Treatment: below pesticideTreat below pestGuderle, MarcusDetailed explanations of treatments are provided in the section further details.
16Treatment: molluscideTreat mollusGuderle, MarcusDetailed explanations of treatments are provided in the section further details.
17Treatment: nematicideTreat nemaGuderle, MarcusDetailed explanations of treatments are provided in the section further details.
18Treatment: eartworm exclosureTreat eartworm exclGuderle, MarcusDetailed explanations of treatments are provided in the section further details.
19Treatment: phytometersTreat phytoGuderle, MarcusDetailed explanations of treatments are provided in the section further details.
20Treatment: specialTreat specialGuderle, MarcusDetailed explanations of treatments are provided in the section further details.
Size:
228 data points

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