Roscher, Christiane; Guderle, Marcus; Milcu, Alexandru; Roy, Jacques (2017): Community leaf area index (LAI) estimated in the Jena-Ecotron experiment [dataset]. 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.
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
Further details:
Project(s):
The Jena Experiment (JenExp)
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):
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):
# | 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 | Leaf area index | LAI | Guderle, Marcus | Measured on species level | ||
3 | Height aboveground, minimum | Height abovegr min | m | Guderle, Marcus | Soil surface | |
4 | Height aboveground, maximum | Height abovegr max | m | Guderle, Marcus | rough approximation of plant cover height | |
5 | HEIGHT above ground | Height | m | Guderle, Marcus | Geocode – Average of min and max value | |
6 | Date/time start | Date/time start | Guderle, Marcus | of sampling campaign | ||
7 | Date/time end | Date/time end | Guderle, Marcus | of sampling campaign | ||
8 | Treatment: mowing | T:mow | Guderle, Marcus | Detailed explanations of treatments are provided in the section further details. | ||
9 | Treatment: weeding | T:weed | Guderle, Marcus | Detailed explanations of treatments are provided in the section further details. | ||
10 | Treatment: weeding history | T:weed hist | Guderle, Marcus | Detailed explanations of treatments are provided in the section further details. | ||
11 | Treatment: seed addition | T:seed add | Guderle, Marcus | Detailed explanations of treatments are provided in the section further details. | ||
12 | Treatment: fertilizing | T:fert | Guderle, Marcus | Detailed explanations of treatments are provided in the section further details. | ||
13 | Treatment: drought | T:drought | Guderle, Marcus | Detailed explanations of treatments are provided in the section further details. | ||
14 | Treatment: aboveground: pesticide | T:abovegr pest | Guderle, Marcus | Detailed explanations of treatments are provided in the section further details. | ||
15 | Treatment: below pesticide | T:below pest | Guderle, Marcus | Detailed explanations of treatments are provided in the section further details. | ||
16 | Treatment: molluscide | T:mollus | Guderle, Marcus | Detailed explanations of treatments are provided in the section further details. | ||
17 | Treatment: nematicide | T:nema | Guderle, Marcus | Detailed explanations of treatments are provided in the section further details. | ||
18 | Treatment: eartworm exclosure | T:eartworm excl | Guderle, Marcus | Detailed explanations of treatments are provided in the section further details. | ||
19 | Treatment: phytometers | T:phyto | Guderle, Marcus | Detailed explanations of treatments are provided in the section further details. | ||
20 | Treatment: special | T:special | Guderle, Marcus | Detailed explanations of treatments are provided in the section further details. |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
228 data points