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Weigelt, Alexandra; Weisser, Wolfgang W (2016): Aboveground plant biomass from the Jena Experiment (Monocultures, year 2005) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.866314, In: Weigelt, Alexandra; Ebeling, Anne; Roscher, Christiane; Temperton, Vicky; De Luca, Enrica; Wagg, Cameron; Buchmann, Nina; Fischer, Markus; Scherer-Lorenzen, Michael; Schmid, Bernhard; Schulze, Ernst-Detlef; Weisser, Wolfgang W; Luo, Guangjuan; Meyer, Sebastian Tobias (2016): Collection of aboveground community and species-specific plant biomass from the Jena Experiment (time series since 2002) [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.866358

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Abstract:
This data set contains aboveground plant biomass in 2005 (Sown plant community, Weed plant community, Dead plant material, and Unidentified plant material; all measured in biomass as dry weight) of the monoculture plots of a large grassland biodiversity experiment (the Jena Experiment). In the monoculture plots the biomass of the sown plant community contains only a single species per plot and this species is a different one for each plot. Which species has been sown in which plot is stated in the plot information table for monocultures (see further details below). The monoculture plots of 3.5 x 3.5 m were established for all of the 60 plant species of the Jena Experiment species pool with two replicates per species. These 60 species comprising the species pool of the Jena Experiment belong to four functional groups (grasses, legumes, tall and small herbs). Plots were sown in May 2002 and are since maintained by bi-annual weeding and mowing.
Aboveground plant biomass was harvested twice in 2005 just prior to mowing (during peak standing biomass in early June and in late August) on all experimental plots of the monocultures. This was done by clipping the vegetation at 3 cm above ground in 2 rectangles of 0.2 x 0.5 m per plot. The location of these rectangles was assigned prior to each harvest by random selection of coordinates within the core area of the plots (i.e. excluding an outer edge of 0.5 m). The positions of the rectangles within plots were identical for all plots. The harvested biomass was sorted into categories: sown plant species, weed plant species (species not sown at the particular plot), detached dead plant material (i.e., dead plant material in the data file), and remaining plant material that could not be assigned to any category (i.e., unidentified plant material in the data file). All biomass was dried to constant weight (70°C, >= 48 h) and weighed. The data for individual subsamples (i.e. rectangles) and the mean over samples for all biomass measures are given.
Related to:
Marquard, Elisabeth; Schmid, Bernhard; Roscher, Christiane; De Luca, Enrica; Nadrowski, Karin; Weisser, Wolfgang W; Weigelt, Alexandra (2013): Changes in the Abundance of Grassland Species in Monocultures versus Mixtures and Their Relation to Biodiversity Effects. PLoS ONE, 8(9), e75599, https://doi.org/10.1371/journal.pone.0075599
Marquard, Elisabeth; Weigelt, Alexandra; Roscher, Christiane; Gubsch, Marlén; Lipowsky, Annett; Schmid, Bernhard (2009): Positive biodiversity-productivity relationship due to increased plant density. Journal of Ecology, 97(4), 696-704, https://doi.org/10.1111/j.1365-2745.2009.01521.x
Marquard, Elisabeth; Weigelt, Alexandra; Temperton, Vicky; Roscher, Christiane; Schumacher, Jens; Buchmann, Nina; Fischer, Markus; Weisser, Wolfgang W; Schmid, Bernhard (2009): Plant species richness and functional composition drive overyielding in a six-year grassland experiment. Ecology, 90(12), 3290-3302, https://doi.org/10.1890/09-0069.1
Roscher, Christiane; Schmid, Bernhard; Buchmann, Nina; Weigelt, Alexandra; Schulze, Ernst-Detlef (2010): Legume species differ in the responses of their functional traits to plant diversity. Oecologia, 165(2), 437-452, https://doi.org/10.1007/s00442-010-1735-9
Roscher, Christiane; Schumacher, Jens; Lipowsky, Annett; Gubsch, Marlén; Weigelt, Alexandra; Pompe, Sven; Kolle, Olaf; Buchmann, Nina; Schmid, Bernhard; Schulze, Ernst-Detlef (2013): A functional trait-based approach to understand community assembly and diversity–productivity relationships over 7 years in experimental grasslands. Perspectives in Plant Ecology Evolution and Systematics, 15(3), 139-149, https://doi.org/10.1016/j.ppees.2013.02.004
Roscher, Christiane; Temperton, Vicky; Scherer-Lorenzen, Michael; Schmid, Bernhard; Schmitz, Martin; Schumacher, Jens; Buchmann, Nina; Weisser, Wolfgang W; Schulze, Ernst-Detlef (2005): Overyielding in experimental grassland communities - irrespective of species pool or spatial scale. Ecology Letters, 8(4), 419-429, https://doi.org/10.1111/j.1461-0248.2005.00736.x
Further details:
Roscher, Christiane; Schumacher, Jens; Baade, Jussi; Wilcken, Sara; Gleixner, Gerd; Weisser, Wolfgang W; Schmid, Bernhard; Schulze, Ernst-Detlef (2004): The role of biodiversity for element cycling and trophic interactions: an experimental approach in a grassland community. Basic and Applied Ecology, 5(2), 107-121, https://doi.org/10.1078/1439-1791-00216
Project(s):
Coverage:
Latitude: 50.946100 * Longitude: 11.611300
Date/Time Start: 2005-01-01T00:00:00 * Date/Time End: 2005-12-31T00:00:00
Minimum HEIGHT above ground: 0.5 m * Maximum HEIGHT above ground: 0.5 m
Event(s):
JenExp_2005 (Jena Experiment 2005) * Latitude: 50.946100 * Longitude: 11.611300 * Date/Time Start: 2005-01-01T00:00:00 * Date/Time End: 2005-12-31T00:00:00 * Location: Thuringia, Germany * Method/Device: Experiment (EXP)
Comment:
The monoculture data belongs to the Jena Experiment data set representing all species sown in the main experiment on the field site of the Jena Experiment.
There are two types of missing values contained in the dataset. Empty cells represent missing values that result from the design of the experiment when the respective value does not occur and could thus not be measured. For example, the columns of half of the cells are left blank since 2008 when on the plot replicates was given up. Missing values that resulted from methodological problems, sampling errors, or lost samples/data are marked with “-9999”.
This datasets is part of a collection of time series of biomass measurements in the Jena Experiment since 2002 (doi:10.1594/PANGAEA.866358). Similar data from other experiments (e.g. Main Experiment, Dominance Experiment; see details above), other years, or other methods quantifying related data might be available in this collection.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Experimental plotExperimental plotDetailed explanations of plots and the plant diversity gradient are provided in the section further details.
2Height aboveground, minimumHeight abovegr minmSoil surface
3Height aboveground, maximumHeight abovegr maxmrough approximation of maximum vegetation height
4HEIGHT above groundHeightmGeocode – Average of min and max value
5Date/time startDate/time startof sampling campaign
6Date/time endDate/time endof sampling campaign
7ReplicateReplSpeciefies if multiple samples per plot have been taken and are provided in the data file.
8Sown plant community, biomass as dry weightSown plant biomg/m2Measured on plot level
9Weeds plant community, biomass as dry weightWeeds biomg/m2Measured on plot level
10Dead plant material, biomass as dry weightDead plant mat biomg/m2Measured on plot level
11Unidentified plant material, biomass as dry weightUnid plant mat biomg/m2Measured on plot level
Size:
7171 data points

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