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De Luca, Enrica; Weigelt, Alexandra; Schmid, Bernhard; Fischer, Markus (2016): Aboveground community and species-specific plant biomass from the Jena Experiment (Main Experiment, year 2010). PANGAEA, https://doi.org/10.1594/PANGAEA.866305, In: Weigelt, Alexandra; De Luca, Enrica; Roscher, Christiane; Temperton, Vicky; Buchmann, Nina; Fischer, Markus; Scherer-Lorenzen, Michael; Schmid, Bernhard; Schulze, Ernst-Detlef; Weisser, Wolfgang; Luo, Guangjuan; Meyer, Sebastian Tobias (2016): Collection of aboveground community and species-specific plant biomass from the Jena Experiment (time series since 2002). PANGAEA, https://doi.org/10.1594/PANGAEA.866358

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Abstract:
This data set contains aboveground community biomass in 2010 (Sown plant community, Weed plant community, Dead plant material, and Unidentified plant material; all measured in biomass as dry weight) and species-specific biomass from the sown species of the main experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the main experiment, 82 grassland plots of 20 x 20 m were established from a pool of 60 species belonging to four functional groups (grasses, legumes, tall and small herbs). In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 4, 8, 16 and 60 species) and functional richness (1, 2, 3, 4 functional groups). Plots were maintained by bi-annual weeding and mowing.
Aboveground community biomass was harvested twice in 2010 just prior to mowing (during peak standing biomass in early June and in late August) on all experimental plots of the main experiment. This was done by clipping the vegetation at 3 cm above ground in two rectangles of 0.2 x 0.5 m per large 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. the central 10 x 15 m). The positions of the rectangles within plots were identical for all plots. The harvested biomass was sorted into categories: individual species for the 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. Sown plant community biomass was calculated as the sum of the biomass of the individual sown species. The data for individual samples and the mean over samples for all biomass measures are given. Overall, analyses of the community biomass data have identified species richness as well as functional group composition as important drivers of a positive biodiversity-productivity relationship.
Related to:
Roscher, Christiane; Temperton, Vicky; Scherer-Lorenzen, Michael; Schmid, Bernhard; Schmitz, Martin; Schumacher, Jens; Buchmann, Nina; Weisser, Wolfgang; 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
Weigelt, Alexandra; Marquard, Elisabeth; Temperton, Vicky; Roscher, Christiane; Scherber, Christoph; Mwangi, Peter N; von Felten, Stefanie; Buchmann, Nina; Schmid, Bernhard; Schulze, Ernst-Detlef; Weisser, Wolfgang (2010): The Jena Experiment: six years of data from a grassland biodiversity experiment. Ecology, 91(3), 930-931, https://doi.org/10.1890/09-0863.1
Further details:
Roscher, Christiane; Schumacher, Jens; Baade, Jussi; Wilcken, Sara; Gleixner, Gerd; Weisser, Wolfgang; 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: 2010-01-01T00:00:00 * Date/Time End: 2010-12-31T00:00:00
Minimum HEIGHT above ground: 0.5 m * Maximum HEIGHT above ground: 0.5 m
Event(s):
JenExp_2010 (Jena Experiment 2010) * Latitude: 50.946100 * Longitude: 11.611300 * Date/Time Start: 2010-01-01T00:00:00 * Date/Time End: 2010-12-31T00:00:00 * Location: Thuringia, Germany * Device: Experiment (EXP)
Comment:
The main experiment on the field site of the Jena Experiment comprises a split-plot design in which additional treatments (e.g. no weeding allowing for invasion of other species, or application of fertilizer) have been applied to subplots along the outer margin of the plots (see Treatment description in the section "further details"). While in this dataset only data from the core area (mown and weeding of all none-sown species twice a year, no additional treatments) is reported, all potential treatments are listed as the first parameters in the data file to guarantee compatibility with other datasets that include different treatments.
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, in the columns of species-specific biomass cells are left blank, when the species was not sown into the respective plot. Missing values that resulted from methodological problems, sampling errors, or lost samples/data are marked with "-9999".
To calculate plot and annual means from the species specific biomass given per subsample it is important to be aware of the special missing values in the data set. Plots with single missing values indicated by "-9999", result in a difference between the following means: (1) first sum up species specific biomass per subsample for all contained species to calculated a sown species community biomass per subsample and then average the values over the subsamples per plot or (2) first average species specific biomass over subplots to get an average species specific biomass per plot and then sum these averages for all contained species to get an overall plot mean.
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 InvestigatorMethodComment
1Experimental plotExperimental plotDetailed explanations of plots and the plant diversity gradient are provided in the section "further details".
2Height aboveground, minimumHeight minmSoil surface
3Height aboveground, maximumHeight 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
7ReplicateReplicateSpeciefies if multiple samples per plot have been taken and are provided in the data file.
8Treatment: mowingTreat mowDetailed explanations of treatments are provided in the section "further details".
9Treatment: weedingTreat weedDetailed explanations of treatments are provided in the section "further details".
10Treatment: weeding historyTreat weed histDetailed explanations of treatments are provided in the section "further details".
11Treatment: seed additionTreat seed addDetailed explanations of treatments are provided in the section "further details".
12Treatment: fertilizingTreat fertDetailed explanations of treatments are provided in the section "further details".
13Treatment: droughtTreat droughtDetailed explanations of treatments are provided in the section "further details".
14Treatment: aboveground: pesticideTreat abovegr pestDetailed explanations of treatments are provided in the section "further details".
15Treatment: below pesticideTreat below pestDetailed explanations of treatments are provided in the section "further details".
16Treatment: molluscideTreat mollusDetailed explanations of treatments are provided in the section "further details".
17Treatment: nematicideTreat nemaDetailed explanations of treatments are provided in the section "further details".
18Treatment: eartworm exclosureTreat eartworm exclDetailed explanations of treatments are provided in the section "further details".
19Treatment: phytometersTreat phytoDetailed explanations of treatments are provided in the section "further details".
20Treatment: specialTreat specialDetailed explanations of treatments are provided in the section "further details".
21Alopecurus pratensis, biomass as dry weightA. pratensis biomg/m2Measured on plot level
22Anthoxanthum odoratum, biomass as dry weightA. odoratum biomg/m2Measured on plot level
23Arrhenatherum elatius, biomass as dry weightA. elatius biomg/m2Measured on plot level
24Avenula pubescens, biomass as dry weightA. pubescens biomg/m2Measured on plot level
25Bromus erectus, biomass as dry weightB. erectus biomg/m2Measured on species level
26Bromus hordeaceus, biomass as dry weightB. hordeaceus biomg/m2Measured on species level
27Cynosurus cristatus, biomass as dry weightC. cristatus biomg/m2Measured on species level
28Dactylis glomerata, biomass as dry weightD. glomerata biomg/m2Measured on species level
29Festuca pratensis, biomass as dry weightF. pratensis biomg/m2Measured on species level
30Festuca rubra, biomass as dry weightF. rubra biomg/m2Measured on species level
31Holcus lanatus, biomass as dry weightH. lanatus biomg/m2Measured on species level
32Luzula campestris, biomass as dry weightL. campestris biomg/m2Measured on species level
33Phleum pratense, biomass as dry weightP. pratense biomg/m2Measured on species level
34Poa pratensis, biomass as dry weightP. pratensis biomg/m2Measured on species level
35Poa trivialis, biomass as dry weightP. trivialis biomg/m2Measured on species level
36Trisetum flavescens, biomass as dry weightT. flavescens biomg/m2Measured on species level
37Ajuga reptans, biomass as dry weightA. reptans biomg/m2Measured on species level
38Bellis perennis, biomass as dry weightB. perennis biomg/m2Measured on species level
39Glechoma hederacea, biomass as dry weightG. hederacea biomg/m2Measured on species level
40Leontodon autumnalis, biomass as dry weightL. autumnalis biomg/m2Measured on species level
41Leontodon hispidus, biomass as dry weightL. hispidus biomg/m2Measured on species level
42Plantago lanceolata, biomass as dry weightP. lanceolata biomg/m2Measured on species level
43Plantago media, biomass as dry weightP. media biomg/m2Measured on species level
44Primula veris, biomass as dry weightP. veris biomg/m2Measured on species level
45Prunella vulgaris, biomass as dry weightP. vulgaris biomg/m2Measured on species level
46Ranunculus repens, biomass as dry weightR. repens biomg/m2Measured on species level
47Taraxacum officinale, biomass as dry weightT. officinale biomg/m2Measured on species level
48Veronica chamaedrys, biomass as dry weightV. chamaedrys biomg/m2Measured on species level
49Achillea millefolium, biomass as dry weightA. millefolium biomg/m2Measured on species level
50Anthriscus sylvestris, biomass as dry weightA. sylvestris biomg/m2Measured on species level
51Campanula patula, biomass as dry weightC. patula biomg/m2Measured on species level
52Carum carvi, biomass as dry weightC. carvi biomg/m2Measured on species level
53Cardamine pratensis, biomass as dry weightC. pratensis biomg/m2Measured on species level
54Centaurea jacea, biomass as dry weightC. jacea biomg/m2Measured on species level
55Cirsium oleraceum, biomass as dry weightC. oleraceum biomg/m2Measured on species level
56Crepis biennis, biomass as dry weightC. biennis biomg/m2Measured on species level
57Daucus carota, biomass as dry weightD. carota biomg/m2Measured on species level
58Galium mollugo, biomass as dry weightG. mollugo biomg/m2Measured on species level
59Geranium pratense, biomass as dry weightG. pratense biomg/m2Measured on species level
60Heracleum sphondylium, biomass as dry weightH. sphondylium biomg/m2Measured on species level
61Knautia arvensis, biomass as dry weightK. arvensis biomg/m2Measured on species level
62Leucanthemum vulgare, biomass as dry weightL. vulgare biomg/m2Measured on species level
63Pastinaca sativa, biomass as dry weightP. sativa biomg/m2Measured on species level
64Pimpinella major, biomass as dry weightP. major biomg/m2Measured on species level
65Ranunculus acris, biomass as dry weightR. acris biomg/m2Measured on species level
66Rumex acetosa, biomass as dry weightR. acetosa biomg/m2Measured on species level
67Sanguisorba officinalis, biomass as dry weightS. officinalis biomg/m2Measured on species level
68Tragopogon pratensis, biomass as dry weightT. pratensis biomg/m2Measured on species level
69Lathyrus pratensis, biomass as dry weightL. pratensis biomg/m2Measured on species level
70Lotus corniculatus, biomass as dry weightL. corniculatus biomg/m2Measured on species level
71Medicago lupulina, biomass as dry weightM. lupulina biomg/m2Measured on species level
72Medicago x varia, biomass as dry weightM. x varia biomg/m2Measured on species level
73Onobrychis viciifolia, biomass as dry weightO. viciifolia biomg/m2Measured on species level
74Trifolium campestre, biomass as dry weightT. campestre biomg/m2Measured on species level
75Trifolium dubium, biomass as dry weightT. dubium biomg/m2Measured on species level
76Trifolium fragiferum, biomass as dry weightT. fragiferum biomg/m2Measured on species level
77Trifolium hybridum, biomass as dry weightT. hybridum biomg/m2Measured on species level
78Trifolium pratense, biomass as dry weightT. pratense biomg/m2Measured on species level
79Trifolium repens, biomass as dry weightT. repens biomg/m2Measured on species level
80Vicia cracca, biomass as dry weightV. cracca biomg/m2Measured on species level
81Unidentified plant material, biomass as dry weightUnid plant mat biomg/m2Measured on species level
82Dead plant material, biomass as dry weightDead plant mat biomg/m2Measured on species level
83Weeds plant community, biomass as dry weightWeeds biomg/m2Measured on species level
84Sown plant community, biomass as dry weightSown plant biomg/m2Measured on species level
Size:
15528 data points

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