Citation:

PANGAEA.880330

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Abstract:

This data set contains measurements of belowground biomass productivity, i.e. coarse and fine root biomass production (C- and N-concentration of the fine roots are attached to this dataset as well). Data presented here is from 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 in general by bi-annual weeding and mowing. Since 2010, plots were weeded three times per year.

In June 2003, five soil cores with a 4.8 cm diameter per plot were removed to 30 cm depth. The removed soil was replaced by root-free soil from the field site. The ingrowth cores were removed in September 2003 and cut with scissors until root fragments were < 1 cm in length. For root washing, a 50 g subsample of the bulk material was taken and soaked in water. The soil was removed from the roots by rinsing over a sieve with 0.5 mm mesh width. Then, organic debris and remaining soil particles were removed by hand. The remaining roots were dried at 70 °C and weighed.

In 2003, roots were seperated in coarse (diameter > 2 mm) and fine roots after root washing. After withdrawal of the ingrowth cores in September 2003, the holes were refilled with root-free soil, and the ingrowth cores were sampled again in July 2004. In 2003 and 2004, fine roots were grinded in a ball mill and 20 mg of the grinded material was used to determine C- and N-concentration of the fine roots with VarioMax CNS (Elementar).

Related to:

Bessler, Holger; Temperton, Vicky; Roscher, Christiane; Buchmann, Nina; Schmid, Bernhard; Schulze, Ernst-Detlef; Weisser, Wolfgang W; Engels, Christof (2009): Aboveground overyielding in grassland mixtures is associated with reduced biomass partitioning to belowground organs. Ecology, 90(6), 1520-1530, https://doi.org/10.1890/08-0867.1

Roscher, Christiane; Bessler, Holger; Oelmann, Yvonne; Engels, Christof; Wilcke, Wolfgang; Schulze, Ernst-Detlef (2009): Resources, recruitment limitation and invader species identity determine pattern of spontaneous invasion in experimental grasslands. Journal of Ecology, 97(1), 32-47, https://doi.org/10.1111/j.1365-2745.2008.01451.x

Scherber, Christoph; Mwangi, Peter N; Schmitz, Martin; Scherer-Lorenzen, Michael; Bessler, Holger; Engels, Christof; Eisenhauer, Nico; Migunova, Varvara D; Scheu, Stefan; Weisser, Wolfgang W; Schulze, Ernst-Detlef; Schmid, Bernhard (2010): Biodiversity and belowground interactions mediate community invasion resistance against a tall herb invader. Journal of Plant Ecology-Uk, 3(2), 99-108, https://doi.org/10.1093/jpe/rtq003

Steinbeiss, Sibylle; Bessler, Holger; Engels, Christof; Temperton, Vicky; Buchmann, Nina; Roscher, Christiane; Kreutziger, Yvonne; Baade, Jussi; Habekost, Maike; Gleixner, Gerd (2008): Plant diversity positively affects short-term soil carbon storage in experimental grasslands. Global Change Biology, 14, 2937-2949, https://doi.org/10.1111/j.1365-2486.2008.01697.x

Further details:

Plot information of the Jena Main Experiment

Treatment description

Project(s):

The Jena Experiment (JenExp)

Coverage:

Latitude: 50.946100 * Longitude: 11.611300

Date/Time Start: 2003-01-01T00:00:00 * Date/Time End: 2003-12-31T00:00:00

Minimum DEPTH, soil: 0.15 m * Maximum DEPTH, soil: 0.15 m

Event(s):

JenExp_2003 (Jena Experiment 2003) * Latitude: 50.946100 * Longitude: 11.611300 * Date/Time Start: 2003-01-01T00:00:00 * Date/Time End: 2003-12-31T00:00:00 * Location: Thuringia, Germany * Method/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".

This dataset is part of a collection of measurements of belowground plant biomass and morphological root parameters in the Jena Experiment. 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 (https://doi.pangaea.de/10.1594/PANGAEA.880330).

Parameter(s):

#	Name	Short Name	Unit	Comment
1	Experimental plot	Experimental plot		Detailed explanations of plots and the plant diversity gradient are provided in the section further details.
2	Depth, soil, minimum	Depth soil min	m
3	Depth, soil, maximum	Depth soil max	m
4	DEPTH, soil	Depth soil	m	Geocode
5	Date/time start	Date/time start		of sampling campaign
6	Date/time end	Date/time end		of sampling campaign
7	Treatment: mowing	T:mow		Detailed explanations of treatments are provided in the section further details.
8	Treatment: weeding	T:weed		Detailed explanations of treatments are provided in the section further details.
9	Treatment: weeding history	T:weed hist		Detailed explanations of treatments are provided in the section further details.
10	Treatment: seed addition	T:seed add		Detailed explanations of treatments are provided in the section further details.
11	Treatment: fertilizing	T:fert		Detailed explanations of treatments are provided in the section further details.
12	Treatment: drought	T:drought		Detailed explanations of treatments are provided in the section further details.
13	Treatment: aboveground: pesticide	T:abovegr pest		Detailed explanations of treatments are provided in the section further details.
14	Treatment: below pesticide	T:below pest		Detailed explanations of treatments are provided in the section further details.
15	Treatment: molluscide	T:mollus		Detailed explanations of treatments are provided in the section further details.
16	Treatment: nematicide	T:nema		Detailed explanations of treatments are provided in the section further details.
17	Treatment: eartworm exclosure	T:eartworm excl		Detailed explanations of treatments are provided in the section further details.
18	Treatment: phytometers	T:phyto		Detailed explanations of treatments are provided in the section further details.
19	Treatment: special	T:special		Detailed explanations of treatments are provided in the section further details.
20	Root biomass production, fine roots	Root biom prod fine	g/m²	Measured on plot level
21	Root biomass production, coarse roots	Root biom prod coarse	g/m²	Measured on plot level
22	Carbon, root, fine	C root fine	%
23	Nitrogen, root, fine	N root fine	%

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

3607 data points

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