Citation:

PANGAEA.865275

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Abstract:

This data set contains information on vegetation cover, i.e. the proportion of soil surface area that is covered by different categories of plants per estimated plot area. Data was collected on the plant community level (sown plant community, weed plant community, dead plant material, and bare ground) and on the level of individual plant species in case of the sown species. 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 by bi-annual weeding and mowing.

In 2002, vegetation cover was estimated only once in Septemper just prior to mowing (during peak standing biomass) on all experimental plots of the Main Experiment. Cover was visually estimated in a central area of each plot 3 by 3 m in size (approximately 9 m²) using a decimal scale (Londo). Cover estimates for the individual species (and for target species + weeds + bare ground) can add up to more than 100% because the estimated categories represented a structure with potentially overlapping multiple layers. In 2002, cover on the community level was only estimated for the sown plant community, weed plant community and bare soil. In contrast to later years, cover of dead plant material was not estimated.

Related to:

Roscher, Christiane; Fergus, Alexander J F; Petermann, Jana S; Buchmann, Nina; Schmid, Bernhard; Schulze, Ernst-Detlef (2013): What happens to the sown species if a biodiversity experiment is not weeded? Basic and Applied Ecology, 14(3), 187-198, https://doi.org/10.1016/j.baae.2013.01.003

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; Buchmann, Nina; Schulze, Ernst-Detlef (2009): Community assembly and biomass production in regularly and never weeded experimental grasslands. Acta Oecologica-International Journal of Ecology, 35(2), 206-217, https://doi.org/10.1016/j.actao.2008.10.003

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 W (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:

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: 2002-01-01T00:00:00 * Date/Time End: 2002-12-31T00:00:00

Minimum HEIGHT above ground: 0.75 m * Maximum HEIGHT above ground: 0.75 m

Event(s):

JenExp_2002 (Jena Experiment 2002) * Latitude: 50.946100 * Longitude: 11.611300 * Date/Time Start: 2002-01-01T00:00:00 * Date/Time End: 2002-12-31T00:00:00 * 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 non-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 vegetation and soil surface cover 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 (doi:10.1594/PANGAEA.865275).

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	Height aboveground, minimum	Height abovegr min	m
3	Height aboveground, maximum	Height abovegr max	m
4	HEIGHT above ground	Height	m	Geocode – Average of min and max value
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	Sown plant community, cover	Sown plant cov	%	Measured on plot level
21	Weeds plant community, cover	Weeds cov	%	Measured on plot level
22	Bare ground, cover	Bare ground cov	%	Measured on plot level
23	Alopecurus pratensis, cover	A. pratensis cov	%	Measured on species level
24	Anthoxanthum odoratum, cover	A. odoratum cov	%	Measured on species level
25	Arrhenatherum elatius, cover	A. elatius cov	%	Measured on species level
26	Avenula pubescens, cover	A. pubescens cov	%	Measured on species level
27	Bromus erectus, cover	B. erectus cov	%	Measured on species level
28	Bromus hordeaceus, cover	B. hordeaceus cov	%	Measured on species level
29	Cynosurus cristatus, cover	C. cristatus cov	%	Measured on species level
30	Dactylis glomerata, cover	D. glomerata cov	%	Measured on species level
31	Festuca pratensis, cover	F. pratensis cov	%	Measured on species level
32	Festuca rubra, cover	F. rubra cov	%	Measured on species level
33	Holcus lanatus, cover	H. lanatus cov	%	Measured on species level
34	Luzula campestris, cover	L. campestris cov	%	Measured on species level
35	Phleum pratense, cover	P. pratense cov	%	Measured on species level
36	Poa pratensis, cover	P. pratensis cov	%	Measured on species level
37	Poa trivialis, cover	P. trivialis cov	%	Measured on species level
38	Trisetum flavescens, cover	T. flavescens cov	%	Measured on species level
39	Ajuga reptans, cover	A. reptans cov	%	Measured on species level
40	Bellis perennis, cover	B. perennis cov	%	Measured on species level
41	Glechoma hederacea, cover	G. hederacea cov	%	Measured on species level
42	Leontodon autumnalis, cover	L. autumnalis cov	%	Measured on species level
43	Leontodon hispidus, cover	L. hispidus cov	%	Measured on species level
44	Plantago lanceolata, cover	P. lanceolata cov	%	Measured on species level
45	Plantago media, cover	P. media cov	%	Measured on species level
46	Primula veris, cover	P. veris cov	%	Measured on species level
47	Prunella vulgaris, cover	P. vulgaris cov	%	Measured on species level
48	Ranunculus repens, cover	R. repens cov	%	Measured on species level
49	Taraxacum officinale, cover	T. officinale cov	%	Measured on species level
50	Veronica chamaedrys, cover	V. chamaedrys cov	%	Measured on species level
51	Achillea millefolium, cover	A. millefolium cov	%	Measured on species level
52	Anthriscus sylvestris, cover	A. sylvestris cov	%	Measured on species level
53	Campanula patula, cover	C. patula cov	%	Measured on species level
54	Cardamine pratensis, cover	C. pratensis cov	%	Measured on species level
55	Carum carvi, cover	C. carvi cov	%	Measured on species level
56	Centaurea jacea, cover	C. jacea cov	%	Measured on species level
57	Cirsium oleraceum, cover	C. oleraceum cov	%	Measured on species level
58	Crepis biennis, cover	C. biennis cov	%	Measured on species level
59	Daucus carota, cover	D. carota cov	%	Measured on species level
60	Galium mollugo, cover	G. mollugo cov	%	Measured on species level
61	Geranium pratense, cover	G. pratense cov	%	Measured on species level
62	Heracleum sphondylium, cover	H. sphondylium cov	%	Measured on species level
63	Knautia arvensis, cover	K. arvensis cov	%	Measured on species level
64	Leucanthemum vulgare, cover	L. vulgare cov	%	Measured on species level
65	Pastinaca sativa, cover	P. sativa cov	%	Measured on species level
66	Pimpinella major, cover	P. major cov	%	Measured on species level
67	Ranunculus acris, cover	R. acris cov	%	Measured on species level
68	Rumex acetosa, cover	R. acetosa cov	%	Measured on species level
69	Sanguisorba officinalis, cover	S. officinalis cov	%	Measured on species level
70	Tragopogon pratensis, cover	T. pratensis cov	%	Measured on species level
71	Lathyrus pratensis, cover	L. pratensis cov	%	Measured on species level
72	Lotus corniculatus, cover	L. corniculatus cov	%	Measured on species level
73	Medicago lupulina, cover	M. lupulina cov	%	Measured on species level
74	Medicago x varia, cover	M. x varia cov	%	Measured on species level
75	Onobrychis viciifolia, cover	O. viciifolia cov	%	Measured on species level
76	Trifolium campestre, cover	T. campestre cov	%	Measured on species level
77	Trifolium dubium, cover	T. dubium cov	%	Measured on species level
78	Trifolium fragiferum, cover	T. fragiferum cov	%	Measured on species level
79	Trifolium hybridum, cover	T. hybridum cov	%	Measured on species level
80	Trifolium pratense, cover	T. pratense cov	%	Measured on species level
81	Trifolium repens, cover	T. repens cov	%	Measured on species level
82	Vicia cracca, cover	V. cracca cov	%	Measured on species level

License:

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

Size:

2427 data points

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