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  • 1
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    Unknown
    Collection of data on plant height along the plant diversity gradient in the Jena Experiment (Main Experiment, time series since 2002) (2015)
    PANGAEA
    Details
    Publication Date: 2023-06-24
    Description: This data set contains a time series of plant height measurements (vegetative and reproductive) from the main experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In addition, data on species specific plant heights for the main experiment are available from 2002. 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. 1. Plant height was recorded, generally, twice a year just before biomass harvest (during peak standing biomass in late May and in late August). Methodologies of measuring height have varied somewhat over the years. In earlier year the streched plant height was measured, while in later years the standing height without streching the plant was measured. Vegetative height was measured either as the height of the highest leaf or as the length of the main axis of non-flowering plants. Regenerating height was measured either as the height of the highest flower on a plant or as the height of the main axis of flowering. Sampled plants were either randomly selected in the core area of plots or along transects in defined distances. For details refer to the description of individual years. Starting in 2006, also the plots of the management experiment, that altered mowing frequency and fertilized subplots (see further details in the general description of the Jena Experiment) were sampled. 2. Species specific plant height was recorded two times in 2002: in late July (vegetative height) and just before biomass harvest during peak standing biomass in late August (vegetative and regenerative height). For each plot and each sown species in the species pool, 3 plant individuals (if present) from the central area of the plots were randomly selected and used to measure vegetative height (non-flowering indviduals) and regenerative height (flowering individuals) as stretched height. Provided are the means over the three measuremnts per plant species per plot.
    Keywords: JenExp; The Jena Experiment
    Type: Dataset
    Format: application/zip, 7 datasets
    Location Call Number Expected Availability
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  • 2
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    Unknown
    Collection of vegetation and soil surface cover in the Jena Experiment (time series since 2002) (2016)
    PANGAEA
    Details
    Publication Date: 2023-06-24
    Description: This collection contains measurements of vegetation and soil surface cover measured on the plots of the different sub-experiments at the field site 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. The following series of datasets are contained in this collection: 1. Measurements of 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 species that have been sown into the plots to create the gradient of plant diversity.
    Keywords: JenExp; The Jena Experiment
    Type: Dataset
    Format: application/zip, 10 datasets
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  • 3
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    Unknown
    Collection of aboveground community and species-specific plant biomass from the Jena Experiment (time series since 2002) (2016)
    PANGAEA
    Details
    Publication Date: 2023-09-28
    Description: This data set comprises time series of aboveground community plant biomass (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 several experiments at the field site of a large grassland biodiversity experiment (the Jena Experiment; see further details below). Aboveground community biomass was normally harvested twice a year just prior to mowing (during peak standing biomass twice a year, generally in May and August; in 2002 only once in September) on all experimental plots in the Jena Experiment. This was done by clipping the vegetation at 3 cm above ground in up to four rectangles of 0.2 x 0.5 m per large plot. The location of these rectangles was assigned by random selection of new coordinates every year within the core area of the plots. 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 the biomass measures on the community level 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. The following series of datasets are contained in this collection: 1. Plant biomass form the Main Experiment: 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). 2. Plant biomass from the Dominance Experiment: In the Dominance Experiment, 206 grassland plots of 3.5 x 3.5 m were established from a pool of 9 species that can be dominant in semi-natural grassland communities of the study region. 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, 3, 4, 6, and 9 species). 3. Plant biomass from the monoculture plots: In the monoculture plots 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 like the other experiments in May 2002. All plots were maintained by bi-annual weeding and mowing.
    Keywords: JenExp; The Jena Experiment
    Type: Dataset
    Format: application/zip, 32 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 4
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    Unknown
    Aboveground community and species-specific plant biomass from the Jena Experiment (Main Experiment, year 2004) (2015)
    PANGAEA
    Details
    Publication Date: 2024-01-26
    Description: This data set contains aboveground community biomass (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 2004 just prior to mowing (during peak standing biomass in late May 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 four 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 the biomass measures on the community level 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.
    Keywords: Achillea millefolium, biomass as dry weight; Ajuga reptans, biomass as dry weight; Alopecurus pratensis, biomass as dry weight; Anthoxanthum odoratum, biomass as dry weight; Anthriscus sylvestris, biomass as dry weight; Arrhenatherum elatius, biomass as dry weight; Avenula pubescens, biomass as dry weight; Bellis perennis, biomass as dry weight; Bromus erectus, biomass as dry weight; Bromus hordeaceus, biomass as dry weight; Campanula patula, biomass as dry weight; Cardamine pratensis, biomass as dry weight; Carum carvi, biomass as dry weight; Centaurea jacea, biomass as dry weight; Cirsium oleraceum, biomass as dry weight; Crepis biennis, biomass as dry weight; Cynosurus cristatus, biomass as dry weight; Dactylis glomerata, biomass as dry weight; Date/time end; Date/time start; Daucus carota, biomass as dry weight; Dead plant material, biomass as dry weight; Dried biomass sample; EXP; Experiment; Experimental plot; Festuca pratensis, biomass as dry weight; Festuca rubra, biomass as dry weight; Galium mollugo, biomass as dry weight; Geranium pratense, biomass as dry weight; Glechoma hederacea, biomass as dry weight; HEIGHT above ground; Height aboveground, maximum; Height aboveground, minimum; Heracleum sphondylium, biomass as dry weight; Holcus lanatus, biomass as dry weight; Jena Experiment 2004; JenExp; JenExp_2004; Knautia arvensis, biomass as dry weight; Lathyrus pratensis, biomass as dry weight; Leontodon autumnalis, biomass as dry weight; Leontodon hispidus, biomass as dry weight; Leucanthemum vulgare, biomass as dry weight; Lotus corniculatus, biomass as dry weight; Luzula campestris, biomass as dry weight; Medicago lupulina, biomass as dry weight; Medicago x varia, biomass as dry weight; Onobrychis viciifolia, biomass as dry weight; Pastinaca sativa, biomass as dry weight; Phleum pratense, biomass as dry weight; Pimpinella major, biomass as dry weight; Plantago lanceolata, biomass as dry weight; Plantago media, biomass as dry weight; Poa pratensis, biomass as dry weight; Poa trivialis, biomass as dry weight; Primula veris, biomass as dry weight; Prunella vulgaris, biomass as dry weight; Ranunculus acris, biomass as dry weight; Ranunculus repens, biomass as dry weight; Replicate; Rumex acetosa, biomass as dry weight; Sanguisorba officinalis, biomass as dry weight; Sown plant community, biomass as dry weight; Taraxacum officinale, biomass as dry weight; The Jena Experiment; Thuringia, Germany; Tragopogon pratensis, biomass as dry weight; Treatment: aboveground: pesticide; Treatment: below pesticide; Treatment: drought; Treatment: eartworm exclosure; Treatment: fertilizing; Treatment: molluscide; Treatment: mowing; Treatment: nematicide; Treatment: phytometers; Treatment: seed addition; Treatment: special; Treatment: weeding; Treatment: weeding history; Trifolium campestre, biomass as dry weight; Trifolium dubium, biomass as dry weight; Trifolium fragiferum, biomass as dry weight; Trifolium hybridum, biomass as dry weight; Trifolium pratense, biomass as dry weight; Trifolium repens, biomass as dry weight; Trisetum flavescens, biomass as dry weight; Unidentified plant material, biomass as dry weight; Veronica chamaedrys, biomass as dry weight; Vicia cracca, biomass as dry weight; Weeds plant community, biomass as dry weight
    Type: Dataset
    Format: text/tab-separated-values, 21020 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 5
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    Unknown
    Species-specific plant height along the plant diversity gradient in the Jena Experiment (Main Experiment, year 2002) (2015)
    PANGAEA
    Details
    Publication Date: 2024-01-26
    Description: This data set contains measurements of species-specific plant height: vegetative height (non-flowering indviduals) and regenerative height (flowering individuals) measured for all sown species separetly in 2002. Data was recorded in 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, plant height was recorded two times: in late July (vegetative height) and just before biomass harvest during peak standing biomass in late August (vegetative and regenerative height). For each plot and each sown species in the species pool, 3 plant individuals (if present) from the central area of the plots were randomly selected and used to measure vegetative height (non-flowering indviduals) and regenerative height (flowering individuals) as stretched height. Provided are the means over the three measuremnts per plant species per plot.
    Keywords: Achillea millefolium, regenerative height; Achillea millefolium, vegetative height; Ajuga reptans, regenerative height; Ajuga reptans, vegetative height; Alopecurus pratensis, regenerative height; Alopecurus pratensis, vegetative height; Anthoxanthum odoratum, regenerative height; Anthoxanthum odoratum, vegetative height; Anthriscus sylvestris, regenerative height; Anthriscus sylvestris, vegetative height; Arrhenatherum elatius, regenerative height; Arrhenatherum elatius, vegetative height; Avenula pubescens, regenerative height; Avenula pubescens, vegetative height; Bellis perennis, regenerative height; Bellis perennis, vegetative height; Bromus erectus, regenerative height; Bromus erectus, vegetative height; Bromus hordeaceus, regenerative height; Bromus hordeaceus, vegetative height; Campanula patula, regenerative height; Campanula patula, vegetative height; Cardamine pratensis, regenerative height; Cardamine pratensis, vegetative height; Carum carvi, regenerative height; Carum carvi, vegetative height; Centaurea jacea, regenerative height; Centaurea jacea, vegetative height; Cirsium oleraceum, regenerative height; Cirsium oleraceum, vegetative height; Crepis biennis, regenerative height; Crepis biennis, vegetative height; Cynosurus cristatus, regenerative height; Cynosurus cristatus, vegetative height; Dactylis glomerata, regenerative height; Dactylis glomerata, vegetative height; Date/time end; Date/time start; Daucus carota, regenerative height; Daucus carota, vegetative height; EXP; Experiment; Experimental plot; Festuca pratensis, regenerative height; Festuca pratensis, vegetative height; Festuca rubra, regenerative height; Festuca rubra, vegetative height; Galium mollugo, regenerative height; Galium mollugo, vegetative height; Geranium pratense, regenerative height; Geranium pratense, vegetative height; Glechoma hederacea, regenerative height; Glechoma hederacea, vegetative height; HEIGHT above ground; Height aboveground, maximum; Height aboveground, minimum; Heracleum sphondylium, regenerative height; Heracleum sphondylium, vegetative height; Holcus lanatus, regenerative height; Holcus lanatus, vegetative height; Jena Experiment 2002; JenExp; JenExp_2002; Knautia arvensis, regenerative height; Knautia arvensis, vegetative height; Lathyrus pratensis, regenerative height; Lathyrus pratensis, vegetative height; Leontodon autumnalis, regenerative height; Leontodon autumnalis, vegetative height; Leontodon hispidus, regenerative height; Leontodon hispidus, vegetative height; Leucanthemum vulgare, regenerative height; Leucanthemum vulgare, vegetative height; Lotus corniculatus, regenerative height; Lotus corniculatus, vegetative height; Luzula campestris, regenerative height; Luzula campestris, vegetative height; Medicago lupulina, regenerative height; Medicago lupulina, vegetative height; Medicago x varia, regenerative height; Medicago x varia, vegetative height; Onobrychis viciifolia, regenerative height; Onobrychis viciifolia, vegetative height; Pastinaca sativa, regenerative height; Pastinaca sativa, vegetative height; Phleum pratense, regenerative height; Phleum pratense, vegetative height; Pimpinella major, regenerative height; Pimpinella major, vegetative height; Plantago lanceolata, regenerative height; Plantago lanceolata, vegetative height; Plantago media, regenerative height; Plantago media, vegetative height; Poa pratensis, regenerative height; Poa pratensis, vegetative height; Poa trivialis, regenerative height; Poa trivialis, vegetative height; Primula veris, regenerative height; Primula veris, vegetative height; Prunella vulgaris, regenerative height; Prunella vulgaris, vegetative height; Ranunculus acris, regenerative height; Ranunculus acris, vegetative height; Ranunculus repens, regenerative height; Ranunculus repens, vegetative height; Rumex acetosa, regenerative height; Rumex acetosa, vegetative height; Sanguisorba officinalis, regenerative height; Sanguisorba officinalis, vegetative height; Taraxacum officinale, regenerative height; Taraxacum officinale, vegetative height; The Jena Experiment; Thuringia, Germany; Tragopogon pratensis, regenerative height; Tragopogon pratensis, vegetative height; Treatment: aboveground: pesticide; Treatment: below pesticide; Treatment: drought; Treatment: eartworm exclosure; Treatment: fertilizing; Treatment: molluscide; Treatment: mowing; Treatment: nematicide; Treatment: phytometers; Treatment: seed addition; Treatment: special; Treatment: weeding; Treatment: weeding history; Trifolium campestre, regenerative height; Trifolium campestre, vegetative height; Trifolium dubium, regenerative height; Trifolium dubium, vegetative height; Trifolium fragiferum, regenerative height; Trifolium fragiferum, vegetative height; Trifolium hybridum, regenerative height; Trifolium hybridum, vegetative height; Trifolium pratense, regenerative height; Trifolium pratense, vegetative height; Trifolium repens, regenerative height; Trifolium repens, vegetative height; Trisetum flavescens, regenerative height; Trisetum flavescens, vegetative height; Veronica chamaedrys, regenerative height; Veronica chamaedrys, vegetative height; Vicia cracca, regenerative height; Vicia cracca, vegetative height
    Type: Dataset
    Format: text/tab-separated-values, 5074 data points
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  • 6
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    Unknown
    Aboveground community and species-specific plant biomass from the Jena Experiment (Main Experiment, year 2003) (2015)
    PANGAEA
    Details
    Publication Date: 2024-01-26
    Description: This data set contains aboveground community biomass (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 2003 just prior to mowing (during peak standing biomass in late May 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 four 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 the biomass measures on the community level 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.
    Keywords: Achillea millefolium, biomass as dry weight; Ajuga reptans, biomass as dry weight; Alopecurus pratensis, biomass as dry weight; Anthoxanthum odoratum, biomass as dry weight; Anthriscus sylvestris, biomass as dry weight; Arrhenatherum elatius, biomass as dry weight; Avenula pubescens, biomass as dry weight; Bellis perennis, biomass as dry weight; Bromus erectus, biomass as dry weight; Bromus hordeaceus, biomass as dry weight; Campanula patula, biomass as dry weight; Cardamine pratensis, biomass as dry weight; Carum carvi, biomass as dry weight; Centaurea jacea, biomass as dry weight; Cirsium oleraceum, biomass as dry weight; Crepis biennis, biomass as dry weight; Cynosurus cristatus, biomass as dry weight; Dactylis glomerata, biomass as dry weight; Date/time end; Date/time start; Daucus carota, biomass as dry weight; Dead plant material, biomass as dry weight; Dried biomass sample; EXP; Experiment; Experimental plot; Festuca pratensis, biomass as dry weight; Festuca rubra, biomass as dry weight; Galium mollugo, biomass as dry weight; Geranium pratense, biomass as dry weight; Glechoma hederacea, biomass as dry weight; HEIGHT above ground; Height aboveground, maximum; Height aboveground, minimum; Heracleum sphondylium, biomass as dry weight; Holcus lanatus, biomass as dry weight; Jena Experiment 2003; JenExp; JenExp_2003; Knautia arvensis, biomass as dry weight; Lathyrus pratensis, biomass as dry weight; Leontodon autumnalis, biomass as dry weight; Leontodon hispidus, biomass as dry weight; Leucanthemum vulgare, biomass as dry weight; Lotus corniculatus, biomass as dry weight; Luzula campestris, biomass as dry weight; Medicago lupulina, biomass as dry weight; Medicago x varia, biomass as dry weight; Onobrychis viciifolia, biomass as dry weight; Pastinaca sativa, biomass as dry weight; Phleum pratense, biomass as dry weight; Pimpinella major, biomass as dry weight; Plantago lanceolata, biomass as dry weight; Plantago media, biomass as dry weight; Poa pratensis, biomass as dry weight; Poa trivialis, biomass as dry weight; Primula veris, biomass as dry weight; Prunella vulgaris, biomass as dry weight; Ranunculus acris, biomass as dry weight; Ranunculus repens, biomass as dry weight; Replicate; Rumex acetosa, biomass as dry weight; Sanguisorba officinalis, biomass as dry weight; Sown plant community, biomass as dry weight; Taraxacum officinale, biomass as dry weight; The Jena Experiment; Thuringia, Germany; Tragopogon pratensis, biomass as dry weight; Treatment: aboveground: pesticide; Treatment: below pesticide; Treatment: drought; Treatment: eartworm exclosure; Treatment: fertilizing; Treatment: molluscide; Treatment: mowing; Treatment: nematicide; Treatment: phytometers; Treatment: seed addition; Treatment: special; Treatment: weeding; Treatment: weeding history; Trifolium campestre, biomass as dry weight; Trifolium dubium, biomass as dry weight; Trifolium fragiferum, biomass as dry weight; Trifolium hybridum, biomass as dry weight; Trifolium pratense, biomass as dry weight; Trifolium repens, biomass as dry weight; Trisetum flavescens, biomass as dry weight; Unidentified plant material, biomass as dry weight; Veronica chamaedrys, biomass as dry weight; Vicia cracca, biomass as dry weight; Weeds plant community, biomass as dry weight
    Type: Dataset
    Format: text/tab-separated-values, 23835 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 7
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    Unknown
    Plant height along the plant diversity gradient in the Jena Experiment (Main Experiment, year 2002) (2015)
    PANGAEA
    Details
    Publication Date: 2024-01-26
    Description: This data set contains measurements of plant height: vegetative height (non-flowering indviduals) and regenerative height (flowering individuals) in 2002 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, plant height was recorded twice a year: in late June and just before biomass harvest during peak standing biomass in late August. For 3 target plant individuals (if present) per sown species from the central area of the plots, vegetative height (non-flowering indviduals) and regenerative height (flowering individuals) were measured as stretched height. Provided are the indivdiual measurements and the mean over the measured plants per plot (in June) and the mean over the measured plants per plot (in August).
    Keywords: Date/time end; Date/time start; EXP; Experiment; Experimental plot; HEIGHT above ground; Height aboveground, maximum; Height aboveground, minimum; Jena Experiment 2002; JenExp; JenExp_2002; Replicate; Sown plant community, regenerative height; Sown plant community, vegetative height; The Jena Experiment; Thuringia, Germany; Treatment: aboveground: pesticide; Treatment: below pesticide; Treatment: drought; Treatment: eartworm exclosure; Treatment: fertilizing; Treatment: molluscide; Treatment: mowing; Treatment: nematicide; Treatment: phytometers; Treatment: seed addition; Treatment: special; Treatment: weeding; Treatment: weeding history
    Type: Dataset
    Format: text/tab-separated-values, 8282 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 8
    facet.materialart.
    Unknown
    Plant height along the plant diversity gradient in the Jena Experiment (Main Experiment, year 2003) (2015)
    PANGAEA
    Details
    Publication Date: 2024-01-26
    Description: This data set contains measurements of plant height: vegetative height (length of the main axis) in 2003 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 2003, plant height was recorded twice a year just before biomass harvest (during peak standing biomass in late May and in late August). For 30 target plant individuals harvested at 10 cm distances along a 5 m transect in a control area at the margin of each experimental plot, vegetative height (length of the main axis) was measured as the length of the main axis of the plant. Provided is the mean over the measured plants per plot.
    Keywords: Date/time end; Date/time start; EXP; Experiment; Experimental plot; HEIGHT above ground; Height aboveground, maximum; Height aboveground, minimum; Jena Experiment 2003; JenExp; JenExp_2003; Replicate; Sown plant community, regenerative height; Sown plant community, vegetative height; The Jena Experiment; Thuringia, Germany; Treatment: aboveground: pesticide; Treatment: below pesticide; Treatment: drought; Treatment: eartworm exclosure; Treatment: fertilizing; Treatment: molluscide; Treatment: mowing; Treatment: nematicide; Treatment: phytometers; Treatment: seed addition; Treatment: special; Treatment: weeding; Treatment: weeding history
    Type: Dataset
    Format: text/tab-separated-values, 3444 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 9
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    Unknown
    Aboveground community and species-specific plant biomass from the Jena Experiment (Main Experiment, year 2002) (2015)
    PANGAEA
    Details
    Publication Date: 2024-01-26
    Description: This data set contains aboveground community biomass (Sown plant community, 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 in September 2002 just prior to mowing (during peak standing biomass) on all experimental plots of the main experiment. This was done by clipping the vegetation at 3 cm above ground in one rectangle of 0.2 x 0.5 m per large plot. The location of the rectangle was assigned prior to 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 rectangle within plots were identical for all plots. The harvested biomass was sorted into categories: in 2002 only individual species for the sown plant species were separated and processed. 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. 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.
    Keywords: Achillea millefolium, biomass as dry weight; Ajuga reptans, biomass as dry weight; Alopecurus pratensis, biomass as dry weight; Anthoxanthum odoratum, biomass as dry weight; Anthriscus sylvestris, biomass as dry weight; Arrhenatherum elatius, biomass as dry weight; Avenula pubescens, biomass as dry weight; Bellis perennis, biomass as dry weight; Bromus erectus, biomass as dry weight; Bromus hordeaceus, biomass as dry weight; Campanula patula, biomass as dry weight; Cardamine pratensis, biomass as dry weight; Carum carvi, biomass as dry weight; Centaurea jacea, biomass as dry weight; Cirsium oleraceum, biomass as dry weight; Crepis biennis, biomass as dry weight; Cynosurus cristatus, biomass as dry weight; Dactylis glomerata, biomass as dry weight; Date/time end; Date/time start; Daucus carota, biomass as dry weight; Dead plant material, biomass as dry weight; Dried biomass sample; EXP; Experiment; Experimental plot; Festuca pratensis, biomass as dry weight; Festuca rubra, biomass as dry weight; Galium mollugo, biomass as dry weight; Geranium pratense, biomass as dry weight; Glechoma hederacea, biomass as dry weight; HEIGHT above ground; Height aboveground, maximum; Height aboveground, minimum; Heracleum sphondylium, biomass as dry weight; Holcus lanatus, biomass as dry weight; Jena Experiment 2002; JenExp; JenExp_2002; Knautia arvensis, biomass as dry weight; Lathyrus pratensis, biomass as dry weight; Leontodon autumnalis, biomass as dry weight; Leontodon hispidus, biomass as dry weight; Leucanthemum vulgare, biomass as dry weight; Lotus corniculatus, biomass as dry weight; Luzula campestris, biomass as dry weight; Medicago lupulina, biomass as dry weight; Medicago x varia, biomass as dry weight; Onobrychis viciifolia, biomass as dry weight; Pastinaca sativa, biomass as dry weight; Phleum pratense, biomass as dry weight; Pimpinella major, biomass as dry weight; Plantago lanceolata, biomass as dry weight; Plantago media, biomass as dry weight; Poa pratensis, biomass as dry weight; Poa trivialis, biomass as dry weight; Primula veris, biomass as dry weight; Prunella vulgaris, biomass as dry weight; Ranunculus acris, biomass as dry weight; Ranunculus repens, biomass as dry weight; Rumex acetosa, biomass as dry weight; Sanguisorba officinalis, biomass as dry weight; Sown plant community, biomass as dry weight; Taraxacum officinale, biomass as dry weight; The Jena Experiment; Thuringia, Germany; Tragopogon pratensis, biomass as dry weight; Treatment: aboveground: pesticide; Treatment: below pesticide; Treatment: drought; Treatment: eartworm exclosure; Treatment: fertilizing; Treatment: molluscide; Treatment: mowing; Treatment: nematicide; Treatment: phytometers; Treatment: seed addition; Treatment: special; Treatment: weeding; Treatment: weeding history; Trifolium campestre, biomass as dry weight; Trifolium dubium, biomass as dry weight; Trifolium fragiferum, biomass as dry weight; Trifolium hybridum, biomass as dry weight; Trifolium pratense, biomass as dry weight; Trifolium repens, biomass as dry weight; Trisetum flavescens, biomass as dry weight; Veronica chamaedrys, biomass as dry weight; Vicia cracca, biomass as dry weight
    Type: Dataset
    Format: text/tab-separated-values, 2344 data points
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  • 10
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    Carbon and nitrogen concentrations in plants (Main Experiment, year 2002) (2018)
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    Publication Date: 2024-06-13
    Description: This data set contains measurements of carbon and nitrogen concentrations in aboveground plant biomass. 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, plot size was reduced to 5 x 6 m and plots were weeded three times per year. Aboveground plant biomass was harvested once in September at estimated peak standing biomass before mowing. Plants were clipped at 3 cm above ground level in four rectangles of 20 x 50 cm size per plot. All material was sorted to species, weeds and rest (dead). Samples were dried at 70 °C for at least 48 h and weeds and rest were thrown away. All other material from one plot was combined to one sample and cut up with an analysis mill (Kinematica, Littau, Schweiz). The cut material was milled to fine powder in a ball-mill (Cyclotec 1093 Sample Mill, Foss Tecator, Hoganas, Sweden). From the milled material appr. 20 mg were weighed in for CN analysis. Carbon and nitrogen concentrations of this subsample were then determined with an elemental analyzer (vario EL element alalyser).
    Keywords: Carbon; Date/time end; Date/time start; EXP; Experiment; Experimental plot; HEIGHT above ground; Height aboveground, maximum; Height aboveground, minimum; Jena Experiment 2002; JenExp; JenExp_2002; Nitrogen, total; The Jena Experiment; Thuringia, Germany; Treatment: aboveground: pesticide; Treatment: below pesticide; Treatment: drought; Treatment: eartworm exclosure; Treatment: fertilizing; Treatment: molluscide; Treatment: mowing; Treatment: nematicide; Treatment: phytometers; Treatment: seed addition; Treatment: special; Treatment: weeding; Treatment: weeding history
    Type: Dataset
    Format: text/tab-separated-values, 1640 data points
    Location Call Number Expected Availability
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