cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.610956
title: Planktological-chemical observation in the water column at station M1_CTD095, Indian Ocean
DOI: 10.1594/pangaea.611029
title: Planktological-chemical observation in the water column at station M1_CTD197, Indian Ocean
DOI: 10.1594/pangaea.762743
title: Biometric measurements of fish in the Eastfrisian Wadden Sea during POLARIS cruise PO0693

description: Depth, water was calculated as mean from bathymetric depths at start/end of trawl. Standard length of Brachyra = width of carapax of Brachyra; Standard length of Natantia = length of rostrum to telsons of Natantia.
DOI: 10.1594/pangaea.865271
title: Aboveground plant community and species-specific vegetation cover from the Jena Experiment (Main Experiment, year 2008)

description: 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 2008, vegetation cover was estimated twice in May and August 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.
description: 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).
DOI: 10.1594/pangaea.610954
title: Planktological-chemical observation in the water column at station M1_CTD093, Indian Ocean
DOI: 10.1594/pangaea.757451
title: (Table 1) Fe-Mn nodules and crusts from the Cape Basin
DOI: 10.1594/pangaea.865273
title: Aboveground plant community and species-specific vegetation cover from the Jena Experiment (Main Experiment, year 2010)

description: 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 2010, vegetation cover was estimated twice in May and August 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.
description: 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).
DOI: 10.1594/pangaea.855690
title: Species-specific plant height along the plant diversity gradient in the Jena Experiment (Main Experiment, year 2002)

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.
description: 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 case 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 datasets is part of a collection of measurements of plaint height in the Main Experiment and the Dominance Experiment since 2002 (doi:10.1594/PANGAEA.855002).
DOI: 10.1594/pangaea.887353
title: Carbon and nitrogen concentrations in plants (Main Experiment, year 2002)

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).
description: 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 element concentrations in plants 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.887388).
DOI: 10.1594/pangaea.729211
title: (Table T76) Chemical composition of basalts from ODP Hole 758A, Leg 121 (Ninetyeast Ridge, Indian Ocean)
DOI: 10.1594/pangaea.956780
title: Dissolution proxies and coarse fraction of ODP Site 198-1209
DOI: 10.1594/pangaea.729065
title: (Table T65) Chemical composition of basalts from ODP Hole 642E, Leg 104 (Vøring Plateau, Norwegian Sea)
DOI: 10.1594/pangaea.887354
title: Carbon and nitrogen concentrations in plants (Main Experiment, year 2003)

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 twice in May and August 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).
description: 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 element concentrations in plants 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.887388).
DOI: 10.1594/pangaea.611040
title: Planktological-chemical observation in the water column at station M1_CTD218, Indian Ocean
DOI: 10.1594/pangaea.956782
title: Reconstruction of nannofossil abundance using the different categories of placolith fragments from ODP Site 198-1209
DOI: 10.1594/pangaea.848924
title: Dissolved organic carbon in soil solution of the Jena Experiment (Main Experiment, year 2004)

description: This data set contains measurements of dissolved organic carbon in samples of soil water collected 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 April 2002 glass suction plates with a diameter of 12 cm, 1 cm thickness and a pore size of 1–1.6 mm (UMS GmbH, Munich, Germany) were installed in depths of 10, 20, 30 and 60 cm to collect soil solution. The sampling bottles were continuously evacuated to a negative pressure between 50 and 350 mbar, such that the suction pressure was about 50 mbar above the actual soil water tension. Thus, only the soil leachate was collected. Cumulative soil solution was sampled biweekly and analyzed for dissolved organic carbon concentration by a high TOC elemental analyzer (Elementar Analysensysteme GmbH, Hanau, Germany). Samples were analyzed as soon as possible and stored at 4°C if necessary. Often in summer, no free soil solution was available for collection, especially in the upper soil layers. Annual mean values of measured biweekly concentrations of dissolved organic carbon are provided.
description: During summer month soil frequently dries out so that no soil pore water can be collected. Consequently, in these periods no DOC concentrations can be determined and these periods do not contribute to the reported annual means of DOC concentrations. Only in block 2 suction plates were installed in all four depth layers. Suction plates in 30 centimeter depth were installed in block 1, 2, and 3 in 2002. In 2005, additional suctions plates were installed in 20 centimeter depth in block 1, 2, and 3. In block 4, no samples are available because no plates were installed.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 thus cannot be measured. Missing values that resulted from methodological problems, sampling errors, or lost samples/data are marked with "-9999".In addition to measurement of dissolved organic carbon in soil solution, measurements of soil carbon (organic, inorganic, and total) determined from dried soil samples are available.This datasets is part of a time series of soil carbon measurements in the Main Experiment since 2002 (doi:10.1594/PANGAEA.848946).
DOI: 10.1594/pangaea.976468
title: Records of biogenic carbon parameter concentrations from sediment core GeoB19927-3 during the Holocene

description: The dataset contains concentrations of bioproductivity parameters from sediment samples from sediment core GeoB19927-3 (73°35,26' N, 58°05,66' W) located in Southern Melville Bay (Baffin Bay). The dataset covers the depth interval between 760-0 cm top depths, corresponding to 7.7 kyrs BP – present. The core was taken at 932 meters of water depth by gravity coring during cruise MSM44 in 2015 (Dorschel et al., 2015). The core consists of 1147 cm of sediment. The chronology has been provided by Saini et al. (2020). Excess lead is present down to 4.5 cm core depth, indicating that the core top is of recent age and only experienced minor disturbance during coring. In the upper 25 cm, the sampling for palynology was made at 1 cm interval, which corresponds to a temporal resolution of 30 years. Within the 25 cm to 280 cm interval every 5 cm and within the 280 cm to 760 cm interval every 10 cm were sub-sampled for palynology and all other analysis. Palynology sample processing followed the procedure for palynological preparation described in Vernal et al. (2010). The taxonomy of dinocysts used here was based on Rochon et al. (1999) and de Vernal et al. (2020). Organic linings of foraminifera were counted on the basis of the marker-grains method (Matthews, 1969) by adding a capsule of Lycopodium clavatum spores. Only complete linings were considered. For foraminifera analysis between 4-16 grams of freeze-dried sediment samples were wet sieved over a 63 µm mesh sieve and oven-dried at ~50 °C for one day. The whole fraction &gt; 63 µm was picked and counted for planktonic and benthic foraminifers. Planktonic and benthic specimens and their fragments were sorted into two groups and separately weighed to six decimal places using a Sartorius microbalance. Each sample was weighed five times to determine the average weight of their accumulative shells. Benthic samples were analysed with attention given to the five species yielding acid-resistant organic linings (B. elegantissima, M. zandamee, E. excavatum, C. lobatulus, C. wuellerstorfi).
DOI: 10.1594/pangaea.611032
title: Planktological-chemical observation in the water column at station M1_CTD201, Indian Ocean
DOI: 10.1594/pangaea.950307
title: Loss on ignition from sediment core Zamostye, Kursk region, Russia
DOI: 10.1594/pangaea.973012
title: Mercury concentrations of the EN20001_6 core segment from Lake Khamra, Yakutia, Siberia

description: The data includes total mercury concentrations (THg, given in µg/kg) of 22 samples from the core segment EN20001_6. Due to limited sample material, THg concentrations were analysed on the rim material of the individual samples of EN20001_6. All measurements were carried out at AWI Potsdam. Mercury concentrations were measured with a MLS-MWS DMA-80 evo III, with a detection limit of 0.003 ng and a laboratory proven limit of determination of 0.4 ng.
DOI: 10.1594/pangaea.973014
title: Mercury concentrations of sediment core EN20001 of Lake Khamra, Yakutia, Siberia

description: The data compiles total mercury concentrations (THg, given in µg/kg) of 43 samples from the sediment core EN20001 of Lake Khamra. Measurements were carried out at the AWI Potsdam using a MLS-MWS DMA-80 evo III. The machine detection limit was 0.003 ng, with a laboratory proven limit of determination of 0.4 ng.
DOI: 10.1594/pangaea.729571
title: (Table AT2) Abundance of major and trace elements in igneous rocks from ODP Holes 855A and 855D, Leg 139 (Middle Valley, Juan de Fuca Ridge)
DOI: 10.1594/pangaea.973015
title: Total nitrogen of the sediment core EN20001 from Lake Khamra, Yakutia, Siberia

description: This data is an extension to the previously published data of Stoof-Leichsenring et al. (2024), including 23 additional measurements of total nitrogen (TN) from sediment samples of the sediment core EN20001, from Lake Khamra. Nitrogen was determined with an Elementar rapid MAX N exceed, with a measurement accuracy of 0.1 %. Analyses were performed at the AWI Potsdam.
DOI: 10.1594/pangaea.329728
title: Plankton biomass of mocness net M51/2_D-MOC553-2 (DFG project: WE 695/23-1)
DOI: 10.1594/pangaea.76037
title: Plankton biomass of mocness net M44/4_D-MOC222
DOI: 10.1594/pangaea.76006
title: Plankton biomass of mocness net M44/4_D-MOC216