cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.854366
title: Mineral nitrogen from KCl extractions of soil from the Jena Experiment (Main Experiment up to 30cm depth, year 2003)

description: As an estimate of plant‐available N, this data set contains measurements of inorganic nitrogen (NO3‐N and NH4‐N, the sum of which is termed mineral N or Nmin) determined by extraction with 1 M KCl solution of soil samples 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. Soil sampling and analysis: Five soil cores (diameter 0.01 m) were taken at a depth of 0 to 0.15 m and 0.15 to 0.3 m of the mineral soil from each of the experimental plots in March, June, and October 2003. Samples of the soil cores per plot were pooled during each sampling campaign. NO3‐N and NH4‐N concentrations were determined by extraction of soil samples with 1 M KCl solution and were measured in the soil extract with a Continuous Flow Analyzer (CFA, Skalar, Breda, Netherlands).
description: In addition to measurements of mineral nitrogen from KCl-extractions of soil samples, measurements of total nitrogen determined from dried soil samples and measurements of dissolved nitrogen in soil solution are available.This datasets is part of a time series of soil nitrogen measurements in the Main Experiment since 2002 (doi:10.1594/PANGAEA.854372).
DOI: 10.1594/pangaea.854368
title: Mineral nitrogen from KCl extractions of soil from the Jena Experiment (Main Experiment up to 15cm depth, year 2005)

description: As an estimate of plant‐available N, this data set contains measurements of inorganic nitrogen (NO3‐N and NH4‐N, the sum of which is termed mineral N or Nmin) determined by extraction with 1 M KCl solution of soil samples 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. Soil sampling and analysis: Five soil cores (diameter 0.01 m) were taken at a depth of 0 to 0.15 m of the mineral soil from each of the experimental plots in April and September 2005. Samples of the soil cores per plot were pooled during each sampling campaign. NO3‐N and NH4‐N concentrations were determined by extraction of soil samples with 1 M KCl solution and were measured in the soil extract with a Continuous Flow Analyzer (CFA, Skalar, Breda, Netherlands).
description: In addition to measurements of mineral nitrogen from KCl-extractions of soil samples, measurements of total nitrogen determined from dried soil samples and measurements of dissolved nitrogen in soil solution are available.This datasets is part of a time series of soil nitrogen measurements in the Main Experiment since 2002 (doi:10.1594/PANGAEA.854372).
DOI: 10.1594/pangaea.854358
title: Total nitrogen from solid phase in the Jena Experiment (Block 2 Main Experiment up to 100cm depth, year 2002)

description: This data set contains measurements of total nitrogen 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. Soil sampling and analysis: Stratified soil sampling to a depth of 1m was performed before sowing in April 2002. Three independent samples per plot were taken of all plots in block 2 using a motor-driven soil column cylinder (Cobra, Eijkelkamp, 8.3 cm in diameter). Soil samples were dried at 40°C and segmented to a depth resolution of 5 cm giving 20 depth subsamples per core. All samples were analyzed independently. All soil samples were passed through a sieve with a mesh size of 2 mm. Rarely present visible plant remains were removed using tweezers. Total nitrogen concentration was analyzed on ball-milled subsamples (time 4 min, frequency 30 s-1) by an elemental analyzer at 1150°C (Elementaranalysator vario Max CN; Elementar Analysensysteme GmbH, Hanau, Germany).
description: In addition to measurements of total nitrogen determined from dried soil samples, measurement of dissolved nitrogen in soil solution and measurements of mineral nitrogen from KCl-extractions of soil samples are available.This datasets is part of a time series of soil nitrogen measurements in the Main Experiment since 2002 (doi:10.1594/PANGAEA.854372).
DOI: 10.1594/pangaea.854369
title: Mineral nitrogen from KCl extractions of soil from the Jena Experiment (Main Experiment up to 15cm depth, year 2006)

description: As an estimate of plant‐available N, this data set contains measurements of inorganic nitrogen (NO3‐N and NH4‐N, the sum of which is termed mineral N or Nmin) determined by extraction with 1 M KCl solution of soil samples 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. Soil sampling and analysis: Five soil cores (diameter 0.01 m) were taken at a depth of 0 to 0.15 m of the mineral soil from each of the experimental plots in March 2006. In October 2006 also the plots of the management experiment, that altered mowing frequency and fertilized subplots (see further details below) were sampled. Measurements from the management experiment are separated into 0 to 0.08 m and 0.08 to 0.15 m. Samples of the soil cores per plot (subplots in case of the management experiment) were pooled during each sampling campaign. NO3‐N and NH4‐N concentrations were determined by extraction of soil samples with 1 M KCl solution and were measured in the soil extract with a Continuous Flow Analyzer (CFA, AutoAnalyzer, Seal, Burgess Hill, United Kingdom).
description: In addition to measurements of mineral nitrogen from KCl-extractions of soil samples, measurements of total nitrogen determined from dried soil samples and measurements of dissolved nitrogen in soil solution are available.This datasets is part of a time series of soil nitrogen measurements in the Main Experiment since 2002 (doi:10.1594/PANGAEA.854372).
DOI: 10.1594/pangaea.611044
title: Planktological-chemical observation in the water column at station M1_CTD223, Indian Ocean
DOI: 10.1594/pangaea.396033
title: Zooplankton biomass at Seine Seamount of MOCNESS net tow station POS309_32
DOI: 10.1594/pangaea.76043
title: Plankton biomass of mocness net M44/4_D-MOC268
DOI: 10.1594/pangaea.396036
title: Zooplankton biomass at Seine Seamount of MOCNESS net tow station POS309_44
DOI: 10.1594/pangaea.396038
title: Zooplankton biomass at Seine Seamount of MOCNESS net tow station POS322_199

description: Samples L3, L4, and L5 were taken 10 m above ground. Samples L6 was taken 20 m above ground.
DOI: 10.1594/pangaea.611007
title: Planktological-chemical observation in the water column at station M1_CTD158, Indian Ocean
DOI: 10.1594/pangaea.76010
title: Plankton biomass of mocness net M44/4_D-MOC223
DOI: 10.1594/pangaea.729419
title: (Table T103) Chemical composition of igneous rocks from ODP Hole 786B, Leg 125 (Izu-Bonin Forearc Basin)
DOI: 10.1594/pangaea.921995
title: Shell parameters of flat tree oysters during the field experiment in Mangrove Bay, Ferry, Reach, Bermuda
DOI: 10.1594/pangaea.762726
title: Biometric measurements of fish in the Eastfrisian Wadden Sea during POLARIS cruise PO0296

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.82469
title: Makrozooplankton at ALOHA Station during cruise HOT-127

description: Nets are towed obliquely at approx. 1 knot, from the surface to approx. 175 m. Towing time is approx. 20 minutes. Zooplankton (weak swimmers &gt;200µm) are collected using oblique tows of a 1 m**2 net (3m length) with 202µm mesh Nitex netting.
DOI: 10.1594/pangaea.610942
title: Planktological-chemical observation in the water column at station M1_CTD045, Indian Ocean
DOI: 10.1594/pangaea.729228
title: (Table T89) Chemical composition of basalts from ODP Holes 706C, Leg 115 (Mascarene Plateau, West Indian Ocean)

description: In the column Comment: 1 = data of mineral determinations obtained by Sevigny et al. (1992), doi:10.2973/odp.proc.sr.120.117.1992.
DOI: 10.1594/pangaea.729569
title: (Table T127) Composition of serpentinized harzburgites from ODP Hole 637A, Leg 103 (Galicia Margin, Atlantic Ocean)
DOI: 10.1594/pangaea.610978
title: Planktological-chemical observation in the water column at station M1_CTD128, Indian Ocean
DOI: 10.1594/pangaea.611018
title: Planktological-chemical observation in the water column at station M1_CTD176, Indian Ocean
DOI: 10.1594/pangaea.611047
title: Planktological-chemical observation in the water column at station M1_CTD226, Indian Ocean
DOI: 10.1594/pangaea.848923
title: Dissolved organic carbon in soil solution of the Jena Experiment (Main Experiment, year 2003)

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.762744
title: Biometric measurements of fish in the Eastfrisian Wadden Sea during POLARIS cruise PO0694

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.610981
title: Planktological-chemical observation in the water column at station M1_CTD131, Indian Ocean
DOI: 10.1594/pangaea.611049
title: Planktological-chemical observation in the water column at station M1_CTD232, Indian Ocean
DOI: 10.1594/pangaea.82213
title: Flux data of trap CH3-1
DOI: 10.1594/pangaea.729489
title: (Table T124) Chemical composition of basalts from Hole 191, Leg 19 (Bering Sea)
DOI: 10.1594/pangaea.854460
title: Phosphorus fractions in soil of the Jena Experiment (Main Experiment, year 2007)

description: This data set contains measurements of phosphorus fractions (Hedley fractions) in soil collected 2007 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. Soil sampling and analysis: Five independent soil samples per plot were taken in a depth of 0-15 cm using a soil corer with an inner diameter of 1 cm. The five samples per plot were combined to one composite sample per plot. A four-step sequential P fractionation (Hedley fractions) was applied. Sequentially, 20 ml NaHCO3 (adjusted to pH 8.5), 30 ml NaOH, and 35 ml HCl were used as extraction solutions for 0.5 g soil. The last step comprised the combustion (550 °C) of the remaining soil to destroy all organic material followed by shaking with 20 ml H2SO4. Organic P concentrations of the respective fractions were calculated as the difference between total dissolved P and inorganic P. Duplicate phosphate concentrations of P fractions in soil were measured photometrically (molybdenum blue-reactive P) with a Continuous Flow Analyzer (Bran&Luebbe, Germany).
description: Duplicate extractions of P fractions of selected samples yielded the following precision (as standard error of replicate analyses): NaHCO3-Pi 2.2 mg kg-1; NaHCO3-Po 1.6 mg kg-1; NaOH-Pi 5.3 mg kg-1; NaOH-Po 2.7 mg kg-1; and HCl 7.0 mg kg-1. In accordance with Negassa and Leinweber (2009), labile P refers to NaHCO3-Pi and -Po, moderately labile P to NaOH-Pi and -Po and stable P to HCl-P and H2SO4-P fractions.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".In addition to measurements of phosphorus fractions in soil determined from soil samples, measurements of total phosphorus in soil, measurements of dissolved phosphorus (organic, inorganic, and total) determined from bi-weekly soil solution samples, and measurement of dissolved inorganic phosphorus in soil solution aggregated to seasonal values are available.This datasets is part of a collection of soil phosphorus measurements in the Main Experiment since 2002 (doi:10.1594/PANGAEA.854466).
DOI: 10.1594/pangaea.746246
title: (Appendix C) Physical properties, grain size, and bulk mineralogy of ODP Site 108-659

description: Depth, sediment is composite depth (mcd)
DOI: 10.1594/pangaea.729413
title: (Table T96) Chemical composition of basalts from Hole 528, Leg 74 (Walvis Ridge, Atlantic Ocean)
DOI: 10.1594/pangaea.729417
title: (Table T101) Chemical composition of igneous rocks from ODP Hole 779A, Leg 125 (Conical Seamounts, Mariana Trench Region)
DOI: 10.1594/pangaea.745294
title: Seston properties for multinet station L2-20

description: Data acquired during the ORCAS project (Ocean Reef Coupling in the Andaman Sea) in cooperation with the Phuket Marine Biological Center, Thailand, funded by NRCT-DFG
DOI: 10.1594/pangaea.729689
title: (Table AT27) Abundance of major and trace elements in alkali basalts and hawaiites from ODP Hole 872B, Leg 144 (Lo-En Guyot, West Pacific Guyots)
DOI: 10.1594/pangaea.729691
title: (Table AT28) Abundance of major and trace elements in ankaramites from ODP Hole 874B, Leg 144 (Wodejebato Guyot, West Pacific Guyots)
DOI: 10.1594/pangaea.729414
title: (Table T97) Chemical composition of basalts from Hole 516F, Leg 72 (Rio Grande Rise, Atlantic Ocean)
DOI: 10.1594/pangaea.729416
title: (Table T99) Chemical composition of igneous rocks from ODP Hole 770C, Leg 124 (Celebes Sea, Pacific Ocean)
DOI: 10.1594/pangaea.729680
title: (Table AT19) Abundance of major and trace elements in basalts from ODP Hole 765D, Leg 123 (Argo Abyssal Plain, Indian Ocean)
DOI: 10.1594/pangaea.610985
title: Planktological-chemical observation in the water column at station M1_CTD135, Indian Ocean
DOI: 10.1594/pangaea.880324
title: Standing belowground plant biomass from the Jena Experiment (Main Experiment, year 2014)

description: This data set contains measurements of standing belowground 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, plots were weeded three times per year. Plot size was reduced to 5 x 6 m since 2010.In 2014, standing root biomass was sampled in June. Three soil cores with a 4.0 cm diameter per plot were taken to 40 cm depth and pooled plot-wise. The cores were immediately stored cool until further handling. For root washing, the bulk sample was soaked in water and then repeatedly rinsed with tap water over a 0.2 mm sieve. Remaining soil particles were removed by hand. Roots were dried at 60 - 70 °C and weighed subsequently. In 2014, soil cores were separated in depth increments of 0-5, 5-10, 10-20, 20-30 and 30 - 40 cm depth and the corresponding layers were pooled plot-wise. Roots were not seperated in coarse (diameter &gt; 2 mm) and fine roots and only total root biomass is shown in this dataset.
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 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).
DOI: 10.1594/pangaea.703249
title: (Appendix 1) Sedimentology and documentation of planktonic foraminiferal preservation in DSDP Hole 72-516F
DOI: 10.1594/pangaea.723896
title: (Table 1) U-Pb isotopic results of single-grain zircon and monazite analyses, ODP Hole 183-1137A, Elan Bank

description: At Elan Bank of the Kerguelen Plateau in the southeast Indian Ocean, Leg 183 of the Ocean Drilling Program recovered clasts of garnet-biotite gneiss in a fluvial conglomerate intercalated with basalt flows. U-Pb and Pb-Pb dates of zircons and monazites in these clasts and an overlying sandstone range from 534 to 2547 Ma, which is much older than the surrounding Indian Ocean seafloor. These dates show that old continental crust resides in the shallow crust of the oceanic Kerguelen Plateau and that the breakup of Gondwana dispersed continental fragments into the nascent Indian Ocean lithosphere.
description: All fractions consisted of single crystals or fragments of crystals; z = zircon, m = monazite.
description: Supplement to: Nicolaysen, Kirsten P; Bowring, Samuel A; Frey, Frederick A; Weis, Dominique A M; Ingle, Stephanie; Pringle, Malcolm S; Coffin, Millard F (2001): Provenance of Proterozoic garnet-biotite gneiss recovered from Elan Bank, Kerguelen Plateau, southern Indian Ocean. Geology, 29(3), 235-238