cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.885414
title: Lime content from the Jena Experiment (Main Experiment, year 2002)

description: This data set contains measurements of lime content in the soil, i. e. percentage of CaCO3. 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.Lime content was determined from undisturbed soil cores at 27 locations distributed throughout the experimental site in spring 2002 before plot establishment. Two of the locations are now reference plots and thus not included in this data set. Soil cores were taken to 100 cm depth and separated in depth increments with a resolution of ten cm from ground level to 40 cm depth and 20 cm from 40 cm to 100 cm depth. The bulk material was passed through a sieve with 2 mm mesh size and only fine soil was used for the investigation of lime content. Percentage of CaCO3 for every sample was then determined at the laboratory for geoecology of Jena University as volumetric determination according to DIN 19684-5.
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 physical and chemical soil properties 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.885439).
DOI: 10.1594/pangaea.762975
title: (Table 2) Contents and composition of n-alkanes in surface layer bottom sediments from the mouth of the North Dvina River and the southern part of the Dvina Bay, White Sea (October 2001)
DOI: 10.1594/pangaea.82488
title: Makrozooplankton at ALOHA Station during cruise HOT-62

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.610970
title: Planktological-chemical observation in the water column at station M1_CTD115, Indian Ocean
DOI: 10.1594/pangaea.730164
title: (Table 21) Abundance of major elements in basalts with variation of TiO2 contents from 1.30 to 1.80%, Gulf of California, DSDP Hole 65-485A
DOI: 10.1594/pangaea.728922
title: (Table T26) Chemical composition of basalts from Hole 483B, Leg 65 (Gulf of California, Pacific Ocean)
DOI: 10.1594/pangaea.777749
title: Macroinvertebrate abundance in montane tropical streams of varying land-use, Ecuador

description: Despite the importance of tropical montane cloud forest streams, studies investigating aquatic communities in these regions are rare and knowledge on the driving factors of community structure is missing. The objectives of this study therefore were to understand how land-use influences habitat structure and macroinvertebrate communities in cloud forest streams of southern Ecuador. We evaluated these relationships in headwater streams with variable land cover, using multivariate statistics to identify relationships between key habitat variables and assemblage structure, and to resolve differences in composition among sites. Results show that shading intensity, substrate type and pH were the environmental parameters most closely related to variation in community composition observed among sites. In addition, macroinvertebrate density and partly diversity was lower in forested sites, possibly because the pH in forested streams lowered to almost 5 during spates. Standard bioindicator metrics were unable to detect the changes in assemblage structure between disturbed and forested streams. In general, our results indicate that tropical montane headwater streams are complex and heterogeneous ecosystems with low invertebrate densities. We also found that some amount of disturbance, i.e. patchy deforestation, can lead at least initially to an increase in macroinvertebrate taxa richness of these streams.
description: This work was funded by the Deutsche Forschungsgemeinschaft DFG in the frame of the project FOR816 "Biodiversity and Sustainable Management of a Megadiverse Mountain Ecosystem in South Ecuador".
description: Supplement to: Bücker, Amelie; Sondermann, Martin; Frede, Hans-Georg; Breuer, Lutz (2010): The influence of land-use on macroinvertebrate communities in montane tropical streams - a case study from Ecuador. Fundamental and Applied Limnology, 177(4), 267-282
DOI: 10.1594/pangaea.82468
title: Makrozooplankton at ALOHA Station during cruise HOT-126

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.82515
title: Makrozooplankton at ALOHA Station during cruise HOT-89

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.729750
title: (Table AT40) Abundance of major and trace elements in igneous rocks from ODP Hole 1136A, Leg 183 (Kerguelen Plateau, Indian Ocean)
DOI: 10.1594/pangaea.729756
title: (Table AT46) Abundance of major and trace elements in basalts from ODP Hole 713A, Leg 115 (Chagos Bank, West Indian Ocean)
DOI: 10.15468/dl.3krm5p
title: Occurrence Download

description: A dataset containing 5219 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Artemisia capillaris"
 ]
}

 The dataset includes 5219 records from 172 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0044025-250827131500795/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.82518
title: Makrozooplankton at ALOHA Station during cruise HOT-92

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.729752
title: (Table AT42) Abundance of major and trace elements in igneous rocks from ODP Hole 1138A, Leg 183 (Kerguelen Plateau, Indian Ocean)
DOI: 10.1594/pangaea.82509
title: Makrozooplankton at ALOHA Station during cruise HOT-83

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: 10.15468/dl.k2nnnn
title: Occurrence Download

description: A dataset containing 4486 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Asparagopsis armata",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Geometry POLYGON ((40.81373 29.26705, 40.81373 50.94, -6.6 50.94, -6.6 29.26705, 40.81373 29.26705))",
 "BasisOfRecord is one of (Human Observation, Machine Observation, Observation, Material sample)"
 ]
}

 The dataset includes 4486 records from 52 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0044024-250827131500795/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.776004
title: (Table T2) Stable iron isotope ratios and amount of iron extracted by different methods from ODP Site 207-1260 sediments

description: Fe isotope measurements are presented for 10 samples from the Cenomanian-Turonian black shale unit in Hole 1260B at Demerara Rise. The samples bracket the latest Cenomanian ocean anoxic event and were selected to ascertain whether Fe isotopes can be used to gain a better understanding of oceanic redox conditions during the mid-Cretaceous. Three extraction procedures were used to provide Fe extracts that represent the Fe oxide (average FeCBD = 0.07 wt%, N = 8), Fe oxide-sulfide-carbonate (average FeAR = 0.34 wt%, N = 10), and total Fe fractions (average FeHF = 0.81 wt%, N = 10). Fe isotope measurements were conducted on all FeAR extracts as a priority as these were considered to best reflect changes in the redox environment. d56Fe values range between 0.02 per mil ± 0.09 per mil and -0.77 per mil ± 0.05 per mil and appear to correlate negatively with the C/N ratio and oxygen index of total organic carbon. Isotopic measurements of two Fe oxide (FeCBD) extracts show a much heavier isotopic composition (d56Fe = 0.74 per mil ± 0.08 per mil and 0.63 per mil ± 0.04 per mil), which suggests isotopic partitioning between different mineral components in the sediment.
description: Sediment depth is given in mcd. Note: the amount of sample digested with Na citrate-Na bicarbonate-dithionite method is negligible.
description: Supplement to: Clayton, Robin E; Nederbragt, Alexandra J; Malinovsky, Dmitry; Andersson, Per S; Thurow, Juergen W (2007): Data report: iron isotope geochemistry of mid-Cretaceous organic-rich sediments at Demerara Rise (ODP Leg 207). In: Mosher, DC; Erbacher, J; Malone, MJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 207, 1-14
DOI: 10.1594/pangaea.82454
title: Makrozooplankton at ALOHA Station during cruise HOT-112

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.610982
title: Planktological-chemical observation in the water column at station M1_CTD132, Indian Ocean
DOI: 10.1594/pangaea.729688
title: (Table AT26) Abundance of major and trace elements in basanites from ODP Hole 871C, Leg 144 (Limalok Guyot, West Pacific Guyots)
DOI: 10.1594/pangaea.745290
title: Seston properties for multinet station L2-08

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.745293
title: Seston properties for multinet station L2-18

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.76044
title: Plankton biomass of mocness net M44/4_D-MOC270
DOI: 10.1594/pangaea.82525
title: Makrozooplankton at ALOHA Station during cruise HOT-99

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.394475
title: Zooplankton biomass at Sedlo Seamount of MOCNESS net tow station M60/1_724

description: Samples L2 and L6 were taken 100 m above ground. Depth, water was calculated between event depth (elevation) and depth above ground.
DOI: 10.1594/pangaea.76041
title: Plankton biomass of mocness net M44/4_D-MOC266
DOI: 10.1594/pangaea.611042
title: Planktological-chemical observation in the water column at station M1_CTD220, Indian Ocean
DOI: 10.1594/pangaea.729062
title: (Table T62) Chemical composition of ankaramites from ODP Hole 874B, Leg 144 (Wodejebato Guyot, West Pacific Guyots)
DOI: 10.1594/pangaea.610975
title: Planktological-chemical observation in the water column at station M1_CTD125, Indian Ocean
DOI: 10.1594/pangaea.854994
title: Plant height along the plant diversity gradient in the Jena Experiment (Main Experiment, year 2003)

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.
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 plant height 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.855002).
DOI: 10.1594/pangaea.611031
title: Planktological-chemical observation in the water column at station M1_CTD200, Indian Ocean
DOI: 10.1594/pangaea.854996
title: Plant height along the plant diversity gradient in the Jena Experiment (Main Experiment, year 2005)

description: This data set contains measurements of plant height: vegetative height (heighest leaf) and regenerative height (heighest flower) in 2005 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 2005, plant height was recorded twice a year just before biomass harvest (during peak standing biomass in late May and in late August). For target plant individuals at 10 points separated by 1 m each along a transect in the central area in the plots, vegetative height (heighest leaf) and regenerative height (heighest flower) were measured as standing height (without stretching the plant). Provided are the individual measurements and the mean over the measured plants.
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 plant height 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.855002).
DOI: 10.1594/pangaea.854361
title: Total nitrogen from solid phase in the Jena Experiment (Block 2 Main Experiment up to 100cm depth, year 2007)

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. Stratified soil sampling to a depth of 1m was repeated in April 2007 (as had been done 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. Because of much higher proportions of roots in the soil, the samples in 2007 were further sieved to 1 mm according to common root removal methods. No additional mineral particles were removed by this procedure. 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.854997
title: Plant height along the plant diversity gradient in the Jena Experiment (Main Experiment, year 2006)

description: This data set contains measurements of plant height: vegetative height (heighest leaf) and regenerative height (heighest flower) in 2006 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 2006, plant height was recorded twice a year just before biomass harvest (during peak standing biomass in late May and in late August). For target plant individuals at 10 points separated by 1 m each along a transect in the central area in the plots, vegetative height (heighest leaf) and regenerative height (heighest flower) were measured as standing height (without stretching the plant). In 2006, also the plots of the management experiment, that altered mowing frequency and fertilized subplots (see further details below) were sampled by measuring vegatation height five times, every 1m on a 5m transekt along the side of the management plots. Provided are the individual measurements and the mean over the measured plants.
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 plant height 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.855002).
DOI: 10.1594/pangaea.854365
title: Mineral nitrogen from KCl extractions of soil from the Jena Experiment (Main Experiment up to 30cm depth, year 2002)

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 September 2002. 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).