cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15156/bio/sh1408152.10fu
title: SH1408152.10FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.15156/bio/sh1408153.10fu
title: SH1408153.10FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.25921/7vkp-yy63
title: NOAA/WDS Paleoclimatology - Zgraggen - StBernard - FASY - ITRDB SWIT207

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives.  Most data sets include raw treering measurements (most are annual ring width, with some collections of earlywood or latewood width or wood density), plus chronologies (standardized growth indices for a site compiled from multiple treering samples). Reconstructions of climate variables are included with some of these data sets.  Each data type is stored in a separate data file; the data type is coded into the file name. For details please see: http://www.ncdc.noaa.gov/paleo/treeinfo.htmll
description: NOAA Template Raw Measurements file added 2019-02-05.
DOI: 10.25921/702m-1h62
title: NOAA/WDS Paleoclimatology - Treydte - Rama Valley - JUTU - ITRDB PAKI013

description: We present an analysis of 28 juniper tree-ring sites sampled over the last decades by several research teams in the Tien Shan and Karakorum mountains of western central Asia. Ring-width chronologies were developed on a site-by-site basis, using a detrending technique designed to retain low-frequency climate variations. Site chronologies were grouped according to their distance from the upper timberline in the Tien Shan (~3,400 m a.s.l.) and Karakorum (~4,000 m), and low- and high-elevation composite chronologies combining data from both mountain systems developed. Comparison of these elevational subsets revealed significant coherence (r = 0.72) over the 1438–1995 common period, which is inconsistent with the concept of differing environmental signals captured in tree-ring data along elevational gradients. It is hypothesized that the uniform growth behavior in central Asian juniper trees has been forced by solar radiation variations controlled via cloud cover changes, but verification of this assumption requires further fieldwork. The high-elevation composite chronology was further compared with existing temperature reconstructions from the Karakorum and Tien Shan, and long-term trend differences discussed. We concluded that the extent of warmth during medieval times cannot be precisely estimated based on ring-width data currently available.
description: 
# Purpose of Collection: 
# Dendroclimatology
# 
# Cores and cross-sections are stored at: 
# WSL
#  NOAA Template Raw Measurements file added 2019-04-08.
DOI: 10.25921/7j6v-cm83
title: NOAA/WDS Paleoclimatology - Esper - Pakistan high Sat2 - JUSP - ITRDB PAKI015

description: We present an analysis of 28 juniper tree-ring sites sampled over the last decades by several research teams in the Tien Shan and Karakorum mountains of western central Asia. Ring-width chronologies were developed on a site-by-site basis, using a detrending technique designed to retain low-frequency climate variations. Site chronologies were grouped according to their distance from the upper timberline in the Tien Shan (~3,400 m a.s.l.) and Karakorum (~4,000 m), and low- and high-elevation composite chronologies combining data from both mountain systems developed. Comparison of these elevational subsets revealed significant coherence (r = 0.72) over the 1438–1995 common period, which is inconsistent with the concept of differing environmental signals captured in tree-ring data along elevational gradients. It is hypothesized that the uniform growth behavior in central Asian juniper trees has been forced by solar radiation variations controlled via cloud cover changes, but verification of this assumption requires further fieldwork. The high-elevation composite chronology was further compared with existing temperature reconstructions from the Karakorum and Tien Shan, and long-term trend differences discussed. We concluded that the extent of warmth during medieval times cannot be precisely estimated based on ring-width data currently available.
description: Purpose of Collection: 
# Dendroclimatology
# 
# Cores and cross-sections are stored at: 
# WSL
#  NOAA Template Raw Measurements file added 2019-04-08.
DOI: 10.25921/7t7k-rx13
title: NOAA/WDS Paleoclimatology - Mafia Archipelago, Tanzania 17th and 20th Century Diploastrea Coral d18O

description: The slowly growing coral Diploastrea heliopora affords a novel opportunity to obtain multicentury records of paleoclimate, including details of the interannual rhythms associated with the El Nino-Southern Oscillation (ENSO) system. We examine climate variability in an ENSO-teleconnected region using new oxygen isotope records from D. heliopora, spanning most of the twentieth (1896-1998) and seventeenth (1622-1722) centuries, from the Mafia archipelago, Tanzania. The modern record demonstrates coherency with relevant instrumental and proxy time series, documents twentieth century warming, and displays significant power at ENSO periodicities. The seventeenth century record lacks any trend, exhibits interannual variance comparable to the modern record, and displays a pronounced interdecadal signal not evident in the twentieth century that correlates with other tropical and hemispheric climate records. We find no clear evidence of solar irradiance influence on interannual variability in the western Indian Ocean during these intervals, although the mean sea surface temperature appears to vary inversely with insolation.
description: This dataset includes d18O values and anomalies from a coral that grew in the tropical western Indian Ocean, in Tanzania's Mafia archipelago. Data span the 20th century at monthly resolution and the interval of 1622-1721 at bimonthly resolution. Anomalies were calculated by subtracting the mean value for the 1 or 2 month period as appropriate for dataset resolution. These data originate from a single colony of Diploastrea heliopora cored in July 2000 at Fungu Mrima Reef in the Mafia Archipelago of Tanzania. We slabbed and X-rayed the core and characterized the growth geometry using SEM. We sampled the columella portion of the skeleton at 0.25 mm (for the 20th-century) and 0.5 mm (for the 17th century) depth intervals using a diamond-encrusted drill bit. We assigned ages to the samples based on density banding and isotopic seasonality, assuming d18O maxima fell in August (the coldest month). We estimate the age uncertainty for the 20th century interval as ~±1yr and for the older interval at ~±5yr. Fungu Mrima Reef, Mafia Archipelago, Tanzania: 8°1'S, 39°30'E, water depth 6m.
DOI: 10.15468/dl.m37nyp
title: Occurrence Download

description: A dataset containing 7058 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Caprimulgiformes)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1980",
 "OccurrenceStatus is Present",
 {
 "not" : {
 "BasisOfRecord" : [
 "is one of (Fossil, Living Specimen)"
 ]
 }
 },
 "Geometry POLYGON((-120 50,-110 50,-110 60,-120 60,-120 50))"
 ]
}

 The dataset includes 7058 records from 10 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0025113-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25921/7qqb-w572
title: NOAA/WDS Paleoclimatology - Eastern Equatorial Pacific 150KYr d15N and Corg Data

description: High-resolution downcore records of bulk sediment nitrogen isotopes (d15N) and organic carbon (Corg) contents from  multiple Eastern Tropical Pacific sites show remarkable uniformity during the last glacial stage, whereas during the Holocene and the last interglacial period, they diverge significantly. The close covariation of d15N records during glacial stages points toward regional changes in the background isotopic signal of the inorganic nitrate pool, likely caused by variations in the denitrification rates in the nearby suboxic zones. On the other hand, we attribute the divergence of the d15N and Corg records during interglacial periods to a spatial reorganization in the equatorial divergence. We posit a southward displacement of the zone of strongest upwelling in the South Equatorial Current to explain the reduced productivity and higher nitrate consumption recorded at the equator during warmer intervals.
description: The data set contains bulk sediment d15N and Corg content 
from 4 cores from the eastern equatorial Pacific covering 
the late Quaternary.  The sedimentary d15N composition 
of all cores was analyzed at UBC, Vancouver, following 
standard procedures.  Total carbon was determined with an 
elemental analyzer. Inorganic (i.e., carbonate mineral) 
carbon was determined in a carbon dioxide coulometer.  
Organic carbon was estimated by subtracting inorganic 
from total carbon. Results for the last 35 kyr have been 
published by Kienast et al. (2006, 2007).  Age models 
for the last 25 kyr are based on radiocarbon dates and 
were adopted as previously published (see Dubois et al., 
2011 and references therein). For ages older than 25 kyr BP, 
the age models of cores ME0005A-27JC, TR163-19P and TR163-31P 
are based on oxygen isotope stratigraphy (correlation to the 
global benthic stack LR04 (Lisiecki and Raymo, 2005)), 
and the presence of an ash layer (Los Chocoyos Ash Layer 
(Drexler et al., 1980)). The age model of core ME0005A-24JC 
is modified from Lyle et al. (2005), with additional 
correlation points to the opal, CaCO3 and SST records 
of core ME0005A-27JC (previously published by 
Dubois et al. (2010, 2011)).
DOI: 10.25921/70b3-9742
title: NOAA/WDS Paleoclimatology - Jacoby - 412/Noatak - PCGL - ITRDB AK109

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives.  Most data sets include raw treering measurements (most are annual ring width, with some collections of earlywood or latewood width or wood density), plus chronologies (standardized growth indices for a site compiled from multiple treering samples). Reconstructions of climate variables are included with some of these data sets.  Each data type is stored in a separate data file; the data type is coded into the file name. For details please see: http://www.ncdc.noaa.gov/paleo/treeinfo.htmll
description: 
# 
#  NOAA Template Raw Measurements file added 2019-02-08.
DOI: 10.25921/79d8-1b31
title: NOAA/WDS Paleoclimatology - Wilson - St. Emmeram Church Regensburg - PCAB - ITRDB GERM111

description: This paper presents a 500 year March-August precipitation reconstruction for the Bavarian Forest region of southeast Germany based on a composite, well-replicated data set of 676 living and historical tree-ring width series from Norway spruce. Two versions of the chronology are developed. The cubic smoothing spline (SPL) chronology, standardized with a fixed 80 year spline function, retains decadal and higher frequency variation. The regional curve standardization (RCS) chronology uses regional curve standardization to retain additional lower frequency variation from the same data. Calibration (1879-1978) of these chronologies with March-August precipitation indicates they explain 40% (SPL) and 34% (RCS) of the variability in the instrumental precipitation record. The SPL reconstruction models the high frequency variation better, whereas the RCS reconstruction tracks the low-frequency trends more robustly. It suggests that spring-summer precipitation was above the long-term average for the periods 1730-1810 and 1870-2000, about average between 1560 and 1610 and that significantly drier periods occurred during 1510-60, 1610-35, 1660-1730 and 1830-70. The low-frequency trends of the RCS reconstruction during the 19th century were verified by comparison with a regional precipitation series derived from 14 long precipitation records from central Europe. Better verification results were obtained using the original (non-homogenized) records over this interval. These results suggest that some low-frequency variability may have been removed during correction of these early records. Periods of synchronous decadal variability were observed between the SPL series and independent dendroclimatic reconstructions from central Europe. The RCS reconstruction is the first dendroclimatic precipitation reconstruction in Europe to capture low-frequency information. These long-term trends, however, are difficult to verify owing to the paucity of other proxy precipitation records in central Europe that portray low-frequency information. Further verification and testing of the RCS reconstruction will require the development of additional reconstructions from tree-rings (or other proxy data series) that similarly target low-frequency variability.
description: NOAA Template Raw Measurements file added 2019-02-05. July 2024: Elevation added by WDS-Paleo using get_elev_point() from the elevatr R package with the AWS Terrain Tiles (aws) and WGS 84 reference frame.
DOI: 10.25921/7hkr-2c42
title: NOAA/WDS Paleoclimatology - Frank - Kiruna KW - PISY - ITRDB SWED331

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives.  Most data sets include raw treering measurements (most are annual ring width, with some collections of earlywood or latewood width or wood density), plus chronologies (standardized growth indices for a site compiled from multiple treering samples). Reconstructions of climate variables are included with some of these data sets.  Each data type is stored in a separate data file; the data type is coded into the file name. For details please see: http://www.ncdc.noaa.gov/paleo/treeinfo.htmll
description: NOAA Template Raw Measurements file added 2019-02-05.
DOI: 10.15468/dl.ng297c
title: Occurrence Download

description: A dataset containing 2758 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Caprimulgiformes)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1980",
 "OccurrenceStatus is Present",
 {
 "not" : {
 "BasisOfRecord" : [
 "is one of (Fossil, Living Specimen)"
 ]
 }
 },
 "Geometry POLYGON((-110 50,-100 50,-100 60,-110 60,-110 50))"
 ]
}

 The dataset includes 2758 records from 4 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0025116-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25921/7wzn-8a20
title: NOAA/WDS Paleoclimatology - Eastern Equatorial Pacific ODP849 85KYr Radionuclide and Major Element Data

description: The (231Pa/230Th)xs,0 records obtained from two cores from the western (MD97-2138; 1°25'S, 146°24'E, 1900 m) and eastern (Ocean Drilling Program Leg 138 Site 849, 0°11.59'N, 110°31.18'W, 3851 m) equatorial Pacific display similar variability over the last 85,000 years, i.e., from isotopic stages 1 to 5a, with systematically higher values during the Holocene, isotopic stage 3, and isotopic stage 5a, and lower values, approaching the production rate ratio of the two isotopes (0.093), during the colder periods corresponding to isotopic stages 2 and 4. We have also measured the 230Th-normalized biogenic preserved and terrigenous fluxes, as well as major and trace elements concentrations, in both cores. The (231Pa/230Th)xs,0 results combined with the changes in preserved carbonate and opal fluxes at the eastern site indicate lower productivity in the eastern equatorial Pacific during glacial periods. The (231Pa/230Th)xs,0 variations in the western equatorial Pacific also seem to be controlled by productivity (carbonate and/or opal). The generally high (231Pa/230Th)xs,0 ratios (>0.093) of the profile could be due to opal and/or MnO2 in the sinking particles. The profiles of (231Pa/230Th)xs,0 and 230Th-normalized fluxes indicate a decrease in exported carbonate, and possibly opal, during isotopic stages 2 and 4 in MD97-2138. Using 230Th-normalized flux, we also show that sediments from the two cores were strongly affected by sediment redistribution by bottom currents suggesting a control of mass accumulation rates by sediment focusing variability.
description: 230Th, 231Pa, 232Th, 238U activities, (231Pa/230Th)xs,0 ratio, 
opal, carbonate, MnO2 and major elements concentrations for ODP849. 
Radionuclide concentrations were obtained by isotope dilution 
SF-ICP-MS. Major elements concentrations were measured by ICP-AES. 
Opal, carbonate and MnO2 were determined by normative calculations. 
Age model is based on oxygen isotope stratigraphy on Cibicides 
wuellerstorfi (Mix et al., 1995).
DOI: 10.25921/7e74-k316
title: NOAA/WDS Paleoclimatology - Lake Allos, French Alps 1360 Year Flood Deposit Data

description: Investigation of Lake Allos sediments revealed ~160 graded layers, interpreted as flood deposits, over the last 1400 yr. Comparisons with records of historic floods support the interpretation of flood deposits and suggest that most recorded flood events are the result of intense meso-scale precipitation events. As there is no evidence for any major changes in erosion processes in the catchment since the Medieval Warm Period (MWP), we interpret the Allos record in terms of repeated intense precipitation events over the last millennium, with a low flood frequency during the MWP and more frequent and more intense events during the Little Ice Age. This interpretation is consistent with the pattern of increasingly humid conditions in the northwestern Mediterranean region. This long-term trend is superimposed on high frequency oscillations that correlate with solar activity and autumnal North Atlantic Oscillation (NAO). Finally, a comparison of flood records across the northwestern Mediterranean region showed that intense precipitation events in Allos (east of the Rhône Valley) were out of phase with events in the Cévennes (west of the Rhône) but in phase with events in eastern Spain. Supported by meteorological analyses, this suggests an oscillation in atmospheric circulation patterns over the northwestern Mediterranean.
description: Annual flood deposit thickness data from Lake Allos, Mediterranean 
French Alps, for the past 1360 years. The Lake Allos sediment sequence 
consists of 160 normally graded beds containing markers indicating 
an allochtonous origin for the sediment (terrestrial macro-remains 
and Ca-enrichment).  These beds are interpreted as flood deposits, 
associated with extreme precipitation events in the northwest 
Mediterranean region. Grain size analysis (Malvern Mastersizer S) 
was conducted on core ALO09P13, retrieved from the northern basin 
of the lake. Sampling was at a continuous interval of 5 mm.  

Lake Allos, Mediterranean French Alps: 
44°14.16'N, 6°42.55'E, 2230m elevation, 20m water depth.
DOI: 10.25921/7tv8-jr71
title: NOAA/WDS Paleoclimatology - Southern Ocean ODP745 Miocene-Pleistocene d15N Data

description: We use bulk sediment d15N values and opal and carbon mass accumulation rates (MAR) to reconstruct nutrient utilization and export productivity at Ocean Drilling Program Site 745 (Antarctic Zone of the Southern Ocean) spanning the late Miocene through early Pleistocene (~6.5-1.4 Ma). We investigate whether early Pliocene climatic warmth and subsequent cooling can be related to changes in high latitude productivity. Results indicate that d15N values increase to above late Holocene levels from the late Miocene through the late Pliocene (6.5 to 2 Ma). Opal and carbon MARs are low during the early Pliocene. Relatively high d15N together with low export production is consistent with a more southerly position of the Polar Frontal Zone (PFZ) allowing the expansion of nitrate depleted, low nutrient upper waters south toward Site 745. The interpretation is supported by a relatively small d15N gradient between Site 745 and a site in the Subantarctic Zone of the Southern Ocean (Site 1090). There are no unique changes in the Site 745 d15N values or export productivity at 2.7 Ma. During the late Pliocene to early Pleistocene climate transition (between ~2.1 and at 1.7 Ma), d15N values display large variations approaching those observed during the last glacial to interglacial transition in this latitude band. Opal and carbon MARs also show large fluctuations, but in the opposite sense with maxima corresponding to minima in the d15N record and vice versa. The pattern of high d15N values associated with low export production may reflect changes in nutrient utilization in response to changes in water column stratification once the PFZ has moved north of the location of Site 745. Our results provide a mechanism for enhancing early Pliocene CO2 concentrations via reduced uptake of CO2 due to low productivity in the Southern Ocean. Once the PFZ has moved north, the region may have become sensitive to changes in water column stratification, potentially contributing to fluctuations in CO2.
description: Bulk sediment d15N values from ODP Site 745 in the Antarctic Zone of the Southern Ocean 
for 6.5 - 1.4 ma, to assess potential changes in nitrate utilization and export production 
from the late Miocene through early Pleistocene.  The temporal resolution is about 30-75 kyr. 
Approximately 1 g of sediment was freeze dried, ground with a mortar and pestle into a fine powder, 
and homogenized. About 90-100 mg of the thus prepared bulk sediment was weighed out into tin cups. 
Approximately 10 mg of powdered tin was added to each sample to aid with combustion given the low 
organic matter concentrations. Samples were then analyzed at the Stroud Water Research Center
on a Thermo-Finnigan DeltaPlus XP Isotope Ratio Mass Spectrometer (IRMS) with Conflo III 
interfaced in continuous flow mode to a Costech 4010 CHNS-O Elemental Analyzer (EA).