cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/622e-n675
title: NOAA/WDS Paleoclimatology - Pumijumnong - Wiang Pha - PIKE - ITRDB THA010

description: Interannual variability in the global land carbon sink is strongly related to variations in tropical temperature and rainfall. This association suggests an important role for moisture-driven fluctuations in tropical vegetation productivity, but empirical evidence to quantify the responsible ecological processes is missing. Such evidence can be obtained from tree-ring data that quantify variability in a major vegetation productivity component: woody biomass growth. Here we compile a pantropical tree-ring network to show that annual woody biomass growth increases primarily with dry-season precipitation and decreases with dry-season maximum temperature. The strength of these dry-season climate responses varies among sites, as reflected in four robust and distinct climate response groups of tropical tree growth derived from clustering. Using cluster and regression analyses, we find that dry-season climate responses are amplified in regions that are drier, hotter and more climatically variable. These amplification patterns suggest that projected global warming will probably aggravate drought-induced declines in annual tropical vegetation productivity. Our study reveals a previously underappreciated role of dry-season climate variability in driving the dynamics of tropical vegetation productivity and consequently in influencing the land carbon sink.
description: NOAA Template Raw Measurements file added 2022-04-04.
DOI: 10.15468/dl.zartk8
title: Occurrence Download

description: A dataset containing 25064 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "DatasetKey is EOD – eBird Observation Dataset",
 "Geometry POLYGON((-105.16037 39.57006,-104.77237 39.56032,-104.64121 39.92064,-105.30726 39.90905,-105.16037 39.57006))",
 "HasGeospatialIssue is false",
 "PublishingOrg is e2e717bf-551a-4917-bdc9-4fa0f342c530",
 "TaxonKey is Zenaida macroura",
 "Year 2020-2021"
 ]
}

 The dataset includes 25064 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0025094-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25921/6rjf-d488
title: NOAA/WDS Paleoclimatology - O'Connor fire data from Pinalenos_F11, Southeast Arizona - IMPD USF11001

description: In recent decades fire size and severity have been increasing in high elevation forests of the American Southwest. Ecological outcomes of these increases are difficult to gauge without an historical context for the role of fire in these systems prior to interruption by Euro-American land uses. Across the gradient of forest types in the Pinaleño Mountains, a Sky Island system in southeast Arizona that experienced two relatively large high-severity fires in the last two decades, we compared fire characteristics and climate associations before and after the onset of fire exclusion to determine the degree of similarity between past and recent fires. We use a gridded fire scar and demography sampling network to reconstruct spatially explicit estimates of fire extent and burn severity, as well as climate associations of fires from individual site to landscape scales from 1640 to 2008 C.E. We found that patterns of fire frequency, size, and severity were relatively stable for at least several centuries prior to 1880. A combination of livestock grazing and active fire suppression after circa 1880 led to (1) a significant reduction in fire spread but not fire ignition, (2) a conversion of more than 80% of the landscape from a frequent, low to mixed-severity fire regime to an infrequent mixed to high-severity fire regime, and (3) an increase in fuel continuity within a mid-elevation zone of dry mixed-conifer forest, resulting in increased opportunities for surface and crown fire spread into higher elevation mesic forests. The two most recent fires affecting mesic forests were associated with drought and temperature conditions that were not exceptional in the historical record but that resulted in a relative proportion of high burn severity up to four times that of previous large fires. The ecological effects of these recent fires appear to be more severe than any fire in the reconstructed period, casting uncertainty upon the recovery of historical species composition in high-severity burn patches. Significant changes to the spatial pattern, frequency, and climate associations of spreading fires after 1880 suggest that limits to fuel loading and fuel connectivity sustained by frequent fire have been removed. Coinciding factors of high fuel continuity and fuel loading, projected lengthening of the fire season, and increased variability in seasonal precipitation suggest that large high-severity fires, especially in mixed-conifer forests, will become the predominant fire type without aggressive actions to reduce fuel continuity and restore fire-resilient forest structure and species composition.
description: This dataset was contributed as part of the North American Tree-ring Fire Scar Synthesis (NAFSS) project (https://www.ncei.noaa.gov/access/paleo-search/study/34853). Data were contributed to the project from the original data generators.
DOI: 10.25921/6ysp-5w17
title: NOAA/WDS Paleoclimatology - O'Connor fire data from Pinalenos_F17, Southeast Arizona - IMPD USF17001

description: In recent decades fire size and severity have been increasing in high elevation forests of the American Southwest. Ecological outcomes of these increases are difficult to gauge without an historical context for the role of fire in these systems prior to interruption by Euro-American land uses. Across the gradient of forest types in the Pinaleño Mountains, a Sky Island system in southeast Arizona that experienced two relatively large high-severity fires in the last two decades, we compared fire characteristics and climate associations before and after the onset of fire exclusion to determine the degree of similarity between past and recent fires. We use a gridded fire scar and demography sampling network to reconstruct spatially explicit estimates of fire extent and burn severity, as well as climate associations of fires from individual site to landscape scales from 1640 to 2008 C.E. We found that patterns of fire frequency, size, and severity were relatively stable for at least several centuries prior to 1880. A combination of livestock grazing and active fire suppression after circa 1880 led to (1) a significant reduction in fire spread but not fire ignition, (2) a conversion of more than 80% of the landscape from a frequent, low to mixed-severity fire regime to an infrequent mixed to high-severity fire regime, and (3) an increase in fuel continuity within a mid-elevation zone of dry mixed-conifer forest, resulting in increased opportunities for surface and crown fire spread into higher elevation mesic forests. The two most recent fires affecting mesic forests were associated with drought and temperature conditions that were not exceptional in the historical record but that resulted in a relative proportion of high burn severity up to four times that of previous large fires. The ecological effects of these recent fires appear to be more severe than any fire in the reconstructed period, casting uncertainty upon the recovery of historical species composition in high-severity burn patches. Significant changes to the spatial pattern, frequency, and climate associations of spreading fires after 1880 suggest that limits to fuel loading and fuel connectivity sustained by frequent fire have been removed. Coinciding factors of high fuel continuity and fuel loading, projected lengthening of the fire season, and increased variability in seasonal precipitation suggest that large high-severity fires, especially in mixed-conifer forests, will become the predominant fire type without aggressive actions to reduce fuel continuity and restore fire-resilient forest structure and species composition.
description: This dataset was contributed as part of the North American Tree-ring Fire Scar Synthesis (NAFSS) project (https://www.ncei.noaa.gov/access/paleo-search/study/34853). Data were contributed to the project from the original data generators.
DOI: 10.5281/zenodo.17308408
title: manuscript_JVS-RES-06999

description: Abstract

QuestionsThe structure and dynamics of tropical forests face increasing pressures from historical land use and climate change. We asked: 1) Is there a significant difference in forest structure and species composition over 23 years? 2) Which tree species increases or decreases in density and/or basal area during this period? 3) Does drought exert a more pronounced effect on the tree community in more recently disturbed site?

LocationGuaxindiba State Ecological Station in São Francisco do Itabapoana (21°24’ S, 41°04’ W), Rio de Janeiro, Brazil.

MethodsOver 23 years, we monitored all trees with ≥10 cm DBH in four permanent 0.25 ha plots established in 1995 at each of two sites: one with signs of selective logging until 1960 (US60) and another selectively logged until 1990 (LS90). We assessed changes in basal area, density, species richness, evenness, and turnover, and calculated recruitment, mortality, and relative growth.  Climate variability was assessed using precipitation and temperature anomalies and maximum cumulative water deficit.

ResultsBoth sites showed slow recovery, with small increases in tree density and basal area and declines in species richness and evenness. Dominant species, such as Metrodorea nigra and Marlimorimia contorta, gained prominence, indicating a possible inhibitory role in the successional process. Recruitment decreased and mortality increased over time at both sites, possibly related to drought events. LS90 experienced greater species loss and structural changes compared to US60. Highlighting persistent selective logging legacies, exacerbated by recurrent droughts.

ConclusionsSelective logging and recurrent droughts created long-lasting impacts on SSAF, reducing resilience and slowing ecological recovery. Community trajectories converged toward floristic simplification, with drought-tolerant dominants displacing less resilient species. These findings underscore the vulnerability of seasonal tropical forests to compound disturbance and climate stress, emphasizing the need for targeted conservation to enhance resilience, sustain biodiversity, and preserve ecosystem services.

Keywords: Atlantic Forest, semi-deciduous forest, climate change, drought impacts, forest resilience, selective logging legacies, tropical forest dynamics, species richness and composition, biodiversity conservation, long-term monitoring
DOI: 10.25921/6cpm-kr44
title: NOAA/WDS Paleoclimatology - Denali Ice Core Major Ion and Trace Metal Data from 801 to 2013 CE

description: Future changes in North Pacific wintertime climate will be largely determined by the response of the Aleutian Low (ALow) pressure system to anthropogenic forcing. Although the ALow has intensified over the twentieth century, global climate model projections of future ALow variability are equivocal. In order to evaluate decadal to centennial ALow forcing mechanisms and provide context for the modern intensification, here we combine a new Denali ice core (Alaska) sea-salt sodium record with the Mount Logan ice core (Yukon) sodium record to develop a composite 1200 year record of ALow variability. The composite record indicates that the recent secular ALow intensification began circa 1741 and is unprecedented in magnitude and duration over the past millennium. North Pacific ice core snow accumulation and stable isotope records are consistent with this interpretation. The ALow intensification is associated with warming tropical Pacific sea surface temperatures, consistent with dynamic theory and instrumental correlations.
DOI: 10.25921/67f5-0y15
title: NOAA/WDS Paleoclimatology - Hartl - Höllengebirge, Salzberg C - FASY - ITRDB AUT122

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
DOI: 10.5281/zenodo.17308409
title: manuscript_JVS-RES-06999

description: Abstract

QuestionsThe structure and dynamics of tropical forests face increasing pressures from historical land use and climate change. We asked: 1) Is there a significant difference in forest structure and species composition over 23 years? 2) Which tree species increases or decreases in density and/or basal area during this period? 3) Does drought exert a more pronounced effect on the tree community in more recently disturbed site?

LocationGuaxindiba State Ecological Station in São Francisco do Itabapoana (21°24’ S, 41°04’ W), Rio de Janeiro, Brazil.

MethodsOver 23 years, we monitored all trees with ≥10 cm DBH in four permanent 0.25 ha plots established in 1995 at each of two sites: one with signs of selective logging until 1960 (US60) and another selectively logged until 1990 (LS90). We assessed changes in basal area, density, species richness, evenness, and turnover, and calculated recruitment, mortality, and relative growth.  Climate variability was assessed using precipitation and temperature anomalies and maximum cumulative water deficit.

ResultsBoth sites showed slow recovery, with small increases in tree density and basal area and declines in species richness and evenness. Dominant species, such as Metrodorea nigra and Marlimorimia contorta, gained prominence, indicating a possible inhibitory role in the successional process. Recruitment decreased and mortality increased over time at both sites, possibly related to drought events. LS90 experienced greater species loss and structural changes compared to US60. Highlighting persistent selective logging legacies, exacerbated by recurrent droughts.

ConclusionsSelective logging and recurrent droughts created long-lasting impacts on SSAF, reducing resilience and slowing ecological recovery. Community trajectories converged toward floristic simplification, with drought-tolerant dominants displacing less resilient species. These findings underscore the vulnerability of seasonal tropical forests to compound disturbance and climate stress, emphasizing the need for targeted conservation to enhance resilience, sustain biodiversity, and preserve ecosystem services.

Keywords: Atlantic Forest, semi-deciduous forest, climate change, drought impacts, forest resilience, selective logging legacies, tropical forest dynamics, species richness and composition, biodiversity conservation, long-term monitoring
DOI: 10.25921/6bk8-mg26
title: NOAA/WDS Paleoclimatology - Hartl - Nationalpark Kalkalpen, Rettenbachtal - LADE - ITRDB AUT139

description: 1.  Outbreaks of the larch budmoth (LBM) in the European Alps are among the most documented population cycles and their historical occurrence has been reconstructed over 1200 years.
 2.  Causes and consequences of cyclic LBM outbreaks are poorly understood and little is known about populations near the margin of the host's distribution range.
 3.  In the present study, we quantify historical LBM outbreaks and associated growth reductions in host trees (European larch). Tree-ring data collected from 18 sites between approximately 500 and 1700 m a.s.l. in the Northern pre-Alps are compared with data from the Western Alps and Tatra Mountains, as well as with nonhost Norway spruce.
 4.  Highly synchronized host and nonhost growth in the Northern pre-Alps shows that periodic LBM outbreaks are largely absent near the distributional limit of larch. By contrast, growth patterns in the Western Alps LBM core region are indicative of LBM events. Although climatic conditions in the Northern pre-Alps and Tatra Mountains would allow LBM outbreaks, low host plant abundance is likely the key driver for the absence of cyclic outbreaks in these regions.
 5.  The results obtained in the present study suggest that, in addition to the climatic conditions, host-species abundance is critically important for the occurrence of periodic LBM outbreaks and the determination of the respective outbreak range.
DOI: 10.25921/6mf9-0290
title: NOAA/WDS Paleoclimatology - Hartl - Nationalpark Kalkalpen, Schwarzkogel - PCAB - ITRDB AUT140

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
DOI: 10.25921/6ype-5d32
title: NOAA/WDS Paleoclimatology - Lucas - Isla Cristalina - SCBU - ITRDB URY001

description: Tree-ring research in the highland tropics and subtropics represents a major frontier for understanding climate-growth relationships. Nonetheless, there are many lowland regions – including the South American Pampa biome – with scarce tree ring data. We present the first two tree-ring chronologies for Scutia buxifolia in subtropical Southeastern South America (SESA), using 54 series from 29 trees in two sites in northern and southern Uruguay. We cross-dated annual rings and compared tree growth from 1950 to 2012 with regional climate variability, including rainfall, temperature and the Palmer Drought Severity Index – PDSI, the El Niño Southern Oscillation (ENSO) and the Southern Annular Mode (SAM). Overall, ring width variability was highly responsive to climate signals linked to water availability. For example, tree growth was positively correlated with accumulated rainfall in the summer-fall prior to ring formation for both chronologies. Summer climate conditions were key for tree growth, as shown by a negative effect of hot summer temperatures and a positive correlation with PDSI in late austral summer. The El Niño phase in late spring/early summer favored an increase in rainfall and annual tree growth, while the La Niña phase was associated with less rainfall and reduced tree growth. Extratropical climate factors such as SAM had an equally relevant effect on tree growth, whereby the positive phase of SAM had a negative effect over radial growth. These findings demonstrate the potential for dendroclimatic research and climate reconstruction in a region with scarce tree-ring data. They also improve the understanding of how climate variability may affect woody growth in native forests – an extremely limited ecosystem in the Pampa biome.
description: Rings were dated according to the Southern Hemisphere convention of assigning the year based on when ring formation began (Schulman, 1956).
DOI: 10.15468/dl.74sggn
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Galliformes)",
 "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 10,-110 10,-110 20,-120 20,-120 10))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0025097-251009101135966/datasets/export for details.
DOI: 10.25921/652g-sq38
title: NOAA/WDS Paleoclimatology - Hartl - Nationalpark Kalkalpen, Zöbelboden Süd - FASY - ITRDB AUT151

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
DOI: 10.25921/6xtb-pm69
title: NOAA/WDS Paleoclimatology - Hartl - Berchtesgaden, Malerwinkel - FASY - ITRDB DEU359

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
DOI: 10.25921/69mn-jj39
title: NOAA/WDS Paleoclimatology - Hartl - Oberammergau, Laichwald A - PCAB - ITRDB DEU366

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
DOI: 10.15468/dl.vgxb74
title: Occurrence Download

description: A dataset containing 10729 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "Geometry POLYGON((8.40334 46.25539,8.88647 45.79676,9.03001 45.80026,9.3486 46.39543,9.55166 46.27289,9.86675 46.2834,10.1212 46.20166,10.19234 46.17487,10.20284 46.50746,10.48642 46.44444,10.47241 47.0361,9.86324 46.95908,9.47114 47.06411,8.81645 46.76653,8.53449 46.51151,8.40334 46.25539))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is one of (Squamata, Testudines)",
 "Year 2001-2025"
 ]
}

 The dataset includes 10729 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0025095-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25921/6y2g-w436
title: NOAA/WDS Paleoclimatology - Hartl - Schliersee, Hausberg-Alm unten - PCAB - ITRDB DEU412

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