cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5281/zenodo.14599765
title: A Database for Automatic Identification of Herbarium Specimens in Piperaceae Family

description: This is the first version of a herbarium specimen dataset for the Piperaceae family. It contains 10,503 samples distributed across 236 species of Piperaceae collected in Brazil. These samples were selected from the speciesLink repository and are part of the collection of 38 herbaria. They were identified by a team of 11 specialists in Piperaceae.

Among the 10,503 images of Piperaceae, 7,678 (73.10%) belong to the genus Piper L., 2,806 (26.72%) to the genus Peperomia Ruiz & Pav., and 19 (0.18%) to the genus Manekia Trelease. The dataset includes 156 species of Piper L., 79 species of Peperomia Ruiz & Pav., and a single species of Manekia Trel.

A comprehensive set of experiments evaluated segmentation, feature extraction, and classification algorithms for the dataset performance as reference values. The source code for the experiments is available on GitHub.

The metadata includes information about the herbarium that physically stores the specimen and the Brazilian region where the plant was collected. The file original.zip contains the images in their original version without any processing. The files grayscale.zip and rgb.zip contain the images in three dimensions (256 x 256, 400 x 400, and 512 x 512 pixels), organized into three folders for each size::



jpeg: The resized exsiccatae images.

mask: The masks predicted by the U-Net model.

segmented: The images with the background removed.
DOI: 10.5281/zenodo.14599766
title: A Database for Automatic Identification of Herbarium Specimens in Piperaceae Family

description: This is the first version of a herbarium specimen dataset for the Piperaceae family. It contains 10,503 samples distributed across 236 species of Piperaceae collected in Brazil. These samples were selected from the speciesLink repository and are part of the collection of 38 herbaria. They were identified by a team of 11 specialists in Piperaceae.

Among the 10,503 images of Piperaceae, 7,678 (73.10%) belong to the genus Piper L., 2,806 (26.72%) to the genus Peperomia Ruiz & Pav., and 19 (0.18%) to the genus Manekia Trelease. The dataset includes 156 species of Piper L., 79 species of Peperomia Ruiz & Pav., and a single species of Manekia Trel.

A comprehensive set of experiments evaluated segmentation, feature extraction, and classification algorithms for the dataset performance as reference values. The source code for the experiments is available on GitHub.

The metadata includes information about the herbarium that physically stores the specimen and the Brazilian region where the plant was collected. The file original.zip contains the images in their original version without any processing. The files grayscale.zip and rgb.zip contain the images in three dimensions (256 x 256, 400 x 400, and 512 x 512 pixels), organized into three folders for each size::



jpeg: The resized exsiccatae images.

mask: The masks predicted by the U-Net model.

segmented: The images with the background removed.
DOI: 10.1594/pangaea.133974
title: Carbon and nitrogen data of sediment core GeoB6516-3
DOI: 10.5281/zenodo.14708053
title: Planar π-extended cycloparaphenylenes featuring an all-armchair edge topology

description: The [n]cycloparaphenylenes ([n]CPPs)—n para-linked phenylenes that form a closed-loop—have attracted substantial attention due to their unique cyclic structure and highly effective para-conjugation leading to a myriad of fascinating electronic and optoelectronic properties. However, their strained topology prevents the π-extension of CPPs to convert them either into armchair nanobelts or planarized CPP macrocycles. Here we successfully tackle this long-standing challenge and present the bottom-up synthesis and characterization of atomically precise in-plane π-extended [12]CPP on Au(111) by low-temperature scanning probe microscopy and spectroscopy combined with density functional theory. The planar π-extended CPP is a nanographene with an all-armchair edge topology. The exclusive para-conjugation at the periphery yields delocalized electronic states and the planarization maximizes the overlap of p orbitals, which both reduce the bandgap compared to conventional CPPs. Calculations predict ring currents and global aromaticity in the doubly charged system. The intriguing planar ring topology and unique electronic properties make planar π-extended CPPs promising quantum materials.
DOI: 10.5281/zenodo.14708054
title: Planar π-extended cycloparaphenylenes featuring an all-armchair edge topology

description: The [n]cycloparaphenylenes ([n]CPPs)—n para-linked phenylenes that form a closed-loop—have attracted substantial attention due to their unique cyclic structure and highly effective para-conjugation leading to a myriad of fascinating electronic and optoelectronic properties. However, their strained topology prevents the π-extension of CPPs to convert them either into armchair nanobelts or planarized CPP macrocycles. Here we successfully tackle this long-standing challenge and present the bottom-up synthesis and characterization of atomically precise in-plane π-extended [12]CPP on Au(111) by low-temperature scanning probe microscopy and spectroscopy combined with density functional theory. The planar π-extended CPP is a nanographene with an all-armchair edge topology. The exclusive para-conjugation at the periphery yields delocalized electronic states and the planarization maximizes the overlap of p orbitals, which both reduce the bandgap compared to conventional CPPs. Calculations predict ring currents and global aromaticity in the doubly charged system. The intriguing planar ring topology and unique electronic properties make planar π-extended CPPs promising quantum materials.
DOI: 10.15468/dl.zk33f7
title: Occurrence Download

description: A dataset containing 47426 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Mexico",
 "TaxonKey is Vireo gilvus (Vieillot, 1808)"
 ]
}

 The dataset includes 47426 records from 79 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0005025-250117142028555/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.9rj629
title: Occurrence Download

description: A dataset containing 1628 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is one of (South Africa, Lesotho, Eswatini)",
 "TaxonKey is one of (Euryptila subcinnamomea (A.Smith, 1847))",
 "BasisOfRecord is one of (Human Observation, Observation)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1950",
 "OccurrenceStatus is Present",
 "DistanceFromCentroidInMeters is greater than or equal to 2000"
 ]
}

 The dataset includes 1628 records from 8 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0005030-250117142028555/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5281/zenodo.14680831
title: Assessing the vulnerability and conservation potential of old growth forests in British Columbia, Canada.
DOI: 10.5281/zenodo.14680830
title: Assessing the vulnerability and conservation potential of old growth forests in British Columbia, Canada.

description: Pochailo N., Viliani L., Stolar J., Stralberg D., Nielsen S., (2025). Assessing the vulnerability and conservation potential of old growth forest in British Columbia, Canada. In review
description: Climate change is predicted to have widespread effects on the distribution of many species and ecosystems, including old growth forests. Because of the slow development time of old growth forests, it is especially important for their management to map and understand areas of relative climatic stability, or “climate-change refugia”. British Columbia (BC), Canada, holds globally significant areas of old growth forests with varying levels of climate change threat. To better understand these threats, we used Maxent to model climate niches of BC’s ecosystem types, as represented by Biogeoclimatic Ecosystem Classification units. We then projected ecosystem changes for the 2050s climate period and overlaid them with current and potential future old growth forests (old forests projected to become old growth in absence of fire) to identify where these forests are likely to persist (“old growth refugia) and develop a Provincial Refugia Probability Index. Finally, we assessed to what extent BC’s current protected areas network represents current and future old growth forest. Our analysis identified 110,545 km² of current old growth in BC, which has the potential to increase via natural succession by up to an additional 69,410 km² by 2055, barring future wildfires or other disturbances. We also showed that up to 54% of the province and 63% of current old growth fell within the projected area of maximum total refugia for the 2050s climate period. Less than 12% of these forests were within refugia and already conserved, with <0.2% protected in areas with “high” probability of refugia. Thus, we demonstrate that almost all old growth in BC is susceptible to climate change, human development, or both, highlighting the continued vulnerability of these forests into the middle of the century. Overall, over 51% of BC’s old growth was identified as susceptible to human development and within the projected area of maximum total refugia. We suggest future planning to focus on conserving elements of these areas, as their projected climate stability potentially translates into efficient, long-term protections. We provide a framework for forest and conservation managers to assess the future effects of climate change on old growth forests in BC, or beyond.
DOI: 10.5281/zenodo.14708174
title: Assessing the vulnerability and conservation potential of old growth forests in British Columbia, Canada.

description: Pochailo N., Viliani L., Stolar J., Stralberg D., Nielsen S., (2025). Assessing the vulnerability and conservation potential of old growth forest in British Columbia, Canada. In review
description: Climate change is predicted to have widespread effects on the distribution of many species and ecosystems, including old growth forests. Because of the slow development time of old growth forests, it is especially important for their management to map and understand areas of relative climatic stability, or “climate-change refugia”. British Columbia (BC), Canada, holds globally significant areas of old growth forests with varying levels of climate change threat. To better understand these threats, we used Maxent to model climate niches of BC’s ecosystem types, as represented by Biogeoclimatic Ecosystem Classification units. We then projected ecosystem changes for the 2050s climate period and overlaid them with current and potential future old growth forests (old forests projected to become old growth in absence of fire) to identify where these forests are likely to persist (“old growth refugia) and develop a Provincial Refugia Probability Index. Finally, we assessed to what extent BC’s current protected areas network represents current and future old growth forest. Our analysis identified 110,545 km² of current old growth in BC, which has the potential to increase via natural succession by up to an additional 69,410 km² by 2055, barring future wildfires or other disturbances. We also showed that up to 54% of the province and 63% of current old growth fell within the projected area of maximum total refugia for the 2050s climate period. Less than 12% of these forests were within refugia and already conserved, with <0.2% protected in areas with “high” probability of refugia. Thus, we demonstrate that almost all old growth in BC is susceptible to climate change, human development, or both, highlighting the continued vulnerability of these forests into the middle of the century. Overall, over 51% of BC’s old growth was identified as susceptible to human development and within the projected area of maximum total refugia. We suggest future planning to focus on conserving elements of these areas, as their projected climate stability potentially translates into efficient, long-term protections. We provide a framework for forest and conservation managers to assess the future effects of climate change on old growth forests in BC, or beyond.
DOI: 10.15468/dl.aprgqx
title: Occurrence Download

description: A dataset containing 122206 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((-73.43519 10.57144,-72.82007 10.53617,-72.41694 10.50385,-72.24976 11.06927,-72.54926 11.06927,-73.17296 11.06927,-73.43519 10.57144))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present"
 ]
}

 The dataset includes 122206 records from 190 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0005007-250117142028555/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.xmazwf
title: Occurrence Download

description: A dataset containing 156680 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Oxalis corniculata L."
 ]
}

 The dataset includes 156680 records from 1565 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0005015-250117142028555/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.st9kxp
title: Occurrence Download

description: A dataset containing 193 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Kazakhstan",
 "DatasetKey is one of (Earthworm occurrences from Russian-language literature, iNaturalist Research-grade Observations, Worms (Luomus), World distribution of the aquatic Oligochaeta, Natural History Museum (London) Collection Specimens)",
 "OccurrenceStatus is Present",
 "TaxonKey is Lumbricidae"
 ]
}

 The dataset includes 193 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001790-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.6sfv3k
title: Occurrence Download

description: A dataset containing 4 species occurrences available in GBIF matching the query:
{"type":"and","predicates":[{"type":"equals","key":"TAXON_KEY","value":"2516147","matchCase":false},{"type":"equals","key":"OCCURRENCE_STATUS","value":"PRESENT","matchCase":false},{"type":"equals","key":"HAS_COORDINATE","value":"true","matchCase":false},{"type":"equals","key":"HAS_GEOSPATIAL_ISSUE","value":"false","matchCase":false},{"type":"lessThan","key":"COORDINATE_UNCERTAINTY_IN_METERS","value":"10000","matchCase":false},{"type":"in","key":"YEAR","values":["2008","2009","2010","2011","2012","2013","2014","2015","2016","2017","2018","2019","2020","2021","2022","2023","2024"],"matchCase":false},{"type":"in","key":"BASIS_OF_RECORD","values":["LIVING_SPECIMEN","HUMAN OBSERVATION","OBSERVATION","OCCURRENCE","MACHINE_OBSERVATION"],"matchCase":false}]}

 The dataset includes 4 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001791-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.8ushd5
title: Occurrence Download

description: A dataset containing 231 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Phyllanthus matsumurae Hayata ex Y.Yabe, Phyllanthus matsumurae Hayata, Phyllanthus matsumurae Hayata, Phyllanthus matsumurae Hayata, Phyllanthus matsumurae Hayata ex Fabe, Phyllanthus matsumurae Hayata ex Fabe, Phyllanthus matsumurae Hayata ex Y.Yabe, Phyllanthus matsumurae Hayata ex Y.Yabe, 1904, Phyllanthus matsumurae Hayata ex Fabe, Phyllanthus matsumurae Hayata ex Fabe, Phyllanthus matsumurae Hayata ex Fabe, Phyllanthus matsumurae Hayata ex Y.Yabe, 1904)",
 "BasisOfRecord is one of (Specimen, Human Observation, Observation, Living Specimen, Machine Observation, Literature Occurrence)",
 "Geometry POLYGON((-180 -90,180 -90,180 90,-180 90,-180 -90))",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 231 records from 13 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001793-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.zvv98v
title: Occurrence Download

description: A dataset containing 46989 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON ((-72.01993 -13.55495, -71.85344 -13.55495, -71.85344 -13.49772, -72.01993 -13.49772, -72.01993 -13.55495))",
 "Year is greater than or equal to 2013",
 "HasGeospatialIssue is false",
 "TaxonKey is Aves",
 "HasCoordinate is true",
 "OccurrenceStatus is Present",
 {
 "not" : {
 "BasisOfRecord" : [
 "is one of (Fossil, Living Specimen, Specimen)"
 ]
 }
 }
 ]
}

 The dataset includes 46989 records from 8 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001792-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.e2qwdd
title: Occurrence Download

description: A dataset containing 9 species occurrences available in GBIF matching the query:
{"type":"and","predicates":[{"type":"equals","key":"TAXON_KEY","value":"2566061","matchCase":false},{"type":"equals","key":"OCCURRENCE_STATUS","value":"PRESENT","matchCase":false},{"type":"equals","key":"HAS_COORDINATE","value":"true","matchCase":false},{"type":"equals","key":"HAS_GEOSPATIAL_ISSUE","value":"false","matchCase":false},{"type":"lessThan","key":"COORDINATE_UNCERTAINTY_IN_METERS","value":"10000","matchCase":false},{"type":"in","key":"YEAR","values":["2008","2009","2010","2011","2012","2013","2014","2015","2016","2017","2018","2019","2020","2021","2022","2023","2024"],"matchCase":false},{"type":"in","key":"BASIS_OF_RECORD","values":["LIVING_SPECIMEN","HUMAN OBSERVATION","OBSERVATION","OCCURRENCE","MACHINE_OBSERVATION"],"matchCase":false}]}

 The dataset includes 9 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001794-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.j3w94a
title: Occurrence Download

description: A dataset containing 1336 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Mexico",
 "GadmGid is MEX.6_1",
 "OccurrenceStatus is Present",
 "TaxonKey is Alcedinidae"
 ]
}

 The dataset includes 1336 records from 13 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001795-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.bpad5d
title: Occurrence Download

description: A dataset containing 19 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON ((-71.48925 10.30072, -71.39488 10.30072, -71.39488 10.43094, -71.48925 10.43094, -71.48925 10.30072))",
 "Year is greater than or equal to 2013",
 "HasGeospatialIssue is false",
 "TaxonKey is Aves",
 "HasCoordinate is true",
 "OccurrenceStatus is Present",
 {
 "not" : {
 "BasisOfRecord" : [
 "is one of (Fossil, Living Specimen, Specimen)"
 ]
 }
 }
 ]
}

 The dataset includes 19 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001796-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.wvg4f2
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{"type":"and","predicates":[{"type":"equals","key":"TAXON_KEY","value":"2582112","matchCase":false},{"type":"equals","key":"OCCURRENCE_STATUS","value":"PRESENT","matchCase":false},{"type":"equals","key":"HAS_COORDINATE","value":"true","matchCase":false},{"type":"equals","key":"HAS_GEOSPATIAL_ISSUE","value":"false","matchCase":false},{"type":"lessThan","key":"COORDINATE_UNCERTAINTY_IN_METERS","value":"10000","matchCase":false},{"type":"in","key":"YEAR","values":["2008","2009","2010","2011","2012","2013","2014","2015","2016","2017","2018","2019","2020","2021","2022","2023","2024"],"matchCase":false},{"type":"in","key":"BASIS_OF_RECORD","values":["LIVING_SPECIMEN","HUMAN OBSERVATION","OBSERVATION","OCCURRENCE","MACHINE_OBSERVATION"],"matchCase":false}]}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001797-241024112534372/datasets/export for details.
DOI: 10.15468/dl.s886zz
title: Occurrence Download

description: A dataset containing 1323 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is North America",
 "Country is Mexico",
 "StateProvince is Durango",
 "TaxonKey is Orchidaceae"
 ]
}

 The dataset includes 1323 records from 50 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001800-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.w7sjdx
title: Occurrence Download

description: A dataset containing 231 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Phyllanthus matsumurae Hayata ex Y.Yabe, Phyllanthus matsumurae Hayata, Phyllanthus matsumurae Hayata, Phyllanthus matsumurae Hayata, Phyllanthus matsumurae Hayata ex Fabe, Phyllanthus matsumurae Hayata ex Fabe, Phyllanthus matsumurae Hayata ex Y.Yabe, Phyllanthus matsumurae Hayata ex Y.Yabe, 1904, Phyllanthus matsumurae Hayata ex Fabe, Phyllanthus matsumurae Hayata ex Fabe, Phyllanthus matsumurae Hayata ex Fabe, Phyllanthus matsumurae Hayata ex Y.Yabe, 1904)",
 "BasisOfRecord is one of (Specimen, Human Observation, Observation, Living Specimen, Machine Observation, Literature Occurrence)",
 "Geometry POLYGON((-180 -90,180 -90,180 90,-180 90,-180 -90))",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 231 records from 13 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001801-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ujgkcq
title: Occurrence Download

description: A dataset containing 22119 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON ((-71.22315 8.552767, -71.12832 8.552767, -71.12832 8.625871, -71.22315 8.625871, -71.22315 8.552767))",
 "Year is greater than or equal to 2013",
 "HasGeospatialIssue is false",
 "TaxonKey is Aves",
 "HasCoordinate is true",
 "OccurrenceStatus is Present",
 {
 "not" : {
 "BasisOfRecord" : [
 "is one of (Fossil, Living Specimen, Specimen)"
 ]
 }
 }
 ]
}

 The dataset includes 22119 records from 4 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001802-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.