Exposure of threatened plant species to changing drought regimes: a global analysis
Data files
May 05, 2026 version files 65.26 MB
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drought_metrics_compile_20240510.csv
2.33 MB
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drought_metrics_compile_points_20240607.csv
9.99 MB
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fulldroughtwithxylemdata.csv
37.39 MB
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fullIUCNandgrowthform.csv
15.54 MB
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README.md
10.45 KB
Abstract
This dataset is from an article to determine the exposure of threatened plant species to future increases in drought duration and frequency. We quantified the exposure of Red Listed plant species to future drought regimes by intersecting species' geographic ranges with global projections of drought duration and frequency. In threatened trees and shrubs species, data on hydraulic measures of sensitivity to drought are scarce, with key data available for only six species assessed for expsoure which we also intersected in this study. All data are available in this dryad repository.
Dataset DOI: 10.5061/dryad.0p2ngf2cb
Description of the data and file structure
Both raw data and cleaned data used for the manuscript 'Exposure of threatened plant species to changing drought regimes: a global analysis'.
Code used to clean data and analyse patterns available at: https://github.com/SEveringham/Threatened-Species-Drought-Exposure
Files and variables
File: drought_metrics_compile_20240510.csv
Description: Cleaned data created from overlaying species' extent of occurrence over future drought projections. This data is then used in the main exposure analyses in the study.
Variables
- species_name: taxonomic name of species
- category: IUCN Red List threat category
- eoo_km2: Species' extent of occurrence as calculated on the IUCN Red List (km2)
- duration_245_proportion_non_robust: Proportion of species' range occurring in a non-robust drought projected area for drought duration projected under SSP2-4.5
- duration_245_proportion_positive_value: Proportion of species' range occurring in a positive drought projected area (increase in drought duration) for drought duration projected under SSP2-4.5
- duration_245_proportion_negative_value: Proportion of species' range occurring in a negative drought projected area (decrease in drought duration) for drought duration projected under SSP2-4.5
- duration_245_min: minimum value of a species' drought duration change for drought duration projected under SSP2-4.5 (months)
- duration_245_max: maximum value of a species' drought duration change for drought duration projected under SSP2-4.5 (months)
- duration_245_mean: mean value of a species' drought duration change for drought duration projected under SSP2-4.5 (months)
- duration_245_stdev: standard deviation of a species' drought duration change for drought duration projected under SSP2-4.5 (months)
- duration_585_proportion_non_robust: Proportion of species' range occurring in a non-robust drought projected area for drought duration projected under SSP5-8.5
- duration_585_proportion_positive_value: Proportion of species' range occurring in a positive drought projected area (increase in drought duration) for drought duration projected under SSP5-8.5
- duration_585_proportion_negative_value: Proportion of species' range occurring in a negative drought projected area (decrease in drought duration) for drought duration projected under SSP5-8.5
- duration_585_min: minimum value of a species' drought duration change for drought duration projected under SSP5-8.5 (months)
- duration_585_max: maximum value of a species' drought duration change for drought duration projected under SSP5-8.5 (months)
- duration_585_mean: mean value of a species' drought duration change for drought duration projected under SSP5-8.5 (months)
- duration_585_stdev: standard deviation of a species' drought duration change for drought duration projected under SSP5-8.5 (months)
- frequency_245_proportion_non_robust: Proportion of species' range occurring in a non-robust drought projected area for drought frequency projected under SSP2-4.5
- frequency_245_proportion_positive_value: Proportion of species' range occurring in a positive drought projected area (increase in drought frequency) for drought duration projected under SSP2-4.5
- frequency_245_proportion_negative_value: Proportion of species' range occurring in a negative drought projected area (decrease in drought frequency) for drought duration projected under SSP2-4.5
- frequency_245_min: minimum value of a species' drought frequency change for drought frequency projected under SSP2-4.5 (events per 10 years)
- frequency_245_max: maximum value of a species' drought frequency change for drought frequency projected under SSP2-4.5 (events per 10 years)
- frequency_245_mean: mean value of a species' drought frequency change for drought frequency projected under SSP2-4.5 (events per 10 years)
- frequency_245_stdev: standard deviation of a species' drought frequency change for drought frequency projected under SSP2-4.5 (events per 10 years)
- frequency_585_proportion_non_robust: Proportion of species' range occurring in a non-robust drought projected area for drought frequency projected under SSP5-8.5
- frequency_585_proportion_positive_value: proportion of species' range occurring in a positive drought projected area (increase in drought frequency) for drought duration projected under SSP5-8.5
- frequency_585_proportion_negative_value: proportion of species' range occurring in a negative drought projected area (decrease in drought frequency) for drought duration projected under SSP5-8.5
- frequency_585_min: minimum value of a species' drought frequency change for drought frequency projected under SSP5-8.5 (events per 10 years)
- frequency_585_max: maximum value of a species' drought frequency change for drought frequency projected under SSP5-8.5 (events per 10 years)
- frequency_585_mean: mean value of a species' drought frequency change for drought frequency projected under SSP5-8.5 (events per 10 years)
- frequency_585_stdev: standard deviation of a species' drought frequency change for drought frequency projected under SSP5-8.5 (events per 10 years)
File: drought_metrics_compile_points_20240607.csv
Description: Cleaned data created from overlaying species' area of occupancy over future drought projections. This data is then used in the supplementary exposure analysis in the study to confirm that using point based data (AOO) instead of extent based data (EOO) provides analagous results. All variables are the same as given in the metadata for 'drought_metrics_compile_20240510.csv' (see above for descriptions and units) except 'num_points' which denotes the number of location points in total that the species occupies
File: Xylem_Functional_Traits.csv
Description: Data extracted from https://xylemfunctionaltraits.org/ - all metadata/variable descriptions are available on the website.
File: fullIUCNandgrowthform.csv
Description: Data with the full IUCN Red List of Assessed species (both threatened and not threatened) along with their growth form
Variables
- RowNumber: Just a number created when data was cleaned (irrelevant to analyses)
- scientificName: taxonomic name of species
- redlistCategory: species' official IUCN Red List category
- systems: the key ecosystem where a species is located (marine, terrestrial, freshwater or any combination of two or three of these)
- GrowthForm: the growth form of that species (based off TRY data)
- ReferenceforGrowthForm: reference dataset where the growth form was collected from
- Aquatic: determination if the species is aquatic or not (yes/no) and if aquatic - these species are removed from all further analyses
File: fulldroughtwithxylemdata.csv
Description: data cleaned and merged from other datasets listed above used in main exposure and senstivity analyses for the study. Each row is a single species. Species occur globally.
Variables
- RowNumber: numeric variable added after cleaning (irrelevant to analyses)
- assessmentId: IUCN Red List assessment ID given to species
- internalTaxonId: IUCN Red List taxon ID given to species
- scientificName: taxonomic name of species
- redlistCategory: species' official IUCN Red List category
- redlistCriteria: official IUCN Red List criteria used to assess species Red List category - see https://portals.iucn.org/library/node/10315 for more information
- yearPublished: year that the species' latest IUCN Red List assessment was published
- assessmentDate: date that the species' latest IUCN Red List assessment was published
- criteriaVersion: Version of criteria used to assess species
- habitat: standard habitat type used to describe the major habitat/s in which taxa occur (for more information see: https://www.iucnredlist.org/resources/habitat-classification-scheme)
- systems: the key ecosystem where a species is located (marine, terrestrial, freshwater or any combination of two or three of these)
- realm: biogeographical location/s of species (Afrotropical/Antarctic/Australasian /Indomalayan/Nearctic/Neotropical/Oceanian/Palearctic
- possiblyExtinct: If species may be extinct (captivity and wild)
- possiblyExtinctInTheWild: If species may be extinct only in the wild (could still be in captivity)
- category: species' official IUCN Red List Category
- eoo_km2: species' total extent of occurrence size in km2
The remaining variables match dataset 'drought_metrics_compile_20240510.csv' see above for metadata information:
- duration_245_proportion_non_robust:
- duration_245_proportion_positive_value:
- duration_245_proportion_negative_value:
- duration_245_min:
- duration_245_max:
- duration_245_mean:
- duration_245_stdev:
- duration_585_proportion_non_robust:
- duration_585_proportion_positive_value:
- duration_585_proportion_negative_value:
- duration_585_min:
- duration_585_max:
- duration_585_mean:
- duration_585_stdev:
- frequency_245_proportion_non_robust:
- frequency_245_proportion_positive_value:
- frequency_245_proportion_negative_value:
- frequency_245_min:
- frequency_245_max:
- frequency_245_mean:
- frequency_245_stdev:
- frequency_585_proportion_non_robust:
- frequency_585_proportion_positive_value:
- frequency_585_proportion_negative_value:
- frequency_585_min:
- frequency_585_max:
- frequency_585_mean:
- frequency_585_stdev:
End matching variables
- EOODataAvailable: whether or not extent of occurrence data was available for that species (could be yes EOO available, no but AOO available or no nothing available)
- num_points: Number of location points in total that the species occupies
- DroughtThreatened: whether the species has drought listed as a threat in it's IUCN Red List assessment
- p50: species' p50 value (The xylem tension at which 50% of the maximum hydraulic conductivity is lost)
- psiminmidday: ψp min midday (MPa) Minimum midday xylem pressure potential
- psiminpredawn: ψp min predawn (MPa) Minimum predawn xylem pressure potential.