DOI: 10.5281/zenodo.14604550
title: Baseline and Future (Shared Socio-economic Pathways 1-2.6 and 3-7.0 for the 2050s) Climate Suitability Maps for 351 Useful Tree Species for the Liptako Gourma Region

description: Climate suitability scores were calculated for 351 useful tree species. These species were selected as they were either included in Michel Arbonnier’s Trees, Shrubs and Lianas of West African dry zones (TSLWAD), were tree species with documented traditional plant uses in Burkina Faso (Zizka et al. 2015), or were in the list of native useful tree species for Burkina Faso obtained from the GlobalUsefulNativeTrees database (GlobUNT; Kindt et al. 2023a). Species from TSLWAD were filtered by selecting species where information on their habitat referenced Sahelo-Saharan, Sahelian, Sahelo-Sudanian, Sudanian or Sudano-Guinean zones, whereas species from (Zizka et al. 2015) were filtered by being included in GlobUNT and having minimum one documented use.

After compiling the list of species, we checked afterwards for the availability of globally observed environmental ranges for these species from the TreeGOER database (Kindt 2023). Species with fewer than 10 observations in TreeGOER were excluded. Species without any suitable raster cells in the baseline climate were also excluded.

The climate scoring system is the same that is used in the GlobalUsefulNativeTrees database:



Score = 3 means that in 'environmental space' the planting site occurs within the 25% - 75% species's range (as documented in the TreeGOER) for all variables

Score = 2 corresponds to the 5% - 95% species's range for all variables

Score = 1 corresponds to the 0% - 100% species's range for all variables

Score = 0.5 means that the planting site occurs outside the 0% - 100% species's range for some of the variables, but for heat-related bioclimatic variables (used to produce the maps shown here: BIO01, monthCountByTemp10, growingDegDays5, BIO05 and BIO06) to be below the minimum (‘too cold but not too hot’) and for water-related bioclimatic variables (used here: BIO12, climaticMoistureIndex, BIO16, BIO17 and MCWD) to be above the maximum (‘too wet but not too dry’)

Score = 0 means that the planting site occurs outside the 0% - 100% species's range for some of the variables


 

Climate scores were obtained for future climates (2050s: 2041-2060) from the median values from 24 Global Climate Models (GCMs) for Shared Socio-Economic Pathway (SSP) 1-2.6 and from 22 GCMs for SSP 3-7.0. Future and baseline bioclimatic layers were processed from raster layers obtained from WorldClim 2.1 at resolutions of 2.5 arc-minutes. Similar methods were used to obtain median values for the ClimateForecasts and CitiesGOER databases.

Calculations of climate scores were made with similar scripting pipelines in the R statistical environment as documented here: https://rpubs.com/Roeland-KINDT/1168650. These scripts use similar calculation methods as those used for the global case studies of the TreeGOER manuscript (Kindt 2023), and used internally in the GlobalUsefulNativeTrees online database. Interested readers should especially refer to the manuscript for further details on methods used and their justification.

Alternative future climate maps were obtained by calculating climate scores for each GCM and SSP separately, then counting the number of GCMs that projected that the species would be suitable under the future climatic conditions. A species was estimated to be suitable for a particular combination of GCM and SSP if its score was 1 or above. The maps distinguished areas where 33% or fewer of the GCMs predicted that the species would be suitable, and areas where 66% or more of the GCMs predicted that the species would be suitable. Those thresholds correspond to the Mastrandea et al. (2011) likelihood scale, which was adopted earlier in another climate change atlas (Kindt et al. 2023b; https://atlas.worldagroforestry.org/). A separate mapping category shows where 66% or more GCMs had a climate score of 2 or 3.

 




Percentage of GCMs projecting that the species is suitable
Count of GCMs for SSP 1-2.6
Count of GCMs for SSP 3-7.0


0 %
0
0


<= 33 % ('Unlikely')
1 - 8
1 - 7


33 % < percentage < 66 %
9 - 15
8 - 14


>= 66 % ('Likely')
16 - 24
15 - 22


>= 66 % with a Climate Score > 1 ('Likely')
16 - 24
15 - 22




 

The maps include a red polygon showing the outline of the Liptako-Gourma region. We greatly appreciate Fatoumata Ndiaye, the cartography officer at the Danish Refugee Council Regional Office, for sharing the shapefile with us. The first map for the baseline climate includes presence observations in the country obtained from the RAINBIO database (Dauby et al. 2016) and from the Global Biodiversity Information Facility (filtered from the occurrences that informed the TreeGOER database; GBIF.org 2021 GBIF Occurrence Download https://doi.org/10.15468/dl.77gcvq).

The MS Excel file contains columns that include information from World Flora Online, including hyperlinks to this online flora.

 

References



Arbonnier Michel. 2004. Trees, shrubs and lianas of West African dry zones. Montpellier : CIRAD-MNHN, 579 p. ISBN 2-85653-571-2 ; 2-87614-579-0

Zizka, A., Thiombiano, A., Dressler, S. et al. Traditional plant use in Burkina Faso (West Africa): a national-scale analysis with focus on traditional medicine. J Ethnobiology Ethnomedicine 11, 9 (2015). https://doi.org/10.1186/1746-4269-11-9

Kindt, R. (2023). TreeGOER: A database with globally observed environmental ranges for 48,129 tree species. Global Change Biology, 00, 1–16. https://onlinelibrary.wiley.com/doi/10.1111/gcb.16914.

Kindt, R. (2024). TreeGOER: Tree Globally Observed Environmental Ranges (2024.07) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.13132613

Kindt, R., Graudal, L., Lillesø, JP.B. et al. (2023a). GlobalUsefulNativeTrees, a database documenting 14,014 tree species, supports synergies between biodiversity recovery and local livelihoods in landscape restoration. Sci Rep 13, 12640. https://doi.org/10.1038/s41598-023-39552-1

Kindt R, Abiyu A, Borchardt P, Dawson IK, Demissew S, Graudal L, Jamnadass R, Lillesø J-PB, Moestrup S, Pedercini F, Wieringa JJ, Wubalem T. 2023. The Climate change atlas for Africa of tree species prioritized for forest landscape restoration in Ethiopia: A description of methods used to develop the atlas. Working Paper No. 17. Bogor, Indonesia; and Nairobi, Kenya: Center for International Forestry Research and World Agroforestry (CIFOR-ICRAF). https://doi.org/10.17528/cifor-icraf/008977

Kindt, R. (2023). CitiesGOER: Globally Observed Environmental Data for 52,602 Cities with a Population ≥ 5000 (2023.10) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.10004594

Kindt, R. (2024). ClimateForecasts: Globally Observed Environmental Data for 15,504 Weather Station Locations (2024.07) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.12679832

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Mastrandrea, M.D., Mach, K.J., Plattner, GK. et al. The IPCC AR5 guidance note on consistent treatment of uncertainties: a common approach across the working groups. Climatic Change 108, 675 (2011). https://doi.org/10.1007/s10584-011-0178-6

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Funding

The development of this climate change atlas for the Liptako-Gourma region was supported by Global Affairs Canada through the Ecosystem Resilience and Women's Leadership in the Sahel (RÉELS) project in Burkina Faso, Mali, and Niger and by the Green Climate Fund through the Readiness proposal on Climate Appropriate Portfolios of Tree Diversity for Burkina Faso project.