Human-induced reduction in mammalian movements impacts seed dispersal in the tropics.
Date of Archiving2021
The tropics: Central America, South America, Africa, Asia-Pacific~~~~~~
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Key wordsanimal-mediated seed dispersal; ecosystem functions; frugivore; individual-based model; mammal
This repository contains the code and data to run an IBM simulating mammalian seed dispersal in the tropics from Tucker, M.A,., Busana, M., Huijbregts, M.A.J., & Ford, A.T. (2021). Human-induced reduction in mammalian movements impacts seed dispersal in the tropics. Ecography. 10.1111/ecog.05210 You will need both .R files to run the simulations ("Tucker_SDD_Sims_Run.R","Tucker_SDD_Sims_Source.R"). Example data is provided to illustrate which information is required to run the simulations ("ExampleSimulationData.csv"). The HFI (Human Footprint Index) and NDVI (Normalised Difference Vegetation Index) data can be values set by the researcher, or values extracted from a raster. The step length (distance travelled per hour in metres) is calculated using the equations from the above manuscript. The species-level data that was used to run the simulations is also included ("SpeciesData.zip"). The species-level data spans 37 terrestrial mammals (>10kg) across the tropics. The HFI data was extracted from 1 km global human footprint index (HFI for 2009; Venter et al. 2016). The HFI and NDVI data were extracted from each grid cell across the entire range of each species based on the IUCN range data (IUCN, 2019). The NDVI data was extracted from Copernicus 1 km PROBA-V global normalized difference vegetation index (NDVI) data (1999–2017 average; Jacobs and Wolfs 2019). References: IUCN (2019). The IUCN Red List of Threatened Species. Version 2019-2. https://www.iucnredlist.org. Downloaded on February 2019. Jacobs, T. and Wolfs, D. 2019. Normalized difference vegetation index: long term statistics 1 km: GLOBE 1999–2017 (V2.2.1). – <https://land.copernicus.eu/global/products/ndvi>, accessed 17 April 2019. Venter, O. et al. 2016. Sixteen years of change in the global terrestrial human footprint and implications for biodiversity conservation. – Nat. Comm. 7: 12558.