README file for Research Data James Cook University repository, created on 29 June 2022

-------------------------------------------------
Citation
-------------------------------------------------

Do currents shape global patterns of hybrid richness in coral reef fishes? - Global Ecology and Biogeography
Authors: Ng, Isabelle; Bellwood, David R; Siqueira, Alexandre C
Corresponding author: Ng, Isabelle (isabelle.ng@my.jcu.edu.au)


-------------------------------------------------
Description of files
-------------------------------------------------
(1) "Hybrid_data_Ng_etal.csv" 

This file contains the dataset of coral reef fish hybrids obtained through a literature review, as described in the manuscript.

-------------------------------------------------
(2) "Model_data_Ng_etal.csv" 

This file contains the modelling dataset with all response and explanatory variables.
	
	Descriptions of each variable:
		- Ecoregion: Ecoregion name labels.
		- Longitude: Longitude of ecoregion centroid.
		- Latitude: Latitude of ecoregion centroid.
		- Area_km2: The area of each ecoregion in square kilometre units.
		- Hybrids_n: The number of unique interpsecific hybrids.
		- BarrierDist: The distance in kilometres from the ecoregion to the nearest biogeographic barrier.
		- Barrier: Labels of biogeographic barriers corresponding to those described in Bellwood and Wainwright (2002) and Hodge and Bellwood (2016).
		- Isolation: Geographic isolation calculated as the distance to the nearest ecoregion divided by the number of ecoregions within the radius (i.e., median distance between all ecoregions in our study).
		- RichMean: Average species richness calculated from “cellValues_fixed0.5.csv” (Rabosky et  al. 2019). 
			    Values represent the sum of species richness from all the grid cells within the ecoregion ÷ the number of grid cells within the ecoregion.
		- EndMean: Average species richness calculated from “cellValues_fixed0.5_Endemics.csv” (Rabosky et  al. 2019). 
			   Values represent the sum of endemic richness from all the grid cells within the ecoregion ÷ the number of grid cells within the ecoregion.
		- PropEndMean: Endemism measured by a proportion of endemics (mean) to species richness (mean) (i.e., EndMean ÷ RichMean).
		- RichTot: Total species richness calculated from "species_by_Ecoregion_fixed0.5.csv" (Rabosky et al. 2019).
		- EndTot: Total endemic richness calculated from "species_by_Ecoregion_fixed0.5.csv" (Rabosky et al. 2019). Species were flagged as endemic if only found in one ecoregion.
			  Values of 0 were replaced with 0.1 to enable log functioning.
		- PropEndTot: Endemism measured by the proportion of endemics (total) to species richness (total) (i.e., EndTot ÷ RichTot).
		- MeanCurrent_ms: The average mean current velocity measured in metres per second.
		- PhyloDist: Average phylogenetic distance measured by branch lengths between each hybrid.
		

References
	1. Bellwood, D. R., & Wainwright, P. C. (2002). The history and biogeography of fishes on coral reefs. Coral reef fishes: dynamics and diversity in a complex ecosystem, 5, 32. 
	2. Hodge, J. R., & Bellwood, D. R. (2016). The geography of speciation in coral reef fishes: the relative importance of biogeographical barriers in separating sister-species. Journal of Biogeography, 43(7), 1324-1335. https://doi.org/10.1111/jbi.12729 
	3. Rabosky, D., Chang, J., Title, P. O., Cowman, P. F., Sallan, L., Friedman, M., Kaschner, K., Garilao, C., Near, T. J., Coll, M., & Alfaro, M. E. (2019). Data from: an inverse latitudinal gradient in speciation rate for marine fishes. Dryad10, 5061. https://doi.org/10.5061/dryad.fc71cp4 


-------------------------------------------------