Mapping of spatial, environmental, landscape and biotic
variables
Records were compiled for 238 10 × 10° latitude × longitude gridcells
covering the six world ecozones (Palaearctic, Nearctic, Neotropics,
Afrotropics, Orient, and Australasia: see Appendix A7 of Murphy et al.
(2019) for full information on gridcell locations and ecozone
boundaries) that primarily contain the freshwater and brackish inland
waterbodies in which aquatic macrophytes occur, using ESRI® ArcMap™ v.
9.3.1. and following procedures described in detail by Murphy et al.
(2019, 2020).