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).