Rectangular and hexagonal grids used for observation, experiment and simulation in ecology

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Future accessibility impacts of transport policy scenarios: Equity and sensitivity to travel time thresholds for Bus Rapid Transit expansion in Rio de Janeiro (2019, positive): “A hexagon grid was used to reduce sampling bias from edge e ﬀ ects and because it is more suitable than rectangular grid to analyze spatial phenomena in which nearest neighborhood and connectivity are important (Birch et al., 2007).”
Why do birds migrate? A macroecological perspective (2015, background): “…grids have equal-sized, equal-area, spatial units (therefore being more suitable for representing variation in global diversity than rectangular grids) and each cell is equidistant from all of its neighbours (therefore being more appropriate for analyses of connectivity; Birch et al., 2007).”