Fig. 4
From: Modeling spatial patterns of longleaf pine needle dispersal using long-term data
Predictions of leaf litter dispersal from anisotropic model as a function of distance from a source tree (dbh = 30 cm) in the upwind and downwind directions using a mean value of α parameter to represent an average year; b frequency distribution of daily wind direction for all months from 2011–2021. The red arrow indicates the parameter estimate for \({\theta }_{d}\)= 5.66 radians (324.3°)