In ecology, disturbance caused by transient reduction in competition resulting from vegetation death or removal—through e.g. grazing, mowing or controlled burning—can help promote species diversity at local scales, but how it might shape distributions at larger scales is unknown.
In this study, researchers examined and compared the elevation range limits of tree species in undisturbed old-growth and secondary forests of Costa Rica. Using plot data and GBIF-mediated occurrences of 7,750 individual tree stems representing more than 490 species, the authors calculated elevation ranges of all species and analysed relationships with others parameters.
In their results, the typical elevation ranges of species tended to increase with elevation. Consistent with the authors' predictions, species in secondary growth forests had wider elevation ranges than species in old growth—a pattern also seen in larger stems compared to smaller stems. Despite some noise and uncertainty, these results together add evidence to a role of disturbance in expanding tree elevation ranges.