A recent study by Gabriela S. Olivares et al., conducted in the southern South American temperate rainforests, revealed how habitat structure influences the behavior of the arboreal marsupial Dromiciops bozinovici and the genetic diversity of two mistletoe species (Tristerix corymbosus and Desmaria mutabilis). Using camera traps and DNA sequencing, we found that D. bozinovici visits T. corymbosus more frequently in evergreen forests and D. mutabilis in deciduous forests, the latter being the only mistletoe species found above 1,250 m of elevation. Both mistletoes showed similar genetic diversity across forest types, but T. corymbosus was more diverse overall. Gene flow was stronger toward evergreen forests, particularly for D. mutabilis. This study highlights the critical role of plant-frugivore interactions in shaping genetic and spatial patterns, especially in high-mountain ecosystems where mistletoes provide key resources for wildlife. Gaby’s article underscores the importance of conserving diverse forest habitats to maintain ecological balance and genetic diversity in these unique ecosystems.
Read Gaby’s paper in full here: https://doi.org/10.1016/j.ppees.2025.125850