This mistletoe cares more about host trees than climate
Oliveira EVS, Almeida TS, Oliveira HS, Gouveia SF
Plant Signaling
If you've ever spotted a clump of mistletoe thriving on one tree while the identical-looking tree next to it stays bare, this research explains why: the host tree itself, not the weather, is calling the shots.
Scientists studied a mistletoe called Psittacanthus robustus, which grows attached to host trees across South America and relies on birds to spread its sticky seeds. They expected climate to be the biggest factor shaping where this mistletoe pops up, but it turned out the host tree mattered most. The mistletoe's climate preferences line up closely with its host trees, not with the birds that carry its seeds around, suggesting the tree itself acts like a gatekeeper for where the parasite can survive.
Key Findings
Climatic niche similarity was highest between the mistletoe and its host trees, higher than between the mistletoe and its seed dispersers.
None of the species pairs (mistletoe-host, mistletoe-disperser) showed full niche equivalence, meaning their climate preferences are similar but not identical.
Machine-learning models identified host tree presence, not climate or disperser distribution, as the primary predictor of the mistletoe's occurrence.
chevron_right Technical Summary
A tropical mistletoe that grows on trees across South America depends far more on finding the right host tree than on climate or the birds that spread its seeds, according to new research.
Abstract Preview
Original paper
Disentangling biotic and abiotic drivers of a neotropical mistletoe.
Parasitic plants known as mistletoes are a key resource in ecosystems and form intricate networks of biotic interactions. Several mistletoe species exhibit specific associations with particular hos...
open_in_new Read full abstractAbstract copyright held by the original publisher.
Species Mentioned
Was this useful?
Want to tell us more? (optional)
Thanks for the note!
Something went wrong — please try again.
Too many submissions. Try again in an hour.
Street trees cut heat deaths by 39 percent in European cities
Trees in your local park or street aren't just pretty — they are literally keeping people alive during heatwaves, and planting even a modest number of the ri...
Psittacanthus robustus is a species of Neotropical mistletoe in the family Loranthaceae, which is found in Brazil, Colombia, Guyana, and Venezuela.