Wasps move in on ant-plant partnership, disrupting a 10‑million‑year mutualism

An international team of scientists from Queen Mary University of London, the Royal Botanic Gardens, Kew, the Biology Centre of the Czech Academy of Sciences and other institutions has uncovered surprising new behavior in the tropical forests of Malaysian Borneo. In a study published in PeerJ, the researchers report that predatory wasps are increasingly taking over the hollow stems of the tropical plant Macaranga pearsonii—structures the tree has evolved specifically to house protective ant colonies.