nature & planetMongabay

Tens of thousands of orchids saved from road development in southern India

the gist

Many orchids are epiphytes: they grow on tree trunks and branches rather than in soil, so when a host tree is felled, the orchid usually dies with it. In Kerala, southern India, researchers collected more than 27,000 orchids from trees cut down or marked for removal for road building. They replanted them on trees in two public wetlands and on a beach, and about two years later nearly three-quarters were still alive. The rescue included 12 species found only in the region, and 11 of those have never been assessed for the IUCN Red List, so nobody knows how threatened they are. Kerala has 271 known orchid species, many in the Western Ghats.

how it works

Epiphytic orchids anchor their roots on bark and absorb moisture and nutrients from rain, air and debris, without harming the tree. Moved onto new host trees in suitable humid spots, they can reattach and keep growing.

so what

Roads and plantations quietly erase plants that never get counted, a kind of silent extinction. Rescue and replanting is cheap compared with losing species that were never assessed, and a roughly 75 percent survival rate suggests it can work as a stopgap while better protection is planned.

fun fact

Orchids are one of the two largest families of flowering plants, with well over 25,000 known species.

Mongabay · CC BY-ND 4.0

Illustrative photo · Rohit Naniwadekar, CC BY-SA 4.0, via Wikimedia Commons