World Rewilding Day on March 20 celebrates human efforts to rewild and restore degraded areas. Rewilding can focus on a single species, a city park, or even an entire island, and Mongabay has reported on such efforts from around the word.
Rewilding in France’s Dauphiné Alps
France’s largest rewilding project is underway in the Dauphiné Alps, in the south of the country. In the 18th century, much of the region was cleared for agriculture. But with the advent of the Industrial Revolution, many people abandoned farms and moved to cities. Left undisturbed, native trees and wildlife slowly began coming back.
“It allows us to build on what’s been done already,” Olivier Raynaud, director of Rewilding France and leader of the Dauphiné Alps project, told Mongabay. “We’re not starting from scratch.”
Four species of vultures have already been reintroduced, following successful breeding in captivity. They’re crucial for ridding the area of disease-spreading carrion and have become a tourist attraction.
Next, the project plans to bring back large herbivores, including Polish konik ponies and Scottish Galloway cattle, which are expected to spread seeds that will eventually grow into a forest.
Project leaders also hope to bring back the locally endangered Eurasian lynx and eventually wolves — though the wolf plan has so far faced pushback from locals who see the predators as a threat to livestock.
Rewilding the world’s largest volcanic lake
Lake Toba, on the Indonesian island of Sumatra, is the largest volcanic lake in the world and historically home to diverse wildlife including gibbons and endemic fish species. However, over the last two decades, nearly a quarter of its old-growth forest has been cleared, causing ash, trash and pesticides to run off into the lake.
Retired civil servant Wilmar Eliaser Simandjorang has dedicated himself to rewilding the lake and advocating for stricter environmental laws to protect the area. He has worked with local communities to build grassroots networks aimed at reforesting the region.
“I motivated residents to understand that planting trees was like planting their own future,” Wilmar told Mongabay.
Rewilding, one species at a time
Many projects focus on specific species for rewilding, often animals that are threatened or key ecosystem engineers.
In the Democratic Republic of Congo, conservationists released four critically endangered female gorillas, rescued from the illegal wildlife trade, into Virunga National Park. The Gorilla Rehabilitation and Conservation Education Center (GRACE), which prepared the great apes for their release, reports that they’ve successfully integrated into the wild population.
In Brazil’s Atlantic Forest, brown howler monkeys (Alouatta guariba) were dying en masse following an outbreak of yellow fever. So scientists tweaked a yellow fever vaccine meant for humans and successfully treated the monkeys before reintroducing them to Tijuca National Park in Rio de Janeiro. Brown howlers are excellent seed dispersers and are expected to help restore the degraded park.
Banner image: The four gorillas on the day they were reintroduced to Virunga National Park. Image courtesy of GRACE.