Inside a small bright lab, nestled behind sprawling Banyan trees in Miami's Fairchild Tropical Botanic Garden, scientists and volunteers tend to tens of thousands of just-germinated orchids tucked in glass bottles.
Fifty thousand more with long verdant leaves wait in a nearby nursery. In the coming weeks, crews in bucket trucks, usually used to fix power lines, will lift the fragile plants onto trees that line south Florida's roads, hoping they will take root and re-establish the blanket of millions of brightly coloured flowers that once covered the state.
“We want to bring back not just the orchids, but the insects that pollinate them,” said Carl Lewis, who leads the Million Orchid Project as director of the botanic garden.
Decades of breakneck urban development and population growth all but destroyed the region's native orchid species. The vividly colored flowers were pulled from their perches by enthusiasts and dealers, who shipped them north to be sold in home stores and at spring farmer's markets.
The effort to reintroduce millions of orchids in Miami was inspired by a similar undertaking in Singapore that began in the mid-1990s, Lewis said.
Of the island-country's 229 native orchids, 170 are extinct and 54 are “critically endangered,” Yam Tim Wing, principal researcher at the Singapore Botanic Gardens, said in an email.
In the last two decades, researchers have managed to re-introduce 18 species of orchids once extinct in the wild across the densely urbanized island. The flowers include the Tiger Orchid, the largest orchid species in the world.
“More than 10 years after they were planted through the program, several Tiger Orchid plants flowered for the first time by the roadside in March 2013,” Yam wrote.
A handful of the Florida species that Fairchild scientists are hoping to repopulate grow in limited numbers at the garden. The Cigar Orchid's tendrils hang from a wide palm tree, sprouting tiny yellow and brown flowers. A Pine Pink Orchid grows up from in between a broad-leaf shrub, blossoming slender lavender flowers.
Scientists know little about what makes the plants thrive. The most stunning species blossom as little as once every few years. Inside the lab, orchids germinate for different lengths of time, sometimes even in complete darkness.
The seeds, as small as a speck of dust, are planted in different concentrations of nutrient-filled gels to see which stimulates the fastest growth, helping prepare for the myriad situations the plants face in the wild.
“We don't know how the orchids are going to respond to urban microclimates,” Lewis said. “What we need to do is get these orchids into as many different situations as possible.”
How the orchids fare could provide insight into how native species can be reintroduced into altered environments.
“There'll be lessons learned we'll be able to take forward to the next species,” said Kathryn Kennedy, the centre’s executive director.ReutersReuters