Hong Kong’s ‘hero trees’ lose their glory as climate warms

Hong Kong’s ‘hero trees’ lose their glory as climate warms

Hong Kong’s beloved kapok trees, known locally as “hero trees” for their majestic appearance, are no longer blooming as they once did, raising concerns among conservationists who view this as a sign that nature is becoming increasingly out of sync with the changing climate. Every spring, these trees attract large numbers of photographers with their vibrant red flowers that bloom on otherwise bare branches. However, in recent years, the stark contrast between the flowers and foliage has been fading as leaves that should have been shed during winter remain on the trees, worrying researchers.

“The kapok trees we see now very often have both flowers and leaves at the same time,” said Lam Chiu-ying, former director of the Hong Kong Observatory. “In some places, half the tree is covered in green leaves and the other half in red flowers.” The kapok, also known as the red silk-cotton tree, is native to tropical and subtropical Asia, including southern China. The shift in their springtime appearance has “become increasingly common” over the past decade due to warming winters caused by climate change, Lam told AFP.

Hong Kong has recently recorded its warmest winter on record, with the mean temperature from December to February hitting 19.3 °C, two degrees higher than normal, according to the observatory. Angie Ng, an ecologist and conservation manager at local NGO The Conservancy Association, noted that the trees seemed to be blooming about two weeks earlier than usual this year, likely due to climate factors like temperature and moisture.

The trees have to divert resources to maintain both old leaves and new flowers, which may result in fewer blooms, Ng explained. This disruption could have knock-on effects on wildlife, as the flowers provide nectar for birds and pollen for bees. “The ecological process is being disturbed,” Ng warned. “The trees are not getting the nutrients they need for reproduction, and this could lead to a decline in their population over time.”

Conservationists are urging policymakers to take action to mitigate the impacts of climate change on Hong Kong’s fragile ecosystems. “We need to prioritize protecting our natural heritage and ensuring that future generations can still enjoy the beauty of these iconic trees,” Ng emphasized. Meanwhile, Lam Chiu-ying called for more research to better understand the long-term effects of climate change on Hong Kong’s flora and fauna.

As the climate continues to warm, the future of Hong Kong’s kapok trees—and the many other species that depend on them—hangs in the balance. The once-majestic “hero trees” now serve as a stark reminder of the urgent need for global efforts to combat climate change and safeguard our planet’s natural wonders.