
Professor Louise ASHTON
Researchers // Professor Louise ASHTON, Associate Professor; Dr Adam SHARP, Postdoctoral Researcher; Professor Timothy BONEBRAKE, Director and Professor; Dr Xiaoyi ZENG, Postdoctoral Researcher; Yirong GUO, Undergraduate Researcher; Dr Michael BOYLE, Research Assistant Professor, at the School of Biological Sciences.
Collaborator // Griffith University
Collaborator // Griffith University
In the tropics, a rainforest is never truly silent. Even at night, the air usually trembles with tiny lives—wings brushing past leaves, beetles ticking across bark , caterpillars quietly grazing in the dark. Nevertheless in many places, that soft music is fading.A new study led by HKU ecologists has uncovered a hidden decline in the insects and small creatures that hold these forests together. These arthropods, delicate spiders, bright beetles, patient ants, may be small, but they are the rainforest’s heartbeat. They turn fallen leaves back into soil, feed birds and mammals, and keep the forest breathing.
The scientists gathered evidence from more than 80 untouched rainforest sites and found the same quiet pattern: fewer species, year after year. Not because of habitat loss or pollution, but because the climate itself is shifting. Stronger and more frequent El Niño events are bringing heat and drought to places that once stayed cool and damp.
Even the deepest rainforests are no longer protected by their remoteness. The world is changing around them and the silence is the first warning.
在熱帶雨林深處,本應終日充滿細微而連綿不絕的生命聲響,如今卻悄然變得稀薄。我們的生態學家發現,即使是從未受人為破壞的原始森林,節肢動物的多樣性亦正持續下滑。並非因為棲地流失或污染所致,而是日益頻繁而強烈的厄爾尼諾令雨林變得炎熱乾燥,令這些支撐生態循環的微小生命難以存活。這股無聲的改變,正悄悄改寫雨林的命運。
Journal paper: Stronger El Niños Reduce Tropical Forest Arthropod Diversity and Function (published in Nature, 2025)
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