The concept of 'blue carbon' refers to the carbon captured by the world's oceanic and coastal ecosystems, particularly mangroves, seagrasses, and salt marshes. These habitats, although covering less than 2% of the ocean surface, account for approximately 50% of all carbon buried in marine sediments. Recent research has highlighted their disproportionate role in climate mitigation, as they sequester carbon at rates up to four times higher than terrestrial forests. However, these ecosystems are under severe threat from coastal development and rising sea levels, leading to the release of stored carbon back into the atmosphere. Conservation efforts, therefore, are not merely a matter of biodiversity preservation but also a critical strategy for climate change adaptation, as protecting and restoring these habitats can enhance coastal resilience and provide long-term carbon sinks.
❓ 根据文章内容,为什么像红树林和海草床这样的沿海生态系统对减缓气候变化尤为重要?
A. 它们覆盖了海洋表面的大部分区域,并储存了海洋中大部分的碳。
B. B) 它们单位面积吸收碳的速度远高于陆地森林。
C. C)它们防止沿海开发释放所有碳。
D. D) 它们比其他生态系统更能抵御海平面上升。
✅ 正确答案
B) They absorb carbon at a much higher rate per area than land-based forests.