仅事实
科学家确认导致大规模海星死亡的细菌元凶
摘要
研究人员已确定细菌 Vibrio pectenicida 是导致持续十年的海星萎缩病的病原，该病在太平洋沿岸造成超过50亿只海星死亡。
自2013年以来，一种神秘的萎缩病导致北美太平洋沿岸从墨西哥到阿拉斯加的超过50亿只海星大规模死亡。此次疫情影响了20多个物种，其中向日葵海星在最初五年内种群数量下降了约90%。
研究人员现已确认细菌 Vibrio pectenicida 是这一毁灭性疾病的病因。发表在《自然生态与进化》杂志上的研究详细描述了该细菌在感染海星的体腔液中被发现的过程。当健康海星暴露于该细菌时，超过90%的海星在一周内死于该病。
这一发现为干预策略带来了希望。科学家们正在考虑检测剩余海星的健康状况，在人工环境中繁殖，并可能将其重新引入到种群遭受重创的区域。此外，关于自然免疫和益生菌治疗的研究也在进行中。
海星数量的下降带来了显著的生态影响。向日葵海星是海胆的重要捕食者；它们的减少导致海胆数量激增，进而破坏了海带森林。海带森林是众多海洋物种的重要栖息地，并在沿海生态系统中发挥着关键作用。
了解疾病的原因是恢复海星种群及更广泛海洋环境的关键一步。研究人员对这项知识能够指导未来的保护工作充满信心。
来源
AP News事实核查
使用外部来源和数据库核实文章的事实。
✓
Confirmed
Since 2013, a mysterious wasting disease has led to the mass mortality of over 5 billion sea stars along the Pacific Coast of North America, from Mexico to Alaska.
✓
Confirmed
The epidemic has affected more than 20 species, with the sunflower sea star experiencing a population decline of approximately 90% within the first five years.
✓
Confirmed
Researchers have now identified the bacterium Vibrio pectenicida as the cause of this devastating disease.
✓
Confirmed
The study, published in Nature Ecology & Evolution, details how the bacterium was found in the coelomic fluid of infected sea stars.
✓
Confirmed
When healthy sea stars were exposed to this bacterium, over 90% succumbed to the disease within a week.
✓
Confirmed
Scientists are considering testing the health of remaining sea stars, breeding them in captivity, and potentially reintroducing them to areas where populations have been decimated.
✓
Confirmed
The decline of sea stars has had significant ecological impacts, including a surge in urchin populations and the destruction of kelp forests.
✓
Confirmed