一个用于识别非本土海洋大藻源种群的预测框架: Chondria tumulosa 在太平洋
James T Fumo1, Patrick K Nichols1, Taylor Ely1
1School of Life Sciences, University of Hawai'i at Mānoa, Honolulu, Hawai'i, United States.
PeerJ
|June 27, 2025
概括
2016年在夏威夷首次发现的海洋红藻Chondria tumulosa正在扩散并破坏珊瑚礁. 它的原生范围仍然未知,这阻碍了控制这种入侵物种的努力.
科学领域:
- 海洋生物学 海洋生物学
- 侵入性物种 生态学 侵袭性物种 生态学
- 保护科学 保护科学
背景情况:
- 密码性海洋红藻Chondria tumulosa于2016年在夏威夷首次被发现.
- 从那时起,它的底层覆盖面增加,并扩散到帕帕哈纳乌莫科卡卡海洋国家纪念碑 (PMNM) 内的其他环礁.
- 这种藻类表现出暗示非本土起源的特征,并且正在对PMNM珊瑚礁产生负面影响.
研究的目的:
- 调查侵入性藻类Chondria tumulosa的潜在起源和传播.
- 开发用于检测目前已知的范围之外的物种的策略.
- 为保护PMNM提供缓解努力的信息.
主要方法:
- 利用环境DNA (eDNA) 测试来选潜在的源区域.
- 进行了海洋学建模,以确定可能的引入途径和来源位置.
- 进行了水中调查,显微镜和DNA条形编码,用于eDNA检测框架.
- 在全球草原中检查了保存的标本.
主要成果:
- 在选的感兴趣区域中没有发现Chondria tumulosa的阳性eDNA检测.
- 在全球草原中保存的标本中没有检测.
- 一个海洋学模型确定了潜在的引入来源,包括日本,约翰斯顿环礁,线岛,克利珀顿环礁和加拉帕戈斯群岛.
结论:
- 孔德里亚囊菌的原生范围仍然未确定,这使得入侵评估变得复杂.
- 提出了一个研究eDNA检测和利用传统方法的框架.
- 需要进一步的研究,包括从草原中测序额外的Chondria物种,以确定本地范围,并为PMNM提供保护策略.
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