在环境DNA检测中导航不确定性 麻烦的海洋宏观藻类
Patrick K Nichols1, Kaʻuaʻoa M S Fraiola2, Alison R Sherwood1
1School of Life Sciences, University of Hawai'i at Mānoa, Honolulu, HI, United States of America.
PloS one
|February 4, 2025
概括
一种新的环境DNA (eDNA) 测定可靠地检测出侵袭性藻类Chondria tumulosa在少量的情况下. 该工具有助于在海洋生态系统中早期发现和管理有害物种.
科学领域:
- 海洋生物学 海洋生物学
- 生态生态学 生态生态学
- 保护科学 保护科学
背景情况:
- 早期发现入侵物种对于生态系统管理至关重要.
- 环境DNA (eDNA) 提供了一个敏感的生物监测工具,但需要对错误率进行评估.
- 在稀少的数量中检测出有害物种对于根除工作至关重要.
研究的目的:
- 开发和验证一种用于检测入侵性海洋藻类Chondria tumulosa的新型eDNA试验.
- 评估测试的灵敏度和准确性,以监测殖民前线.
- 为海洋保护区的保护决策提供可靠的工具.
主要方法:
- 开发了一种对Chondria tumulosa eDNA的定量聚合酶链反应 (qPCR) 试验.
- 使用场地占用检测建模与视觉盆地覆盖估计进行校准.
- 通过高通量测序和负控验证结果.
主要成果:
- 通过eDNA测定,在被占用地点检测到C. tumulosa的概率至少为92%.
- 假阳性率为≤3%,而假阴性率为≤11%.
- 该检测有效地检测到C. tumulosa在浅水中的度低于1%.
结论:
- 新的eDNA测定是一种敏感且具有成本效益的工具,用于监测稀少的入侵物种.
- 该测试支持对受威胁的生态系统的及时管理干预,如帕帕哈纳乌莫科卡卡海上国家纪念碑.
- 平衡分子和视觉检测不确定性是有效的保护应用的关键.
相关概念视频
01:28Overview of Algae
The kingdom Archaeplastida encompasses red and green algae, along with land plants. Unlike other protists with chloroplasts that arose through secondary endosymbiosis, only red and green algae originated from primary endosymbiotic events. This diverse group of eukaryotic organisms contains chlorophyll and performs oxygenic photosynthesis.Algae exist in various forms, from large brown kelp in coastal waters to green scum in puddles and stains on rocks or soil. Some species are responsible for...
01:21Green Algae
Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...