没有对热带海洋微藻Tisochrysis lutea产生玛辐射的毒性
Alexandra Bastick1, Tom Cresswell2, Jessica Tout-Lyon3
1School of Agriculture, Environment and Veterinary Sciences, Charles Sturt University, Port Macquarie, NSW, 2444, Australia; ANSTO, Lucas Heights, NSW, 2234, Australia.
Journal of environmental radioactivity
|August 2, 2025
概括
海洋微藻对自然存在的放射性物质 (NORM) 的辐射具有弹性. 这项研究表明,目前的环境选水平可能无法充分保护所有海洋生态系统免受NORM污染.
科学领域:
- 环境毒理学环境毒理学
- 海洋生物学 海洋生物学
- 辐射生态学 辐射生态学
背景情况:
- 环境风险评估需要对污染物的毒理数据,包括自然存在的放射性物质 (NORM).
- 现有的对非人类物种的辐射毒性数据可能不能准确地反映海洋生物的敏感性.
- 在海底基础设施中NORM积累对石油和天然气开采期间和之后的海洋生态系统构成风险.
研究的目的:
- 为了评估NORM对热带海洋微藻的辐射毒性.
- 为制定适当的环境指南和对海洋NORM污染的风险评估提供信息.
- 评估海洋物种对电离辐射的敏感性.
主要方法:
- 慢性增长抑制毒性测定对Tisochrysis lutea进行.
- 暴露于0.01至7.9mGy/h的剂量速率的-137源的玛辐射.
- 对于辐射暴露的无 (显著) 影响度 (N(S) EC) 的确定.
主要成果:
- 紫色体表现出对玛辐射的轻微hormesis反应.
- 对T. lutea种群增长的最小影响被观察到高达7.9mGy/h.
- 额外推算的N(S) EC为8.8mGy/h,高于相关的环境和选水平.
结论:
- 热带海洋微藻Tisochrysis lutea在测试水平上表现出对辐射暴露的弹性.
- 目前的国际辐射查水平可能无法为所有海洋生物提供足够的保护.
- 建议对更敏感的海洋物种和终点进行进一步的研究,以制定强有力的辐射水质指南.
相关概念视频
01:21Green Algae
212
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...
212
01:23Red Algae
137
Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...
137
01:19Other Algae
89
The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
89