预测海藻 (Ecklonia radiata) 聚类植物在气候变化下的热适应和持久性
R J Veenhof1, C Champion1,2, S A Dworjanyn1
1National Marine Science Centre, Faculty of Science and Engineering, Southern Cross University, Coffs Harbour, NSW, Australia.
Annals of botany
|September 4, 2023
概括
藻类体细胞表现出对海洋变暖的弹性,热适应表明,尽管预计温度上升,它们不会限制Ecklonia radiata的持久性.
科学领域:
- 海洋生物学 海洋生物学
- 生态生态学 生态生态学
- 气候变化科学 气候变化科学
背景情况:
- 海藻森林是重要的温带海洋生态系统,受到海洋变暖的威胁.
- 目前关于海藻衰退的预测往往忽视了平体相原体阶段的热耐受性.
- 配体植物可能比分体植物更耐热,这可能会改变未来的持久性预测.
研究的目的:
- 为了评估Ecklonia radiata体球菌的耐热性.
- 预测海洋变暖对其澳大利亚范围内的类型细胞的持久性和表现的影响.
- 为了比较体细胞的弹性与体细胞的投影.
主要方法:
- 在三个基因上不同的Ecklonia radiata体球菌种群上进行了热耐受性实验.
- 量化生存率,相对生长率 (RGR) 和性别比率对温度的反应.
- 在未来变暖场景下,利用通用增材和线性模型进行空间显式预测.
主要成果:
- 所有种群都表现出局部适应,热极值比当前温度高出2-3°C.
- 最低度的人群表现出最高的耐热性 (~70%的生存率高达27°C).
- 未来气候变暖预测显示,类细胞细胞生存率 (0-30%) 和RGR (0-2% d-1) 的最小下降.
结论:
- 埃克洛尼亚放射性植物体表现出显著的热适应性和适应预计的海洋变暖的弹性.
- 这一生命阶段不太可能成为海藻持久性的瓶.
- 这些发现与菌体预测形成鲜明对比,这表明需要在保护策略中考虑鱼的全部生命周期.
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