在塔斯马尼亚浮游生物社区中,基于氧化物增强海洋性的赢家和输家
Kiyas Kousoulas1, Aaron Ferderer1, Ruth Eriksen1,2
1Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia.
Journal of phycology
|June 21, 2025
概括
使用氧化增强海洋性,对浮游生物群体的影响很小. 这种二氧化碳去除方法在相对较小的生态影响下提供了显著的气候效益.
科学领域:
- 海洋化学和生态学
- 气候变化缓解策略 气候变化缓解战略
背景情况:
- 海洋性增强 (OAE) 是一种用于从大气中去除二氧化碳 (CO2) 的发展战略.
- 在OAE中使用性材料将溶解的二氧化碳转化为碳酸盐,从而增加海洋吸收大气二氧化碳的能力.
- 一个关键的研究缺口是关于OAE的生态影响,特别是对海洋生物的影响.
研究的目的:
- 为了研究OAE使用氧化 (NaOH) 对塔斯马尼亚沿海浮游生物群体的影响.
- 为了比较不平衡 (模拟CO2吸收前) 和平衡 (模拟CO2吸收后) OAE条件的影响.
- 评估海洋性增加对减缓气候变化的生态后果.
主要方法:
- 在微观宇宙中封闭自然浮游生物群落.
- 应用三种处理方法:对照,不平衡的NaOH添加,平衡的NaOH和二碳酸 (NaHCO3) 添加.
- 碳酸盐化学的监测,植物浮游生物的开花 (叶绿素a) 和社区组成 (藻,动物浮游生物).
主要成果:
- 经过OAE处理,度增加了约25% (~500μmol·kg-1),理论上将海洋无机碳汇增强了21%.
- 由于CO2和pH的微小波动,平衡的OAE治疗对浮游生物群体的影响很小.
- 不平衡的治疗显示了植物浮游生物的开花稍有延迟,以及社区组成的适度变化, *Noctiluca scintillans* 的丰度减少.
结论:
- 基于氧化的OAE对浮游生物群体组成的影响相对较小,即使在极端的性扰乱下.
- 观察到的生态变化与增强的二氧化碳封存带来的潜在气候效益相比是微不足道的.
- OAE提出了一个有前途的气候变化缓解工具,对浮游生物群落产生可管理的生态影响.
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