在海洋酸化下,海洋化器上的海草床中pH值变化的隐性成本
Damboia Cossa1, Eduardo Infantes2, Sam Dupont3
1Department of Marine Sciences, University of Gothenburg, Kristineberg, 45178 Fiskebäckskil, Sweden; Department of Biological Sciences, Eduardo Mondlane University, 257 Maputo, Mozambique.
The Science of the total environment
|January 20, 2024
概括
海草床不能保护海幼虫免受海洋酸化的影响. 暴露于海草变异性的幼虫在较低的pH条件下表现出减少的生长和化,这表明了适应的极限.
科学领域:
- 海洋生物学 海洋生物学
- 海洋学 海洋学 海洋学
- 生态生态学 生态生态学
背景情况:
- 沿海生态系统表现出显著的环境变化,推动了当地适应.
- 了解生物对海洋酸化的敏感性需要在适当的时空尺度上评估生态.
- 在海草床上,光合作用和呼吸的日间循环在碳酸盐化学 (pH/pCO2) 中产生了相当大的变化.
研究的目的:
- 调查海幼虫 (Echinus esculentus) 是否具有应对海草驱动的环境变化的生理机制.
- 为了确定这些适应机制是否被海洋酸化所压倒.
- 评估海草床对海洋酸化对海洋化物影响的保护作用.
主要方法:
- 在流通中宇宙中,在海草 (Zostera marina) 的存在和缺席下,对海幼虫的实验比较.
- 暴露于四种不同的pH值以模拟不同的海洋酸化场景.
- 对碳酸盐化学的监测,以及对幼虫生长和净化率的测量,每天两次,持续三周.
主要成果:
- 在海草和无海草条件下,幼虫生长速度随着平均pH (T) 的下降显著下降.
- 在海草的存在下,海幼虫的生长速度较慢,特别是在最低的pH水平下.
- 在海草环境中的幼虫调节了化,在白天最大化,在晚上减少,与没有海草的幼虫不同.
结论:
- 当面对预计的海洋酸化水平时,海幼虫的本地适应机制具有局限性.
- 像海草床这样的光合作用生态系统可能不会作为对未来海洋酸化影响的避难所.
- 沿海生态系统的日间变化并不能完全减轻海洋酸化对化幼虫的负面生理影响.
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