Larval Response to Parental Low pH Exposure in the Pacific Oyster Crassostrea gigas
Larval Response to Parental Low pH Exposure in the Pacific Oyster Crassostrea gigas
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DOI：
10.2983/035.038.0325
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发表时间：
2019-12
影响因子：
1.3
通讯作者：
Yaamini R. Venkataraman;L. Spencer;S. Roberts
中科院分区：
文献类型：
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作者：
Yaamini R. Venkataraman;L. Spencer;S. Roberts
随着海洋酸化对沿海生态系统的负面影响，研究海洋酸化对多代人的影响的趋势越来越大。父母暴露在海洋酸化环境中已被证明会诱发幼虫的携带效应，但成年后急性暴露于压力源是否会在压力消除后很长一段时间内影响幼虫的产生，还有待检验。为了评估暂时暴露于实验性海洋酸化如何影响生态和商业相关的太平洋牡蛎长牡蛎，将成年牡蛎暴露在低pH（7.31±0.02）或环境pH（7.82±0.02）条件下7周。然后将牡蛎在环境条件下饲养8周，随后在环境ph下进行4周的生殖条件调节。经过调节后，牡蛎被脱产，根据母亲和父亲的海洋酸化暴露程度创建了四个家庭。受精后18 h计数D-hinge幼虫数量。观察到一种性别特异性的育雏种群反应，雌性暴露在低pH条件下导致D-hinge幼虫减少。这项研究表明，海洋酸化的影响可以持续超过环境扰动经历的时间。在考虑面对环境变化的生物体持续能力时，扩大对环境记忆的理解将是有价值的。
ABSTRACT As negative effects of ocean acidification are experienced by coastal ecosystems, there is a growing trend to investigate the effect ocean acidification has on multiple generations. Parental exposure to ocean acidification has been shown to induce larval carryover effects, but whether acute exposure to a stressor as an adult can influence the larval generation long after the stress has been removed has yet to be tested. To assess how a temporary exposure to experimental ocean acidification affects the ecologically and commercially relevant Pacific oyster Crassostrea gigas, adult oysters were exposed to either low pH (7.31 ± 0.02) or ambient pH (7.82 ± 0.02) conditions for 7 wk. Oysters were then held for 8 wk in ambient conditions, and subsequently reproductively conditioned for 4 wk at ambient pH. After conditioning, the oysters were strip-spawned to create four families based on maternal and paternal ocean acidification exposure. The number of D-hinge larvae was counted 18 h postfertilization. A sex-specific brood stock response was observed, where female exposure to low pH conditions resulted in fewer D-hinge larvae. This study demonstrates that the effects of ocean acidification can last beyond the time from when the environmental perturbation is experienced. Broadening the understanding of environmental memory will be valuable when considering organismal ability to persist in the face of environmental change.