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Hypoxia aggravates the effects of ocean acidification on the physiological energetics of the blue mussel Mytilus edulis

Artikel i vetenskaplig tidskrift
Författare Huaxin Gu
Yueyong Shang
Jeff Clements
Samuel Dupont
Ting Wang
Shuaishuai Wei
Xinghuo Wang
Jianfang Chen
Wei Huang
Menghong Hu
Youji Wang
Publicerad i Marine Pollution Bulletin
Volym 149
ISSN 0025-326X
Publiceringsår 2019
Publicerad vid Sven Lovén centrum för marina vetenskaper
Institutionen för biologi och miljövetenskap
Språk en
Länkar https://doi.org/10.1016/j.marpolbul...
Ämnesord Bivalve, Environmental stress, Global change biology, Multiple stressors, Physiology
Ämneskategorier Marin ekologi

Sammanfattning

© 2019 Elsevier Ltd Apart from ocean acidification, hypoxia is another stressor to marine organisms, especially those in coastal waters. Their interactive effects of elevated CO2 and hypoxia on the physiological energetics in mussel Mytilus edulis were evaluated. Mussels were exposed to three pH levels (8.1, 7.7, 7.3) at two dissolved oxygen levels (6 and 2 mg L−1) and clearance rate, absorption efficiency, respiration rate, excretion rate, scope for growth and O: N ratio were measured during a14-day exposure. After exposure, all parameters (except excretion rate) were significantly reduced under low pH and hypoxic conditions, whereas excretion rate was significantly increased. Additive effects of low pH and hypoxia were evident for all parameters and low pH appeared to elicit a stronger effect than hypoxia (2.0 mg L−1). Overall, hypoxia can aggravate the effects of acidification on the physiological energetics of mussels, and their populations may be diminished by these stressors.

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