TY - JOUR
T1 - Adaptation of a marine diatom to ocean acidification increases its sensitivity to toxic metal exposure
AU - Dai, Xiaoying
AU - Zhang, Jiale
AU - Zeng, Xiaopeng
AU - Huang, Jiali
AU - Lin, Jiamin
AU - Lu, Yucong
AU - Liang, Shiman
AU - Ye, Mengcheng
AU - Xiao, Mengting
AU - Zhao, Jingyuan
AU - Overmans, Sebastian
AU - Xia, Jianrong
AU - Jin, Peng
N1 - KAUST Repository Item: Exported on 2022-09-14
Acknowledgements: This study was supported by the National Natural Science Foundation of China (No: 41806141, 42076109).
PY - 2022/9/1
Y1 - 2022/9/1
N2 - Most previous studies investigating the interplay of ocean acidification (OA) and heavy metal on marine phytoplankton were only conducted in short-term, which may provide conservative estimates of the adaptive capacity of them. Here, we examined the physiological responses of long-term (~900 generations) OA-adapted and non-adapted populations of the diatom Phaeodactylum tricornutum to different concentrations of the two heavy metals Cd and Cu. Our results showed that long-term OA selected populations exhibited significantly lower growth and reduced photosynthetic activity than ambient CO2 selected populations at relatively high heavy metal levels. Those findings suggest that the adaptations to high CO2 results in an increased sensitivity of the marine diatom to toxic metal exposure. This study provides evidence for the costs and the cascading consequences associated with the adaptation of phytoplankton to elevated CO2 conditions, and improves our understanding of the complex interactions of future OA and heavy metal pollution in marine waters.
AB - Most previous studies investigating the interplay of ocean acidification (OA) and heavy metal on marine phytoplankton were only conducted in short-term, which may provide conservative estimates of the adaptive capacity of them. Here, we examined the physiological responses of long-term (~900 generations) OA-adapted and non-adapted populations of the diatom Phaeodactylum tricornutum to different concentrations of the two heavy metals Cd and Cu. Our results showed that long-term OA selected populations exhibited significantly lower growth and reduced photosynthetic activity than ambient CO2 selected populations at relatively high heavy metal levels. Those findings suggest that the adaptations to high CO2 results in an increased sensitivity of the marine diatom to toxic metal exposure. This study provides evidence for the costs and the cascading consequences associated with the adaptation of phytoplankton to elevated CO2 conditions, and improves our understanding of the complex interactions of future OA and heavy metal pollution in marine waters.
UR - http://hdl.handle.net/10754/680963
UR - https://linkinghub.elsevier.com/retrieve/pii/S0025326X2200738X
U2 - 10.1016/j.marpolbul.2022.114056
DO - 10.1016/j.marpolbul.2022.114056
M3 - Article
C2 - 36058179
SN - 0025-326X
VL - 183
SP - 114056
JO - Marine pollution bulletin
JF - Marine pollution bulletin
ER -
