A single heat-stress bout induces rapid and prolonged heat acclimation in the California mussel, Mytilus californianus
A single heat-stress bout induces rapid and prolonged heat acclimation in the California mussel, Mytilus californianus
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一次热应激发作会导致加州贻贝（Mytilus californianus）快速而长时间的热适应
DOI：
10.1098/rspb.2020.2561
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Denny, Mark W.
中科院分区：
文献类型：
--
作者：
Moyen, Nicole E.;Crane, Rachel L.;Somero, George N.;Denny, Mark W.
气候变化不仅导致全球平均气温稳步上升，而且还增加了极端升温事件发生的频率。这些极端事件可能是决定生物体在其当前栖息地持续生存的能力的关键。因此，重要的是要了解生物体的耐热性如何快速获得和失去相对于极端加热事件发生在现场的频率。我们发现，加州贻贝，贻贝加州-无柄潮间带物种，经历极端的温度波动，不能行为的温度调节-可以快速（在24-48小时）获得改善的耐热性暴露后，一个单一的亚致死热应力回合（2小时，30或35°C），然后保持这种改善的耐受性长达三个星期，而无需进一步暴露于高温。这种适应性反应使极端热应激（40°C下2小时）下的存活率提高了约75%。为了解释这些实验室的研究结果在生态环境中，我们评估了4年的贻贝体温记录在该领域。大多数人（接近。64%）的连续热应激发作间隔24-48小时，但几个连续的热发作间隔长达22天。因此，M.在一次亚致死性热应激后，加利福尼亚牛保持提高的耐热性长达三周，这显著提高了它们的存活概率，因为大约33%的连续热事件间隔3-22天。作为一种固着动物，贻贝可能进化出快速获得和缓慢失去耐热性的能力，以在潮间带间歇性且通常不可预测的高温事件中生存下来。这种适应性策略可能会在气候变化预测的极端高温事件下证明是有益的。
Climate change is not only causing steady increases in average global temperatures but also increasing the frequency with which extreme heating events occur. These extreme events may be pivotal in determining the ability of organisms to persist in their current habitats. Thus, it is important to understand how quickly an organism's heat tolerance can be gained and lost relative to the frequency with which extreme heating events occur in the field. We show that the California mussel,Mytilus californianus—a sessile intertidal species that experiences extreme temperature fluctuations and cannot behaviourally thermoregulate—can quickly (in 24–48 h) acquire improved heat tolerance after exposure to a single sublethal heat-stress bout (2 h at 30 or 35°C) and then maintain this improved tolerance for up to three weeks without further exposure to elevated temperatures. This adaptive response improved survival rates by approximately 75% under extreme heat-stress bouts (2 h at 40°C). To interpret these laboratory findings in an ecological context, we evaluated 4 years of mussel body temperatures recorded in the field. The majority (approx. 64%) of consecutive heat-stress bouts were separated by 24–48 h, but several consecutive heat bouts were separated by as much as 22 days. Thus, the ability ofM. californianusto maintain improved heat tolerance for up to three weeks after a single sublethal heat-stress bout significantly improves their probability of survival, as approximately 33% of consecutive heat events are separated by 3–22 days. As a sessile animal, mussels likely evolved the capability to rapidly gain and slowly lose heat tolerance to survive the intermittent, and often unpredictable, heat events in the intertidal zone. This adaptive strategy will likely prove beneficial under the extreme heat events predicted with climate change.
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贻贝鳃纤毛活动的热阻和热阻驯化。
DOI：
10.1016/0300-9629(75)90080-8
发表时间：
1975
期刊：
Comparative biochemistry and physiology. A, Comparative physiology
影响因子：
--
作者：
K. Senius
通讯作者：
K. Senius
先前的热量积累会降低后续实验热浪期间的存活率
DOI：
--
发表时间：
2018
期刊：
影响因子：
--
作者：
Matthew R Siegle;E. Taylor;M. O’Connor
通讯作者：
M. O’Connor
影响因子：
3.3
作者：
M. Sørensen;T. Kristensen;J. M. S. Lauritzen;N. K. Noer;T. Høye;S. Bahrndorff
通讯作者：
S. Bahrndorff
潮间带海洋无脊椎动物的温度和代谢适应综述
DOI：
10.1016/0077-7579(73)90063-x
发表时间：
1973
期刊：
Netherlands Journal of Sea Research
影响因子：
--
作者：
R. Newell;B. Bayne
通讯作者：
B. Bayne
DOI：
10.2307/1542724
发表时间：
1997-04
期刊：
The Biological bulletin
影响因子：
--
作者：
D. Roberts;Gretchen E Hofmann;A. G. N. Somero
通讯作者：
D. Roberts;Gretchen E Hofmann;A. G. N. Somero