Compound Extreme Events Induce Rapid Mortality in a Tropical Sea Urchin
Compound Extreme Events Induce Rapid Mortality in a Tropical Sea Urchin
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复合极端事件导致热带海胆快速死亡
DOI：
10.1086/722283
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Collin, Rachel
中科院分区：
文献类型：
--
作者：
Lucey, Noelle;Aube, Camille;Herwig, Antonia;Collin, Rachel
全球海洋热浪和脱氧事件的频率、强度和持续时间都在增加。最近的研究表明，它们的共同出现比以前认为的更常见，它们的组合可以产生快速，可怕的生物影响。我们使用海胆Echinometra lucunter来确定与单独的脱氧事件相比，脱氧事件与极端加热（复合事件）相结合时死亡率是否更快。我们还测试了先前暴露于当地热浪条件是否会加重复合事件的影响。首先将动物暴露于环境温度（28 °C）或符合局部热浪最低标准的更高温度（30.5 °C）五天。然后将动物暴露于缺氧，缺氧定义为氧气水平低于其平均临界氧气限值35%，并结合环境或极端现场温度（28 °C，32 °C）。每3小时将动物亚组从低氧处理中取出，持续24小时，以确定它们能存活多久。先前暴露于热浪条件下并没有帮助或阻碍在缺氧条件下的生存，并且在环境温度下暴露于缺氧的动物几乎没有死亡率。然而，当缺氧加上极端温度（32 °C）时，55%的动物在24小时内死亡。在我们巴拿马研究地点的珊瑚礁上，我们发现极端缺氧条件只发生在海洋热浪事件期间，2018年发生了四次复合事件。这些结果表明，短持续时间（101天）的复合事件可能是灾难性的，其持续时间的增加将严重威胁海胆种群。
The frequency, magnitude, and duration of marine heatwaves and deoxygenation events are increasing globally. Recent research suggests that their co-occurrence is more common than previously thought and that their combination can have rapid, dire biological impacts. We used the sea urchinEchinometra lucunterto determine whether mortality occurs faster when deoxygenation events are combined with extreme heating (compound events), compared to deoxygenation events alone. We also tested whether prior exposure to local heatwave conditions accentuates the impacts of compound events. Animals were first exposed for five days to either ambient temperature (28 °C) or a warmer temperature that met the minimum criteria for a local heatwave (30.5 °C). Animals were then exposed to hypoxia, defined as oxygen levels 35% below their average critical oxygen limit, combined with ambient or extreme field temperatures (28 °C, 32 °C). Subsets of animals were removed from the hypoxic treatments every 3 hours for 24 hours to determine how long they could survive. Prior exposure to heatwave conditions did not help or hinder survival under hypoxic conditions, and animals exposed to hypoxia under ambient temperatures experienced little mortality. However, when hypoxia was coupled with extreme temperatures (32 °C), 55% of the animals died within 24 hours. On the reefs at our Panama study site, we found that extreme hypoxic conditions only ever occurred during marine heatwave events, with four compound events occurring in 2018. These results show that short durations (∼1 day) of compound events can be catastrophic and that increases in their duration will severely threaten sea urchin populations.
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用于评估和预测公海和沿海脱氧和海洋健康的全球海洋氧气数据库和图集
影响因子：
3.7
作者：
Grégoire, Marilaure;Garçon, Véronique;Garcia, Hernan;Breitburg, Denise;Isensee, Kirsten;Oschlies, Andreas;Telszewski, Maciej;Barth, Alexander;Bittig, Henry C.;Carstensen, Jacob
通讯作者：
Carstensen, Jacob
影响因子：
16.6
作者：
Johnson MD;Scott JJ;Leray M;Lucey N;Bravo LMR;Wied WL;Altieri AH
通讯作者：
Altieri AH
DOI：
10.1016/j.cbpa.2016.03.020
发表时间：
2016-08-01
影响因子：
2.3
作者：
Delorme, Natali J.;Sewell, Mary A.
通讯作者：
Sewell, Mary A.
海胆属 Echinometra（棘皮动物门：Echinoidea：Echinometridae）的钻孔作为热带南美洲的微生境*
DOI：
10.1111/j.1439-0485.1996.tb00499.x
发表时间：
1996
期刊：
Marine Ecology
影响因子：
--
作者：
S. Schoppe;B. Werding
通讯作者：
B. Werding
影响因子：
2.8
作者：
Carey, Nicholas;Harianto, Januar;Byrne, Maria
通讯作者：
Byrne, Maria