Tolerance of northern Gulf of Mexico eastern oysters to chronic warming at extreme salinities
Tolerance of northern Gulf of Mexico eastern oysters to chronic warming at extreme salinities
复制标题
墨西哥湾北部东部牡蛎对极端盐度下长期变暖的耐受性
DOI：
10.1016/j.jtherbio.2021.103072
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发表时间：
2021
影响因子：
2.7
通讯作者：
La Peyre, Jerome F.
中科院分区：
文献类型：
--
作者：
Marshall, Danielle A.;Coxe, Nicholas C.;La Peyre, Megan K.;Walton, William C.;Rikard, F. Scott;Pollack, Jennifer Beseres;Kelly, Morgan W.;La Peyre, Jerome F.
东部牡蛎，Crassostrea virginica，提供关键的生态系统服务，并支持墨西哥湾（nGoM）北方亚热带河口的重要渔业和水产养殖业，在那里它是在潮下生长。它的上限临界热极限没有很好的定义，特别是当与极端盐度结合。野生C.来自四个nGoM河口的virginica，年平均盐度不同，适应28.9 °C（84 °F）的低（4.0），中等（20.0）和高（36.0）盐度，并暴露于33.3 °C（92 °F），35.6 °C（96 °F）或37.8 °C（100 °F）的目标温度，在三周内进行了测量。所有种群的牡蛎在低盐度下对温度升高最敏感，死亡更快（即，较低的半数致死时间，LT 50）比在中等和高盐度，并导致高累积死亡率在所有目标温度。在中等盐度的所有股票牡蛎死亡最慢，只有在两个最高的温度高累积死亡率。来自更南部和高盐的上拉古纳马德雷河口的F1牡蛎通常比来自较低盐度河口的牡蛎更能耐受长期高温（更高的LT 50），尤其是在最高盐度下。使用测量的温度牡蛎暴露，3天的半数致死摄氏度（LD 50）估计为每个股票在每种盐度。所有鱼类的最低3天半数致死量（35.1-36.0 ℃）是在盐度为4.0时计算的，而最高3天半数致死量（40.1-44.0 ℃）是在盐度为20.0时计算的。
The eastern oyster,Crassostrea virginica, provides critical ecosystem services and supports valuable fishery and aquaculture industries in northern Gulf of Mexico (nGoM) subtropical estuaries where it is grown subtidally. Its upper critical thermal limit is not well defined, especially when combined with extreme salinities. The cumulative mortalities of the progenies of wildC. virginicafrom four nGoM estuaries differing in mean annual salinity, acclimated to low (4.0), moderate (20.0), and high (36.0) salinities at 28.9 °C (84 °F) and exposed to increasing target temperatures of 33.3 °C (92 °F), 35.6 °C (96 °F) or 37.8 °C (100 °F), were measured over a three-week period. Oysters of all stocks were the most sensitive to increasing temperatures at low salinity, dying quicker (i.e., lower median lethal time, LT50) than at the moderate and high salinities and resulting in high cumulative mortalities at all target temperatures. Oysters of all stocks at moderate salinity died the slowest with high cumulative mortalities only at the two highest temperatures. The F1 oysters from the more southern and hypersaline Upper Laguna Madre estuary were generally more tolerant to prolonged higher temperatures (higher LT50) than stocks originating from lower salinity estuaries, most notably at the highest salinity. Using the measured temperatures oysters were exposed to, 3-day median lethal Celsius degrees (LD50) were estimated for each stock at each salinity. The lowest 3-day LD50(35.1–36.0 °C) for all stocks was calculated at a salinity of 4.0, while the highest 3-day LD50(40.1–44.0 °C) was calculated at a salinity of 20.0.