Infrequent Fluctuations in Temperature and Salinity May Enhance Feeding in Pisaster ochraceus (Asteroidea) but Not in Dendraster excentricus (Echinoidea) Larvae
Infrequent Fluctuations in Temperature and Salinity May Enhance Feeding in Pisaster ochraceus (Asteroidea) but Not in Dendraster excentricus (Echinoidea) Larvae
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温度和盐度的不频繁波动可能会增强 Pisaster ochraceus (Asteroidea) 的摄食，但不会增强 Dendraster excentricus (Echinoidea) 幼虫的摄食
DOI：
10.1086/716054
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Kawano, Dane
中科院分区：
文献类型：
--
作者：
George, Sophie B.;Navarro, Eric;Kawano, Dane
近年来，以高温（18-23 °C）和低盐度沃茨（20‰-22‰）为特征的低盐度事件在春末和夏季有所增加，此时许多海洋无脊椎动物幼虫正在发育。本研究探讨了低盐度事件对两种棘皮动物，海星Pisaster ochraceus和砂dollarDendraexcentricus的幼虫颗粒摄食的影响。在高温低盐环境中暴露24 h后，再在高盐或低盐环境中摄食球等鞭金藻10 min。暴露Pisasterlarvae高温和低盐度，其次是低盐度喂养，并没有损害摄食率。事实上，这些幼虫摄取颗粒的速度与对照组相似，有时甚至更高。与此形成鲜明对比的是，24小时暴露于高温和低盐度，然后继续暴露于低盐度饲料，导致8臂Dendraster幼虫摄入的颗粒数量减少。两个物种的幼虫捕获非常少的颗粒返回到30‰后，低盐度事件，表明在发展过程中的低盐度事件的幼虫喂养的连续中断可能是有害的。在我们的实验中，沙元幼虫可能对低盐度事件有负面反应，因为它们被发现在受保护的海湾中，在那里它们可能很少经历这些事件。
In recent years, low-salinity events characterized by high temperatures (18–23 °C) and low-salinity waters (20‰–22‰) have increased during late spring and summer, when many marine invertebrate larvae are developing. The present study examines the effects of low-salinity events on particle ingestion for larvae of two echinoderm species, the sea starPisaster ochraceusand the sand dollarDendraster excentricus. Larvae were exposed to high temperatures and low salinities for 24 hours, followed by feeding on the algaIsochrysis galbanain high or low salinity for another 10 minutes. ExposingPisasterlarvae to high temperatures and low salinities, followed by feeding in low salinity, did not impair ingestion rates. In fact, these larvae ingested particles at similar and sometimes higher rates than those in the controls. In sharp contrast, a 24-hour exposure to a high temperature and low salinity, followed by continued exposure to low salinity to feed, led to a decrease in the number of particles ingested by 8-armDendrasterlarvae. Larvae of both species captured very few particles when returned to 30‰ after a low-salinity event, indicating that continuous interruption of larval feeding by low-salinity events during development could be deleterious. Sand dollar larvae may have responded negatively to low-salinity events in our experiments because they are found in protected bays, where they may seldom experience these events.
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影响因子：
16.6
作者：
Oostra V;Saastamoinen M;Zwaan BJ;Wheat CW
通讯作者：
Wheat CW
影响因子：
3.7
作者：
Montecino-Latorre D;Eisenlord ME;Turner M;Yoshioka R;Harvell CD;Pattengill-Semmens CV;Nichols JD;Gaydos JK
通讯作者：
Gaydos JK
海星消耗性疾病和关键物种 Pisaster ochraceus 的快速遗传变化导致大量死亡
DOI：
10.1073/pnas.1800285115
发表时间：
2018
期刊：
Proceedings of the National Academy of Sciences
影响因子：
--
作者：
Schiebelhut, Lauren M.;Puritz, Jonathan B.;Dawson, Michael N
通讯作者：
Dawson, Michael N
影响因子：
3
作者：
Klingenberg, Christian Peter
通讯作者：
Klingenberg, Christian Peter
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DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
T. Khangaonkar;W. Long;Wenwei Xu
通讯作者：
Wenwei Xu