Zhang Lisheng, Zhang Lingling, Shi Dongtao, Wei Jing, Chang Yaqing, Zhao Chong
Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University , Dalian , China.
PeerJ. 2017 Mar 22;5:e3122. doi: 10.7717/peerj.3122. eCollection 2017.
Increases in ocean temperature due to climate change are predicted to change the behaviors of marine invertebrates. Altered behaviors of keystone ecosystem engineers such as echinoderms will have consequences for the fitness of individuals, which are expected to flow on to the local ecosystem. Relatively few studies have investigated the behavioral responses of echinoderms to long-term elevated temperature. We investigated the effects of exposure to long-term (∼31 weeks) elevated temperature (∼3 °C above the ambient water temperature) on covering, sheltering and righting behaviors of the sea urchin . Long-term elevated temperature showed different effects on the three behaviors. It significantly decreased covering behavior, including both covering behavior reaction (time to first covering) and ability (number of covered sea urchins and number of shells used for covering). Conversely, exposure to long-term elevated temperature significantly increased sheltering behavior. Righting response in was not significantly different between temperature treatments. The results provide new information into behavioral responses of echinoderms to ocean warming.
气候变化导致的海洋温度上升预计会改变海洋无脊椎动物的行为。关键生态系统工程师（如棘皮动物）行为的改变将对个体的适应性产生影响，预计这种影响会波及当地生态系统。相对较少的研究调查了棘皮动物对长期高温的行为反应。我们研究了长期（约31周）暴露于高温（比环境水温高约3°C）对海胆覆盖、躲避和翻身行为的影响。长期高温对这三种行为表现出不同的影响。它显著降低了覆盖行为，包括覆盖行为反应（首次覆盖的时间）和能力（覆盖的海胆数量以及用于覆盖的贝壳数量）。相反，暴露于长期高温显著增加了躲避行为。不同温度处理下的翻身反应没有显著差异。这些结果为棘皮动物对海洋变暖的行为反应提供了新信息。
