Local-scale thermal history influences metabolic response of marine invertebrates

As climate change continues, anticipating species’ responses to rising temperatures requires an understanding of the drivers of thermal sensitivity, which itself may vary over space and time. We measured metabolic rates of three representative marine invertebrate species (hermit crabs Pagurus hirsutiusculus, periwinkle snails Littorina sitkana, and mussels Mytilus trossulus) and evaluated the relationship between thermal sensitivity (Q10) and thermal history. We tested the hypothesis that thermal history drives thermal sensitivity and quantified how this relationship differs over time (short-term to seasonal time scales) and between species. Organisms were collected from tide pools in Sitka, Alaska where we also recorded temperatures to characterize thermal history prior to metabolic rate assays. Using respirometry, we estimated mass-specific oxygen consumption (MO2) at ambient and increased temperatures for one individual per species per tide pool across three seasons. We evaluated rel...

随着气候变化持续推进，预测物种对升温的响应需先理解热敏感性的驱动因素——而热敏感性本身或随空间与时间变化。我们测定了三种代表性海洋无脊椎动物（绒毛细足寄居蟹Pagurus hirsutiusculus、锡特卡滨螺Littorina sitkana及托氏贻贝Mytilus trossulus）的代谢率，并评估了热敏感性（Q10）与热历史之间的关系。我们验证了“热历史驱动热敏感性”这一假设，并量化了该关系在时间维度（短期至季节尺度）及物种间的差异。实验生物采自阿拉斯加锡特卡的潮池，我们在此处记录温度以表征代谢率测定前的热历史。通过呼吸测定法，我们在三个季节中对每个潮池每种物种的个体，分别在环境温度及升温条件下估算了比质量耗氧量（MO2）。我们评估了相...