Effects of marine heatwave intensity on survival and biomass of Wadden Sea intertidal bivalves: a mesocosm experiment conducted on the island of Sylt, Germany, in summer 2022

To investigate the potential impact of marine heatwaves on the intertidal fauna of the German Wadden Sea, a mesocosm experiment was conducted on the island of Sylt, Germany, from June to August 2022. Organisms of the two common bivalve species Cerastoderma edule and Macoma balthica were collected from the upper intertidal of the local Wadden Sea in May 2022. Organisms were then placed into open boxes filled with sieved sediment (1000 µm) from the sampling area, as single-species communities mimicking in-situ observed densities of 119 individuals m-2 (C. edule) and 357 m-2 (M. balthica) and with initial community wet weights corresponding to approximately 35.7 g m-2 (both species) to ensure comparability. The communities were introduced into outdoor land-based mesocosm tanks equipped with tidal simulation, seawater flow through and temperature control on June 1st, 2022. […]

为探究海洋热浪对德国威悉湾潮间带生物群落的潜在影响，于2022年6月至8月期间，在德国叙尔特岛进行了一项中宇宙实验。2022年5月，从当地威悉湾的上潮间带收集了两种常见双壳类物种——扇贝（Cerastoderma edule）和贻贝（Macoma balthica）的有机体。随后，将这些有机体放置于装有来自采样区域筛分沉积物（1000微米）的开放式箱子中，以单一物种群落模拟实地观测的密度，即每平方米119个个体（C. edule）和357个个体（M. balthica），同时初始群落含水量与约每平方米35.7克（两种物种）相对应，以确保可比性。这些群落于2022年6月1日被引入配备潮汐模拟、海水流动和温度控制的户外陆地中宇宙容器中。