We conducted a mesocosm experiment to assess the independent and combined impact of ecosystem engineers (Mytilus trossulus and Zostera marina) and the presence of the non-indigenous Harris mudcrab (Rhithropanopeus harrisii) under simulated marine heatwaves, on the performance of the three species as well as the recruitment of invertebrates in soft sediments in the Archipelago Sea. The experiment was conducted between July 1st – September 30th 2022 and utilized 16 tanks, which functioned as water baths, with each mesocosm containing 6 experimental subunits.
