The Arctic is experiencing particularly rapid rates of warming, consequently invasive boreal
species are now able to survive the less extreme Arctic winter temperatures. Whilst
persistence of intertidal and terrestrial species in the Arctic is primarily determined by their
ability to tolerate the freezing winters, air temperatures in the Arctic summer can reach 36° C
in the intertidal, which is beyond the upper thermal limits of many marine species. This is
normally lethal for the conspicuous ecosystem engineer Mytilus edulis. Transcriptomic …

Transcriptomic analyses were undertaken on both in situ collected and experimentally
warmed blue mussels (Mytilus edulis) from Greenland. M. edulis were collected from the
Godthabsfjorden near Nuuk, Greenland (64.45555,-51.14416) at the following locations and
dates: Inner fjord (64.45941,-50.31030) on 11/06/2018; outer fjord (64.19666,-51.69) on
13/06/2018, and sub-tidal (64.19666,-51.69) on 13/06/2018 (outer fjord at 20-40cm below
the lowest low water mark). The in situ collected inner and outer fjord intertidal animals with …