Early developmental stages of native populations of Ciona intestinalis under increased temperature are affected by local habitat history.Temperature modulates marine ectotherm physiology, influencing survival, abundance and species distribution.  While native species could be susceptible to ocean warming, thermal tolerance might favour the spread of non-native species.  By contrast, C. intestinalis from anthropogenically impacted sites showed a positive response to thermal stress, with a higher proportion of larvae development, settlement and metamorphosis success being observed under increased temperature conditions. 
THERM