Pipefish locally adapted to low salinity in the Baltic Sea retain phenotypic plasticity to cope with ancestral salinity levels
H. Goehlich, L. Sartoris, K.-S. Wagner, C.C. Wendling, O. Roth, Frontiers in Ecology and Evolution 9 (2021).

Differentiation
N.H. Barton, in:, Encyclopedia of Biodiversity, 2nd ed., Elsevier, 2013, pp. 508–515.