Climate change is predicted to promote species' range shifts and invasions from southern latitudes northwards. However, climate change does not affect the seasonal variation in day length. The length of the day in northern latitudes still depends on the position of the Earth in relation to the Sun. The photoperiodism of species -- in other words, their ability to adapt to seasonal variation in day length and quality of light -- plays an important role when species attempt to expand their distribution range northwards, experts report.

Source: Photoperiodism may slow the range shift of species northwards