Species can change is there is a mass extinction or if the type of species changed the type of climate or terrain which would would make the species evolve to its new environment so that it can survive.
A factor that tends to cause species to change can be one of two things. It can be either climate change or an invasive species.
A change in species is when species for example animals change overtime to adapt to the type of food they eat. So that way the animal will not die because they are hungry
Evolution is a change in species over time.
If there was no change in species over time, then all fossils of that species would be identical.
Species not always change over time such sponges :D
Speciation
In order to know what species would be affected by change one needs to know the type of change you are referencing.
through evolution
through evolution
evolution
Evolution is the change in species over long periods of time.
extinct.