“Natural Selection,” an exhibition of work by artists who draw inspiration from nature, will be on view tomorrow through Sunday at Ashawagh Hall in Springs. A reception will take place Saturday evening from 5 to 8. “Jeremy Dennis: On This Site,” a photography and research project by Mr. Dennis, who is a Shinnecock tribal member, will take place at the Shinnecock Nation Cultural Center and Museum in Southampton from Saturday through Aug. 24. A reception will be held Saturday from 5 to 7 p.m.