Welcome to the Long Island Pine Barrens, one of the Island's premier ecosystems. The Pine Barrens once extended for about 250,000 acres across central Long Island from eastern Nassau County to eastern Suffolk County. Today, after decades of development and habitat alteration, the Pine Barrens are reduced to about 100,000 acres. Following are a set of slides that introduce the major ecological forces and processes, plant and animal species, and landscapes of the Pine Barrens.