Complex sentence: Elkhorn Slough harbors the largest tract of tidal salt marsh in California outside of San Francisco Bay and provides much-needed habitat for hundreds of species of plants and animals, including more than 340 species of birds.
Split into simpler sentences: Elkhorn Slough harbors the largest tract of tidal salt marsh in California outside of San Francisco Bay. This ecological treasure at the center of the Monterey Bay coastline provides much-needed habitat for hundreds of species of plants and animals, including more than 340 species of birds.