Habitats
are places where plants and
animals live, feed, and reproduce. The Casco Bay watershed
includes many productive habitat types, including upland forests,
riparian areas, salt marshes, seagrass beds, tidal mudflats, and rocky
outcrops. Those habitats are home to a diversity of species --
from lobsters and clams to beaver and moose.
Habitats of the Casco Bay watershed
Due to itswide tidal variations and varied
underwater topography, Maine has the most extensive intertidal habitat (the area between
high and low tides) found along the US Atlantic Coast. Salt
marshes along Casco Bay's edge provide critical habitat for wildlife,
filter stormwater from upland development, act as buffers during
storms, and reduce damage from flooding.
Below the
low-water line, subtidal habitats
abound with plants and animals. Casco
Bay has the largest and densest concentrations of eelgrass mapped
along the coast of Maine: more than 8,000 acres in total.
Freshwater systems -- including
1,350 miles of rivers and streams as well as many lakes -- support a
variety of fish species like alewife, trout, perch, and pickerel, as
well as birds and mammals. Upland
forests throughout the watershed provided habitat for Maine's
native animals.
Threats to habitat
Casco
Bay Casco Bay and its watershed continue to provide valuable habitat
for a range of fish and wildlife species. But habitat has been
lost or degraded by human activity, especially suburban
development. In addition to fragmenting or destroying habitat,
land development increases impervious cover, causing higher volumes of
pollutant-laden stormwater to run into streams, rivers, and coastal
waters. Humans also affect habitat by inadvertently introducing
invasive species, which can edge out native species for space and
resources, reducing biological diversity. Global climate change
is likely to alter habitat characteristics (including temperature and
precipitation), disrupting native species and opening habitats to
invasion from non-native organisms.
Click here or on the Current
Projects button to the right for examples of the habitat conservation
activities that CBEP and our partner organizations are supporting.