In
limnology,
sessility is that quality of an organism which rests unsupported directly on a base, either attached or unattached to a
substrate. It is a characteristic of vegetation which is anchored to the
benthic environment. There are two families of sessile
rotifers: Flosculariidae and Collothecidae. The circa
littoral zone of
coastal environments and
biomes are dominated by sessile organisms such as
oysters.
Carbonate platforms grow due to the buildup of skeletal remains of sessile organisms, usually
microorganisms, which induce carbonate precipitation through their metabolism.