- Most species of Gloeocapsa live in
freshwater lakes, on wet stony substrates, on tree bark, or
- in terrestrial environments such as moist
soils. Many grow on wet rocks or mountain walls,
- while some species are restricted to calcareous
- or acidic rocky surfaces. Some live within
porous rocks in hot desert regions or can be seen as black bands
on high intertidal seacoast rocks.
-
- Gloeocapsa
is the algal phycobiont in certain lichens.
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