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Which organisms live in the littoral zone of a lake?
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Inland water ecosystem
Figure 1: Relationship between the density of pure water and temperature.
In the context of a lacustrine ecosystem, the littoral zone is the shallow-water area where light penetrates to the bottom, supporting a diverse range of organisms.1
The biological community in this zone is characterized by:
- Primary Producers: The area supports rooted aquatic plants, including emergent, submerged, or floating macrophytes.12
- Bottom-dwelling Animals: The zone hosts various benthos, which are organisms that live on or in the bottom sediments.12
- Associated Biota: Depending on the specific habitat, the littoral zone may also contain periphyton (microscopic organisms attached to submerged objects) and psammon (biota living within the sediments).2
As a lake undergoes ecological succession and becomes more productive, bottom plants spread throughout the littoral zone. Over time, this area may expand lakeward, eventually transitioning into a marsh as the lake fills with sediment.3