Lacustuary

[2] The upper boundary of the lacustuary is that portion of the river directly affected by rising and falling water levels in the lake.

[5] Their physical and biological characteristics are also much different from the free-flowing water further upstream, and they play important roles in the ecology of both lake and river ecosystems.

[3] Biological characteristics' The biota of a lacustuary is dominated by plant and animal species adapted to lucustrine conditions.

In clean waters fish communities are dominated by native Sunfish (Lepomis sp.

In polluted, turbid, and organic enriched waters non-native fish species such as Common Carp (Cyprinus carpio) can dominate in both numbers and biomass.