Do estuaries have a low oxygen level?

Answer 1

Estuaries are marine environments whose Ph , salinity , and water levels vary, depending on the river that feeds the estuary and the ocean from which it derives its salinity

Many animals also burrow to avoid predation and to live in the more stable sedimental environment. However, large numbers of bacteria are found within the sediment which have a very high oxygen demand. This reduces thelevels of oxygen levels of oxygen within the sediment often resulting in partially anoxic conditions, which can be further exacerbated by limited water flux.

Answer 2

Estuaries can have low oxygen levels, especially in areas where there is high biological productivity, decomposition of organic matter, and restricted water circulation. This can lead to hypoxic or anoxic conditions, which can impact the health of marine life in the estuary.