👉 In the context of marine biology and ecology, a brineless ecosystem refers to an environment where water is not contaminated with seawater or other saltwater. This means that there are no salt crystals or dissolved salts present in the water bodies, which can lead to a variety of ecological issues such as excessive salinity, increased evaporation rates, and reduced water quality. In marine environments, brineless ecosystems are often characterized by high levels of dissolved oxygen, which is essential for photosynthesis. This