Interaction of living organisms with the physical or chemical environment in a body of saltwater.
A shallow elevation composed of consolidated material that may constitute a hazard to surface navigation. (AGROVOC)
Complex mixture of inorganic minerals (i.e., mostly clay, silt, and sand), decaying organic matter, water, air, and living organisms.
The land area that drains water to a particular stream, river, or lake. It is a land feature that can be identified by tracing a line along the highest elevations between two areas on a map, often a ridge.
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