“Lake grass” is an informal name for several very different things growing in or on fresh water. It may refer to native submerged plants, floating-leaved plants, emergent shoreline vegetation, filamentous algae or an invasive aquatic weed. Correct identification matters because native plants support lake habitat, while algae and invasive species require different management. A plant…
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Dissolved oxygen, often shortened to DO, is molecular oxygen gas mixed into water and available for aquatic organisms to breathe. It enters from the atmosphere and from photosynthesis, then is consumed by respiration, decomposition and chemical reactions. Temperature strongly affects the amount present. Depth and time of day create additional variation. The oxygen atom bound…
A marine protected area is the broad category; a marine reserve is a highly protected type within it. An MPA can allow fishing, boating, tourism or other uses under site-specific rules. A reserve generally prohibits extracting or destroying natural resources, which is why it is often called a no-take area. The names are not perfectly…
North Dakota’s official lake contour maps are available through the North Dakota Game and Fish Department. Its Fishing Waters Viewer combines bathymetric contours with access and fisheries information, while many waters also have printable PDF maps. The department describes the resource as fishing-waters maps that include lake contours; it does not claim that every lake…
