![]() ![]() In this case, use common sense and be aware that the bloom can be toxic. However, because blooms can develop quickly, you may find yourself at a water body that has yet to be tested. If you happen to be at a lake or reservoir having one of the posted harmful algae bloom signs, it is best to follow the guidelines. ![]() Bluegreen algae often concentrate near or at the water surface creating scum-like blooms that are greenish (in many cases), but can be light blueish, whitish, brownish, or reddish (or a combination) in color. The Oregon Health Authority (OHA) collects and reviews available information on cyanobacteria blooms. Depending on lake conditions, an algae bloom can develop rapidly. If you are at a posted water body or are concerned about water conditions, wash your fish with clean water and only eat the filets, disposing of the skin and guts.Īlthough cyanobacteria do not always produce toxins, algal blooms can develop when nutrients (similar to fertilizers on a lawn) are high, temperatures are warm, and the water becomes stagnant. One thing to note, levels of toxins in fish from harmful algae blooms found in Nevada are usually low enough that the fish can still be eaten. Some fish filter and eat algae directly from the water, but more importantly, small planktonic animals (related to shrimp and crabs) that consume algae become food for young or filter feeding fishes. They are important in creating dissolved oxygen for fish to survive while also being the foundation of the food chain. However, most open-water algae are beneficial and become part of a healthy lake system. Since there is no way to determine the presence or toxicity by simply looking at the water, algae must be examined under a microscope and toxicity must be tested by laboratory analysis. The strength of the toxin determines whether the bloom warrants a “Warning” or “Danger” classification. Algae are a normal part of a healthy aquatic community, and many species serve as food for other aquatic creatures. For Kansas waterbodies, we often categorize algae into two general groups: blue-green algae and all other types of freshwater algae. These blooms can pose serious health risks to people and animals (pets) since they are comprised of toxin producing bluegreen algae. Recognizing Algal Blooms or How to Recognize Algal Blooms. Placement of signs indicates that water conditions have deteriorated as a result of a harmful algae bloom. While arriving at a lake or reservoir in Nevada to do some fishing, swimming, boating, water skiing, or playing with the dog in the water, you may encounter one of these posted signs:
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