Herbicide to Treat Elodea Kills Native Aquatic Plants

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Herbicide to Treat Elodea Kills Native Aquatic Vegetation

Elodea is a plant commonly found in aquariums that, if released in the wild, will dominate certain lake or river habitats, choking out native vegetation and altering the food web at all levels.

It increases sedimentation rate, allowing more sediment to settle out of the water. And it can decrease the dissolved oxygen concentration in the water because it is growing so rapidly and using up all of that oxygen. But it also just displaces native aquatic plants, which are good forage for a variety of waterfowl species.

In addition, elodea can ruin the clear-water habitat needed by grayling and spawning salmon, and give an advantage to ambush predators like northern pike.

Applications of aquatic herbicide fluridone have appeared to have worked, and there is no elodea visible in Lake Hood now, but the herbicides killed most of the other plant life in Lake Hood as well.

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Aquatic Weed Harvesting Update - The lake weed harvester began operation for the season on May 4th. This year it has been operating five days a week, with some of those days having extended hours. To date, 382 cubic yards of aquatic plants have been removed from the lake...which is 64 truckloads of lake weeds disposed of just this year! During the same period last year, 94 cubic yards of aquatic plants were removed from the lake.

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