Benefits of Hydrilla on Submerged Aquatic Vegetation in the Potomac River

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Benefits From an Exotic Species of Submerged Aquatic Vegetation

Found to produce vegetation masses dense enough to impede boat traffic and water sports in some areas, it was feared that hydrilla's spread would eliminate native SAV, and have an adverse effect on waterfowl, such as black duck, and on fish, and crabs in the tidal Potomac.

They recorded the percentage of total coverage and biomass of each species attained annually and discovered that, hydrilla was always more than 40% of the total abundance of vegetation but did not eliminate other species over the 17-year period of study. They found the percent of native SAV increased over time. Results indicated that as nitrogen concentration decreased, diversity of vegetation increased. In addition, they compared abundance of waterfowl between periods when there was no SAV and periods when exotic species of SAV were dominant. They found a positive response by waterfowl to vegetation communities dominated by exotic SAV.

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Eliminating Leaching of Fertilizer Good for the Environment - Something we hear a lot these days is that water is going to become the next oil in terms of value as a natural resource. Not only do we need more water in some locations, but we need to protect what we have, whether we live and work in the sometimes soggy Great Lakes region, or the arid west. Greenhouse operators can’t do too much about acquiring more of this valuable resource, but they can protect what lies right under their feet.

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