Hydrilla is a flora found in freshwater. The Hydrilla will grow to the waters surface from a depth of up to 20 feet. This is a very familiar plant because it can almost grow in any freshwaters such as springs, rivers, fens, ditches, and lakes. Hydrillas can grow in as little as a few inches of water or in as much as 20 feet of water. This plant can grow in either oligotrophic (low nutrient) or eutrophic (high nutrient) water.  
 
The tolerance temperature level of a Hydrilla is 20o C to 27o C; consequently, it cannot stand harsh climates. The Hydrilla has long branches that open out upon reaching the surface, forming mats. The underwater stems of the Hydrilla can be as long as 25 feet. by and large off-white or yellow in color. | The roots or Rhizomes of the Hydrilla are oftentimes yellowish or off-white in color. }There are many ways a Hydrilla can procreate. Fragmentation, from seeds, from tuber, and turions (auxiliary buds) are ways how this pest reproduces.
 
The Hydrilla has many positives on its side when compared to other marine floras. Only one percent sunlight is need for the Hydrilla to grow. native plants in the same area as a Hydrilla get insubstantial amounts of foods because of the Hydrillas absorption rate. Hydrillas grow quickly, competing with native plants, and are consequently considered a pestilent pest. Hydrilla is especially dangerous because it can almost entirely take over a body of water before appearing on the surface. Hydrillas will ofttimes choke out native marine plants because they take up so much surface area absorbing the sunlight and foods.
 
Millions of dollars are spent each year on herbicides and harvesting devices in an attempt to keep this floras growth under control. Hydrilla harms the vegetation in the surrounding area making it near hopeless for fishermen to fish. Hydrilla slows down the water current and totally clogs irrigation and flood-control canals. Bathing, yachting, and fishing all are badly affected by it. Mass amounts of Hydrilla can severely lower the oxygen levels of the water it is growing in.
 
The Elodea and Egeria are frequently mixed up with the Hydrilla. Hydrilla can be identified by the teeth found on the undersurface of the midrib. But for Elodea and Egeria, this is not present. Due to these teeth, we feel the roughness of these floras when we rub over from its base to the tip. Also, Egeria has bigger blooms than the Hydrilla.
 
Hydrilla turns into solid food for macro and micro invertebrates. Species like ducks, fish, amphibians and reptiles will consume the decomposed remains of the micro and macro organisms that fed on the Hydrilla. When Hydrilla dies naturally, they are decomposed by bacteria and fungi and the end result is “detritus” a food for numerous marine invertebrates. Ducks often eat Hydrilla turions and tubers, but this is not a substantial source of food. Ducks will frequently feed on the tubers and turions of Hydrilla, but they don’t make a great diet.

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