Egeria densa
Egeria densa
(Brazilian waterweed)

Impact ID6988
Impact TypeCompetition
Study TypeObservational
Study LocationField
Impact DescriptionEgeria densa may have the potential to compete with native species. In the Hawkesbury-Negean River, increased spread of E. densa resulted in the displacement and reduced abundance of the native vallisneria Vallisneria americana. It is suspected that competition for light is responsible for the decline in vallisneria, and that floods are responsible for the rapid spread of E. densa.
Great Lakes RegionNo
LocationHawkesbury-Nepean River, Australia

Return to impacts listing for Egeria densa


The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2023]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [12/9/2023].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted.

For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.