AWWA SOURCES59174

The Tres Rios Constructed Wetlands Demonstration Project was planned, designed, and constructed toprovide habitat, water treatment, low-impact recreation, and research opportunities in MaricopaCounty, Arizona. Thewetlands area is split into three sites, with approximately 13 acres of emergent marsh, free-watersurface wetlands. Research has concentrated on water quality improvements, vegetation sustainability,mosquito control, and wildlife attraction. Soon after completion of thewetlands, beavers moved in. The arrival of the beaver was a sign that the wetlandswere doing their job in attracting native wildlife and providing habitat that has been severely degradedin the last 100 years.Then, the beavers multiplied. Using a nighttime spotlight survey, beaver numbers were estimated atsomewhere between 34 and 50 individuals. Other evidence of excessive beaver activity includedextensive damage to wetland plants from foraging, cut or girdled trees, burrows, and runways. After consultation with Wildlife Services, a cooperative non-lethal beaver research program wasestablished. This paper describes the two phases of the program. The research currently being conducted by Wildlife Services and Tres Riosstaff is vital in maintaining acceptable populations of beavers within the full-scale Tres Riosproject. The research is currently at a very early stage, but will continue for approximately four moreyears, providing the opportunity to learn much about beaver ecology in the southwestern United States,and assess efficacy of non-lethal control options. Includes 4 references.

Product Details

Edition:

Vol. - No.

Published:

01/11/2004

Number of Pages:

5

File Size:

1 file , 380 KB