Breeding Site Enhancement

image of restored marshbird habitat

Marshbird habitat restored within Imperial National Wildlife Refuge, near Yuma, AZ 

Amphibians use surface water for breeding sites where they race against time to emerge before the site dries. Extending the hydroperiod can help increase the chances of successful metamorphosis.

image of American bullfrog

The American bullfrog (Rana catesbeiana) is classified as an invasive species by the California Department of Fish and Wildlife.

However, if permanent or relatively permanent waters are added, invasive species such as the American Bullfrog or crayfish can survive.

Dead dove and Africanized bees decompose in an constructed wildlife water. Rain does not flush these catchments out the same way natural water sites are cleaned, leading to an accumulation of organic matter and large concentrations of ammonia.

Article: Water Quality: A Hidden Danger in Anthropogenic Desert Catchments

Kerry Griffis-Kyle

Additionally changing the form of the water body can change the thermal and chemical environment and may have negative consequences for amphibians

Screening out debris and building up sides of a natural tinaja

Debris dams, above the water site, are used to reduce the amount of sediment and organic material that arrive in water sites. The sides of natural tinajas have also been built up and the basin sealed with cement to extend hydroperiod.

Kerry Griffis-Kyle

Options for increasing the volume of water

  • Digging out accumulated sediment

  • Raising the walls

Wildlife water development south of Ajo Arizona in which windmill keeps the trough full of water. There are tadpoles in the water that has leaked out of the trough.

Kerry Griffis-Kyle

Options for adding water to site

  • Constructing new water sites

  • Windmills

  • Solar Pumps

  • Trucking