Asian Clam

Research divers placing rubber barrier mats on the lake bottom

Asian Clams in Emerald Bay

Low densities of non-native Asian clams were discovered on the sandy sill entrance of Emerald Bay in 2010. Asian clams compete with native species for resources and can have a negative impact on water quality. In fall of 2012, 5 acres of rubber bottom barriers were placed over the clam beds to reduce/exterminate the clams and prevent them from moving further into the bay. UC Davis and University of Nevada, Reno researchers have been monitoring the effectiveness of the barriers bi-monthly for calm mortality, changes in dissolved oxygen concentrations under the barriers and impacts on native aquatic invertebrates. The barriers are were removed fall 2014.


  • University of Nevada, Reno
  • The Tahoe Regional Planning Agency
  • California State Parks
  • Tahoe Resource Conservation District
  • Lahontan Water Quality Control Board

Funding Sources:

  • Southern Nevada Public Lands Management Act (SNPLMA)
  • Lahontan Regional Water Quality Control Board