Diane Waller

The Obed Wild and Scenic River, located on the Cumberland Plateau, is in a region where major declines and mass mortality of mussels have been observed. The Wild and Scenic River contains designated critical habitat for the federally endangered endemic Tennessee Bean ( Venustaconcha trabalis; aka Purple Bean). Water quality and habitat conditions in the Obed are critical factors for recovery of...

The Snuffbox mussel ( Epioblasma triquetra ) was a historically widespread species occurring in 210 lakes and streams in the United States and Canada; however, the range has declined by 62% and reduced to 79 lakes and streams. Existing populations are small and isolated, increasing the risk of species extinction. These factors prompted the listing of Snuffbox as federally endangered in 2012...

The St. Croix National Scenic Riverway (SACN) is one of the best remaining refuges for declining populations of native unionid mussels in the United States and supports the only known self-sustaining population of the federally endangered Winged Mapleleaf ( Quadrula fragosa ) in the Upper Mississippi River basin. Mussel fauna are important to the river ecosystem, providing important ecological...

Assessing Impacts of Emerging and Established Diseases to Aquatic Ecosystems The decline of native freshwater mussels has the potential to devastate aquatic communities. Although factors such as habitat degradation, pollution, and invasive species have been linked to this decline, these potential causes cannot fully explain the large-scale mussel die-offs that have occurred in the past 20 years...

Assessing Impacts of Emerging and Established Diseases to Aquatic Ecosystems The role of disease in freshwater mussel declines has been largely ignored due to the lack of appropriate diagnostic tools. Furthermore, health assessment of mussels in conjunction with restoration and propagation has not been considered during stocking and augmentation activities. This project will develop standard...

Native freshwater mussels play a critical role in aquatic environments and are considered “ecosystem engineers” and indicators of water quality by constantly filtering water. Populations of native freshwater mussels have declined in recent years, and this decline has been attributed to factors such as habitat degradation, pollution, and invasive species, among others. The importance of these...

Management Tools for Dreissenid Mussels Currently, dreissenid mussel populations are spreading and becoming a growing problem in many aquatic systems, making it important to find management techniques that are selective for the invasive mussel populations while leaving the native populations intact. Control technology for dreissenids in open water currently relies on a limited number of...

Dreissenid mussels have posed an aquatic invasive species challenge in the United States since their arrival in the Great Lakes in the 1980s. Zebra ( Dreissena polymorpha ) and Quagga ( D. bugensis ) mussels are filter feeders with high reproductive capacity. Their behaviors result in altered nutrient cycles, shifts in trophic structures, and extirpation of some native species in systems where...

Management Tools for Dreissenid Mussels Carbon dioxide (CO2) has been suggested as a chemical control for a variety of invasive aquatic organisms, including Asian Carp. USGS researchers and partners evaluated the efficacy of low CO2 concentrations for preventing zebra mussel larval (veliger) settlement and during summer 2019 in a harbor of the upper Mississippi River. The lowest CO2 concentration...

Management Tools for Dreissenid Mussels USGS researchers and partners conducted an experimental application of low dose copper, as EarthTecQZ, to a bay in Lake Minnetonka, Minnesota. The veliger density and settlement were compared to that of an untreated bay within the same lake. The copper application produced a substantial reduction in zebra mussel abundance of early life stages, juvenile...

Invasive Carp Control: Carbon Dioxide Chemical controls are a vital component of many effective Integrated Pest Management plans. Carbon dioxide (CO2) is being evaluated as a new fishery chemical for invasive carps as a general toxicant or behavioral deterrent. Administration of non-selective chemicals, such as CO2, into public waters could pose a risk to non-target organisms (e.g. native mussels...

Invasive Carp Control: Carbon Dioxide Carbon dioxide (CO2) is being evaluated as a new fishery chemical for general aquatic invasive species control. Most research has focused on its effectiveness as a behavioral deterrent and lethal control or invasive carps. However, because CO2 is generally non-selective, there is potential for this new control chemical to be applied across a wide range of...