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UID:4823-1764590400-1764597600@invasivemusselcollaborative.net
SUMMARY:Webinar: Golden Mussel Planning & Response
DESCRIPTION:IMC Webinar: Golden Mussel Planning & Response\n \nWebinar Summary: \nThis webinar highlights perspectives on the issue of invasive golden mussels (Limnoperna fortunei). A panel of six experts will discuss the global distribution\, biology\, ecology\, and impacts of golden mussel as well as the role of ballast water in their introduction to the United States. Four western U.S. states will also provide an update on their response and planning efforts as a result of the detection of golden mussels in California in October 2024.\n\n\n\n\n  \nPresentations include: \n\n\n\n\n\n1) The Golden Mussel Ecological Risk Screening Summary – Presenter: Kate Wyman-Grothem\, U.S. Fish and Wildlife Service Midwest Region 3 \nThis presentation will briefly summarize what is known about the global distribution\, biology\, ecology\, and impacts of introduction of the golden mussel (Limnoperna fortunei). It will also share the results of an updated climate matching analysis to predict potential for golden mussel establishment within the contiguous United States\, with special emphasis on the Great Lakes region. \n____________________________________________________________________________________________________________________________________________________________________________ \n\n2) Golden Mussel updates from California – Presenter: Martha Volkoff\, California Department of Fish and Wildlife \nGolden mussel were detected in California on October 17\, 2024\, the first known occurrence of this species in North America. Over the past year state\, federal\, and local agencies\, academia\, and diverse partners have worked to prevent the further introduction of golden mussel to non-hydrologically connected waters\, protect the environment\, critical water conveyance\, flood protection\, and power generation infrastructure\, and the economy of the state. \n____________________________________________________________________________________________________________________________________________________________________________ \n\n3) Knowns\, unknowns\, and assumptions about the role of ballast water in the introduction of golden mussels to California  – Presenter: Chris Scianni\, California State Lands Commission’s Marine Invasive Species Program \nThis presentation will summarize the information we know\, the information we think we know\, the information we do not know\, and general assumptions about the detection and introduction of golden mussels in California. The presentation will also cover the likely role that commercial shipping\, and ballast water in particular\, likely played in the introduction\, and what the state of California is doing to minimize the likelihood of spread to neighboring states and the likelihood of future introductions of fresh or brackish water species into California’s fresh or brackish water ports.  \n____________________________________________________________________________________________________________________________________________________________________________ \n\n4) Lake Tahoe AIS Prevention – Presenter: Dennis Zabaglo\, Tahoe Regional Planning Agency\nThis presentation will provide an overview of Lake Tahoe’s AIS prevention program and response to the golden mussel discovery.  \n  \n  \n____________________________________________________________________________________________________________________________________________________________________________ \n\n5) Sleepless in Seattle: Staying Ahead of the Golden Mussel in the Evergreen State – Presenter: Justin Bush\, Washington Department of Fish and Wildlife \nGolden mussels may glitter\, but their impacts are anything but shiny. In South America\, where they are well established\, this invasive species clog infrastructure\, alter ecosystems\, and drive-up costs—one 2018 report estimated more than $120 million in annual impacts to Brazil’s electricity sector alone. With the first North American detection in California\, Washington is wide awake—assessing risks\, watching key pathways like ballast water and overland conveyances\, and gearing up with early detection and response readiness. This talk will share how the Evergreen State is preparing before golden mussels can get a foothold\, why prevention beats cleanup every time\, and how collaboration across regions will help us all sleep a little easier.  \n____________________________________________________________________________________________________________________________________________________________________________ \n\n6) Updates from Montana – Presenter: Thomas Woolf\, Montana Fish\, Wildlife & Parks\, Western Regional Panel on Aquatic Nuisance Species \nThis presentation will include perspectives from Montana and the Western Regional Panel on the golden mussel invasion as well as current response efforts. \n\n 
URL:https://invasivemusselcollaborative.net/event/webinar-golden-mussel-planning-response/
CATEGORIES:Webinar
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DTSTART;TZID=America/Detroit:20260406T080000
DTEND;TZID=America/Detroit:20260406T170000
DTSTAMP:20260408T052745
CREATED:20260406T142321Z
LAST-MODIFIED:20260406T170139Z
UID:5794-1775462400-1775494800@invasivemusselcollaborative.net
SUMMARY:Webinar: Controlling Dreissenids with Copper
DESCRIPTION:IMC Webinar: \nControlling Dreissenids with Copper\n\n\n\n\n\n\n\nWebinar Summary: \nTune in to hear about the latest research on copper applications to control invasive mussels in a variety of aquatic environments. Presentations will dive into challenges and opportunities learned through the treatment of zebra and quagga mussels in lake\, river\, and reservoir ecosystems. You will hear from experts at the U.S Geological Survey\, Colorado Parks and Wildlife\, and the University of Minnesota’s Aquatic Invasive Species Research Center.\n\n\n\n\n\n\nRegister Here! \nPresentations include: \n\n\n\n\n\n1) Quashing Quagga: Fate and Effects to the Benthic Community of a Copper Treatment to Eradicate Invasive Mussels in a Large Western River – Presenter: Austin Baldwin\, U.S. Geological Survey\nCopper-based chemical treatments are commonly used to eradicate invasive mussels in small ponds and lakes\, but their use in large rivers has been limited. In 2023\, in response to a detection of invasive quagga mussels\, a 10-kilometer reach of the Snake River (Idaho\, USA)\, was treated with an unprecedented 19\,300 kg of chelated copper molluscicide to a target concentration of 1\,000 µg/L for 10 days. We assessed the transport and fate of the copper\, its accumulation in sediments\, and its exposure and effects on the non-target benthic community downstream. Findings from this study can help watershed managers plan future invasive mussel responses while protecting culturally\, economically\, and ecologically important non-target species in large rivers. \n____________________________________________________________________________________________________________________________________________________________________________ \n\n \n2) Challenges of Eradication Efforts for Zebra Mussels in Highline Lake\, Colorado\, using EarthTec QZ – Presenters: Tawni Firestone & Robert Walters Colorado Parks and Wildlife\nFollowing the detection of an isolated population of zebra mussels in Highline Lake\, Colorado\, in 2022\, an eradication effort was initiated in spring 2023. The reservoir was lowered by approximately 9.1 meters and EarthTec® QZ\, a copper-based EPA-registered molluscicide\, was applied at 4 ppm (240 μg L-1 copper). Water samples were collected prior to\, during\, and following the treatment to monitor copper concentrations and water quality parameters. An average 148.95 ± 43.46 μg L-1 dissolved copper concentrations was observed across all treatments\, with variations influenced by depth and timing of application. Sufficient copper distribution was achieved throughout the reservoir\, as confirmed by water sample analysis and geostatistical modeling. However\, suboptimal water temperatures (below 7 °C for extended periods) were maintained during the treatment. The continued presence of veligers and adult mussels in late summer 2023 was revealed by post-treatment monitoring\, indicating an unsuccessful eradication attempt. A subsequent\, more intensive retreatment in fall 2023 was completed and involved higher EarthTec QZ concentrations (8 ppm; 480 μg L-1 copper) prior to complete draining of the reservoir. Average copper concentrations were 384.79 ± 38.62 μg L-1 and slightly higher temperatures than the first treatment were observed (8.87 ± 0.98 °C). The second treatment demonstrated more effectiveness\, as no living zebra mussel or veliger detections were observed in the reservoir in 2024. The reservoir was then drained to allow for complete freezing and desiccation of any remaining mus sels over the winter 2024. While no live zebra mussels were detected within the reservoir post-draining\, two veliger detections were recently confirmed following the refilling of Highline Lake in 2025\, with reinfestation likely occurring via the Colorado River during this process. The challenges of zebra mussel eradication\, particularly the importance of optimizing treatment timing with respect to water temperature\, copper bioavailability\, and site location are highlighted in our study. \n  \n____________________________________________________________________________________________________________________________________________________________________________ \n\n4) Managing the Unmanageable: Preparing for the First Whole-Lake Copper Treatment for Zebra Mussels in Minnesota – Presenter: Olivia Nyffeler\, The University of Minnesota’s Aquatic Invasive Species Research Center\nZebra mussels (Dreissena polymorpha) have spread to nearly 380 lakes across Minnesota and once established\, are difficult to remove. Prevention remains the primary strategy due to its cost-effectiveness and ability to limit spread; however\, once a lake becomes infested\, effective management options are limited. Previous work has evaluated low-dose copper treatments at large spatial scales with promising results. Applications in bays of Lake Minnetonka (MN) have demonstrated reductions in zebra mussel settlement and veliger densities while minimizing impacts to native mussels and other non-target communities. Building on these findings\, Lake Riley\, a 296-acre mesotrophic lake in Eden Prairie/Chanhassen\, MN\, was selected for Minnesota’s first whole-lake low-dose copper treatment using EarthTec QZ. This project integrates whole-lake treatment with comprehensive ecosystem monitoring and coordination among state\, federal\, and local partners. This presentation will describe treatment implementation\, monitoring design\, and early insights\, and will discuss how results from this effort can inform the development of a real-world framework for managing established zebra mussel populations and restoring ecosystem function. \n  \n  \n 
URL:https://invasivemusselcollaborative.net/event/webinar-controlling-dreissenids-with-copper/
CATEGORIES:Webinar
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