Clean Water
Matters!

The diverse ecosystems, working
landscapes, and vibrant communities
that inspire and sustain us depend on
clean water. Learn about pollution
reduction strategies.

Healthy Habitats
Connect Us All

Lakeshores, stream banks, and wetlands are critical to clean
water and biodiversity. Learn about efforts to improve
habitat connectivity in the Basin ecosystem.

We Care for
What We Know

Recreation fosters stewardship of the Basin’s rich
natural and cultural heritage by connecting people
to the landscape while supporting local economies.
Learn about ways to explore the Basin.

Informed Citizens
Make Wiser Choices

Citizens who have an understanding and
appreciation of water resources make informed
choices about actions that might contribute to
pollution. Learn about education programs.

    Mercury Increase in Lake Champlain fish: links to fishery dynamics and extreme climatic events

    Publication Search Details
    Title: Mercury Increase in Lake Champlain fish: links to fishery dynamics and extreme climatic events
    Author: Mark Swinton, Sandra A. Nierzwicki-Bauer
    Publication Year: 2019
    Number of Pages in Article: 14
    Journal/Publication: Ecotoxicology
    Publication Type: Technical and Demonstration
    Citation:

    Mark W. Swinton, Sandra A. Nierzwicki-Bauer. (2019). Mercury increase in Lake Champlain fish: links to fishery dynamics and extreme climatic events. Ecotoxicology.

    How to Obtain: Download Now
    Abstract:

    Mercury concentrations in Lake Champlain fish increased (2011–2017) for the first time in more than two decades. The increase, however, was not consistent among species or throughout the lake. Mercury concentrations in smallmouth bass and yellow perch from the three Main Lake segments increased significantly while concentrations in the eastern portions of the lake (Northeast Arm and Malletts Bay) remained unchanged or decreased; mercury concentrations in white perch remained unchanged. Factors examined to explain the increase included: atmospheric deposition, lake temperature, chlorophyll-a, fishery dynamics, lake flooding and loading of total suspended solids (TSS). This paper examines how each factor has changed between study periods and the spatial variability associated with the change. We hypothesize fishery dynamics, flooding and TSS loading may be partially responsible for the increase in fish mercury. Both growth efficiency and biomass of fish suggest mercury concentrations would increase in the Main Lake segments and decrease in the eastern portion of the lake. Additionally, two extreme climate events in 2011 resulted in extensive flooding and a four-fold increase in annual TSS loading, both potentially increasing biotic mercury with the impact varying spatially throughout the lake. Changes to the fishery and disturbance caused by extreme climatic events have increased biotic mercury and the processes responsible need further study to identify possible future scenarios in order to better protect human and wildlife health.

    Return to Search Page

    © 2020 Lake Champlain Basin Program
    Site design: Taylor Design
    Switch To Mobile Version

    LCBP is a program partner of
    Lake Champlain Basin Program

    Lake Champlain Basin Program
    54 West Shore Road
    Grand Isle, VT 05458
    800-468-5227 (NY & VT)
    or 802-372-3213