Monitoring dissolved copper concentrations in Chesapeake Bay, U.S.A.
W S Hall1, S J Bushong, L W Hall
1Applied Physics Laboratory, Aquatic Ecology Section, The Johns Hopkins University, 20764, Shady Side, MD, USA.
Environmental Monitoring and Assessment
|November 20, 2013
Summary
Dissolved copper levels in Chesapeake Bay marinas may pose a toxic risk to aquatic life. Recreational boats are a likely source of this copper pollution.
Area of Science:
- Environmental Science
- Marine Biology
- Ecotoxicology
Background:
- Chesapeake Bay is a vital estuary facing various environmental pressures.
- Copper is a metal that can be toxic to aquatic organisms at elevated concentrations.
Purpose of the Study:
- To monitor dissolved copper concentrations in key Chesapeake Bay locations.
- To identify potential sources and ecological risks of copper pollution.
Main Methods:
- Water samples were collected over 11 months from marinas, harbors, rivers, and canals.
- Dissolved copper and water chemistry parameters were analyzed.
- Statistical analysis was used to determine concentration ranges and identify trends.
Main Results:
- Dissolved copper was frequently detected across study sites, with concentrations up to 80 μg L(-1).
- Marinas exhibited the highest copper levels, with three locations showing concentrations potentially toxic to sensitive species.
- Recreational boats were identified as a probable source of copper in one intensively studied marina.
Conclusions:
- Elevated dissolved copper in Chesapeake Bay marinas presents a significant ecotoxicological concern.
- Recreational boating activities are a likely contributor to copper pollution in these areas.
- Further investigation and management strategies are needed to mitigate copper's impact on aquatic ecosystems.
