Invasive Species Case Study

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Presentation transcript:

Invasive Species Case Study Quagga Mussel

The Problem…

Native Range The Quagga mussel is native to the Dnieper river in the Ukraine.

Physiology and Ecology Small freshwater bivalves (15-20mm) Filter feeders that remove phytoplankton and zooplankton from the water One adult mussel can produce one million eggs per year Larvae settle on hard surfaces and mud and live there until adulthood

Introduction to North America Found in Lake Erie in 1989 Carried in ballast water in ships Spread through the movement of water Carried on the hulls of boats over land

Spread of the Quagga

Impact of Invasive Quaggas Reduce food supply for zooplankton Increase water clarity and aquatic plants Waste decomposes and decreases oxygen Accumulate toxins Clog water intake valves May displace native mussels

Prevention and Removal Limit ballast water dumping Require cleaning of boats Chemical controls are harmful to other aquatic life Plasma sparkers prevent attachment to substrate Manual scraping may remove some mussels