Invasive Species

Harmful Algae: A Compendium Desk Reference (executive summary)

By Tessa Getchis and Sandra Shumway.
This 16-page booklet provides a summary of the key issues and state of the science pertaining to harmful algal blooms as presented in “Harmful Algal Blooms: A Compendium Desk Reference,” to improve management and response. Print copies are available from Connecticut Sea Grant by contacting:

2014 Shrimp Expedition – Research on Invasive Shrimp

Palaemon macrodactylus, an invasive shrimp species

Shrimp are tasty and good for you, right? So why worry about invasive shrimp coming to our shores? The reason for concern is that such invasive species often thrive and compete with native species, sometimes even driving them out, and may further impact the prey species of the shrimp as well. Dr. James T. Carlton, a world-renowned expert on invasive species, led a team conducting dockside surveys to assess the spread and abundance of invasive non-native shrimp in the Northeastern United States. In the summer of 2014, with partial funding from the Northeast Sea Grant Consortium, Carlton and project coordinator Shannon Weigle launched Shrimp Expedition 2014, using floating docks at public and private marinas as sampling sites.

The ShrimpEx14 team, consisting of Dr. Carlton, colleagues from colleges and universities along the coast, and undergraduate research assistants, sampled 74 sites from Calais, Maine to Little Egg Harbor, New Jersey. Prior to the project, the invasive Asian shrimp Palaemon macrodactylus had been found from Massachusetts to northern New Jersey, but during the expedition was documented from New Hampshire to central New Jersey. The European shrimp Palaemon elegans had been reported largely from north of Cape Cod, but was found as far south as Narragansett Bay, and is expected to proceed south into Long Island Sound. The survey documented the previously unknown relative abundance of both introduced and native shrimp. The team also recorded for the first time the extent of the co-occurrence of native and introduced shrimp, as well as the first instance of both invasive species occurring together in North America. Carlton is Williams College Professor Emeritus of Marine Sciences and Director Emeritus of the Maritime Studies Program of Williams College-Mystic Seaport.

Sea Squirts as Potential Vectors of Harmful Algal Introductions

Wrack Lines - no coverTessa L. Getchis, Maria Rosa, and Sandra E. Shumway

This fact sheet is about research that shows connections between sea squirts (ascidian organisms) and harmful algal blooms. In some species, algal cells remain viable after being consumed by biofouling organisms, the invasive sea squirts. 4 pages, color illustrations.

Free. Download PDF


US Coast Guard Auxilary and Sea Partners team up with Sea Grant for Aquatic Invasive Species Outreach

aquatic invasive species outreachOn February 21, 2011, Connecticut Sea Grant held a briefing on a marine invasive species outreach project undertaken in collaboration with Divisions 7, 24 and 25 of the U.S. Coast Guard Auxiliary and the Coast Guard Sea Partners Program. Captain Joseph M. Vojvodich, U.S. Coast Guard Sector Long Island Sound was among the attendees. Connecticut Sea Grant Associate Director and Project PI Nancy Balcom recognized several individuals for helping to educate marine boaters and anglers about invasive species and the steps they can take to minimize the risk that their recreational activities lead to the introduction or spread of aquatic invasive species in Long Island Sound. Members of the Auxiliary shared messages and materials about invasive species while conducting courtesy vessel inspections. Among the project partners recognized were Bill Nelson of the Marine Safety Detachment on Long Island, MST1 Micheal Lake of Sector LIS, Ginny Lovas and Bill Ensign from Division 7, Mark Bennett of Division 24, and Mike Headd of Division 25.

The outreach program also involved ten bait retailers, several marinas, staff from the Connecticut Department of Energy and Environmental Protection, and New York Sea Grant. Funded by the EPA Long Island Sound Study through the National Fish and Wildlife Foundation, the project will continue in 2012.

The Vegetation Mosaic of Ragged Rock Creek Brackish Tidal Marsh, Connecticut River, Old Saybrook CT

Wrack Lines - no cover

William H. Moorhead III, Cary Chadwick, Sandy Prisloe, Juliana Barrett and Nels Barrett

This study used the detailed plots-based floristic descriptions of traditional phytosociology to inform scenes of high resolution imagery to characterize and map, in detail, the brackish tidal wetland plant communities of Ragged Rock Creek. An emphasis was placed on providing a baseline geographic context for plants of conservation and management interest, i.e., both state-listed plants and invasive plants. The results provided a baseline vegetation assessment and map prior to invasive Phragmites australis (common reed) control and restoration by onsite re-vegetation.

Published by Connecticut DEP. Download here

Grateloupia turuturu, a Red Alga Invading Long Island Sound

Wrack Lines - no coverNancy C. Balcom
1-page 2-sided illustrated fact sheet. A red seaweed from Japan has appeared in Long Island Sound. This fact sheet describes what it looks like, why it is a problem, and what to do about reporting sightings of it. Illustrated.

Free. Download here.
$1.50 for postage and handling, free for pick up.