Invasive Species News and Research, November 2021

Major policy progress for both aquatic and terrestrial invasive species. Indigenous knowledge and conservation. These invasive species articles help keep you up to date on the latest research and news.
Invasive Species Management Decision Tree

Above: Decision Tree for Garlic Mustard Management, by the Midwest Invasive Plant Network.

The staff and board of the North American Invasive Species Management Association review invasive species headlines each month. This helps us stay on top of trends and further our mission to support, promote, and empower invasive species prevention and management in North America. We then share invasive species news most relevant for people who manage terrestrial and aquatic invasive species across the the United States, Canada, Mexico and the world.

Prevention, Outreach and Education

Anglers Need Tailored Messaging to Inspire Action on Invasive Species

Illinois – Read on the University of Illinois

This research supports the same outcome that came out of the foundational research that led to the development of the PlayCleanGo campaign. These researchers took it even further, looking at the three types of value systems and recommending ways to tailor invasive species messaging to encourage responsible behavior for system.

cover for Garlic Mustard in the Midwest: an overview for managers

New Research

Midwest Invasive Plant Network Publishes Garlic Mustard Overview for Managers

Midwest — Download on MIPN

“We synthesized recent research on garlic mustard and developed recommendations to help managers navigate sometimes-conflicting information about whether and how to prioritize management of this species. The 12 page guide includes a decision-support tree and a box discussion of best practices for volunteer pull events.”

New Container Aids in Biocontrol of Hemlock Woolly Adelgid

With previous methods of collection, individual insects usually had to be collected individually. But this new container overcomes the need for individual collection, saving time and money.

Montana Lake Study Reveals How Invasive Species Affect Native Food Webs

Montana — Read on Science Daily

A new collaborative study lends greater insight into how invasive species progressively affect native food webs in mountain lakes. 

Eating Invasive Fire Ants May Protect Fence Lizards

Southeastern U.S. – Read on The Wildlife Society

Eastern fence lizards may be eating their way to immunity from invasive ant venom in the Southeastern United States.

The Westin Maui Resort & Spa Chief Engineer Duane Sparkman (center) is presented the 2021 Malama i ka Aina Award from Maui Invasive Species Committee Manager Adam Radford (left) and Maui Association of Landscape Professionals President Allison Wright.
The Westin Maui Resort & Spa Chief Engineer Duane Sparkman (center) is presented the 2021 Malama i ka Aina Award from Maui Invasive Species Committee Manager Adam Radford (left) and Maui Association of Landscape Professionals President Allison Wright. Photo from the Maui Invasive Species Committee.

Detection, Management and Control

Resort Engineer Receives Invasive Species Award

Hawaii — Read on Maui News

The annual award recognizes efforts within the landscape and agricultural community toward stopping the spread of invasive species in Maui County.

Deer and Invasive Species Threaten Long-term Survival of Pennsylvania’s Forests

Pennsylvania — Read/Listen on The Allegheny Front/90.5 WESA

Without these seeds and young trees, the forest is unable to regenerate its next generation of trees. “Between the invasive species and also over-browsing by deer,” says Walter Carson, an associate professor of plant community ecology at the University of Pittsburgh, “those regenerating saplings are often gone.”

Lummi Nation Declares Disaster as Tens of Thousands of Invasive European Green Crab Found

Washington – Read on The Olympian

The Lummi Indian Business Council has passed a resolution declaring a disaster after more than 70,000 European green crab — an invasive species — were captured and removed from the Lummi Sea Pond in recent months.

European green crab
Common shore crab from the Belgian coastal waters (Westdiep) on board of RV Belgica. Though the European green crab is frequently green, they are not exclusively so, and they can also be brown or red. What distinguishes them from native crabs are its five distinct spines on each side beside the eye. Photo © Hans Hillewaert, under CC BY-SA 4.0.


Why the Bradford Pear Tree is Plaguing the South

South Carolina — Read on the New York Times

Officials in South Carolina added the Bradford pear to its State Plant Pest List this year, and initiated a ban that goes into effect on Oct. 1, 2024.

Bipartisan Bill to Stop Spread of Aquatic Invasive Species Introduced

United States – Read on Tahoe Daily Tribune

This bipartisan legislation would authorize federal land management agencies to take proven, commonsense measures to prevent the proliferation of invasive species in our nation’s waterways, lakes, reservoirs, and aqueducts. NAISMA has submitted a letter in support of the “Stop the Spread of Invasive Mussels Act.”

White House Commits to Elevating Indigenous Knowledge in Federal Policy Decisions

Washington, D.C. – Read on High Country News

The White House Office of Science and Technology Policy (OSTP) and the White House Council on Environmental Quality (CEQ) jointly released a new memorandum that commits to elevating Indigenous Traditional Ecological Knowledge (ITEK) in federal scientific and policy processes.

Sea Lamprey Control in the Great Lakes Could be Better if Canada Pays Up

Canada and U.S. — Read/Listen on Interlochen Public Radio

The species is now largely under control now thanks to an international treaty, a specialized pesticide and millions of dollars from the U.S. and Canada. But Canada hasn’t been paying its full share for over a decade.

Assessing the Capacity and Responsiveness of Kenya’s National Invasive Species System

Africa – Read on

Overall the workshop participants recommended that an invasive species management strategy should be developed—adopting a multi-species approach—followed by the establishment of a permanent body that is responsible for regulating the system, for example, the equivalent to the national climate change council.


A River’s Right to Flow

Southwestern U.S. – Read on bioGraphic

Indigenous communities and conservationists around the world are challenging the view of water as a human commodity, and fighting to keep this precious resource in the ecosystems it sustains. Can the same approach work in the United States’ arid Southwest?

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