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The Northern Research Station delivers science solutions for a sustainable future, pursues collaborative research-based solutions for complex challenges, and informs land management decisions. These research highlights are just a small part of the excellent work done by the Station's researchers this year.

Recreational boats are important vectors of spread of aquatic invasive species (AIS) among waterbodies of the United States. To limit AIS spread, state and county agencies fund watercraft inspection and decontamination stations at lake access points. Researchers present a model for determining how a state planner can efficiently allocate inspection resources to county managers, who independently decide where to locate inspection stations.

A New Tool for Helping Managers Make Decisions about Inspections -- to help inform decision making, researchers developed AIS Explorer: Prioritization for Watercraft Inspections, a web-based decision-making support tool for optimizing watercraft inspection efficiency. The online dashboard incorporates data about which lakes are infested and how boats move among lakes in Minnesota (gathered from surveys at watercraft inspection stations), and it updates automatically as new entries are added to the Minnesota Department of Natural Resources Infested Water List.

This decision support tool can help counties position their limited inspection resources strategically to protect the greatest number of waterbodies and safeguard the state’s ecological and economic assets.

Lady beetles are one of the most effective, natural ways to control crop-damaging pests such as aphids. A single lady beetle can devour hundreds of aphids in its lifetime, thereby curbing the need for pesticides. Unfortunately, some lady beetles native to the U.S. and Canada are dwindling in numbers. ARS scientists are studying their declining populations.

ARS scientists at the Plum Island Animal Disease Center in Orient Point, NY, have made two important advancements against African swine fever virus, which causes a lethal disease in pigs.

Scientists with the U.S. Department of Agriculture's Agricultural Research Service (ARS) announced that a vaccine candidate for African Swine Fever (ASF) passed an important safety test required for regulatory approval, moving the vaccine one step closer to commercial availability.

Humans adores trees. But humans also migrate and trade, habits that led to the accidental introduction of insects and diseases that harm trees and alter the landscape. Examples are easy to find and may be outside your front door: American elms that once dotted streets across America succumbed to Dutch elm disease. Now all colors of ash species – black, green, white, pumpkin, and blue – are threatened by emerald ash borer. The already uncommon butternut tree, also known as white walnut, faces the possibility of extinction from a mysterious attacker. Many invasive insects and fungi come from regions where native trees have evolved to resist their attacks. When these species enter the United States, they find trees that lack this resistance. There's no immediate end to this dismal pipeline, but there is hope on the horizon.

USDA's Agricultural Research Service (ARS) is rolling out Tellus, its new online communications platform, replacing its legacy AgResearch online magazine. ARS is committed to sharing the stories of its scientists and their successes and looks forward to informing and entertaining viewers about the many ways ARS’ revolutionary research impacts the growing world.

Agricultural Research Service (ARS) scientists are tracking a honey bee killer, and their investigations have taken them from hives in Tucson, Arizona, to Bismarck, North Dakota. Led by ARS entomologist Gloria DeGrandi-Hoffman, the team is staking out hive entrances and monitoring the comings and goings of foraging honey bees, which may be the killer's unwitting accomplices. None of the busy little winged bearers of pollen and nectar will get by without inspection: The prime suspect—an eight-legged, pinhead-sized parasite called the Varroa mite—seems to be sneaking into the hives on the bees' bodies. The Varroa mite, Varroa destructor, is considered public enemy number one to honey bees nationwide. The parasite feeds on the blood of adult bees and their brood, weakening them and endangering the entire hive when infestations become severe. But the mite also poses an indirect threat to more than 90 flowering crops that depend on bee pollination, including almonds, apples, blueberries, cherries, and cantaloupes.

Emerald ash borer (EAB) is an invasive insect from Asia that kills ash trees. EAB was first detected in North America in 2002. Several tiny wasp species are helping to control EAB.

It has been a wild year with lots of challenges, but MAISRC is still here and working as hard as ever to develop research-based solutions to reduce the impacts of aquatic invasive species in Minnesota. MAISRC hopes the research highlights included in the report will surprise, inspire, and give you hope.

See also: Stop the Spread of Spiny Water Fleas Campaign resources

The Herpetological Research Team at the USGS Forest and Rangeland Ecosystem Science Center uses innovative tools to investigate the invasion and spread of American bullfrogs in Washington and Oregon and understand how bullfrogs are interacting with native amphibians.