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Displaying 3461 to 3480 of 3525

  • What Looks Like an Asian Giant Hornet

    • May 2020
    • North Carolina State University. Extension.

    • Learn about some of the common species of wasps, bees and other non-wasp species, such as hover flies and robber flies, that superficially resemble the Asian giant hornet.

  • What Makes This Invasive, Non-Native Reed Grass Thrive in the Wetlands?

    • Apr 6, 2022
    • Louisiana State University.

    • The Mississippi River Delta is home to the world’s largest contiguous swath of Phragmites australis, or more commonly known as the common reed. But the plant that can grow to nearly 20 ft. and has been a critical component in stabilizing the state’s coastal erosion is not actually native to Louisiana—well, not entirely. There are multiple P. australis genotypes. P. australis subspecies (ssp.) americanus is the native subspecies in the U.S. and Canada. However, Phragmites australis ssp. australis originated in central Europe and was subsequently introduced to the U.S. where it is now considered to be one of the most problematic invasive species in North America. "Novel genome characteristics contribute to the invasiveness of Phragmites australis (common reed)" in Molecular Ecology and recently featured in an edition of The Scientist, LSU researchers collaborated with Tulane University and the U.S. Geological Survey to study the genomic bases of P. australis and to investigate what exactly makes the invasive reed grass subspecies thrive in wetlands, in comparison to its native counterpart.

  • What to Do If You Think You Have Found an Asian Carp [PDF, 584 KB]

    • 2010
    • Invasive Carp Regional Coordinating Committee.

    • See Invasive Carp Newsroom for updated news regarding Asian carp response in the midwest.

  • What's Happening Around Florida Blog: Invasive Species

    • University of Florida. IFAS Extension.

  • What’s Killing Beech Trees?

    • Feb 3, 2020
    • USDA. ARS. Tellus.

    • A chance discovery in an Ohio woodland has turned into a multi-disciplinary, multi-agency, and multi-national effort to piece together a puzzle and understand a scourge that is killing trees by the thousands in northern states east of the Great Plains. The leaves of young beech trees are failing somehow. Scientists have figured out what causes the malady; it’s the 'how' that has them scratching their heads. Beech trees are one of the most common trees in America's northern and northeastern forests. Their nut crop feeds birds and other animals, and its wood is prized for bentwood furniture. The symptoms of beech leaf disease were plain to see – sunken dark spots on the leaves, which eventually died – but opinions differed on the cause. Was it bacterial, fungal, or viral? Then, a plant pathologist working for the State of Ohio noticed wiggly things in the leaf lesions. They turned out to be nematodes, microscopic worms that live in the soil, that had somehow managed to make it to the tree canopy 40-50 feet above ground. Nematode samples were sent to Beltsville, MD, for analysis and identification at the Agricultural Research Service (ARS) Mycology and Nematology Genetic Diversity and Biology Laboratory in Beltsville, MD. The nematode, Litylenchus crenatae, turned out to be native to Japan – the first population of L. crenatae found in the Western Hemisphere. The curious thing is that it's not a tree-killer in Japan.

  • Whatcom Weeds: Curly-Leaf Pondweed [PDF, 361 KB]

  • Whirling Disease and Oregon's Trout and Salmon

    • Oregon Department of Fish and Wildlife.

  • White Pine Blister Rust

    • Sep 2001
    • Plant Management Network. Plant Health Progress.

  • White-Nose Syndrome

    • DOI. USGS. National Wildlife Health Center.

  • White-nose Syndrome and Minnesota's Bats

    • Minnesota Department of Natural Resources.

  • White-Nose Syndrome Confirmed in Bat in Texas

    • Mar 5, 2020
    • Texas Parks and Wildlife Department.

    • For the first time, Texas Parks and Wildlife Department (TPWD) biologists have confirmed the disease white-nose syndrome (WNS) in a Texas bat. Up until this point, while the fungus that causes the disease was previously detected in Texas in 2017, there were no signs of the disease it can cause. WNS has killed millions of hibernating bats in the eastern parts of the United States, raising national concern. WNS is a fungal disease only known to occur in bats and is not a risk to people. However, bats are wild animals and should not be handled by untrained individuals. The public is encouraged to report dead or sick bats to TPWD at nathan.fuller@tpwd.texas.gov for possible testing.

  • White-nose Syndrome Detected in Bats at Devils Tower National Monument, Wyoming: Two Bats Are State's First Confirmed Cases

    • Jun 15, 2021
    • DOI. NPS. Devils Tower National Monument.

    • Wildlife researchers have confirmed the presence of white-nose syndrome (WNS) in bats at Devils Tower National Monument. While this is the first confirmation of WNS in the state, the fungus that causes WNS, Pseudogymnoascus destructans (Pd), was potentially detected in southeast Wyoming as early as 2018. Biologists from the University of Wyoming discovered evidence of WNS during surveys completed in early May 2021, when they captured and sampled bats to test for the fungus.

      The NPS will be working closely with the climbing community at Devils Tower to better understand and develop guidance for climbers to help care for and protect Wyoming’s bat populations – including how to safely clean and disinfect climbing gear. Climbers and cavers who have used gear or clothing in WNS-infected areas should not re-use them in areas not already known to have Pd fungus. If you see a sick or dead bat, report it to park rangers or Game and Fish biologists, but do not touch or pick up the bat.

  • White-Nose Syndrome in Bats

    • Idaho Department of Fish and Game.

    • White-nose syndrome (WNS) is a disease that is identified by the telltale white fungus growing on the noses of some infected bats while they hibernate. The Idaho Department of Fish and Game is asking the public to report the sighting of any active or dead bats during winter. Please call 208-454-7638 to report sightings. Idaho Fish and Game would also like to know of any sites that have hibernating bats so biologists can include them in the monitoring effort. Finally, the public is asked to not disturb hibernating bats and to respect cave closures.

  • White-Nose Syndrome in Bats

    • Indiana Department of Natural Resources.

    • White-nose syndrome (WNS) is an infectious disease responsible for unprecedented levels of mortality among hibernating bats in North America. WNS was first detected in Indiana in January 2011 during routine winter hibernacula surveys conducted by Division of Fish and Wildlife bat biologists. WNS is widely distributed throughout much of the karst region in south-central Indiana and locally established within most of the state's major concentrations of important bat hibernacula.

  • White-Nose Syndrome in Virginia

    • Virginia Department of Wildlife Resources.

  • White-Nose Syndrome Killed Over 90% of Three North American Bat Species

    • Apr 21, 2021
    • DOI. United States Geological Survey.

    • White-nose syndrome has killed over 90% of northern long-eared, little brown and tri-colored bat populations in fewer than 10 years, according to a new study published in Conservation Biology. Researchers also noted declines in Indiana bat and big brown bat populations. The findings, detailed in "The scope and severity of white-nose syndrome on hibernating bats in North America," underscore the devastating impacts of the deadly fungal disease. The research tapped into the most comprehensive data set on North American bat populations to date, which includes data from over 200 locations in 27 states and two Canadian provinces.

  • White-Nose Syndrome: A Deadly Disease of Bats

    • Ohio State University. Extension.