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Latest Invasive species Stories

Invasion Of The Earthworms
2011-09-12 09:22:21

  Non-native earthworms are damaging hardwood forests [ View the Science Nation Video ] Think of earthworms and a few things come to mind: they make great bait for fishing, they aerate the soil, and they're an excellent addition to a compost pile. But what a lot of people don't know is many earthworms are actually invasive species. "The western Great Lakes region, which is the area we're focused on, has no native earthworms," says ecologist Cindy Hale, a research associate...

Invasive Insects Cost Billions
2011-09-11 04:15:13

  Homeowners and taxpayers are picking up most of the tab for damages caused by invasive tree-feeding insects that are inadvertently imported along with packing materials, live plants, and other goods. That's the conclusion of a team of biologists and economists, whose research findings are reported in the journal PLoS One last week. The authors explain that non-native, wood-boring insects such as the emerald ash borer and the Asian longhorned beetle exact an estimated $1.7...

2011-09-07 11:09:57

A U.S. Department of Agriculture (USDA) aerial photography survey of 38,000 wildfire-burned acres in Idaho provided what is believed to be the first evidence that the invasive leafy spurge weed is displacing seedlings of native mountain big sagebrush. Terry Booth, a rangeland specialist with the Agricultural Research Service (ARS) Rangeland Resources Research Unit in Cheyenne, Wyo., designed the survey using a technique he developed called Very Large Scale Aerial (VLSA) imagery. The survey...

2011-09-02 16:49:59

Northwestern University professor Dirk Brockmann and his group at the McCormick School of Engineering and Applied Science have investigated the outcomes of a previously ignored mechanism in modeling how humans travel. By challenging a long-held assumption, Brockmann, associate professor of engineering sciences and applied mathematics, hopes to create models that can more accurately predict the spread of disease and the spread of human-mediated bioinvasions. "Though there are many...

2011-08-15 09:00:00

Findings demonstrate substantial returns on screening program relative to current costs of open-door policy WASHINGTON, Aug. 15, 2011 /PRNewswire-USNewswire/ -- In a major new study published in the journal Ecological Economics, scientists and economists have, for the first time, statistically demonstrated the net benefits of doing risk assessments for the live wild animal trade. The study estimates that the long-term expected net benefits from implementing a risk screening system range...

2011-08-10 18:11:41

Threat to ecosystem biodiversity studied using multiple interactions Invasive species cost an estimated $1.4 trillion annually in their environmental and economic impacts worldwide and are second only to habitat loss as a threat to biodiversity. As scientists struggle with the challenge of controlling invasive species, the question of why some species are so successful continually arises. Recent research conducted by Dr. Alison Bennett and Dr. Sharon Strauss at the University of California,...

2011-08-10 18:06:18

Road maintenance may accidentally spread the seeds of invasice plants, according to Penn State researchers. "The road graders that are used during these operations can act like a plow, pushing seeds along the road," said Emily Rauschert, senior project associate and applied ecologist in crop and soil sciences. "They can pick up seeds of an invasive grass and spread them several orders of magnitude further than the natural dispersal." The researchers created a computer simulation based on...

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2011-08-01 09:20:00

University of Georgia student Virginia Schutte describes how a summer in Taiwan gave her the opportunity to get to the bottom of an invasive species problem in mangrove forests there By Virginia G. W. Schutte, Odum School of Ecology, University of Georgia When I was offered a chance to study in Taiwan, I was very excited for the opportunity to do environmental research in a different part of the world. But, I was also nervous about living in Asia. My only experiences with Asian culture before...

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2011-07-31 07:26:40

Invasive tree afflicting Gulf Coast was not brought to US by Ben Franklin The DNA evidence is in, and Ben Franklin didn't do it. Genetic tests on more than 1,000 Chinese tallow trees from the United States and China show the famed U.S. statesman did not import the tallow trees that are overrunning thousands of acres of U.S. coastal prairie from Florida to East Texas. "It's widely known that Franklin introduced tallow trees to the U.S. in the late 1700s," said Rice University biologist Evan...

2011-07-29 14:48:25

Invasive grasses are better equipped than natives to deal with increasing temperatures California's native grasses, already under pressure from invasive exotic grasses, are likely to be pushed aside even more as the climate warms, according to a new analysis from the University of California, Berkeley. In the study, which has been accepted for publication in the journal Global Change Biology and is now available online, UC Berkeley biologists catalogued the ranges of all 258 native grasses...


Latest Invasive species Reference Libraries

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2008-04-30 23:09:30

The Pacific Oyster (Crassostrea gigas), is the native oyster of the Pacific coast of Korea, Japan and China. It has been introduced to North America, especially in Puget Sound, Washington, and to the Australian states of Tasmania and South Australia. It is an important commercial harvest in all of these places, as well as New Zealand where the Pacific oyster has replaced the native rock oyster, Crassostrea glomerata, as the main commercial species. The Pacific oyster is an invasive species...

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