Articles tagged with Invasive Species
Researchers used eDNA to survey Japanese and signal crayfish habitats around Lake Akan, finding signal crayfish are widely distributed, potentially threatening native species. eDNA analysis identified presence or absence of aquatic organisms more reliably than conventional methods.
New research shows that mosquitoes at the northern edge of their range are successfully surviving cold winters using diapause eggs. This rapid local adaptation could impact efforts to control the spread of invasive species like Asian tiger mosquitoes, which transmit diseases such as Zika and dengue viruses.
Scientists have used DNA tests in UK waters to detect non-native species, including a potentially fatal worm. The technique could help catch invasions early on and monitor eradication efforts.
Estimates suggest that non-native pests contribute to the death of approximately 5.5 TgC per year, impacting forest carbon budgets and ecosystem services worldwide. Compensatory growth of non-host trees is observed, but most pests have not yet invaded their hosts' full ranges.
A new study reveals that despite regulations, over 60,000 exotic animals are abandoned in Spain each year, causing significant harm to the environment. The researchers argue that improving biosafety measures, training buyers, and regulating importation can help reduce this problem.
Researchers found male cane toads have smaller testes at the invasion front due to prioritizing dispersal over sex. This leads to less investment in sperm production and more energy for traveling, allowing them to stay ahead of competitors.
A new model developed by marine biologists has revealed that reef fish enter the 'danger zone' around invasive lionfish at similar rates to native predators. The study found that prey are up to twice as likely to be captured by lionfish than by native predators, highlighting the need for conservation efforts to protect vulnerable species.
Researchers found that the mere presence of Dikerogammarus villosus can reduce the effectiveness of its prey, causing them to expend more energy avoiding the predator. This phenomenon, known as a non-consumptive effect (NCE), has major localized effects on river ecosystems and may impact their recovery following perturbation.
A new study reveals the role of the exotic pet trade in introducing invasive vertebrate populations across the globe. The researchers found that socioeconomic and socioecological factors drive the trade, with basic market forces being the main impetus for exotic vertebrates.
The mosquitofish is a highly invasive species that competes with native fish and moves them away from their habitats. Removing its population and improving water quality are key strategies to control its spread in ponds and lakes.
A team of international scientists has recommended ways to manage the devastating spread of Prosopis juliflora in Baringo County, Kenya. The study calls for urgent implementation of coordinated and sustainable management to control its spread and protect rural livelihoods.
Researchers have discovered powdery mildew on phasey beans in Florida, a species native to tropical Americas. The fungus, Erysiphe fallax, also infects papaya, which could lead to significant financial losses for the industry if left unmanaged.
Researchers found that sharing waters with an invasive Asian rockpool mosquito species reduces parasitism in native eastern tree-hole mosquito species, known as a dilution effect. The presence of the invasive species decreases parasite prevalence by 13-27% compared to 72-90% when kept alone.
Researchers reconstructed the red swamp crayfish invasion routes using mitochondrial gene analysis, revealing diverse introduction scenarios in North America and Europe. Genetic data suggest additional unrecorded introductions may have occurred from the US or other invaded territories.
A study reveals that nearly half of protected areas face staffing shortages, affecting conservation progress. Meanwhile, researchers identify remote high-elevation areas with ancient trees in China. Fuel breaks aim to prevent wildfires but may create new problems, such as altering predator migration routes.
A new North Carolina State University study found that lionfish in the Atlantic and Pacific regions share genetic similarities, suggesting a population near Taiwan as the source of the invading species. The research also revealed that lionfish in the Atlantic exhibit rapid reproductive rates and voracious predation, devastating native ...
A new study reveals that ship traffic in Antarctic waters has increased up to 10-fold since the 1960s, posing a risk of invasive species altering the balance between species. The research informs future conservation management and policy for protecting Antarctica's unique biodiversity.
A recent study found that invasive lizard populations can undergo significant biological changes, such as diverging morphology and increased forelimb length, to adapt to new territories. The researchers also discovered lower levels of parasite prevalence and higher body condition in introduced populations compared to native populations.
A CABI-led international team has compiled recommendations to improve impact assessment protocols for invasive pests, aiming to enhance global food security. The study analyzed 2614 assessments of 57 non-native species and identified factors increasing protocol robustness.
A new study by McGill University researchers suggests that global shipping traffic could lead to a three-fold to 20-fold increase in marine invasion risk between now and 2050. The study projects that shipping growth will far outweigh climate change as the primary driver of bio-invasions.
Researchers at QUT developed an innovative method using drones and infrared imaging to detect koalas with high accuracy, surpassing expert observers in some areas. The technique has great potential for improving management of threatened species and detecting invasive species.
A study by University of Jyväskylä researchers found that varying environmental conditions increase the potential for invasive species to spread. Communities poorly adapted to changes are more susceptible to invasion.
Researchers warn that China's Belt and Road Initiative (BRI) threatens native species and biodiversity due to high-risk introduction hotspots along proposed Economic Corridors. The team recommends early prevention, strict surveillance, rapid response, and effective control measures to mitigate the risk of biological invasions.
New research highlights invasive species as the top threat to Australian biodiversity, affecting 82% of threatened species, while habitat changes impact 74%. The Threatened Species Recovery Hub and Centre for Invasive Species Solutions warn of an extinction crisis without innovative management options.
Researchers at University of Wisconsin-Madison found that low-abundance species like the spiny water flea can go undetected even with rigorous sampling. Increasing net size and targeting specific times of year can improve detection rates.
A new study published in Nature journal Scientific Data highlights the role of citizen scientists in tracking the spread of invasive species. The UK Ladybird Survey mapped 48,510 observations of the harlequin ladybird over a decade, showing its rapid spread across England and Wales.
A study by the Technical University of Munich found that native fish species are on the verge of extinction, while invasive species like rainbow trout and topmouth gudgeon are increasing in population. The analysis of over 30 years of data reveals a decline in specialiszed species with complex life cycles due to habitat changes.
A new invasive species, Bugula neritina, has been detected in the Ketchikan region of Alaska, along with three other non-native species. The discovery highlights the importance of early detection and monitoring to control the spread of invasive species in Alaskan waters.
A team of scientists discovered why brown tree snakes have become successful invasive species by studying their toxin and biology. The snakes' venom is 100 times more toxic to birds than mammals and was responsible for devastating native bird populations on Guam.
Scientists used ecological niche models to predict habitat suitability and invasion risk for over 900 lakes in Minnesota and Wisconsin. The models found relatively high risk of invasion in central Minnesota and eastern Wisconsin waters.
A Rutgers study finds that popular exotic pet reptiles and lizards are more likely to be released into the wild, causing ecological harm. The research highlights the need for education and resources to prevent these releases and mitigate invasive species.
New research reveals that female mosquitoes rapidly evolve more selective mating behavior when faced with existential threats from other invasive mosquito species. This adaptation is driven by genetic changes in specific gene regions and enables them to avoid sterility caused by interbreeding with male males of a different species.
Native tree seedlings proliferated after rat removal, with an average of 8 seedlings per square meter. The restored forest provides critical habitat for seabirds, crabs, and other rare species, contributing to resilient ecosystems and improved fish populations.
Researchers used citizen science to analyze slug appearances and complex weather patterns, revealing correlations between humidity, precipitation, and windspeed. This prediction method could inform targeted eradication policies against invasive species like the giant slug.
A recent study found that virtually all of Madagascar's native predators are highly sensitive to the toxic bufadienolides secreted by invasive Asian toads. This could have a significant impact on the island's already threatened fauna, including iconic species like tenrecs and fossa.
Five species of giant hammerhead flatworms have been discovered in metropolitan France and French overseas territories, including two species reaching up to 40 cm in length. The discovery raises concerns about the potential threat to native animals and soil ecology due to their predatory nature.
Scientists warn of increased infectious diseases transmitted through vectors in the coming decades. The Asian tiger mosquito, introduced via trade and tourism, has not yet filled its ecological niche globally, posing a threat to regional health.
Researchers analyzed border interceptions of ants at US and NZ ports for nearly 100 years, finding over 75% originated from countries with prior introductions. The study highlights a mode driving global spread of invasive species.
Researchers have found a strain of trichomonosis in myna bird populations in Pakistan, infecting around 20% of the birds. The disease is carried by a parasite primarily found in pigeons and larger birds of prey, posing a risk to other species due to the invasive nature of myna birds.
Researchers tracked Aedes mosquito invasions in Panama, finding evidence of multiple invasions via land and sea. The study revealed high genetic diversity in central Panama, suggesting transport networks facilitate the mixing of different molecular lineages.
Wild grey squirrels were more successful at solving complex problems than native red squirrels, with over 90% cracking the difficult task. The study suggests superior behavioural flexibility may have facilitated their dominance in the UK.
The study analyzed nearly 46,000 records of alien species from 1500-2005, finding that a substantial proportion of newly recorded species had not been previously reported elsewhere. This suggests that access to new potential alien species has increased over time, contributing to the global rise in emerging alien species.
Researchers found that invasive cane toads can rapidly adjust their thermal tolerance in response to cool conditions, a trait present in two cool-climate populations from Australia and Hawaii. This discovery has significant implications for predicting the spread of invasive species.
The study reveals that the invasive Eurasian woodwasp outcompetes and kills native species due to its larger venom glands and earlier emergence. This threatens the fragile ecosystem in North American pine forests.
A wet winter in San Francisco Bay has disrupted the balance of invasive species, allowing native species to thrive. The study found that freshwater years reset the system, creating an opportunity for management strategies to target non-native populations.
Researchers developed an eDNA assay to detect invasive freshwater clam Corbicula, finding it in four out of 11 lakes where it already existed. The test revealed the location and abundance of clams, confirming its potential for monitoring new populations and preventing ecosystem degradation.
A new version of Markowitz's portfolio theory predicts inflated growth and reduced volatility in diverse populations across the landscape. It was developed by Prof Cang Hui and colleagues to quantify population demographics and behavior in invasive species management.
A study identified 1,189 highly threatened vertebrate species on 1,288 islands with invasive species, which may endanger their survival. Conservation efforts, including biosecurity and funding strategies, are crucial to protect native animals on islands with invasive species.
A Dartmouth-led study reveals Indigenous nations are adapting to invasive species through public programs, education, and collaborative efforts with non-Indigenous governments. These initiatives not only mitigate the impact of invasive species but also protect cultural identity and traditional economic knowledge.
A recent study reveals that nearly half a million monk parakeets were imported into Mexico over five years, leading to rapid expansion across the country. The species was declared an invasive species in 2016, highlighting the need for management steps.
Researchers genotyped Aedes aegypti mosquitoes in California and found two distinct introductions and populations. The northern population is genetically diverse and likely arose from a separate introduction.
A research team has secured funding to develop the first early detection system to locate invasive non-native species and harmful components of ships' ballast water. The system combines surveillance and risk-based monitoring to mitigate threats to human health and the environment.
A new DNA tracking tool allows scientists to catalog invasive and native species in water bodies using environmental DNA. The tool, which uses polymerase chain reaction technology, can collect fish habitat data without capturing fish.
Researchers found that half of ships passing through Israel's Mediterranean coast carry damaging ascidians, which can harm marine biodiversity and ecosystem services. Dr. Noa Shenkar recommends regular maintenance to prevent ascidian infestations and emphasizes the importance of monitoring marine vessels for early detection.
A new study found that ice-free areas in Antarctica could increase by up to 25% by the end of this century, potentially creating new habitat for biodiversity. However, the warming climate may also facilitate invasive species to establish themselves.
A new continuous-discrete hybrid population model describes the invasive dynamics of zebra mussels in North American rivers. The model shows that population persistence is contingent upon moderate water temperatures and low flow velocities, and that upstream invasion success depends on these factors.
Scientists at Kyoto University discovered that yellow crazy ant workers produce two types of egg: reproductive and nutritional. The latter variety is fed to larvae and also used as a supplement for queens and other castes.
Invasive fiber-like red seaweeds have covered up to 90 percent of some areas, changing the ocean floor landscape. The new habitat supports two to three times more small creatures at the base of the food chain.
A new invasive Asian clam species has been discovered in the Illinois River near Marseilles, Illinois. The researchers used genetic tests to confirm its uniqueness, raising concerns about the impact on native clams and the ecosystem as a whole.
Children from island locations in the Bahamas prefer invasive species like feral cats and pigs, while mainland children prefer mammals. Island children also show a greater preference for native species, highlighting the need to consider human factors in conservation decisions.