Crayfish ‘trapping’ doesn’t control invasive species

Oct. 13 (UPI) — In Britain, a handful of celebrity chefs have encouraged the practice of crayfish “trapping” to control the invasion of American signal crayfish.

Unfortunately, new research — published Tuesday in the Journal of Applied Ecology — suggests the practice doesn’t work. In fact, crayfish trapping can have a host of unintended consequences.

“Trapping has been linked to a range of risks to our waterbodies, including the spread of invasive species on wet or unclean equipment, as well as the direct capture and release of invasive crayfish to seed new harvestable populations,” study co-author Eleri Pritchard told UPI in an email.

“Sadly, trapping also risks protected native wildlife, and has been responsible for the deaths of otters and water voles,” said Pritchard, a postdoctoral researcher at University College London.

American signal crayfish have led to significant declines of native crayfish in Britain and Europe. The invasive species is

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A new species of Darwin wasp from Mexico named in observance of the 2020 quarantine period

A new species of Darwin wasp from Mexico named in observance of the 2020 quarantine period
Holotype specimen of the newly described species of parasitic Darwin wasp Stethantyx covida. Credit: Andrey I. Khalaim

Scientists at the Autonomous University of Tamaulipas (UAT) in Mexico recently discovered five new species of parasitoid wasps in Mexico, but the name of one of them sounds a bit weird: covida. Why this name?


In fact, the reason is quite simple. The thing is that the team of Andrey Khalaim (also a researcher at the Zoological Institute of Russian Academy of Sciences in Saint Petersburg, Russia) and Enrique Ruíz Cancino discovered the new to science species during the 2020 global quarantine period, imposed due to the COVID-19 pandemic. Their findings are described in a newly published research article, in the peer-reviewed, open-access scientific journal ZooKeys.

“We thought that it was a good idea to remember this extraordinary year through the name of one remarkable species of Darwin wasp found in seven

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Extinctions linked to new assemblages of species — ScienceDaily

Scientists have found that as the world undergoes profound environmental change, identifying and protecting ‘novel’ communities of species can help prevent extinctions within vulnerable ecosystems.

Professor John Pandolfi and Dr Timothy Staples from the ARC Centre of Excellence for Coral Reef Studies at The University of Queensland (CoralCoE at UQ) are the lead authors of a new study in Science that looked at how combinations of plankton species changed across the world’s marine ecosystems in the past 66 million years. From this, their team developed a world first method to detect ‘novel’ communities of species across all ecosystems.

“A novel ecological community is one with combinations of species that are different to any past observations from that site,” Prof Pandolfi said. “These different species combinations can be due to new species arriving in the community, existing species leaving, or species becoming rarer or more common.”

“We found that when novel

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Newly found dinosaur fossils shed light on toothless, two-fingered species

dino1

Here’s a look at what the Oksoko avarsan dinosaurs might have looked like way back when.


Michael W. Skrepnick

Newly discovered fossils of a toothless, parrot-like dinosaur species that lived more than 68 million years ago reveal a creature with two fingers on each forearm. That’s one less digit than its close dino relatives had. 

The fossils imply that the dinosaurs may have evolved forelimb adaptations that enabled them to spread during the Late Cretaceous Period, researchers say in a new study published Wednesday in The Royal Society Open Science journal. Paleontologists from the University of Edinburgh found a number of complete skeletons of the new species during a dig in Mongolia’s Gobi Desert. 

The feathered, omnivorous Oksoko avarsan grew to around 6.5 feet (2 meters) long. In addition to two functional digits on each

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Newly discovered dinosaur species had one less finger than its relatives

dino1

Here’s a look at what the Oksoko avarsan dinosaurs might have looked like way back when.


Michael W. Skrepnick

Newly discovered fossils of a toothless, parrot-like dinosaur species that lived more than 68 million years ago show a creature with only two fingers on each forearm. That’s one less digit than its close dinosaur relatives had. 

The fossils imply that the dinosaurs may have evolved forelimb adaptations that enabled them to spread during the Late Cretaceous Period, researchers say in a new study published Wednesday in The Royal Society Open Science journal. Paleontologists from the University of Edinburgh found a number of complete skeletons of the new species during a dig in Mongolia’s Gobi Desert. 

The feathered, omnivorous Oksoko avarsan grew to around 6.5 feet (2 meters) long. In addition to two functional digits on

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Toothless dino’s lost digits point to spread of parrot-like species — ScienceDaily

A newly discovered species of toothless, two-fingered dinosaur has shed light on how a group of parrot-like animals thrived more than 68 million years ago.

The unusual species had one less finger on each forearm than its close relatives, suggesting an adaptability which enabled the animals to spread during the Late Cretaceous Period, researchers say.

Multiple complete skeletons of the new species were unearthed in the Gobi Desert in Mongolia by a University of Edinburgh-led team.

Named Oksoko avarsan, the feathered, omnivorous creatures grew to around two metres long and had only two functional digits on each forearm. The animals had a large, toothless beak similar to the type seen in species of parrot today.

The remarkably well-preserved fossils provided the first evidence of digit loss in the three-fingered family of dinosaurs known as oviraptors.

The discovery that they could evolve forelimb adaptations suggests the group could alter their diets

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World’s largest collection of moss species — ScienceDaily

Peatlands with their huge diversity of peat moss species store about 30 percent of the earth’s soil carbon. This means they store roughly twice as much carbon as all the world’s forests combined. However, peat harvesting and climate change are threatening these long-term carbon stores because there is not enough founder material for cultivating peat mosses on a large scale. In collaboration with researchers from the University of Greifswald, a team of scientists led by plant biotechnologist Professor Ralf Reski from the Faculty of Biology of the University of Freiburg in Germany has established the world’s largest laboratory collection of mosses of the genus Sphagnum. With this as a foundation, peat mosses can be grown in a sustainable and economic way. The scientists have published their research in the scientific journal New Phytologist. Melanie Heck, a PhD student, is the first author.

For their project — called MOOSzucht —

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The Battle To Save The World’s Rarest Species From Extinction Following Mauritius Oil Spill

On Monday September 24, at a virtual meeting hosted by the UN Headquarters in New York, 60 world leaders signed a ‘Leaders Pledge for Nature’ to stop the loss of biodiversity. Heads of State from France, Germany, UK, Netherlands, Panama signed.

Noticeably, the embattled political leaders from Japan and Mauritius were not signatories.

The Leaders Pledge in New York was part of an important UN Summit to avoid the world heading into a major period of biodiversity collapse, as planet Earth grapples with the highest extinction rates since homo sapiens became a distinct species, in what has been called the Sixth Mass Extinction. Rather than being caused by colliding asteroids or other natural phenomenon, this new age of extinction is being caused by man.

The front lines of this extinction battle is happening live on

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How a toxic chromium species could form in drinking water — ScienceDaily

The water crisis in Flint, Michigan, brought much-needed attention to the problem of potentially toxic metals being released from drinking water distribution pipes when water chemistry changes. Now, researchers reporting in ACS’ Environmental Science & Technology have investigated how hexavalent chromium, known as Cr(VI), can form in drinking water when corroded cast iron pipes interact with residual disinfectant. Their findings could suggest new strategies to control Cr(VI) formation in the water supply.

The metal chromium, known as Cr(0), is found in cast iron alloy, which is the most widely used plumbing material in water distribution systems. As pipes corrode, a buildup of deposits, known as scale, forms on the pipes’ inner walls. Trace chemicals in water can react with scale, forming new compounds that could be released into the water. Some of these compounds contain Cr(VI), which, at high doses, can cause lung cancer, liver damage, reproductive issues and developmental

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Alien species to increase by 36 percent globally by 2050

Oct. 1 (UPI) — The number alien species is projected to increase by 36 percent by 2050, according to a new study published Thursday in the journal Global Change Biology.

Species are classified as alien when they colonize habitat outside their native ranges.

To predict how many new species will become aliens in the decades ahead, researchers relied on a mathematical model to analyze current rates of invasion, consider the source pool of possible invaders and produce simulations based on a ‘business-as-usual’ scenario.

The model predicted that by the middle of the century, there will be 36 percent more alien plant and animal species than there were in 2005.

If current invasion rates continue apace, the data suggests Europe will fare particularly poorly, with the continent expected to welcome 2,500 new alien species over the next 45 years — a 64 percent increase, double the projected global increase.

“Our study

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