adplus-dvertising
Connect with us

Science

Beetle abundance attributed to forest fires – The Sudbury Star

Published

 on


White-spotted sawyers can bite, but won’t if you don’t bug them

A white-spotted sawyer beetle, also known locally as a pine beetle.

Postmedia file photo

Beetle-mania seems to be gripping Sudbury lately as numerous black bugs with hard wings and long antennae make their presence known — and occasionally felt.

These insects — casually referred to as pine or longhorned beetles, but properly known as white-spotted sawyers — are capable of delivering a nip, although it’s not really their nature to go looking for a fight, according to a forest entomologist.

“It’s not that they are aggressive and attacking people,” says Taylor Scarr, research director of integrated pest management with the Great Lakes Forestry Centre in Sault Ste. Marie. 

“If you are a beetle on the side of a tree and a bird comes along to pick you off, the natural defence is to try to hold on with your feet and those strong mandibles,” he says. “So if you pick one up like a bird tries to pick them up, they grab your skin because that’s what they’re on, and to them they are on the trunk of a tree.”

Scarr says the beetles, distinguished by a white spot at the back of their necks, are native to Ontario and appear every year, but may be more conspicuous in Sudbury right now because of events that occurred a couple of years ago.

“Adults lay their eggs under the bark of recently dead or dying trees, and the grubs tunnel in there and come out two years afterwards,” he said. “So what we’re seeing now in the Sudbury area, I think, is all the beetles that have come out of trees that were killed in the Temagami and Parry Sound fires two years ago.”


A white-spotted sawyer beetle travels along the edge of a garage on St. Raphael Street in Sudbury.

Jim Moodie/Sudbury Star

He says beetles can travel a couple hundred kilometres to find a new food source, and those that emerged from the burnt-over areas would be quite plentiful, as the fires created a lot of good beetle habitat.

Sudburians might also be more aware of the beetles this year simply because “people are at home more” due to COVID-19, he suggests. “So they are seeing more.”

The adult beetles are about three-quarters of an inch long, sometimes as long as an inch, with antennae that can be three times as long as their bodies.

At this time of year the adults would be mating and dining on the bark of twigs in preparation for egg-laying.

“Before they lay their eggs, they do what is called maturation feeding, so they feed on the twigs of conifer trees,” says Scarr. “They need to feed on live twigs to mature the eggs.”

The bugs are awkward flyers, he notes, as they have two sets of wings. “They have hard wings that cover the abdomen and underneath that are the membraneous wings they actually fly with, so for that beetle to fly they have to lift the hard wings,” he says. “They’re cumbersome and it takes a lot of energy to fly, but they can certainly do it.”

Females have a more mottled appearance than the males, but “both have a single white spot at the base of the hard wings on the back, behind the head.”

People will sometimes confuse a female sawyer with an invasive Asian beetle, says Scarr, as both have long antennae and speckled backs, but the invader is “a bigger, more robust insect, with white markings that are much sharper.”

In China, the Asian beetle is sometimes called a “starry sky beetle,” he says, for its constellation of white spots.

Scarr says the intruder can hitchhike on wooden pallets and has been documented twice in Ontario — in the Toronto/Vaughn area in 2003, and a decade later in the Toronto/Mississauga area — but in both cases the Canadian Food Inspection Agency launched an aggressive eradication program and just last week announced that this strategy has proven successful.

Ontarians are still urged to keep an eye out for the foreign critters, however, as they can wreak much more havoc on local tree species.

“It’s a very serious pest because it likes hardwoods, and unlike the white-spotted sawyer beetle, it can attack and kill healthy trees,” says Scarr. “It has a real preference for maples, so if it were to get out and spread, it would devastate not only the hardwood industry but the maple syrup industry.”

Examples of the invasive beetle have been found recently in South Carolina, and it’s taken root in a few other U.S. states, as well as Europe, he notes.

Our homegrown sawyer beetle, meanwhile, is feared in Europe and Asia, as it carries a parasitic worm that can cause a wilt disease in their trees.


Tyler Cobb, curator of invertebrate zoology at the Royal Alberta Museum, holds a white-spotted sawyer beetle.

Larry Wong/Postmedia file photo

Here in Ontario, however, the sawyer doesn’t pose a big problem, although crews working in wildfire zones are not too keen on them. “They can drop down your shirt or coveralls while fighting a forest fire and be quite a nuisance,” notes Scarr.

In rare cases, they can also create an unpleasant shock for a homeowner who utilized air-dried lumber to frame their building.

“If the wood isn’t kiln-treated, sometimes the grubs will survive,” says Scarr. “I’ve had five or six reports where, three to four years after someone built their home, they had the beetles come out through the drywall.”

They can also be a problem at times for lumber companies if they infest trees intended for sawmills.

For the most part, though, the beetles are simply going about their business in the bush, contributing to regeneration by hastening the decomposition process.

“If a forest fire kills the trees, they can’t stand up forever and occupy the site,” says Scarr. “So the beetles come in and start to chew on the trees; fungi and other insects invade them; and eventually they rot and fall down and get replaced by something else.”

They also provide food to birds and other critters. Pileated woodpeckers, especially, seem to have a good nose — or more to the point, ear — for the grubs.

“They can hear them when they are inside a tree, just like we can, making a chewing noise,” the forest pest expert says.

The species in fact got its name for the grinding racket its teeth can make, like that of a saw passing through wood. (Sawyer, by the way, is pronounced like Tom Sawyer, the famous Mark Twain character.)

While many find the wood borers unappealing, Scarr encourages residents to try to “ignore them,” or at least tolerate them, as it won’t be long before they are done their mating and egg laying, at which point the adults begin to die off.

“You usually seem them around this time, in June and early July, but later in the summer you might just see the odd one,” he says.

In the meantime, “they don’t harm anything,” he says. “They’re just a natural part of the ecosystem.”

Anyone who has experienced the sensation of mandibles on skin may, of course, protest that “harm” is indeed something that can be inflicted by a sawyer beetle.

But even this isn’t apt to happen too often, Scarr maintains.

“I’ve handled lots and I have never been bitten,” he says. “You just have to grab them behind the head.”

jmoodie@postmedia.com

Let’s block ads! (Why?)

728x90x4

Source link

Continue Reading

News

Here’s how Helene and other storms dumped a whopping 40 trillion gallons of rain on the South

Published

 on

 

More than 40 trillion gallons of rain drenched the Southeast United States in the last week from Hurricane Helene and a run-of-the-mill rainstorm that sloshed in ahead of it — an unheard of amount of water that has stunned experts.

That’s enough to fill the Dallas Cowboys’ stadium 51,000 times, or Lake Tahoe just once. If it was concentrated just on the state of North Carolina that much water would be 3.5 feet deep (more than 1 meter). It’s enough to fill more than 60 million Olympic-size swimming pools.

“That’s an astronomical amount of precipitation,” said Ed Clark, head of the National Oceanic and Atmospheric Administration’s National Water Center in Tuscaloosa, Alabama. “I have not seen something in my 25 years of working at the weather service that is this geographically large of an extent and the sheer volume of water that fell from the sky.”

The flood damage from the rain is apocalyptic, meteorologists said. More than 100 people are dead, according to officials.

Private meteorologist Ryan Maue, a former NOAA chief scientist, calculated the amount of rain, using precipitation measurements made in 2.5-mile-by-2.5 mile grids as measured by satellites and ground observations. He came up with 40 trillion gallons through Sunday for the eastern United States, with 20 trillion gallons of that hitting just Georgia, Tennessee, the Carolinas and Florida from Hurricane Helene.

Clark did the calculations independently and said the 40 trillion gallon figure (151 trillion liters) is about right and, if anything, conservative. Maue said maybe 1 to 2 trillion more gallons of rain had fallen, much if it in Virginia, since his calculations.

Clark, who spends much of his work on issues of shrinking western water supplies, said to put the amount of rain in perspective, it’s more than twice the combined amount of water stored by two key Colorado River basin reservoirs: Lake Powell and Lake Mead.

Several meteorologists said this was a combination of two, maybe three storm systems. Before Helene struck, rain had fallen heavily for days because a low pressure system had “cut off” from the jet stream — which moves weather systems along west to east — and stalled over the Southeast. That funneled plenty of warm water from the Gulf of Mexico. And a storm that fell just short of named status parked along North Carolina’s Atlantic coast, dumping as much as 20 inches of rain, said North Carolina state climatologist Kathie Dello.

Then add Helene, one of the largest storms in the last couple decades and one that held plenty of rain because it was young and moved fast before it hit the Appalachians, said University of Albany hurricane expert Kristen Corbosiero.

“It was not just a perfect storm, but it was a combination of multiple storms that that led to the enormous amount of rain,” Maue said. “That collected at high elevation, we’re talking 3,000 to 6000 feet. And when you drop trillions of gallons on a mountain, that has to go down.”

The fact that these storms hit the mountains made everything worse, and not just because of runoff. The interaction between the mountains and the storm systems wrings more moisture out of the air, Clark, Maue and Corbosiero said.

North Carolina weather officials said their top measurement total was 31.33 inches in the tiny town of Busick. Mount Mitchell also got more than 2 feet of rainfall.

Before 2017’s Hurricane Harvey, “I said to our colleagues, you know, I never thought in my career that we would measure rainfall in feet,” Clark said. “And after Harvey, Florence, the more isolated events in eastern Kentucky, portions of South Dakota. We’re seeing events year in and year out where we are measuring rainfall in feet.”

Storms are getting wetter as the climate change s, said Corbosiero and Dello. A basic law of physics says the air holds nearly 4% more moisture for every degree Fahrenheit warmer (7% for every degree Celsius) and the world has warmed more than 2 degrees (1.2 degrees Celsius) since pre-industrial times.

Corbosiero said meteorologists are vigorously debating how much of Helene is due to worsening climate change and how much is random.

For Dello, the “fingerprints of climate change” were clear.

“We’ve seen tropical storm impacts in western North Carolina. But these storms are wetter and these storms are warmer. And there would have been a time when a tropical storm would have been heading toward North Carolina and would have caused some rain and some damage, but not apocalyptic destruction. ”

___

Follow AP’s climate coverage at https://apnews.com/hub/climate

___

Follow Seth Borenstein on Twitter at @borenbears

___

Associated Press climate and environmental coverage receives support from several private foundations. See more about AP’s climate initiative here. The AP is solely responsible for all content.

Source link

Continue Reading

Science

‘Big Sam’: Paleontologists unearth giant skull of Pachyrhinosaurus in Alberta

Published

 on

 

It’s a dinosaur that roamed Alberta’s badlands more than 70 million years ago, sporting a big, bumpy, bony head the size of a baby elephant.

On Wednesday, paleontologists near Grande Prairie pulled its 272-kilogram skull from the ground.

They call it “Big Sam.”

The adult Pachyrhinosaurus is the second plant-eating dinosaur to be unearthed from a dense bonebed belonging to a herd that died together on the edge of a valley that now sits 450 kilometres northwest of Edmonton.

It didn’t die alone.

“We have hundreds of juvenile bones in the bonebed, so we know that there are many babies and some adults among all of the big adults,” Emily Bamforth, a paleontologist with the nearby Philip J. Currie Dinosaur Museum, said in an interview on the way to the dig site.

She described the horned Pachyrhinosaurus as “the smaller, older cousin of the triceratops.”

“This species of dinosaur is endemic to the Grand Prairie area, so it’s found here and nowhere else in the world. They are … kind of about the size of an Indian elephant and a rhino,” she added.

The head alone, she said, is about the size of a baby elephant.

The discovery was a long time coming.

The bonebed was first discovered by a high school teacher out for a walk about 50 years ago. It took the teacher a decade to get anyone from southern Alberta to come to take a look.

“At the time, sort of in the ’70s and ’80s, paleontology in northern Alberta was virtually unknown,” said Bamforth.

When paleontogists eventually got to the site, Bamforth said, they learned “it’s actually one of the densest dinosaur bonebeds in North America.”

“It contains about 100 to 300 bones per square metre,” she said.

Paleontologists have been at the site sporadically ever since, combing through bones belonging to turtles, dinosaurs and lizards. Sixteen years ago, they discovered a large skull of an approximately 30-year-old Pachyrhinosaurus, which is now at the museum.

About a year ago, they found the second adult: Big Sam.

Bamforth said both dinosaurs are believed to have been the elders in the herd.

“Their distinguishing feature is that, instead of having a horn on their nose like a triceratops, they had this big, bony bump called a boss. And they have big, bony bumps over their eyes as well,” she said.

“It makes them look a little strange. It’s the one dinosaur that if you find it, it’s the only possible thing it can be.”

The genders of the two adults are unknown.

Bamforth said the extraction was difficult because Big Sam was intertwined in a cluster of about 300 other bones.

The skull was found upside down, “as if the animal was lying on its back,” but was well preserved, she said.

She said the excavation process involved putting plaster on the skull and wooden planks around if for stability. From there, it was lifted out — very carefully — with a crane, and was to be shipped on a trolley to the museum for study.

“I have extracted skulls in the past. This is probably the biggest one I’ve ever done though,” said Bamforth.

“It’s pretty exciting.”

This report by The Canadian Press was first published Sept. 25, 2024.

The Canadian Press. All rights reserved.

Source link

Continue Reading

News

The ancient jar smashed by a 4-year-old is back on display at an Israeli museum after repair

Published

 on

 

TEL AVIV, Israel (AP) — A rare Bronze-Era jar accidentally smashed by a 4-year-old visiting a museum was back on display Wednesday after restoration experts were able to carefully piece the artifact back together.

Last month, a family from northern Israel was visiting the museum when their youngest son tipped over the jar, which smashed into pieces.

Alex Geller, the boy’s father, said his son — the youngest of three — is exceptionally curious, and that the moment he heard the crash, “please let that not be my child” was the first thought that raced through his head.

The jar has been on display at the Hecht Museum in Haifa for 35 years. It was one of the only containers of its size and from that period still complete when it was discovered.

The Bronze Age jar is one of many artifacts exhibited out in the open, part of the Hecht Museum’s vision of letting visitors explore history without glass barriers, said Inbal Rivlin, the director of the museum, which is associated with Haifa University in northern Israel.

It was likely used to hold wine or oil, and dates back to between 2200 and 1500 B.C.

Rivlin and the museum decided to turn the moment, which captured international attention, into a teaching moment, inviting the Geller family back for a special visit and hands-on activity to illustrate the restoration process.

Rivlin added that the incident provided a welcome distraction from the ongoing war in Gaza. “Well, he’s just a kid. So I think that somehow it touches the heart of the people in Israel and around the world,“ said Rivlin.

Roee Shafir, a restoration expert at the museum, said the repairs would be fairly simple, as the pieces were from a single, complete jar. Archaeologists often face the more daunting task of sifting through piles of shards from multiple objects and trying to piece them together.

Experts used 3D technology, hi-resolution videos, and special glue to painstakingly reconstruct the large jar.

Less than two weeks after it broke, the jar went back on display at the museum. The gluing process left small hairline cracks, and a few pieces are missing, but the jar’s impressive size remains.

The only noticeable difference in the exhibit was a new sign reading “please don’t touch.”

The Canadian Press. All rights reserved.

Source link

Continue Reading

Trending