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Invasive Species Are Costing the Global Economy Billions, Study Finds

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A new scientific report offers the most exhaustive look yet at how nonnative plants and animals can drive extinctions, disrupt food systems and harm human health.

Thousands of invasive species introduced to new ecosystems around the world are causing more than $423 billion in estimated losses to the global economy every year by harming nature, damaging food systems and threatening human health, a wide-ranging scientific report published on Monday has found.

The costs have at least quadrupled every decade since 1970, according to the report, which was based on 2019 data. Researchers warned that the cost figures were conservative estimates because of the challenges in accounting for all effects.

Over the last few centuries, humans have intentionally and unintentionally introduced more than 37,000 species to places outside their natural ranges as the world has become more interconnected, the assessment said. More than 3,500 of those are considered invasive because they are harmful to their new ecosystems.

Invasive nonnative species were a major factor in 60 percent of recorded extinctions of plants and animals, according to the report, which was produced by the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services for the United Nations. It expands on a sweeping 2019 report by the same panel, which found that as many as one million plant and animal species are at risk of extinction.

“We are seeing unprecedented increases in the numbers of alien species worldwide,” Helen Roy, an ecologist and one of the leaders of the new study, said in an interview. “It’s about 200 new alien species every year. And, yes, with those kinds of numbers, we will also see the impacts increasing.”

The report is the most exhaustive look yet at how invasive nonnative species are driving biodiversity loss. It was compiled by 86 experts from 49 countries, who drew on thousands of scientific studies and contributions from Indigenous people and local communities.

Some species are relocated by global forces like wildlife trade and international shipping. Zebra mussels, for instance, are an invasive species that has driven local mussels to the brink of extinction in the Great Lakes and forced power plants to spend millions unclogging water intakes. They probably arrived in North America on cargo ships from Europe in the 1980s. Other plants and animals have been known to hitch a ride with ordinary travelers moving by car, plane or train.

European shore crabs have invaded commercial shellfish beds in New England.Arterra/Universal Images Group, via Getty Images

Species have also been introduced intentionally for their perceived benefits and then spread out of control. Solutions, the researchers said, have to address such factors.

Not all nonnative species are considered a problem. Some, like chickens and potatoes, have been domesticated and play important roles in agriculture. But unchecked nonnative species that become invasive can severely damage food systems.

The European shore crab has invaded commercial shellfish beds in New England, for example, while the Caribbean false mussel has damaged key fisheries in India.

Invasions can also damage human health. Mosquitoes that transmit diseases like malaria, dengue fever and the Zika virus have become invasive around the world.

“Usually the poor communities are the ones that suffer the most,” said Aníbal Pauchard, another leader of the assessment. “At the same time, with climate change, you’re going to have mosquitoes going higher, you know? So getting, for example, to New York.”

Disturbed ecosystems may be unable to deliver some of the services depended on by humans, like maintaining fisheries, regulating rain patterns and purifying drinking water. Invasive species also make ecosystems more vulnerable by reducing the biodiversity that makes them resilient to diseases and other threats.

Islands are particularly vulnerable. The number of invasive nonnative species exceeds the number of native ones in more than a quarter of the world’s islands.

Aedes aegypti, a mosquito that can spread the Zika virus and dengue fever, seen through a microscope. They originated in Africa and spread around the world. Felipe Dana/Associated Press

That became vividly clear last month when wildfires in Hawaii, fueled by invasive nonnative grasses and higher temperatures, killed at least 115 people. In recent years, invasive grasses have fueled other deadly fires in Chile and Australia.

“It is a perfect storm,” said Dawn Bazely, a professor of biology at the York University in Toronto who specializes in grasses. “It is the intersection of global warming with invasive species that is creating these terrible, terrible feedbacks.”

Countries have failed to meet a target set in 2010 to reduce invasions. But, in December last year, nearly every country in the world agreed as part of a sweeping agreement to protect biodiversity to reduce the introduction and establishment of invasive species by at least half.

Researchers said that the most important way to fight the growing crisis of invasive nonnative species was to prevent their arrival in new regions. The options include assessing risks before moving species or adopting biosecurity measures that are often quite simple.

The cost of inaction is high. Once a species is established, especially in marine environments, getting rid of them is typically very expensive or even impossible.

“The problem is growing, and it is a serious threat to the quality of life of millions of people around the world,” said Peter Stoett, another of the report’s leaders. But it’s also, he added, “a manageable problem if the investment and the commitment are there.”

 

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Canada’s unemployment rate holds steady at 6.5% in October, economy adds 15,000 jobs

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OTTAWA – Canada’s unemployment rate held steady at 6.5 per cent last month as hiring remained weak across the economy.

Statistics Canada’s labour force survey on Friday said employment rose by a modest 15,000 jobs in October.

Business, building and support services saw the largest gain in employment.

Meanwhile, finance, insurance, real estate, rental and leasing experienced the largest decline.

Many economists see weakness in the job market continuing in the short term, before the Bank of Canada’s interest rate cuts spark a rebound in economic growth next year.

Despite ongoing softness in the labour market, however, strong wage growth has raged on in Canada. Average hourly wages in October grew 4.9 per cent from a year ago, reaching $35.76.

Friday’s report also shed some light on the financial health of households.

According to the agency, 28.8 per cent of Canadians aged 15 or older were living in a household that had difficulty meeting financial needs – like food and housing – in the previous four weeks.

That was down from 33.1 per cent in October 2023 and 35.5 per cent in October 2022, but still above the 20.4 per cent figure recorded in October 2020.

People living in a rented home were more likely to report difficulty meeting financial needs, with nearly four in 10 reporting that was the case.

That compares with just under a quarter of those living in an owned home by a household member.

Immigrants were also more likely to report facing financial strain last month, with about four out of 10 immigrants who landed in the last year doing so.

That compares with about three in 10 more established immigrants and one in four of people born in Canada.

This report by The Canadian Press was first published Nov. 8, 2024.

The Canadian Press. All rights reserved.

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Health-care spending expected to outpace economy and reach $372 billion in 2024: CIHI

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The Canadian Institute for Health Information says health-care spending in Canada is projected to reach a new high in 2024.

The annual report released Thursday says total health spending is expected to hit $372 billion, or $9,054 per Canadian.

CIHI’s national analysis predicts expenditures will rise by 5.7 per cent in 2024, compared to 4.5 per cent in 2023 and 1.7 per cent in 2022.

This year’s health spending is estimated to represent 12.4 per cent of Canada’s gross domestic product. Excluding two years of the pandemic, it would be the highest ratio in the country’s history.

While it’s not unusual for health expenditures to outpace economic growth, the report says this could be the case for the next several years due to Canada’s growing population and its aging demographic.

Canada’s per capita spending on health care in 2022 was among the highest in the world, but still less than countries such as the United States and Sweden.

The report notes that the Canadian dental and pharmacare plans could push health-care spending even further as more people who previously couldn’t afford these services start using them.

This report by The Canadian Press was first published Nov. 7, 2024.

Canadian Press health coverage receives support through a partnership with the Canadian Medical Association. CP is solely responsible for this content.

The Canadian Press. All rights reserved.

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Trump’s victory sparks concerns over ripple effect on Canadian economy

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As Canadians wake up to news that Donald Trump will return to the White House, the president-elect’s protectionist stance is casting a spotlight on what effect his second term will have on Canada-U.S. economic ties.

Some Canadian business leaders have expressed worry over Trump’s promise to introduce a universal 10 per cent tariff on all American imports.

A Canadian Chamber of Commerce report released last month suggested those tariffs would shrink the Canadian economy, resulting in around $30 billion per year in economic costs.

More than 77 per cent of Canadian exports go to the U.S.

Canada’s manufacturing sector faces the biggest risk should Trump push forward on imposing broad tariffs, said Canadian Manufacturers and Exporters president and CEO Dennis Darby. He said the sector is the “most trade-exposed” within Canada.

“It’s in the U.S.’s best interest, it’s in our best interest, but most importantly for consumers across North America, that we’re able to trade goods, materials, ingredients, as we have under the trade agreements,” Darby said in an interview.

“It’s a more complex or complicated outcome than it would have been with the Democrats, but we’ve had to deal with this before and we’re going to do our best to deal with it again.”

American economists have also warned Trump’s plan could cause inflation and possibly a recession, which could have ripple effects in Canada.

It’s consumers who will ultimately feel the burden of any inflationary effect caused by broad tariffs, said Darby.

“A tariff tends to raise costs, and it ultimately raises prices, so that’s something that we have to be prepared for,” he said.

“It could tilt production mandates. A tariff makes goods more expensive, but on the same token, it also will make inputs for the U.S. more expensive.”

A report last month by TD economist Marc Ercolao said research shows a full-scale implementation of Trump’s tariff plan could lead to a near-five per cent reduction in Canadian export volumes to the U.S. by early-2027, relative to current baseline forecasts.

Retaliation by Canada would also increase costs for domestic producers, and push import volumes lower in the process.

“Slowing import activity mitigates some of the negative net trade impact on total GDP enough to avoid a technical recession, but still produces a period of extended stagnation through 2025 and 2026,” Ercolao said.

Since the Canada-United States-Mexico Agreement came into effect in 2020, trade between Canada and the U.S. has surged by 46 per cent, according to the Toronto Region Board of Trade.

With that deal is up for review in 2026, Canadian Chamber of Commerce president and CEO Candace Laing said the Canadian government “must collaborate effectively with the Trump administration to preserve and strengthen our bilateral economic partnership.”

“With an impressive $3.6 billion in daily trade, Canada and the United States are each other’s closest international partners. The secure and efficient flow of goods and people across our border … remains essential for the economies of both countries,” she said in a statement.

“By resisting tariffs and trade barriers that will only raise prices and hurt consumers in both countries, Canada and the United States can strengthen resilient cross-border supply chains that enhance our shared economic security.”

This report by The Canadian Press was first published Nov. 6, 2024.

The Canadian Press. All rights reserved.

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