Plummeting insect numbers 'threaten collapse of nature'

Exclusive: Insects could vanish within a century at current rate of decline, says global review

Damian Carrington Environment editor

Sun 10 Feb 2019 18.00 GMTLast modified on Mon 11 Feb 2019 01.00 GMT

The world’s insects are hurtling down the path to extinction, threatening a “catastrophic collapse of nature’s ecosystems”, according to the first global scientific review.

More than 40% of insect species are declining and a third are endangered, the analysis found. The rate of extinction is eight times faster than that of mammals, birds and reptiles. The total mass of insects is falling by a precipitous 2.5% a year, according to the best data available, suggesting they could vanish within a century.

The planet is at the start of a sixth mass extinction in its history, with huge losses already reported in larger animals that are easier to study. But insects are by far the most varied and abundant animals, outweighing humanity by 17 times. They are “essential” for the proper functioning of all ecosystems, the researchers say, as food for other creatures, pollinators and recyclers of nutrients.

Insect population collapses have recently been reported in Germany and Puerto Rico, but the review strongly indicates the crisis is global. The researchers set out their conclusions in unusually forceful terms for a peer-reviewed scientific paper: “The [insect] trends confirm that the sixth major extinction event is profoundly impacting [on] life forms on our planet.

“Unless we change our ways of producing food, insects as a whole will go down the path of extinction in a few decades,” they write. “The repercussions this will have for the planet’s ecosystems are catastrophic to say the least.”

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Inuit fear they will be overwhelmed as ‘extinction tourism’ descends on Arctic

Visit of giant cruise ship will bring money and tourists to the Northwest Passage, but fears grow for the area’s people and its ecosystem

Robin McKie Observer science editor

Sunday 21 August 201600.05 BST

In a few days, one of the world’s largest cruise ships, the Crystal Serenity, will visit the tiny Inuit village of Ulukhaktok in northern Canada. Hundreds of passengers will be ferried to the little community, more than doubling its population of around 400. The Serenity will then raise anchor and head through the Northwest Passage to visit several more Inuit settlements before sailing to Greenland and finally New York.

It will be a massive undertaking, representing an almost tenfold increase in passenger numbers taken through the Arctic on a single vessel – and it has triggered considerable controversy among Arctic experts. Inuit leaders fear that visits by giant cruise ships could overwhelm fragile communities, while others warn that the Arctic ecosystem, already suffering the effects of global warming, could be seriously damaged.

“This is extinction tourism,” said international law expert Professor Michael Byers, of the University of British Columbia. “Making this trip has only become possible because carbon emissions have so warmed the atmosphere that Arctic sea ice in summer is disappearing. The terrible irony is that this ship – which even has a helicopter for sightseeing and a huge staff-to-passenger ratio – has an enormous carbon footprint that is only going to make things even worse in the Arctic.”

The Serenity is by far the biggest cruise vessel to traverse the fabled Northwest Passage, whose exploration has claimed the lives of hundreds of seamen. The ship has a crew of 655 and carries 1,070 passengers, who have paid between £19,000 and £120,000 for a voyage that Crystal Cruises says will take them on an “intrepid adventure” from Anchorage in Alaska to New York over 32 days.

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Northern invaders threaten Antarctic marine life

Date: May 24, 2016

Source: Australian National University

An international study led by The Australian National University (ANU) has found evidence that marine life can easily invade Antarctic waters from the north, and could be poised to colonise the rapidly-warming Antarctic marine ecosystems.

The Antarctic Polar Front, a strong ocean front formed where cold Antarctic water meets warmer waters to the north, has historically been seen as a barrier preventing movement of marine life.

But the study has found the Antarctic Polar Front is often crossed by floating kelp that can form rafts carrying crustaceans, worms, snails and other seaweeds across hundreds of kilometres of open ocean.

"So far, the northern species don't seem to be surviving long in the cold, icy Antarctic. But with climate change and warming oceans, many non-Antarctic species could soon colonise the region," said lead researcher Dr Ceridwen Fraser, from the ANU Fenner School of Environment and Society.

"We now know marine species from the north can easily get into Antarctic waters. The Antarctic is one of the world's fastest warming regions, and the consequences of new species establishing there could lead to drastic ecosystem changes," Dr Fraser said.

The evidence was collected by surveys of floating kelp. On three different ship voyages in 2008, 2013 and 2014, researchers counted drifting seaweed species in both sub-Antarctic and Antarctic water.

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Japan: Snapping turtles menace farmers and residents

5 August 2014 Last updated at 10:52

Japan is reportedly facing a surge in its population of snapping turtles - threatening some of the country's fragile ecosystems as well as its people's fingers.

Snapping turtles originally come from the Americas, but turned up in Japan as pets in the 1960s, Kyodo news agency reports. Some turtles must have escaped to the wild, as there were an estimated 1,000 turtles roaming the Chiba Prefecture 10 years ago. The turtles have been classed in Japan as an invasive species and are eating up fish, bird and weed stocks, and chewing their way through fishermen's nets.

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