Biodiversity is great in theory, but there are reasons to fend off invasive alien species and the knock-on effect of their presence
Britain would be a wasteland if it weren’t for immigration. Fifteen thousand years ago, most of the country was buried a kilometre deep in ice – not ideal conditions for life. That all changed as we moved out of the last ice age into the current, milder climate phase. The ice sheets retreated, leaving an empty landscape for anything with the wherewithal to seize the opportunity and move in. Tens of thousands of species did, mainly heading north from the European continent to which Britain was then joined. The result was a native biota where almost every species is an immigrant. Our ancestors were among them.
Immigration is a natural process, but it’s one that has been fundamentally changed thanks to humanity’s wanderlust. As we’ve moved around the world we have taken many other species along with us – some deliberately, some accidentally – to areas they couldn’t have reached without our assistance. These include many of the most familiar denizens of the British countryside. Grey squirrel, ring-necked parakeet, horse chestnut, rhododendron – none of these would be in Britain if they hadn’t been brought by people. They are what ecologists call aliens. Anywhere people live you’ll also find aliens.
Tim Blackburn is professor of invasion biology at University College London and author of The Jewel Box: How Moths Illuminate Nature’s Hidden Rules
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Breaking Waves: Ocean News
03/10/2025 - 06:00
03/10/2025 - 05:48
Rainfall in Bahía Blanca led to 10 deaths, swept away vehicles, destroyed bridges and left areas underwater
The city of Bahía Blanca in Argentina had a new rainfall record on Friday, after a recent heatwave. More than 400mm (15.7in) of rain was recorded in just eight hours, more than twice the city’s previous record of 175mm set in 1930, and roughly equivalent to a year’s worth of rainfall.
The heatwave primed the atmosphere for heavy rainfall by creating high instability and raising humidity levels. Then on Friday, as a cold front swept across the region, this warm moist air was able to rise, cool and rapidly condense, leading to severe thunderstorms across the region. As the front then continued northwards towards Buenos Aires over the weekend, further severe storms were triggered, containing heavy rain, hail and strong gusts.
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03/10/2025 - 05:00
Pfas are poisoning our soil and polluting our lungs. The EPA is finally sounding the alarm – but that’s not enough
Several years ago, I made a movie called Dark Waters, which told the real-life story of a community in West Virginia poisoned by Pfas “forever chemicals”. DuPont – a chemical manufacturing plant – contaminated the local water supply, killing cows and wildlife, making its workers sick and exposing local residents to toxic chemicals. It was an environmental horror story.
It’s still happening across the country.
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03/10/2025 - 05:00
Two Italian cacti smugglers have been fined for illegally trading plants from Chile – and for the cost of restoring the environment. Conservationists hope more cases will follow
Chile’s Atacama desert is one of the driest places on Earth, a surprisingly cool environment, sucked clean of moisture by the cold ocean to the west. This arid, golden landscape is home to many rare species of cacti, which attract professional and amateur botanists from around the world keen to make discoveries and experience the thrill of naming a new species.
But they are not the only ones prowling the sands: Atacama has become a hotspot for succulent smuggling.
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03/10/2025 - 00:33
The toxic Tasmanian salmon industry has gone too far this time
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03/09/2025 - 21:04
Chris Minns stresses that the New South Wales evacuation centres set up for people fleeing flooding will be closed once the immediate threat from ex-Tropical Cyclone Alfred is over. The premier says his government contributed $5bn for social housing in its last budget. 'Evacuation centres are not going to be long-term solutions for homelessness on the northern rivers,' he says. 'And I just want to be really transparent and clear … They can’t operate longer than they were intended to'
Ex-Tropical Cyclone Alfred update: residents warned to head for high ground as flood waters rise
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03/09/2025 - 17:30
Environment secretary points to measures to stop lake being ‘choked by unacceptable levels’ of pollution
The government has said it will “clean up Windermere” after criticism over the volume of sewage being pumped into England’s largest lake.
The environment secretary, Steve Reed, pledged “only rainwater” would enter the famous body of water in the Lake District, putting an end to the situation where it Windermere was being “choked by unacceptable levels of sewage pollution”.
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03/09/2025 - 16:29
Bureau urged to review its systems after Fraser Coast mayor says Hervey Bay was pelted with 260mm of rain after being told it was not in firing line
Ex-Cyclone Alfred LIVE: latest news and updates
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The Bureau of Meteorology has defended its forecasting against criticism it failed to give the coastal Queensland community of Harvey Bay enough notice of a torrential downpour in the aftermath of Tropical Cyclone Alfred.
The Fraser Coast mayor, George Seymour, said the bureau should review its systems, claiming the area was not adequately warned before it was pelted with more than 260mm of rain in a few hours on Sunday, sparking an emergency situation and about a dozen rescues.
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03/09/2025 - 16:23
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There is a rescue under way in Newmarket Road, Windsor, where cars have tried to drive through flood waters.
The Queensland government has stressed to use common sense, adjust speeds and not drive through flood waters. There has been some heavy rainfall overnight and the roads are dangerous.
We’ve been working on a budget now, in the normal course, and budget submissions have been presented to the expenditure review committee. I sit on that.
And so we’ve been very busy in over the last few months, really, and particularly over the last few weeks, in the lead-up to the budget.
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03/09/2025 - 07:00
Damage to trees in western North Carolina from Hurricane Helene was ‘extraordinary and humbling’ but urban areas face particular problems
The city of Asheville and its surrounding areas have been left vulnerable to floods, fires and extreme heat after Hurricane Helene uprooted thousands of trees that provided shade and protection from storms.
Helene was catastrophic for the region’s trees – in part due to the heavy precursor rainstorm that pounded southern Appalachia for two days straight, drenching the soil before Helene hit, bringing yet more heavy rain and 60-100mph winds.
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