What scientists learnt from analysing alien marine organisms that hitch-hike around the world on ships and other vessels that make their way into South African shores.
Introduced species that become invasive are clearly destructive, but many exotic species are not detrimental to the existing ecosystem – some become complementary or take on lost ecological roles.
While some invasive animals have breached Antarctica, the continent is still pristine. Our challenge is keeping it that way.
The effects of climate change are heightened in urban areas and impose a high financial burden to the municipalities.
THE CANADIAN PRESS/Nathan Denette
Shoreline communities are already faltering under the weight of billions of dollars in damages — and worrying that climate change will continue to make things even worse.
The diaphanous wings and striking markings of this parasitic wasp (Arotes decorus) belie its gruesome nature.
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Parasitic wasps are body-snatchers — if you’re an insect. But these much-maligned creatures have saved millions of human lives by controlling the spread of the cassava mealybug.
Many trees were still green in Maine’s Grafton Notch State Park on Oct. 1, 2021, when the area’s foliage is typically near peak color.
Cappi Thompson via Getty Images
Warm autumn weather has produced dull leaf colors across the eastern US this year, but climate change isn’t the only way that humans have altered trees’ fall displays.
Fall armyworm devouring a soybean leaf.
Scott D. Stewart
Biological control strategies curb pests using other species that attack the invader. A biologist explains why it can take more than a decade to develop an effective biological control program.
Lionfish are now invading the western Atlantic Ocean, from North Carolina to Brazil.
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The lionfish has few natural predators, and its venomous spines deter potential predators. But there may still be ways to naturally control the growth of this invader’s population.
Not all Australian native species belong in all Australian environments. In fact, many Australian plant species have become pests in places far from their original homes. Could some be in your garden?
Climate change is causing jacarandas to flower earlier. If this trend continues, they could be at risk of flowering when it’s too cold and become dormant.
Efforts to manage the invasive caterpillar L. dispar have cost billions of dollars in Canada and the United States.
(Chris MacQuarrie)
The caterpillar, Lymantria dispar, has eaten through 17,000 square kilometres of trees since the 1980s. The invasive insect was imported in the 1880s to launch a North American silk industry.
Whooping cranes were hunted extensively through the early 1900s, and by 1941, only 22 remained. They breed in Wood Buffalo National Park, in Alberta.
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A greater understanding of interconnectedness created by river maps could influence people to become more engaged with conserving river systems.
Wildfires are the inevitable consequence of three factors coming together at the same time: an ignition, the weather and fuel.
Brenton Geach/Gallo Images via Getty Images
The fynbos vegetation that historically clothed the slopes of Table Mountain is highly inflammable. This has been worsened by the spread of alien trees that burn more intensely than the fynbos.
Looking for bits of DNA at the University of Florida.
David Duffy
Matthew Flinders Professor of Global Ecology and Models Theme Leader for the ARC Centre of Excellence for Australian Biodiversity and Heritage, Flinders University