The environmental impacts caused by invasive alien species are more severe in poor countries of Global South than wealthy countries of Global North, a new study finds. The study shatters a long-standing assumption that wealthier Global North countries suffer the worst effects of invasive alien species (IAS) and highlights weak governance and insufficient management capacity as some of the reasons for greater severity of impacts in the Global South. The study published in Science in July employed a method involving the assessment of the average impact of severity, which uses a different approach from previous research. Instead of focusing on numbers of invasive species, this method focuses on how serious the level of impacts caused by invasive species are. Previously, impacts of IAS have been regarded more of a problem in the Global North because fewer large impacts were reported from the Global South, Sven Bacher, professor of ecology at University of Fribourg and the lead author of the research, told Mongabay by email. “We show that this is due to uneven reporting, and that the average impacts are actually higher in the GS [Global South]. This even holds for impacts of the same IAS introduced to both the GS and the GN [Global North]: on average their impacts are larger in the GS,” he said. Among the paper’s key findings, the scientists identified weak governance and limited management capacities as two major factors contributing to the Global South’s greater vulnerability. Some of the impacts of IAS can include damage…This article was originally published on Mongabay

For decades, the global outlook for food and agriculture has brought heightened concerns  as climate patterns create a mix of droughts and floods across the world. Consequently, fears of diminishing crop yields and livestock shortages have dominated the headlines. Amid the ensuing food security crisis, scientists are wondering if communities can turn toward local plant diversity as insurance against subsequent food shocks. A recent study published in People and Nature examines how pastoralist communities in a Ugandan subregion contend with food shortages by adopting previously unused wild edible plants. The study comes on the heels of 2024 research on wild edible plants by local NGOs in Karamoja, a semiarid region in northern Uganda. That earlier study found “that people had developed uses for plants they had not used before,” Emiel De Meyer, a postdoctoral researcher at the State Natural History Museum in Germany, explained by email. Spurred by this discovery, De Meyer led a team of researchers across five agro-pastorialist communities in Karamoja, interviewing members of the local communities on their knowledge of edible wild plants. Through a mix of qualitative and statistical methods, the researchers also probed the reasons behind the adoption of particular plants and how this knowledge was transmitted. In the five villages covered in the study, the authors recorded 27 plant species previously unused as food and now eaten as leafy vegetables. Of these, 20 were reported to be indigenous to Uganda. Although all these plants were mostly harvested during the wet season, at least three…This article was originally published on Mongabay

MALALA DRIFT, South Africa — In Malala Drift, near the town of Musina in South Africa’s Limpopo province, drought and unreliable access to water are threatening the livelihoods of farmers. Some have abandoned crop production after struggling to secure enough water, while others continue farming under increasingly difficult conditions. The farms lie along the Limpopo River, which separates South Africa from Zimbabwe. But even with a major river nearby, access to reliable water supply is not guaranteed. Farmers say rainfall has become increasingly unpredictable in the past decade, and when the river level falls, they sometimes pay an excavation company to dig into the riverbed to reach water, adding to the cost of keeping their farms operating. The effects of the water scarcity are visible at one of the farms Mongabay visits. Poles that once supported tomato plants are scattered across the property, while irrigation pipes are obscured by overgrown grass. No crops are growing. Kanny Ndou, who used to work here as a laborer and now takes care of the property, said the farm previously produced potatoes, butternut squash and tomatoes for sale in Musina. But after 10 years, Ndou said, the owner stopped farming in 2025 because of unreliable water supply. “We used to grow a variety of vegetables for sale in Musina, but due to inconsistent water supply, the farm decided to stop farming last year,” he said. For years, farmers had faced unpredictable outcomes: a good harvest one season, a bad one the next, he said. Some…This article was originally published on Mongabay