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Planting Abies religiosa (Sacred fir) seedlings under the shade of pre-existing shrubs (Senecio cinerarioides, narrow green-greyish foliage) as protective “nurse plants”. Large trees on background are adult Pinus hartwegii, the pine that reaches the timberline. Abies religiosa is completely absent in this site at 3800 meters of elevation, northeaster slope of Nevado de Toluca volcano, central Mexico, because it is too high in elevation. Planters personnel are locals of Native Indian origin. Image credit: Cuauhtémoc Sáenz-Romero, UMSNH

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Published on 18 Oct 2024

Scientists create new overwintering sites for monarch butterflies on a warming planet

Migrating monarch butterflies depend on mountain forests of sacred firs in Mexico as overwintering sites. These forests are under threat from global warming. But researchers from Mexico have now shown that seedlings derived from their original range can be transplanted successfully to a new site further east, on the higher and colder volcano Nevado de Toluca. The resulting new stand of sacred firs could ultimately serve as the overwintering sites of the future.

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Planting Abies religiosa (Sacred fir) seedlings under the shade of pre-existing shrubs (Senecio cinerarioides, narrow green-greyish foliage) as protective “nurse plants”. Large trees on background are adult Pinus hartwegii, the pine that reaches the timberline. Abies religiosa is completely absent in this site at 3800 meters of elevation, northeaster slope of Nevado de Toluca volcano, central Mexico, because it is too high in elevation. Planters personnel are locals of Native Indian origin. Image credit: Cuauhtémoc Sáenz-Romero, UMSNH

Life sciences

Published on 18 Oct 2024

Scientists create new overwintering sites for monarch butterflies on a warming planet

Migrating monarch butterflies depend on mountain forests of sacred firs in Mexico as overwintering sites. These forests are under threat from global warming. But researchers from Mexico have now shown that seedlings derived from their original range can be transplanted successfully to a new site further east, on the higher and colder volcano Nevado de Toluca. The resulting new stand of sacred firs could ultimately serve as the overwintering sites of the future.

Photo credit: Georgina Catacora-Vargas

Frontiers news

Published on 11 Oct 2024

Georgina Catacora-Vargas - Securing our food: Women scientists and the pursuit of food security in the Global South

Dr Georgina Catacora-Vargas is a professor of agroecology at the Academic Peasant Unit "Tiahuanacu" of the Bolivian Catholic University; president of the Latin American Scientific Society of Agroecology (SOCLA), advisor for Agroecology Fund; and research associate at AGRUCO, Faculty of Agricultural and Livestock Sciences at the University Mayor de San Simón (Bolivia), with decades of experience in agriculture, agroecology, and policymaking. She is also a member at the IPES-Food think tank and the Ad Hoc Expert Technical Group on Farmers Rights under the International Treaty of Plant Genetic Resources for Food and Agriculture of the United Nations Organization on Food and Agriculture. Previously, Dr Catacora-Vargas worked at the Ministry of Environment and Water in Bolivia as chief of the Forest Management and Development Unit and advisor of the National Competent Environment Authority. In honor of World Food Day and in line with the UN Sustainable Development Goal 2: Zero Hunger, Dr Catacora-Vargas took the time to sit down with us and discuss her journey in agroecology.

Image credit: Direct_Media/iStock

Featured news

Published on 01 Oct 2024

‘Cheeky’ discovery allows scientists to estimate your risk of dying using cells found in the mouth

Over the past decade, several epigenetic clocks have been developed to track physiological aging. Until recently, all had been based on the DNA methylome of blood cells – onerous and stressful to collect. But now, scientists from the US have shown for the first time that their new epigenetic clock CheekAge, which uses easy-to-collect cheek cells, can accurately predict mortality. This suggests that cheek swabs could be an improved way to measure and predict healthy vs unhealthy aging and mortality in humans.

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