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erosion-au-chili

Chile: a history of erosion

Chile is an ideal study site for geologists, due to its exceptional climate gradient. Over the past few hundred years, climate but also human activities have severely impacted soils in this country.

The effects of gold mining in rivers in French Guiana

A study conducted in the French Guiana basin where artisanal gold mining in occurs has shown there is mercury in the environment from these activities. It is even found in the piscivorous fish and indigenous communities that eat food from the rivers affected. These are important and innovative...
Large-scale hydroelectric dams on Andean rivers disrupt river connectivity to the Amazon.

Andean dams versus Amazonian biodiversity

A recent scientific study warns of the multiplication of large-scale hydroelectric dams on the Andean tributaries of the Amazon. These installations break up watercourses and pose a threat to the biodiversity and hydrological regime of the entire basin.
aedes-albopictus

The Asian tiger mosquito enjoys car journeys

Original research shows the role of car journeys in the spread of the Asian tiger mosquito in Europe. Accustomed to freight transportation, this invasive species also uses passenger vehicles to propagate. It is seemingly found in 5 out of 1,000 cars.
test-arsenic

The Uros of Bolivia, adept at neutralising arsenic

A study of women from various Bolivian communities shows that these peoples drink water containing elevated levels of arsenic on a daily basis. While the toxic effects of the regular ingestion of this substance are well known, these women’s bodies seem particularly adept at “neutralising” the poison...
trois-jeunes-indiennes-vues-de-dos

How the world deals with abortion

Voluntary termination of pregnancy is the subject of ideological debate as well as health policies. Demographer Agnès Guillaume, co-author with Clémentine Rossier of an extensive review of the subject*, sheds light on the right, access to and practice of abortion in the world today.
black-bass

Biodiversity of freshwater fish in turmoil

In the last few centuries, 15% of new fish species have been introduced by Man into rivers across the world. Researchers have found that these introductions alter the ecosystem to a much larger extent than originally anticipated.
barge-d-orpaillage-sur-le-maroni

The Maroni River threatened by gold mines

How have the environmental changes that have occurred in recent decades in French Guiana, including gold extraction in the hinterland, affected the Maroni River? A team involving IRD researchers analysed changes in sediment flows in this water course since 2000. Their findings are alarming.
hbv-institut-pasteur

Liver cancer: the Peruvian exception

Scientists and physicians are attempting to decipher the ins and outs of the atypical epidemiology of liver cancer in Peru, where young people are particularly affected by the disease. Their research highlights risk factors which were hitherto unknown.

Cultivating land for carbon

Soils from cultivated areas in tropical regions constitute largely underused carbon sinks. Increasing carbon stocks in soil has become critical to mitigate the effects of climate change but also increase soil fertility. What are the options?