Géosciences Environnement Toulouse

Marine arsenate evolution during Proterozoic oxygenation events and implications for biological phosphate metabolism

Abstract Earth’s atmosphere and oceans experienced two major episodes of ocean-atmosphere oxygenation that transformed the planet and shaped the evolution of the oxygen-rich biosphere between 2.45 and 0.541 billion years ago (Ga). These changes increased the abundance of oxidized...

Calcium Isotopic Composition in Reindeer ( Rangifer tarandus ) Bones and Tooth Enamel: A Scalable Tool to Quantify Nursing Frequency in Past and Modern Populations?

RATIONALE: Populations of North American caribou and Eurasian reindeer (Rangifer tarandus sspp.), essential for Arctic ecosystems and human communities, are experiencing unprecedented declines due to climate change and anthropogenic pressures. While understanding their historical...

Rocks out, waste in: A double penalty in gravel-rich river valleys?

Construction and Demolition (C&D) waste is the largest solid waste stream in France, yet circular economy (CE) research on this sector tends to privilege technical and quantitative framings over its socio-economic and governance dimensions. This article examines the implementatio...