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30 octobre 2016

The fourth dimension of vegetation [Science / Perspective]

In July 1916, Swedish geologist Lennart von Post showed that by identifying and counting pollen preserved at different depths in Swedish peat bogs he could infer changes in forest composition through time (1–3). Following his pioneering work, pollen analysis quickly became established as a key tool for understanding past vegetation, climate, and ecosystems. Today, it is used widely to reconstruct past ecosystems and test hypotheses about drivers of ecosystem change.

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28 octobre 2016

Swifts break record by staying aloft for 10 months at a time [New Scientist]

We long suspected that they sleep and mate on the wing. Now, for the first time, there’s evidence that common swifts probably have to do both, because they spend an astonishing 10 months per year without landing – a world record for sustained flight in nature.

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28 octobre 2016

Le plus grand sanctuaire marin au monde va être créé en Antarctique [Le Monde - Planète]

Un accord obtenu vendredi en Australie va permettre la création d’une zone protégée dans la mer de Ross, dans le Pacifique.

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28 octobre 2016

Mutant plants reveal temperature sensor [Phys]

As we push the limits of agriculture to feed more people in a warmer world, we do not understand how plants sense temperature.
In a surprising turn of events scientists have just learned that plant light sensors also respond to temperature.

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28 octobre 2016

Fish Turn on Genes to Adapt to Climate Change [Scientific American]

Skate fish off Canadian coast use epigenetics to survive in warmer water

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