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7 septembre 2017

Due to climate change, one-third of animal parasites may be extinct by 2070 [Phys]

The Earth’s changing climate could cause the extinction of up to a third of its parasite species by 2070, according to a global analysis reported Sept. 6 in the journal Science Advances. Parasite loss could dramatically disrupt ecosystems, and the new study suggests that they are one of the most threatened groups of life on Earth.

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7 septembre 2017

Amborella, rescapée des changements climatiques du passé [IRD]

Des recherches sur la descendante directe de la première plante à fleurs révèlent son extraordinaire histoire évolutive. Elle a réchappé aux changements climatiques du passé, et elle constitue un modèle sur la réponse du vivant face aux bouleversements environnementaux.

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5 septembre 2017

Weird fish fossil changes the story of how we moved onto land [New Scientist]

The evolutionary story we have written to explain our ancestors’ move from sea to land may need a rethink. A fossil fish from this era has been discovered with several of the features of land animals – yet it was only distantly related to them.

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4 septembre 2017

Birds choose mates with ornamental traits [Phys]

A recurring theme in nature documentaries is that of choosy females selecting brightly colored males. A new study shows that, in monogamous mating systems, male birds may select their lifelong mates in much the same way.

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4 septembre 2017

We may finally understand why tropical plants have huge leaves [New Scientist]

To solve this puzzle, Ian Wright at Macquarie University in Sydney and his colleagues studied the leaves of 7670 plant species found at different latitudes. The team looked at the relationship between leaf size and various aspects of climate, including day and night temperatures, rainfall and humidity.

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