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9 novembre 2016

Without birds, tropical forests won’t bounce back from deforestation [Phys]

Among its many other claims to fame, the Amazon rainforest contains more than 1,500 bird species. Around a quarter of them are found nowhere else on Earth. Many of these birds have evolved to fill a specific role – whether that means eating particular types of insects, or scattering a certain size of seed, they all play a part in one of the world’s most complex ecological networks, keeping the forest healthy and resilient. More than 90% of tropical trees and shrubs depend on animals to disperse their seeds, for example. These "biodiversity services" are crucial.

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9 novembre 2016

La France concentre 10 % de la biodiversité mondiale [Notre-Planete]

Chaque année, le Muséum national d’Histoire naturelle publie la liste des espèces décrites et recensées sur l’ensemble du territoire national (y compris l’outre-mer) : le référentiel taxonomique national ou TAXREF[1]. 182 498 espèces de faune et de flore, terrestres et marines, ont ainsi été inventoriées en 2016. En comparaison des estimations scientifiques comptant deux millions d’espèces décrites dans le monde[2], cela représente près d’une espèce sur dix sur la planète.

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8 novembre 2016

Team discovers three new bird species in Africa [Phys]

Texas A&M University team has discovered three never before documented bird species, and there could well be more, the team’s leader said.

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8 novembre 2016

Southern hemisphere faster to recover after killer asteroid, study suggests [The Guardian]

Analysis of insect damage to fossil leaves presents new theory as to why southern hemisphere recovered faster from asteroid that killed the dinosaurs.

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7 novembre 2016

Birds are more like ‘feathered apes’ than ‘bird brains’ [The Guardian]

For centuries scientists dismissed birds as dumb based on physical differences in their brains. How wrong we were.

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