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12 September 2017

Less snow from climate change pushes evolution of browner birds [ConservationBytes]

Climate changes exert selective pressures on the reproduction and survival of species. A study of tawny owls from Finland finds that the proportion of two colour morphs varies in response to the gradual decline of snowfall occurring in the boreal region.

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11 September 2017

Lazy ants make themselves useful in unexpected ways [Phys]

In a new paper, published in the open-access journal PLOS ONE, authors Charbonneau, Takao Sasaki of the University of Oxford and Dornhaus show for the first time that inactive ants can act as a reserve labor force. When they removed the top 20 percent of most active workers, they found that within a week, they were replaced mostly by individuals belonging to the "lazy" demographic, which stepped up and increased their activity levels to match those of the lost workers.

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8 September 2017

Bacterial ’aphrodisiac’ sends single-celled organism into mating frenzy [Nature]

Researchers surprised to observe bacterial protein triggering a switch from asexual to sexual behaviour.

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8 September 2017

Monarch butterflies disappearing from western North America [Phys]

Monarch butterfly populations from western North America have declined far more dramatically than was previously known and face a greater risk of extinction than eastern monarchs, according to a new study in the journal Biological Conservation.

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8 September 2017

Criquet pèlerin : une évolution du risque face au changement climatique [CIRAD]

Le criquet pèlerin est une espèce envahissante, très connue et redoutée pour les dégâts agricoles qu’elle peut causer à grande échelle. Cette espèce est particulièrement surveillée afin de prévenir les risques de pullulation et d’invasion. Les changements climatiques pourraient modifier l’aire de répartition du criquet pèlerin et constituer une nouvelle menace pour l’agriculture selon une étude publiée dans la revue Global Change Biology par des chercheurs du Cirad et de l’Inra.

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