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29 janvier 2018

Mosquitoes remember human smells, but also swats, researchers find [Phys]

The study, published Jan. 25 in the journal Current Biology, shows that mosquitoes can rapidly learn and remember the smells of hosts and that dopamine is a key mediator of this process. Mosquitoes use this information and incorporate it with other stimuli to develop preferences for a particular vertebrate host species, and, within that population, certain individuals.

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26 janvier 2018

Les coraux, malades du plastique [Le Monde - Planète]

Les déchets polluant les océans multiplient par vingt les risques de pathologies pour les récifs, selon une étude internationale.

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26 janvier 2018

How are river ecosystems affected by regulation ? [The Freshwater Blog]

Natural variations in water flow are important for many reasons. One is that they can ‘clean’ the river bottom. Although this can be devastating for the organisms which are ripped off by a flood, or killed by a drought, such ‘cleaning’ creates open spaces for colonisation by other organisms. Disturbance by floods and droughts is – in the long run – important for maintaining biodiversity in rivers.

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26 janvier 2018

Think of honeybees as ’livestock,’ not wildlife, argue experts [Phys]

The ’die-off’ events occurring in honeybee colonies that are bred and farmed like livestock must not be confused with the conservation crisis of dramatic declines in thousands of wild pollinator species, say Cambridge researchers.
Writing in the journal Science, the conservationists argue there is a "lack of distinction" in public understanding - fuelled by misguided charity campaigns and media reports - between an agricultural problem and an urgent biodiversity issue.

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25 janvier 2018

Decoding the Axolotl genome [Phys]

A team of researchers led by scientists in Vienna, Dresden and Heidelberg has decoded the entire genetic information of the Mexican salamander axolotl. The axolotl genome, which is the largest genome ever to be sequenced, will be a powerful tool to study the molecular basis for regrowing limbs and other forms of regeneration.

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