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Jérôme OLLIER

DNA Barcoding of Scavenging Amphipod Communities at Active and Inactive Hydrothermal Ve... - 0 views

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    Hydrothermal vent areas have drawn increasing interest since they were discovered in 1977. Because of chemoautotrophic bacteria, they possess high abundances of vent endemic species as well as many non-vent species around the fields. During the survey conducted by the Bundesanstalt für Geowissenschaften und Rohstoffe (Federal Institute for Geosciences and Natural Resources, BGR) to identify inactive polymetallic sulfide deposits along Central and Southeast Indian Ridges, the INDEX project studied the scavenging amphipod community at three newly discovered hydrothermal fields. A sample consisting of 463 representatives of Amphipoda (Malacostraca: Crustacea) was collected by means of baited traps in active and inactive vents of three different sites and subsequently studied by both morphological and genetic methods. Molecular methods included the analysis of two mitochondrial (cytochrome c oxidase subunit I [COI] and 16S rRNA) and one nuclear (18S rRNA) genes. By six delimitation methods, 22 molecular operational taxonomic units (MOTUs) belonging to 12 genera and 10 families were defined. The existence of potential species complexes was noted for the representatives of the genus Paralicella. The inactive site, where 19 species were found, showed higher species richness than did the active one, where only 10 taxa were recorded. Seven genera, Ambasiopsis, Cleonardo, Eurythenes, Parandania, Pseudonesimus, Tectovalopsis, and Valettiopsis, were observed only at inactive sites, whereas Haptocallisoma, was collected exclusively at active ones. The species Abyssorchomene distinctus (BIRSTEIN and VINOGRADOV, 1960), Hirondellea brevicaudata Chevreux, 1910, and Hirondellea guyoti (BARNARD and INGRAM, 1990), have been previously reported from vent sites in the Atlantic or Pacific oceans. The present study provides the first report of Eurythenes magellanicus (H. Milne Edwards, 1848) and five other already described species in the Indian Ocean. The addition of 356 sequences strong
Jérôme OLLIER

Back-to-back heatwaves kill more than two-thirds of coral - @BangorUni - 0 views

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    Study shows severe loss of central Indian Ocean coral reefs between 2015 and 2017.
Jérôme OLLIER

Back-to-back heatwaves kill more than two-thirds of coral - @ZSLScience - 0 views

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    Study shows dramatic loss of central Indian Ocean coral reefs between 2015 and 2017.
Jérôme OLLIER

Another unprecedented tropical cyclone hits Mozambique - @WMO - 0 views

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    A few weeks after IDAI which wreaked havoc on central Mozambique (and eastern Zimbabwe), the country is dealing with another unprecedented event. Tropical Cyclone Kenneth made landfall in northern Mozambique on 25 April, near the border with Tanzania, in an area where no tropical cyclone has been observed since the satellite era. There is no record of two storms of such intensity striking Mozambique in the same season. It has now weakened into a depression.
Jérôme OLLIER

Via @ZeHub - Climat : record en vue pour 2015 - @libe - 0 views

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    Climat : record en vue pour 2015.
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    Climat : record en vue pour 2015.
Jérôme OLLIER

Violent passions -- jealous cleaner shrimp murder their rivals - BioMed Central via Eur... - 0 views

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    Violent passions -- jealous cleaner shrimp murder their rivals.
Jérôme OLLIER

Pirates seize Maltese carrier with Iranian, Indian crew: EU - AFP - 0 views

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    Pirates seize Maltese carrier with Iranian, Indian crew: EU.
Jérôme OLLIER

Somali pirates hijack ship with 23 crew members - AP - 0 views

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    Somali pirates hijack ship with 23 crew members.
Jérôme OLLIER

Danish crew free Somali pirate hostages - AFP - 0 views

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    Danish crew free Somali pirate hostages.
Jérôme OLLIER

Danes free 18 hostages held by Somali pirates - AP - 0 views

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    Danes free 18 hostages held by Somali pirates.
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