Classe
vivant

How Environmental Changes are Causing New Diseases to Emerge?

In the ocean, near a sandy bottom, a good-sized coelacanth faces a diver.

The new coelacanth has arrived?

Indonesian and French scientists have identified what they believe to be a new species of coelacanth, shedding light on the biogeographical mechanisms at the origin of the divergence between the populations known to date. The history of the evolution of this group of fish, little changed in...
Petites maisons colorées sur un bout de terre entourée de mer

Islands and island environments faced with global changes

Openness to the outside world, incorporation within the global economy but also the growth in natural risks and rising sea levels.... With their unique characteristics, often under threat, island environments and communities are today faced with unprecedented destabilising factors.
Etude des fonds coralliens en Nouvelle-Calédonie, dans le cadre du projet PRISTINE, 2013.

Effectiveness of marine reserves compromised by proximity to humans

The environmental benefits of marine reserves located near human populations are limited. This was demonstrated by researchers from the University of Montpellier, IRD and the University of New Caledonia, in conjunction with CNRS, as they studied 1,800 coral reefs, 106 of which were located in 20...

The effects of gold mining in rivers in French Guiana

A study conducted in the French Guiana basin where artisanal gold mining in occurs has shown there is mercury in the environment from these activities. It is even found in the piscivorous fish and indigenous communities that eat food from the rivers affected. These are important and innovative...
The fruit clusters of Coccoloba uvifera give it its nickname of sea grape.

Unwavering symbiosis

Research conducted on the introduction of a tree from extreme environments into the sand dunes of Senegal shows its solid relationship with a fungus. This fungus naturally accompanies the tree from its environment of origin, on the other side of the Atlantic.
Root nodules of Discaria (Order: Rosales), a non-legume species capable of nitrogen-fixing symbiosis.

Nitrogen-fixing symbioses reveal themselves

Recent research has revealed the origin and evolution of symbiotic relationships between certain plants and soil bacteria in order to use atmospheric nitrogen. This knowledge could ultimately contribute to the development of sustainable agriculture minimising the use of chemical fertilisers.
recif-moorea-2018

The resistance of the Moorea corals

Experts in ocean ecology are investigating the health of coral reefs, put to the test by the increase in natural and anthropogenic disturbances. While there is growing concern about their overall future, certain reefs resist repeated attack, but however lose their diversity.

Amazon groundwater quantified at last!

As the Amazon basin is difficult to access, the condition of its water table remained virtually unknown. The mystery was solved thanks to an assessment made by an international team linked to several IRD units and led by LEGOS researchers. This result is all the more interesting in that access to...

Mercury levels in tuna: Verifying the size, species, and origin!

Tuna is a widely-loved food around the world, but it can harbour a toxin: methylmercury. According to a recent study, the levels of this toxin in Central and Southwest Pacific tuna depends not only on the size and species of the fish, but also their geographic origin. These results are crucial for...