CORALS
CORALS
CORALS
3D-printed corals to create artificial reefs capable of accompanying the reintroduction of real corals into the environment. This equipment could accelerate researchers' understanding of these animals and create photoreactors.
The North-East Atlantic suffers from a lack of carbonates, which could seriously affect the development of cold-water coral colonies.
How does species recognition improve understanding of the ecology and evolution of mutualisms between reef-building corals and their mutualistic dinoflagellates (ie Symbiodiniaceae)?
Here are two articles in Nature on coral nutrition. How do corals supplement their diet with algae? How do corals cultivate symbionts and then feed on them?
There are many sympatric corals (different populations in the same area). The genetic inheritance of these corals leads them to react differently to ocean warming. A fact which makes their preservation more complex.
The polluting particles suspended in the Great Barrier Reef could ultimately be of "local" (and therefore marine) origin, rather than terrestrial. New protective measures would need to be put in place.
Recently dead Caribbean reef-building corals are undergoing rapid carbonate loss due to ocean acidification. This leads to colonization by parasitic species, preventing reefs from being rebuilt.
Corals are under threat all over the world. Action to preserve them is becoming increasingly urgent. Cryopreservation is a promising solution for safeguarding coral cuttings with a view to reintegrating them into the natural environment.
"This approach provides multi-species sustainable reference points for coral reef fisheries using environmental conditions, a promising way to improve the sustainability of coral reef fisheries worldwide".
Shallow-water corals are the most threatened by global warming and bleaching. A lowering of the thermocline also threatens mid-depth corals. Yet these corals are home to great biodiversity.
Doxycycline hydrochloride, used in aquaculture, has negative effects on the metabolism of soft corals: protein synthesis, photosynthesis, symbiotic association. These disturbances can lead to coral death or bleaching.
Corals host numerous organisms that facilitate their nutrition through photosynthesis. Bacterial exchanges between corals and with the external environment stimulate the growth of these host organisms (endosymbionts).
Filamentous viruses appear to be a major parasite on corals worldwide. This parasitism is thought to be mediated by symbiotic organisms hosted by corals. The scientists who wrote the article are concerned.
Hard coral productivity varies according to the number of surrounding benthic species (other hard corals, soft corals,macroalgaesponges...). This question the density of species when restockingsrepopulation.
Scleractinianscleractinianare key species in both shallow (warm) and deep (cold) ecosystems. Understanding their evolutionary history in the waters they have colonized is important to protect them from global warming.
Coral symbionts (which carry out photosynthesis) also associate with micro-organisms. In fact, their association with bacteria makes photosynthesis more efficient.
Through their actions, fish help corals to recover from environmental disturbances. However, this role is being increasingly undermined. The intensity of climatic accidents and anthropogenic pressures is taking over.
This study shows the advantages and limitations of hyperspectralhyperspectralto study coral reefs. Accuracy does not appear to be sufficient, but scientists are confident that it will improve rapidly with use.
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