In the northern Red Sea and Gulf of Aqaba, corals have exceptionally high tolerance to increasing seawater temperatures resulting from global warming. However, climate change will also result in more variable weather patterns, including extreme cold periods. Researchers now demonstrate that a winter even 1°C cooler than average results in a physiological stress response similar to that seen in other corals under heat stress, detailing how perilously close they live to their lower temperature threshold.
Atlantic bluefin tuna have returned to UK waters and can once again be seen during the summer and autumn months.
The downward trajectory of plant and animal diversity constitutes a key issue of the Anthropocene. Whether diversity is changing also in the world of microbes is unknown, however -- a "profound ignorance" -- because the importance of these microorganisms maintain Earth's habitability. A paper published today frames the rate of change of microbial biodiversity as an important question on which progress is possible.
Heat stress disrupts the physiological processes of corals prior to clear signs of bleaching, with implications for adaptation strategies for coral reefs in a warming climate.
Collaborative research of the University of Jyväskylä and Natural Research Institute Finland presents new evidence of the effects of enriched rearing on well-being of aquaculture fishes. The research demonstrates that stone enrichments that have been previously conditioned in lake water significantly improve survival of fish compared to clean stones. Also a higher number of stones has a similar positive effect. The results have practical implications for prevention of aquaculture diseases. The study was published in Antibiotics in March 2021.
The first photosynthetic oxygen-producing organisms on Earth were cyanobacteria. Their evolution dramatically changed the Earth allowing oxygen to accumulate into the atmosphere for the first time and further allowing the evolution of oxygen-utilizing organisms including eukaryotes. Eukaryotes include animals, but also algae, a broad group of photosynthetic oxygen-producing organisms that now dominate photosynthesis in the modern oceans. When, however, did algae begin to occupy marine ecosystems and compete with cyanobacteria as important phototrophic organisms?
Researchers conducted the first large-scale survey of the microbiota present in the seamount's ferromanganese crusts, describing bacteria and archaea involved in the nutrient cycle and formation of metals. Brazil has mineral exploration rights to the Rise, but mining there will have a major environmental impact.
Even the mention of parasites can be enough to make some people's skin crawl. But to recent UC Santa Barbara doctoral graduate Dana Morton these creepy critters occupy important ecological niches, fulfilling roles that, in her opinion, have too often been overlooked.
A recent study revealed that to better conserve the giant trevally, an economically important game fish in the Seychelles, its nursery areas should be protected, as well as the bigger areas the large adults of the species frequently use. The study praises the Seychelles Marine Protected Areas and advises that St Joseph Atoll, the nursery area in the study, should not allow extractive fishing for species like giant trevally.
Coral reefs provide many services to coastal communities, including critical protection from flood damage. A new study led by researchers at the University of California, Santa Cruz, and the US Geological Survey reveals how valuable coral reefs are in protecting people, structures, and economic activity in the United States from coastal flooding during storms.