Scientists used DNA metabarcoding to show for the first time that jellyfish are an important food for amphipods during the Arctic polar night in waters off Svalbard, at a time of year when other food resources are scarce. Amphipods were not only observed to feast on ‘jelly-falls’ of dead jellyfish, but also to prey on live jellyfish. These results corroborate an ongoing ‘paradigm shift’ which recognizes that jellyfish aren’t a trophic dead-end but an important food for many marine organisms.
From the seawire: ocean news in January 2024
Galápagos penguin is exposed to and may accumulate microplastics at high rate within its food web, modelling suggests
From the seawire: ocean news in December 2023
How deep sea knowledge can support climate policies
Deep knowledge supports Angel shark protection
Bacteria linked to mass death of sea sponges weakened by warming Mediterranean
In 2021, divers off the Turkish Aegean coast first observed dark stinging sponges dying in great numbers. Researchers have now sampled three species of pathogenic Vibrio bacteria, previously known to infect unrelated marine animals, from diseased and dying sponges. Evidence suggests that vibriosis may be a secondary illness that affects already weakened sponges, but is not necessarily the primary agent of the novel disease.
Diving deeper for Tenerife's crustacean communities
From the seawire: ocean news in November 2023
Plastic additives messing with amphipod sex life
Endangered turtle population under threat as pollution may lead to excess of females being born
Researchers from Australia studied the influence of pollution on the sex ratio of clutches of sea green turtles. This species is at risk of extinction from a current lack of male hatchlings. They concluded that exposure to the heavy metals cadmium and antimony, accumulated by the mother and transferred to her eggs, may cause embryos to be feminised. Pollution may thus compound the female-biasing influence of rising global temperatures on green sea turtles.