English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

During the last decade, the hypothesis that one or more biodiversity drops inthe Phanerozoic eon, evident in the geological record, might have been causedby the most powerful kind of stellar explosion so far known (Gamma Ray Bursts)has been discussed in several works. These stellar explosions could have leftan imprint in the biological evolution on Earth and in other habitable planets.In this work we calculate the short-term lethality that a GRB would produce inthe aquatic primary producers on Earth. This effect on life appears as a resultof ultraviolet (UV) re-transmission in the atmosphere of a fraction of thegamma energy, resulting in an intense UV flash capable of penetrating ~ tens ofmeters in the water column in the ocean. We focus on the action of the UV flashon phytoplankton, as they are the main contributors to global aquatic primaryproductivity. Our results suggest that the UV flash could cause an hemisphericreduction of phytoplankton biomass in the upper mixed layer of the World Oceanof around 10%, but this figure can reach up to 25 % for radiation-sensitivepicoplankton species, and/or in conditions in which DNA repair mechanisms areinhibited.

Intense ultraviolet perturbations on aquatic primary producers