#Denitrification in tiny #anoxic pock­ets on #sand grains could ac­count for 1/3 of total #nitrogen loss in silic­ate shelf sands.

mpi-bremen.de/en/Nitrogen-...

Our newly developed #microfluidic method revealed #microorganisms on sand grains create anoxic microenvironments allowing #denitrification in well-oxygenated sands

Out now in Scientific Reports
@natureportfolio

doi.org/10.1038/s415...

#WeekendReading: Gernon et al. show that #EnhancedWeathering of mafic rocks during continental breakup and early seafloor spreading could drive a succession of #anoxic events.
The interactions between #weathering feedback and #ClimateChange are not straightforward.
(Also, remember - weathering releases nutrients)

https://www.nature.com/articles/s41561-024-01496-0

#GlobalWarming caused widespread ocean #anoxia 93 million years ago, #DeepSea sediments research suggests
https://phys.org/news/2024-01-global-widespread-ocean-anoxia-million.html

#Warming drove the expansion of #MarineAnoxia in the equatorial #Atlantic during the #Cenomanian leading up to Oceanic #Anoxic Event 2 https://cp.copernicus.org/articles/19/2569/2023/

"During such scenarios, organic matter is buried at an elevated rate, producing distinctive layers of black #shale in the #geological record, which are depleted in the isotopically-heavier #carbon-13"

"Nearly 100 million years ago, the Earth experienced an extreme environmental disruption that choked oxygen from the oceans and led to elevated #marine #extinction levels that affected the entire globe.

Now, in a pair of complementary new studies, two Northwestern University-led teams of geoscientists report new findings on the chronology and character of events that led to this occurrence, known as #Ocean Anoxic Event 2 (OAE2),..cont."

#Anoxic Event
#AnoxicEvent
#OAE2

https://phys.org/news/2023-01-malformed-seashells-ancient-sediment-clues.html