Mastodawn

🌊 Marine heatwaves in the NE Pacific disrupt carbon cycling: small particles accumulate in mid-depths, slowing carbon export. 2015 & 2019 events show major shifts in plankton & food webs. Long-term data is key to tracking these changes.
🔗 https://www.nature.com/articles/s41467-025-63605-w?utm_source=mastodon&utm_medium=social&utm_campaign=fedica-Autoposting
#MarineHeatwaves #CarbonCycle

Marine heatwaves modulate food webs and carbon transport processes - Nature Communications

A decade of BGC-Argo and plankton records shows North Pacific heatwaves reshape food webs and trap small particles in midwater, slowing deep-ocean carbon export. Impacts vary by event, underscoring the need for sustained ocean monitoring.

Nature

michael Sep 19, 2025

18-Sep-2025
#Clownfish and #anemones are disappearing because of #climateChange
A new study led by Boston University biologists reveals that #marineHeatWaves are threatening the future of the fish made famous by #FindingNemo

http://eurekalert.org/news-releases/1098903

#science #ecology #ClimateCatastrophe #marineBiology

Clownfish and anemones are disappearing because of climate change

A new study led by Boston University marine biologists reveals that heat waves are threatening the future of the fish made famous by Finding Nemo

EurekAlert!

NSW.Biodiversity Sep 1, 2025

The SA Marine Mortality Events 2025 project.

"Dead and dying sea creatures wash up among sea foam caused by a huge algal bloom at a beach in South Australia. Sixty-one leafy seadragons, 604 Port Jackson sharks, 1,999 southern fiddler rays and 287 bluespotted goatfish make up a fraction of the dead washed up on South Australian beaches in the past months."

"The seagrass meadows...have been ravaged by runoff, pollution and physical damage...Experts say data reported by beachgoers is ‘hugely useful’ after a slow official response to disaster."
>>
https://www.theguardian.com/environment/2025/sep/01/61-leafy-seadragons-604-port-jackson-sharks-logging-the-grim-tally-of-death-in-south-australias-algal-bloom

Observing and recording death in the ocean: the SA Marine Mortality Events 2025 project >>
https://www.inaturalist.org/projects/sa-marine-mortality-events-2025
#FossilFuels #ocean #MarineHeatwaves #MassMortality #pollution #runoff #brevetoxins #CitizenScience #Ecocide #foam #governance

61 leafy seadragons, 604 Port Jackson sharks: logging the grim tally of death in South Australia’s algal bloom

Experts say data reported by beachgoers is ‘hugely useful’ after a slow official response to disaster

The Guardian

DoomsdaysCW Aug 4, 2025

More victims of #ClimateChange and #WarmingOceans. Also, #KrillHarvesting has got to STOP!

Scientists Alarmed as #Whales Suddenly Going Silent

"When you really break it down, it’s like trying to sing while you're starving."

Aug 1, 10:27 AM EDT by Victor Tangermann

"Researchers are alarmed after noticing a significant drop in the number of vocalizations from #BlueWhales.

"As National Geographic reports, scientists used specialized underwater hydrophones, meaning the aquatic version of microphones, to record and trace the sounds of marine life, allowing them to analyze the impact human activity is having on various species.

"However, as detailed in a study published in the journal PLOS One, devastating heat waves have triggered worrying changes over the past decade, allowing #ToxicAlgae to bloom and undermine food sources for whales.

" 'It caused the most widespread poisoning of marine mammals ever documented,' coauthor and Monterey Bay Aquarium Research Institute biological oceanographer John Ryan told NatGeo. 'These were hard times for whales.'

"As a result, blue whale vocalizations dropped by almost 40 percent, according to the study, with populations of #krill and #anchovy collapsing.

" 'When you really break it down, it’s like trying to sing while you're starving,' Ryan explained. 'They were spending all their time just trying to find food.' "

#OceansAreLife #Overfishing #FoodIsLife #Extinction #MarineLife #MarineHeatWaves #HeatBlob #GlobalWarming

Scientists Alarmed as Whales Suddenly Going Silent

Researchers are alarmed after noticing a significant drop in the number of vocalizations from blue whales.

Futurism

michael Jul 19, 2025

17-Jul-2025
From #kelp to #whales: #marineHeatwaves are reshaping ocean life

https://www.eurekalert.org/news-releases/1091640 #science #ecology #environment #climateCatastrophe

From kelp to whales: marine heatwaves are reshaping ocean life

New research from the University of Victoria demonstrates how marine heatwaves can dramatically impact marine ecosystems and offers a stark preview of how future ocean warming will reshape ocean life.

EurekAlert!

Maurice Lanselle Jun 29, 2025

"À Juan-les-Pins, la mer a gagné trois degrés en dix jours seulement, atteignant cinq degrés de plus que la moyenne saisonnière. La Méditerranée s'est réchauffée de manière très brutale. Une situation qui aggrave la canicule actuelle."

https://france3-regions.franceinfo.fr/provence-alpes-cote-d-azur/alpes-maritimes/plus-3-c-en-10-jours-la-temperature-de-la-mediterranee-atteint-des-records-inquietants-3179649.html

#weather #climate #MarineHeatWaves
#MediterraneanSea

Plus 3°C en 10 jours : la température de la Méditerranée atteint des records inquiétants

À Juan-les-Pins, la mer a gagné trois degrés en dix jours seulement, atteignant cinq degrés de plus que la moyenne saisonnière. La Méditerranée s'est réchauffée de manière très brutale. Une situation qui aggrave la canicule...

France 3 Provence-Alpes-Côte d'Azur

michael Jun 6, 2025

4-Jun-2025
A summer like no other: inside 2023’s record-smashing #NorthAtlantic marine #heatwave
https://www.eurekalert.org/news-releases/1085942 #science #ClimateCatastrophe #marineHeatwaves

A summer like no other: inside 2023’s record-smashing North Atlantic marine heatwave

In 2023, a basin-wide marine heatwave swept across the North Atlantic Ocean. Now, scientists have revealed what drove this unprecedented event.

EurekAlert!

ombra Jun 4, 2025

#NZ #marine sponges ‘melted’ in temperatures not expected until 2100

"Sponges have been around for more than 500 million years, surviving multiple mass extinctions. Perhaps the ability to change microbial numbers or types, depending on conditions, could account for some of that longevity?"

#MarineHeatWaves
https://cosmosmagazine.com/nature/marine-life/nz-sponges-melt-in-marine-heatwave/

New Zealand sponges ‘melted’ in marine heatwave

Cup sponges because of their sheer numbers are vital to Fiordland’s rocky, benthic marine community, but died in their millions,

Cosmos

michael May 26, 2025

@GhostOnTheHalfShell I did a feature on #kelp last year: https://proseandpassion.blogspot.com/2024/11/brown-algae-and-blue-carbon.html and one on #marineHeatwaves the year before, https://proseandpassion.blogspot.com/2023/08/our-planet-is-in-hot-water.html I think I mentioned similar problems of kelp being replaced by algae as the water warms in one of these.

brown algae and blue carbon

There is another COP climate summit coming up this week, and to fend off the evil spirits of fossil fuel dependency I've written another cli...

Show thread

CelloMom On Cars Mar 4, 2025

"The authors note that one group of researchers found that the number of such #heatwaves in 2023–2024 was 240% higher than any other year in recorded history. They also note that the more often such heat waves occur, the more difficult it is for affected areas to recover."

https://phys.org/news/2025-03-scientists-highlight-alarming-marine-worldwide.html
#OceanHeatwaves #MarineHeatwaves

I know we're land dwellers, but this is a water planet, and we need to pay attention to what's happening with the water.

Scientists highlight alarming rise in marine heat waves worldwide

A team of Earth scientists, marine biologists, oceanologists and climate change specialists affiliated with multiple institutions in Australia and the U.K. is warning of the dangers associated with an increase in the number of marine heat waves in recent years.

Phys.org