Marine life quickly recovered after global mass extinction

Science Daily ^ | 6/17/2016 | Becky Oskin

[JimSEA]

Reptiles rapidly invaded the seas soon after a global extinction wiped out most life on Earth, according to a new study led by University of California, Davis, researchers.

Global climate change -- likely triggered by massive volcanic eruptions -- killed off more than 95 percent of all species about 250 million years ago, at the end of the Permian period. Land reptiles colonized the ocean in just 3.35 million years at the beginning of the Triassic, a speedy recovery in geologic time, the researchers report in the journal Scientific Reports.

"Our results fit with the emerging view that the recovery was faster than previously thought," said study co-author Ryosuke Motani, professor of paleobiology at UC Davis' Department of Earth and Planetary Sciences.

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The oldest marine reptile fossils appeared 248.81 million years ago, the most precise date yet, according to the study. These pioneering marine reptiles, including the dolphin-like ichthyosaurs and sauropterygians, went on to rule the Mesozoic seas during the era of the dinosaurs

[JimSEA]

Mass Extinction Events

Ocean mixing led to recovery

At the same time, there were major changes in ocean chemistry and carbon cycling, the team found. Vertical mixing of oceanic water had stopped during or soon after the mass extinction, causing widespread depletion of oxygen in the oceans. Carbon isotopes in the Majiashan rock layers suggest the oldest marine reptiles appeared just after a return to healthy ocean circulation, which could have prompted the ecosystem recovery, the researchers suggest. The rocks recorded more vigorous mixing of ocean waters, which would have brought nutrient-rich waters to the surface to fuel tiny organisms at the bottom of the ocean's food chain.

[JimSEA]

Sorry. My graph post wasn’t proper.

[stars & stripes forever]

Marine life were not on the ark. They survived the flood.

[TigersEye]

I caught this one last week on a treble hook with silver spinners!

[stars & stripes forever]

That one may have drifted into a colder climate. LOL

[TigersEye]

I don’t know about cold, I was sweating like Michael Moore in a sauna when I finally landed it. ;-)

[stars & stripes forever]

[I don’t know about cold, I was sweating like Michael Moore in a sauna when I finally landed it. ;-)]

Did it taste like chicken?

[Know et al]

Were you casting or trolling? What bait were you using?
If you don't want to share your secrets I'll understand. LOL

[Know et al]

I hate to burst your bubble but I caught one so big I had to take two pictures of it to get it all in.

[Jack Hammer]

“Global climate change — likely triggered by massive volcanic eruptions — killed off more than 95 percent of all species...”

You can believe it was climate change - these scientists were there and saw it for themselves.

Oh, wait a minute...

[dfwgator]

“Global climate change — likely triggered by massive volcanic eruptions — killed off more than 95 percent of all species...”

No, everybody knows it was those evil SUVs.

[TigersEye]

My sweat? It tastes a little like BBQ sauce I’ll have to admit.

Oh, the critter! I’m strictly a catch and release guy.

[TigersEye]

Bait? I never use bait I’m a purist. Silver spinners trolling behind a high speed cigarette boat.
Don’t want one of those to catch up to you before it’s tired out.

I’d prove you wrong but I knocked my camera overboard in the fight.

[TigersEye]

Suppose we hitch our wagon to the hydrocarbon theory and the cause is something completely different and 1000 times more dangerous?

That would probably be a mistake since Most of the last 10,000 years were warmer.

[TigersEye]

It seems to me that liberals don’t care a whit about good science.
Reason and facts don’t seem to sway them at all.

[TigersEye]

LOL

I used to have a very hard time getting up in the morning. I put my clock radio on a rock station and turned up the volume. I would just fall back asleep with my favorite tunes playing in my dreams.

Then I put my alarm on NPR on normal volume. Within two minutes, guaranteed, I would rocket out of bed angrier than a hornet at the BS I had just heard with no possibility of falling back to sleep again.

Happily I don’t need an alarm anymore.

[JimSEA]

We only know about these events by their geologic fingerprints. Her money statement is: Vertical mixing of oceanic water had stopped during or soon after the mass extinction, causing widespread depletion of oxygen in the oceans. The restoration of the mixing of the layers of ocean certainly restored a habitat the destruction of which had decimated ocean fauna. Volcanic activity like that which over time created the Siberian Trapps put out plenty of nasty things CO2 is one of them.