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   Dipper (lad_hallo@mastodon.social)'s status on Friday, 16-May-2025 07:42:22 JST Dipper

   Our planet has seen 5 mass extinctions so far...and we could be well underway to see No. 6.

   https://youtu.be/gGuyqpxoT3A?si=GmoWFTFsy8Ro_l2X

   #science #savepbs #pbsterra #pbs #uspol

   • 🎓 Doc Freemo :jpf: 🇳🇱 repeated this.
   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Friday, 16-May-2025 07:42:21 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     @LaD_Hallo By every definition we already are well into a mass extinction event.

     For some background we are currently 100x to 10,000x the background extinction rate (typically its 0.1 to 1 species per million per year, and we are currently seeing 100 to 1000 extinctions per million per year). The proper units for this is E/MSY so we are seeing 100 to 1000 E/MSY right now compared to a background of 0.1 to 1 E/MSY.

     If we compare that to the rate during the big-5 mass extinctions it is as high, or significantly higher. The late devonian extinction rate (the slowest) was 70 E/MSY, meanwhile the end-permian extinction rate (the highest of the 5) was ~300 E/MSY.

     Yes we are **well** within a mass extinction, and if we do not correct things immediately after 100 years at the current rate we will see the same overall extinction as these mass extinction events.

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     Luddite Geek (luddite_geek@qoto.org)'s status on Tuesday, 20-May-2025 10:01:22 JST Luddite Geek

     in reply to

     • 🎓 Doc Freemo :jpf: 🇳🇱

     @freemo @LaD_Hallo The current elevated extinction rate is based only on the species we know about, isn't that right?

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     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Tuesday, 20-May-2025 20:59:11 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     • Luddite Geek

     @Luddite_Geek @LaD_Hallo

     No it is extrapolated from the ones we know about to estimate the overall value to include species we dont. Which is why its an estimate with a rather wide range of values.