[lukastr0]

> Given crabs in general have been around adapting for 145m years, I do not think the current levels will be detrimental.

That argument often comes up when discussing wildlife impacts of global warming. The problem is, the rate of CO2 increase vastly exceeds anything that happened naturally. The rate of change is the problem here.

[ghastmaster]

This is not true. Given that temperature and co2 rise sync with each other(still debated) and OA are fairly synchronous, the steep decline and subsequent rise in temperature from appx. 8400ya - 8000ya(Vinther, B., et al., 2009) exceeds what we are seeing now. Notably that fall and rise was at a much higher temperature as well. I can only assume this has happened many many times previously.

[faded242]

https://www.climate.gov/sites/default/files/paleo_CO2_2018_1...

[omgwtfbyobbq]

I don't believe the temperature changes 8400-8000ya were associated with the same change in CO2 levels we're seeing now. CO2 has been a lagging indicator of temperature in the past, but I don't believe it's been a driver like it is today.

https://svs.gsfc.nasa.gov/11362