報告顯示全球各地區生物多樣性持續惡化

????????? ????? ????? 443.8–419.2?????????? ???????????? ???? Pre? ? O S D C P T J K Pg N
Mean atmospheric O ₂ content over period duration	c. 14 vol?%^[1]^[2] (70?% of modern level)
Mean atmospheric CO ₂ content over period duration	c. 4500 ppm^[3]^[4] (16 times pre-industrial level)
Mean surface temperature over period duration	c. 17?°C^[5]^[6] (3?°C above modern level)
Sea level (above present day)	Around 180?m, with short-term negative excursions^[7]

百度引智单位扩至各类创新主体本市将加大对引进海外人才的支持力度。

????????? ?????? ????????? ????? (Silurian) ?????? 443.8 ????????? ???????????? ??????????? 419.2 ????????? ???????????? ???? ?????? ???????? ??????????? ???? ???????????? ??????????. ?????????????? ??????? 6 ?????????? 3??? ?????? ????????? ????? ???????????? ??????????????????????? ????????? ????????? ???????? ?????? ????????? ???????????. ???? ??????? ?????????? ????? ????????? ????????? ??????, ???????? ?????? ???????? ??????? ??????????????? ??????????? ???????? ??????? 5-10 ????????? ?????????? ?????????? ??????. ??????????? 60% ??? ???????? ??????????-??????? ????? ?????????? ??????? ????? ??????????? ???????????????.

???????????

↑ Image:Sauerstoffgehalt-1000mj.svg
↑ Image:OxygenLevelsThroughEarthHistory.png
↑ Image:Phanerozoic Carbon Dioxide.png
↑ Image:CO2LevelsThroughEarthHistory.png
↑ Image:All palaeotemps.png
↑ Image:TemperatureLevelsOverEarthHistory.png
↑ Haq, B. U. (2008). "A Chronology of Paleozoic Sea-Level Changes". Science 322: 64-68. doi:10.1126/science.1161648.?

???????????????

Paleos: ????????????? 2025-08-08 at the ??????? ????????? ????????? ?????
UCMP Berkeley: ????????? ?????
Paleoportal: Silurian strata in U.S., state by state ????????????? 2025-08-08 at the ??????? ?????????
USGS:Silurian and Devonian Rocks (U.S.) ????????????? 2025-08-08 at the ??????? ?????????
"International Commission on Stratigraphy (ICS)". Geologic Time Scale 2004. {{cite web}}: Unknown parameter |accessmonthday= ignored (help); Unknown parameter |accessyear= ignored (help)
Examples of Silurian Fossils

Paleozoic Era
??????????? ?????	???????????? ?????	????????? ?????	????????? ?????	?????????????? ?????	????????? ?????

[1] Image:Sauerstoffgehalt-1000mj.svg

[2] Image:OxygenLevelsThroughEarthHistory.png

[3] Image:Phanerozoic Carbon Dioxide.png

[4] Image:CO2LevelsThroughEarthHistory.png

[5] Image:All palaeotemps.png

[6] Image:TemperatureLevelsOverEarthHistory.png

[7] Haq, B. U. (2008). "A Chronology of Paleozoic Sea-Level Changes". Science 322: 64-68. doi:10.1126/science.1161648.?

[1]

[2]

[3]

[4]

[5]

[6]

[7]

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