Qhov txawv ntawm Ediacaran Extinction thiab Cambrian Explosion

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Qhov txawv ntawm Ediacaran Extinction thiab Cambrian Explosion
Qhov txawv ntawm Ediacaran Extinction thiab Cambrian Explosion

Video: Qhov txawv ntawm Ediacaran Extinction thiab Cambrian Explosion

Video: Qhov txawv ntawm Ediacaran Extinction thiab Cambrian Explosion
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Qhov sib txawv tseem ceeb ntawm Ediacaran extinction thiab Cambrian tawg yog tias Ediacaran extinction yog thawj zaug paub tias kev ploj tuag ntawm macroscopic eukaryotic lub neej thaum Cambrian tawg yog qhov tshwm sim tam sim ntawd hauv cov ntaub ntawv fossil ntawm cov tsiaj nyuaj nrog cov pob txha pob txha.

Ediacaran extinction thiab Cambrian tawg yog ob qhov xwm txheej uas tseem ceeb tshaj plaws hauv keeb kwm ntawm lub neej hauv ntiaj teb. Ediacaran extinction tam sim ntawd ua ntej Cambrian tawg. Ediacaran extinction yog hais txog kev tuag ntawm cov tsiaj macroscopic loj. Nws yog ua raws los ntawm Cambrian tawg lossis qhov tshwm sim sai ntawm cov pob txha pob txha pob txha thiab cov pob txha pob txha ntawm cov tsiaj nyuaj. Ediacaran extinction tshwm sim 542 lab xyoo dhau los thaum Cambrian tawg tshwm sim 541 lab xyoo dhau los.

Ediacaran Extinction yog dab tsi?

Ediacaran extinction yog qhov kev ploj tuag loj uas tshwm sim thaum kawg ntawm lub sijhawm Ediacaran. Nws tshwm sim 542 lab xyoo dhau los. Thawj qhov tshwm sim ntawm tus tsiaj macroscopic tshwm sim nees nkaum lab xyoo ua ntej Ediacaran extinction. Nov yog lub ntiaj teb thawj qhov kev paub txog kev ploj tuag. Thaum lub sij hawm no extinction, Ediacaran biota thiab calcifying kab mob dheev ploj mus. Ediacaran biota suav nrog cov kab mob mos uas yog macroscopic, multicellular thiab complex kab mob. Calcifying kab mob muaj ib tug carbonate skeleton. Ob hom kab mob calcifying uas ploj lawm hauv Ediacaran extinction yog Cloudina thiab Namacalathus.

Qhov txawv ntawm Ediacaran Extinction thiab Cambrian Explosion
Qhov txawv ntawm Ediacaran Extinction thiab Cambrian Explosion

Daim duab 01: Lub Neej Hauv Hiav Txwv Ediacaran

Lub sijhawm dhau mus, cov tsiaj tuag tau hloov zuj zus los ntawm cov tsiaj tshiab hloov zuj zus. Qhov tseeb ua rau Ediacaran extinction tseem tsis tau paub. Txawm li cas los xij, qee cov pov thawj qhia tias qhov poob ntawm cov pa oxygen hauv lub ntiaj teb dej hiav txwv ua rau muaj kev cuam tshuam ntau dua rau marine anoxia. Nws ntseeg tau tias marine anoxia pab txhawb rau kev poob qis thiab qhov tshwm sim ntawm cov tsiaj thaum ntxov.

Cambrian Explosion yog dab tsi?

Cambrian tawg yog qhov tshwm sim tam sim ntawd hauv cov ntaub ntawv fossil ntawm cov tsiaj txhu nyuaj nrog cov pob txha pob txha pob txha. Hauv lwm lo lus, Cambrian tawg yog qhov tshwm sim sai ntawm cov pob txha pob txha pob txha thiab cov pob txha pob txha. Nws tshwm sim tom qab ib lab xyoo ntawm Ediacaran extinction, yog li nws tau tshwm sim 541 lab xyoo dhau los.

Zoo ib yam li Ediacaran extinction, Cambrian tawg yog ib qho ntawm cov xwm txheej tseem ceeb tshaj plaws uas tshwm sim hauv keeb kwm ntawm lub neej hauv ntiaj teb. Nws yog ib qho xwm txheej ceev uas tau tshwm sim nyob rau lub sijhawm luv luv thiab tseem yog cov txheej txheem zoo kawg nkaus vim qhov kev nthuav tawm ntawm cov phiaj xwm loj tshaj plaws ntawm lub cev hauv cov ntaub ntawv fossil. Txawm li cas los xij, feem ntau ntawm cov pob txha nrhiav pom hauv Cambrian tawg tsis to taub thiab nyuaj rau kev faib tawm.

Qhov txawv tseem ceeb - Ediacaran Extinction vs Cambrian Explosion
Qhov txawv tseem ceeb - Ediacaran Extinction vs Cambrian Explosion

Daim duab 02: Lub Sijhawm Ua Neej Hauv Ntiaj Teb

Lub sijhawm no, qhov tshwm sim sai sai ntawm ntau yam tsiaj tau tshwm sim. Yog li ntawd, cov kev sib tshuam ecological tshiab tsim ntawm cov kab mob. Tsis tas li ntawd, ecosystems tau dhau los ua nyuaj vim muaj pes tsawg tus thiab ntau yam kab mob tau nce.

Dab tsi zoo sib xws ntawm Ediacaran Extinction thiab Cambrian Explosion?

  • Ediacaran extinction thiab Cambrian tawg yog ob-theem biotic turnover txheej xwm uas tshwm sim nyob rau hauv Ediacaran-Cambrian hloov.
  • Ob txheej txheem piav qhia lub ntiaj teb thawj qhov teeb meem loj ntawm cov kab mob macroscopic eukaryotic lub neej.
  • Lub Sijhawm Ediacaran tau tshwm sim ua ntej Cambrian Explosion.

Qhov txawv ntawm Ediacaran Extinction thiab Cambrian Explosion yog dab tsi?

Ediacaran extinction yog qhov kev ploj tuag loj uas tshwm sim thaum kawg ntawm Ediacaran lub sijhawm thaum Cambrian tawg yog qhov tshwm sim tam sim ntawd hauv cov ntaub ntawv fossil ntawm cov tsiaj txhu nyuaj nrog cov pob txha pob txha. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm Ediacaran extinction thiab Cambrian tawg. Ntxiv mus, Ediacaran extinction tshwm sim 542 lab xyoo dhau los thaum Cambrian tawg tshwm sim 541 lab xyoo dhau los.

Dhau li, lwm qhov sib txawv ntawm Ediacaran extinction thiab Cambrian tawg yog tias qhov xwm txheej loj ntawm Ediacaran extinction yog qhov kev ploj tuag loj ntawm macroscopic eukaryotic lub neej, tab sis qhov xwm txheej loj ntawm Cambrian tawg yog qhov tshwm sim sai ntawm cov pob txha pob txha thiab cov nyom. taug fossils.

Qhov txawv ntawm Ediacaran Extinction thiab Cambrian Explosion hauv Tabular Form
Qhov txawv ntawm Ediacaran Extinction thiab Cambrian Explosion hauv Tabular Form

Summary – Ediacaran Extinction vs Cambrian Explosion

Ediacaran extinction yog qhov kev ploj tuag loj uas tshwm sim hauv Ediacaran biota thiab calcifying kab mob thaum kawg ntawm lub sijhawm Ediacaran. Lawv yog macroscopic eukaryotic kab mob. Tom qab ib lab xyoo ntawm Ediacaran extinction, Cambrian tawg tshwm sim. Nws yog qhov tshwm sim tam sim ntawd ntawm cov pob txha pob txha pob txha thiab cov pob txha pob txha. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm Ediacaran extinction thiab Cambrian tawg.

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