生物の85％が絶滅したのに、なぜ世界は崩壊しなかったのか？｜オルドビス紀末の大量絶滅【ゆっくり解説】

The Ordovician-End-of-Earth Extinction Event (LOME), which occurred approximately 444 million years ago, is one of the "Big Five" mass extinction events in Earth's history. Remarkably, despite the loss of approximately 85% of species, the fundamental structure of ecosystems did not collapse. This article will explain, incorporating the latest research, the following: Why did the mass extinction occur? Why was 85% of species lost? Why did ecosystems not collapse despite this loss? What was the most devastating factor that ultimately led to the extinction of life? Let's explore one of Earth's greatest mysteries together. Cited Sites 1. LOME Basics and Common Theories (Two-Stage Extinction, Cause) Late Ordovician Mass Extinction (Overview, Two-Phase Structure, etc.) https://en.wikipedia.org/wiki/Late_Or... Late Ordovician Mass Extinction: Earth, Fire and Ice (Overview. Two-Phase Structure, Candidate Causes) https://academic.oup.com/nsr/article/... The Late Ordovician Mass Extinction (Classic Review. Two-Stage Extinction and Millions of Years of Recovery) https://www.annualreviews.org/content... Was the Late Ordovician Mass Extinction truly Exceptional? (Recent review. Long-term crisis perspective) https://www.sciencedirect.com/science... Tempo of the Late Ordovician mass extinction controlled by the rate of climate change https://pmc.ncbi.nlm.nih.gov/articles... 2. Discussion of Anoxia, U/Mo Isotopes, and Globality Abrupt global-ocean anoxia during the Late Ordovician–early Silurian detected using uranium isotopes of marine carbonates https://www.pnas.org/doi/10.1073/pnas... Sulfidic anoxia in the oceans during the Late Ordovician mass extinctions – insights from molybdenum and uranium isotopic global redox proxies https://findresearcher.sdu.dk/ws/port... Uranium isotopes in marine carbonates as a global ocean paleoredox proxy: A critical review https://www.sciencedirect.com/science... Uranium isotope compositions of biogenic carbonates – Implications for U uptake in shells and the application of the paleo-ocean oxygenation proxy https://pmc.ncbi.nlm.nih.gov/articles... Mo marine geochemistry and reconstruction of ancient ocean redox states (Review of Mo isotope proxies) https://www.academia.edu/124881178/Mo... 3. Environmental changes, volcanoes, and nutrients in LOME A nutrient control on expanded anoxia and global cooling during the Late Ordovician mass extinction https://www.nature.com/articles/s4324... Late Ordovician climate change and extinctions driven by elevated volcanic nutrient supply https://eprints.whiterose.ac.uk/id/ep... Late Ordovician mass extinction caused by volcanism, warming, and Anoxia https://pubs.geoscienceworld.org/gsa/... 4. Recovery and Return of Diversity Rapid recovery from the Late Ordovician mass extinction https://www.pnas.org/doi/10.1073/pnas... Biotic recovery after the Late Ordovician Mass Extinction Event https://www.tandfonline.com/doi/abs/1... 5. Selectivity, Climate, and Extinction Climate change and the selective signature of the Late Ordovician mass Extinction https://www.pnas.org/doi/10.1073/pnas... Biogeographic and bathymetric determinants of brachiopod extinction and survival during the Late Ordovician mass extinction https://pmc.ncbi.nlm.nih.gov/articles... 6. Supplementary References (Examples) Overview of the Ordovician Period https://en.wikipedia.org/wiki/Ordovician Ordovician–Silurian extinction (Alternative Expression/Overview) https://www.britannica.com/science/Or... *This video is based on the latest scientific findings, but research is ongoing. Please refer to the original paper for details. Background music borrowed from: "MOMIZizm MUSiC (Momijiba) | Free BGM" https://music.storyinvention.com/ Character illustration material: Funichika Illustrations and some diagrams were created using AI.