The first photosynthetic oxygen-producing organisms on Earth were cyanobacteria. Their evolution dramatically changed the Earth allowing oxygen to accumulate into the atmosphere for the first time and further allowing the evolution of oxygen-utilizing organisms including eukaryotes. Eukaryotes include animals, but also algae, a broad group of photosynthetic oxygen-producing organisms that now dominate photosynthesis in the modern oceans. When, however, did algae begin to occupy marine ecosystems and compete with cyanobacteria as important phototrophic organisms?
Title: A rich marine algal ecosystem 600 million years earlier than previously thought
Sourced From: www.sciencedaily.com/releases/2021/04/210416120019.htm
Published Date: Fri, 16 Apr 2021 12:00:19 EDT
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