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A rich marine algal ecosystem 600 million years earlier than previously thought


Credit: © Don E. Canfield/University of Southern Denmark
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?
In a new study Zhang et al use the molecular remains of ancient algae (so-called biomarkers) to show that algae occupied an important role in marine ecosystems 1400 million years ago, some 600 million years earlier than previously recognized. ....

Shuichang Zhang , Don Canfield , University Of Southern Denmark , Nordic Center , Xiamaling Formation , Earth Evolution , Southern Denmark , Marine Freshwater Biology , Earth Science , தாதா கேன்ஃபீல்ட் , பல்கலைக்கழகம் ஆஃப் தெற்கு டென்மார்க் , நோர்டிக் மையம் , பூமி பரிணாமம் , தெற்கு டென்மார்க் ,

Biến hóa vết bẩn, đồ thừa thành bức tranh đường phố đẹp mắt

Biến hóa vết bẩn, đồ thừa thành bức tranh đường phố đẹp mắt
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