The first metazoa living in permanently anoxic conditions |
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Authors: | Roberto Danovaro Antonio Dell'Anno Antonio Pusceddu Cristina Gambi Iben Heiner Reinhardt Møbjerg Kristensen |
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Affiliation: | (1) Department of Marine Science, Faculty of Science, Polytechnic University of Marche, Via Brecce Bianche, 60131 Ancona, Italy;(2) Zoological Museum, Invertebrate Department, Natural History Museum of Denmark, Universitetsparken 15, DK-2100 Copenhagen, Denmark |
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Abstract: | Background Several unicellular organisms (prokaryotes and protozoa) can live under permanently anoxic conditions. Although a few metazoans can survive temporarily in the absence of oxygen, it is believed that multi-cellular organisms cannot spend their entire life cycle without free oxygen. Deep seas include some of the most extreme ecosystems on Earth, such as the deep hypersaline anoxic basins of the Mediterranean Sea. These are permanently anoxic systems inhabited by a huge and partly unexplored microbial biodiversity. |
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