{"title":"Evolutionary-Ecological Aspects of the Origin and Early Diversification of Multicellular Animals","authors":"S. V. Rozhnov","doi":"10.1134/s0031030123110114","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Oxygen oases were the ecological niches where the evolutionary processes that led to the emergence of the first multicellular animals probably took place. These oases likely appeared in zones of maximum photosynthesis at depths of 10–30 meters in the pelagic zone and on the sea bottom, due to the delay in the release of oxygen from seawater into the atmosphere. The likelihood of the emergence of multicellularity among choanoflagellates, ancestral to Metazoa, is supported by their wide range of life forms, which through various morphogenetic pathways developed the main archetypes postulated by the hypotheses of Phagocytella, Gastraea, Synzoospores and their modifications.</p>","PeriodicalId":19816,"journal":{"name":"Paleontological Journal","volume":"223 1","pages":""},"PeriodicalIF":0.7000,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Paleontological Journal","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1134/s0031030123110114","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PALEONTOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Oxygen oases were the ecological niches where the evolutionary processes that led to the emergence of the first multicellular animals probably took place. These oases likely appeared in zones of maximum photosynthesis at depths of 10–30 meters in the pelagic zone and on the sea bottom, due to the delay in the release of oxygen from seawater into the atmosphere. The likelihood of the emergence of multicellularity among choanoflagellates, ancestral to Metazoa, is supported by their wide range of life forms, which through various morphogenetic pathways developed the main archetypes postulated by the hypotheses of Phagocytella, Gastraea, Synzoospores and their modifications.
期刊介绍：
Paleontological Journal (Paleontologicheskii zhurnal) is the principal Russian periodical in paleontology. The journal publishes original work on the anatomy, morphology, and taxonomy of fossil organisms, as well as their distribution, ecology, and origin. It also publishes studies on the evolution of organisms, ecosystems, and the biosphere and provides invaluable information on global biostratigraphy with an emphasis on Eastern Europe and Asia.
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