The influence of environmental setting on the community ecology of Ediacaran organisms.

Autor:	Mitchell EG; Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK., Bobkov N; Trofimuk Institute of Petroleum Geology and Geophysics, 3, Ac. Koptyuga ave., Novosibirsk 630090, Russian Federation.; Novosibirsk State University, Novosibirsk, Novosibirsk Oblast 630090, Russian Federation., Bykova N; Trofimuk Institute of Petroleum Geology and Geophysics, 3, Ac. Koptyuga ave., Novosibirsk 630090, Russian Federation.; Department of Geosciences, Virginia Tech, Blacksburg, VA 24061, USA., Dhungana A; Department of Earth Sciences, Durham University, Lower Mountjoy, South Road, Durham DH1 3LE, UK., Kolesnikov AV; Trofimuk Institute of Petroleum Geology and Geophysics, 3, Ac. Koptyuga ave., Novosibirsk 630090, Russian Federation.; Geological Institute, Russian Academy of Sciences, Pygevsky 7, Moscow 119017, Russia.; Faculty of Geography, Moscow State Pedagogical University, Kibalchicha str. 16, Moscow 129626, Russia., Hogarth IRP; Department of Chemical Engineering, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, UK., Liu AG; Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK., Mustill TMR; Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK., Sozonov N; Trofimuk Institute of Petroleum Geology and Geophysics, 3, Ac. Koptyuga ave., Novosibirsk 630090, Russian Federation.; Novosibirsk State University, Novosibirsk, Novosibirsk Oblast 630090, Russian Federation., Rogov VI; Trofimuk Institute of Petroleum Geology and Geophysics, 3, Ac. Koptyuga ave., Novosibirsk 630090, Russian Federation., Xiao S; Department of Geosciences, Virginia Tech, Blacksburg, VA 24061, USA., Grazhdankin DV; Trofimuk Institute of Petroleum Geology and Geophysics, 3, Ac. Koptyuga ave., Novosibirsk 630090, Russian Federation.; Novosibirsk State University, Novosibirsk, Novosibirsk Oblast 630090, Russian Federation.
Jazyk:	angličtina
Zdroj:	Interface focus [Interface Focus] 2020 Aug 06; Vol. 10 (4), pp. 20190109. Date of Electronic Publication: 2020 Jun 12.
DOI:	10.1098/rsfs.2019.0109
Abstrakt:	The broad-scale environment plays a substantial role in shaping modern marine ecosystems, but the degree to which palaeocommunities were influenced by their environment is unclear. To investigate how broad-scale environment influenced the community ecology of early animal ecosystems, we employed spatial point process analyses (SPPA) to examine the community structure of seven late Ediacaran (558-550 Ma) bedding-plane assemblages drawn from a range of environmental settings and global localities. The studied palaeocommunities exhibit marked differences in the response of their component taxa to sub-metre-scale habitat heterogeneities on the seafloor. Shallow-marine (nearshore) palaeocommunities were heavily influenced by local habitat heterogeneities, in contrast to their deeper-water counterparts. The local patchiness within shallow-water communities may have been further accentuated by the presence of grazers and detritivores, whose behaviours potentially initiated a propagation of increasing habitat heterogeneity of benthic communities from shallow to deep-marine depositional environments. Higher species richness in shallow-water Ediacaran assemblages compared to deep-water counterparts across the studied time-interval could have been driven by this environmental patchiness, because habitat heterogeneities increase species richness in modern marine environments. Our results provide quantitative support for the 'Savannah' hypothesis for early animal diversification-whereby Ediacaran diversification was driven by patchiness in the local benthic environment. Competing Interests: We declare we have no competing interests. (© 2020 The Author(s).)
Databáze:	MEDLINE
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