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Fluidized muds: a novel setting for the generation of biosphere diversity through geologic time *
Author(s) -
ALLER J. Y.,
ALLER R. C.,
KEMP P. F.,
CHISTOSERDOV A. Y.,
MADRID V. M.
Publication year - 2010
Publication title -
geobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.859
H-Index - 72
eISSN - 1472-4669
pISSN - 1472-4677
DOI - 10.1111/j.1472-4669.2010.00234.x
Subject(s) - biogeochemical cycle , biosphere , earth science , phylogenetic diversity , ecology , environmental science , sedimentary rock , ecosystem , early earth , geology , biology , paleontology , phylogenetic tree , biochemistry , gene
Reworked and fluidized fine‐grained deposits in energetic settings are a major modern‐day feature of river deltas and estuaries. Similar environments were probably settings for microbial evolution on the early Earth. These sedimentary systems act as efficient biogeochemical reactors with high bacterial phylogenetic diversity and functional redundancy. They are temporally rather than spatially structured, with repeated cycling of redox conditions and successive stages of microbial metabolic processes. Intense reworking of the fluidized bed entrains bacteria from varied habitats providing new, diverse genetic materials to contribute to horizontal gene transfer events and the creation of new bacterial ecotypes. These vast mud environments may act as exporters and promoters of biosphere diversity and novel adaptations, potentially on a globally important scale.