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Contrasting microbial assemblages in adjacent water masses associated with the E ast A ustralian C urrent
Author(s) -
Seymour Justin R.,
Doblin Martina A.,
Jeffries Thomas C.,
Brown Mark V.,
Newton Kelly,
Ralph Peter J.,
Baird Mark,
Mitchell James G.
Publication year - 2012
Publication title -
environmental microbiology reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.229
H-Index - 69
ISSN - 1758-2229
DOI - 10.1111/j.1758-2229.2012.00362.x
Subject(s) - prochlorococcus , synechococcus , ecotype , temperate climate , biology , ecology , microbial population biology , crenarchaeota , plankton , cyanobacteria , phylogenetic tree , bacteria , gene , biochemistry , genetics
Summary Different oceanographic provinces host discrete microbial assemblages that are adapted to local physicochemical conditions. We sequenced and compared the metagenomes of two microbial communities inhabiting adjacent water masses in the T asman S ea, where the recent strengthening of the E ast A ustralian C urrent ( EAC ) has altered the ecology of coastal environments. Despite the comparable latitude of the samples, significant phylogenetic differences were apparent, including shifts in the relative frequency of matches to C yanobacteria , C renarchaeota and E uryarchaeota . Fine‐scale variability in the structure of SAR 11 , P rochlorococcus and S ynechococcus populations, with more matches to ‘warm‐water’ ecotypes observed in the EAC , indicates the EAC may drive an intrusion of tropical microbes into temperate regions of the T asman S ea. Furthermore, significant shifts in the relative importance of 17 metabolic categories indicate that the EAC prokaryotic community has different physiological properties than surrounding waters.