The biogeographic differentiation of algalmicrobiomes in the upper ocean from pole to pole


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Klaus.Valentin [ at ] awi.de

Abstract

Eukaryotic phytoplankton are responsible for at least 20% of annual global carbonfixation.Their diversity and activity are shaped by interactions with prokaryotes as part of complexmicrobiomes. Although differences in their local species diversity have been estimated, westill have a limited understanding of environmental conditions responsible for compositionaldifferences between local species communities on a large scale from pole to pole. Here, weshow, based on pole-to-pole phytoplankton metatranscriptomes and microbial rDNAsequencing, that environmental differences between polar and non-polar upper oceans moststrongly impact the large-scale spatial pattern of biodiversity and gene activity in algalmicrobiomes. The geographic differentiation of co-occurring microbes in algal microbiomescan be well explained by the latitudinal temperature gradient and associated break points intheir beta diversity, with an average breakpoint at 14 °C ± 4.3, separating cold and warmupper oceans. As global warming impacts upper ocean temperatures, we project that breakpoints of beta diversity move markedly pole-wards. Hence, abrupt regime shifts in algalmicrobiomes could be caused by anthropogenic climate change.



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Article
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Helmholtz Cross Cutting Activity (2021-2027)
N/A
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Published
Eprint ID
54718
DOI 0.1038/s41467-021-25646-9

Cite as
Kara, M. , Schmidt, K. , Toseland, A. , Boulton, A. , Barry, K. , Beszteri, B. , Brussaard, C. P. D. , Clum, A. , Daum, C. G. , Eloe-Fadrosh, E. , Fong, A. , Foster, B. , Foster, B. , Ginzburg, M. , Huntemann, M. , Ivanova, N. N. , Kyrpides, N. C. , Lindquist, E. , Mukherjee, S. , Palaniappan, K. , Reddy, T. , Rizkallah, M. R. , Roux, S. , Timmermans, K. , Tringe, S. G. , van dePoll, W. H. , Varghese, N. , Valentin, K. U. , Lenton, T. M. , Grigoriev, I. V. , Leggett, R. M. , Moulton, V. and Mock, T. (2021): The biogeographic differentiation of algalmicrobiomes in the upper ocean from pole to pole , NATURE COMMUNICATIONS, 12 (1), pp. 1-15 . doi: 0.1038/s41467-021-25646-9


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