期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 115, 期 35, 页码 EB266-EB275出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1719335115
关键词
prokaryotes; eukaryotes; Rapoport's rule; richness; latitude
资金
- Bioplatforms Australia
- Integrated Marine Observing System through the Australian Government National Collaborative Research Infrastructure Strategy
- Integrated Marine Observing System through the Education Investment Fund Super Science Initiative
- CSIRO
- Australian Climate Change Science Program
- Marine National Facility
- Alfred Wegener Institute
- University of Western Australia
- CSIRO Office of Community Engagement Science Leader Fellowship [R-04202]
- CSIRO Oceans and Atmosphere Environmental Genomics Grant [R-02412]
Marine microbes along with microeukaryotes are key regulators of oceanic biogeochemical pathways. Herewe present a high-resolution (every 0.5 degrees of latitude) dataset describing microbial pro-and eukaryotic richness in the surface and just below the thermocline along a 7,000-km transect from 66 degrees S at the Antarctic ice edge to the equator in the South Pacific Ocean. The transect, conducted in austral winter, covered key oceanographic features including crossing of the polar front (PF), the subtropical front (STF), and the equatorial upwelling region. Our data indicate that temperature does not determine patterns of marine microbial richness, complementing the global model data from Ladau et al. [Ladau J, et al. (2013) ISME J 7:1669-1677]. Rather, NH4+, nanophytoplankton, and primary productivity were the main drivers for archaeal and bacterial richness. Eukaryote richness was highest in the least-productive ocean region, the tropical oligotrophic province. We also observed a unique diversity pattern in the South Pacific Ocean: a regional increase in archaeal and bacterial diversity between 10 degrees S and the equator. Rapoport's rule describes the tendency for the latitudinal ranges of species to increase with latitude. Our data showed that the mean latitudinal ranges of archaea and bacteria decreased with latitude. We show that permanent oceanographic features, such as the STF and the equatorial upwelling, can have a significant influence on both alpha-diversity and beta-diversity of pro-and eukaryotes.
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