Loading...
Low diversity of planktonic bacteria in the tropical ocean.
Milici, Mathias Tomasch, Jürgen Wos-Oxley, Melissa L Wang, Hui Jáuregui, Ruy Camarinha-Silva, Amelia Deng, Zhi-Luo Plumeier, Iris Giebel, Helge-Ansgar Wurst, Mascha
Milici, Mathias
Tomasch, Jürgen
Wos-Oxley, Melissa L
Wang, Hui
Jáuregui, Ruy
Camarinha-Silva, Amelia
Deng, Zhi-Luo
Plumeier, Iris
Giebel, Helge-Ansgar
Wurst, Mascha
Files
Loading...
Open Access publication
Adobe PDF, 1.32 MB
Loading...
supporting information
Adobe PDF, 536.71 KB
Other Titles
Abstract
The diversity of macro-organisms increases towards the equator, with almost no exceptions. It is the most conserved biogeographical pattern on earth and is thought to be related to the increase of temperature and productivity in the tropics. The extent and orientation of a latitudinal gradient of marine bacterioplankton diversity is controversial. Here we studied the euphotic zone of the Atlantic Ocean based on a transect covering ~12.000 km from 51°S to 47 °N. Water samples were collected at 26 stations at five depths between 20 and 200 m and sequentially filtered through 8 μm, 3 μm and 0,22 μm filters, resulting in a total of 359 samples. Illumina sequencing of the V5-V6 region of the 16S rRNA gene revealed a clear biogeographic pattern with a double inverted latitudinal gradient. Diversity was higher in mid-latitudinal regions of the Atlantic Ocean and decreased towards the equator. This pattern was conserved for bacteria from all three planktonic size fractions. Diversity showed a non-linear relationship with temperature and was negatively correlated with bacterial cell numbers in the upper depth layers (<100 m). The latitudinal gradients of marine bacterial diversity and the mechanisms that govern them are distinct from those found in macro-organisms.
Citation
Low diversity of planktonic bacteria in the tropical ocean. 2016, 6:19054 Sci Rep
Publisher
Journal
PubMed ID
PubMed Central ID
Additional Links
Embedded video
Type
Article
Language
en
Description
Series/Report no.
ISSN
2045-2322