Metagenomic insights into zooplankton-associated bacterial communities

Author(s)
Daniele De Corte, Abhishek Srivastava, Marja Koski, Juan Antonio L. Garcia, Yoshihiro Takaki, Taichi Yokokawa, Takuro Nunoura, Nathalie H. Elisabeth, Eva Sintes, Gerhard J. Herndl
Abstract

Zooplankton and microbes play a key role in the ocean's biological cycles by releasing and consuming copious amounts of particulate and dissolved organic matter. Additionally, zooplankton provide a complex microhabitat rich in organic and inorganic nutrients in which bacteria thrive. In this study, we assessed the phylogenetic composition and metabolic potential of microbial communities associated with crustacean zooplankton species collected in the North Atlantic. Using Illumina sequencing of the 16S rRNA gene, we found significant differences between the microbial communities associated with zooplankton and those inhabiting the surrounding seawater. Metagenomic analysis of the zooplankton-associated microbial community revealed a highly specialized bacterial community able to exploit zooplankton as microhabitat and thus, mediating biogeochemical processes generally underrepresented in the open ocean. The zooplankton-associated bacterial community is able to colonize the zooplankton's internal and external surfaces using a large set of adhesion mechanisms and to metabolize complex organic compounds released or exuded by the zooplankton such as chitin, taurine and other complex molecules. Moreover, the high number of genes involved in iron and phosphorus metabolisms in the zooplankton-associated microbiome suggests that this zooplankton-associated bacterial community mediates specific biogeochemical processes (through the proliferation of specific taxa) that are generally underrepresented in the ambient waters.

Organisation(s)
Functional and Evolutionary Ecology
External organisation(s)
Technical University of Denmark (DTU), Royal Netherlands Institute for Sea Research, Utrecht University, Japan Agency for Marine-Earth Science and Technology
Journal
Environmental Microbiology
Volume
20
Pages
492-505
No. of pages
14
ISSN
1462-2912
DOI
https://doi.org/10.1111/1462-2920.13944
Publication date
02-2018
Peer reviewed
Yes
Austrian Fields of Science 2012
Marine biology
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/metagenomic-insights-into-zooplanktonassociated-bacterial-communities(83d4bedd-191e-48eb-8500-22bb3382ed43).html