Microbial communities across nearshore to offshore coastal transects are primarily shaped by distance and temperature.

Journal Article (Journal Article)

Recent studies have focused on linking marine microbial communities with environmental factors, yet, relatively little is known about the drivers of microbial community patterns across the complex gradients from the nearshore to open ocean. Here, we examine microbial dynamics in 15 five-station transects beginning at the estuarine Piver's Island Coastal Observatory (PICO) time-series site and continuing 87 km across the continental shelf to the oligotrophic waters of the Sargasso Sea. 16S rRNA gene libraries reveal strong clustering by sampling site with distinct nearshore, continental shelf and offshore oceanic communities. Water temperature and distance from shore (which serves as a proxy for gradients in factors such as productivity, terrestrial input and nutrients) both most influence community composition. However, at the phylotype level, modelling shows the distribution of some taxa is linked to temperature, others to distance from shore and some by both factors, highlighting that taxa with distinct environmental preferences underlie apparent clustering by station. Thus, continental margins contain microbial communities that are distinct from those of either the nearshore or the offshore environments and contain mixtures of phylotypes with nearshore or offshore preferences rather than those unique to the shelf environment.

Full Text

Duke Authors

Cited Authors

  • Wang, Z; Juarez, DL; Pan, J-F; Blinebry, SK; Gronniger, J; Clark, JS; Johnson, ZI; Hunt, DE

Published Date

  • October 2019

Published In

Volume / Issue

  • 21 / 10

Start / End Page

  • 3862 - 3872

PubMed ID

  • 31286605

Electronic International Standard Serial Number (EISSN)

  • 1462-2920

International Standard Serial Number (ISSN)

  • 1462-2912

Digital Object Identifier (DOI)

  • 10.1111/1462-2920.14734


  • eng