Spatially resolved assembly, connectivity and structure of particle-associated and free-living bacterial communities in a high Arctic fjord.

ABSTRACT: The assembly processes that underlie the composition and connectivity of free-living (FL) and particle-associated (PA) bacterial communities from surface to deep waters remain little understood. Here, using phylogenetic null modeling, we quantify the relative influence of selective and stochastic mechanisms that assemble FL and PA bacterial communities throughout the water column in a high Arctic fjord. We demonstrate that assembly processes acting on FL and PA bacterial communities are similar in surface waters, but become increasingly distinct in deep waters. As depth increases, the relative influence of homogeneous selection increases for FL but decreases for PA communities. In addition, dispersal limitation and variable selection increase with depth for PA, but not for FL communities,

SUBMITTER: Jain A 

PROVIDER: S-EPMC8536490 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature