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Assembly and Tracking of Microbial Community Development within a Microwell Array Platform
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Microbial community assembly in a multi-layer dendritic metacommunity.

Nathan I Wisnoski1, Jay T Lennon2

  • 1Department of Biology, Indiana University, Bloomington, IN, USA. wisnoski@indiana.edu.

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|October 11, 2020
PubMed
Summary
This summary is machine-generated.

Vertical habitat structure influences bacterial community assembly in mountain streams. Planktonic and benthic habitats show distinct patterns driven by selection and dispersal across spatial scales and stream regions.

Keywords:
Community assemblyDendritic networkMetacommunityMicrobial ecologyStream

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Area of Science:

  • Ecology
  • Microbial Ecology
  • Metacommunity Ecology

Background:

  • Metacommunity ecology aims to understand local and regional processes shaping communities.
  • Dendritic ecological networks, with branching patterns and directional flow, can modify these processes.
  • Vertical habitat structure (planktonic vs. benthic) may add another layer of complexity to community assembly in these networks.

Purpose of the Study:

  • To investigate bacterial metacommunity assembly in a dendritic stream network.
  • To compare community assembly between planktonic and benthic habitats.
  • To assess how assembly processes vary across spatial scales and between headwater and downstream regions.

Main Methods:

  • Analysis of bacterial metacommunity in a fifth-order mountain stream network.
  • Application of taxonomic and phylogenetic null modeling.
  • Comparison of community assembly patterns between planktonic and benthic habitats, spatial scales, and stream regions.

Main Results:

  • Habitat-specific spatial patterns of bacterial community assembly were observed.
  • Variable selection and local dispersal limitation influenced planktonic and benthic communities.
  • Planktonic communities exhibited scale-dependent assembly (homogeneous to variable selection), while benthic communities were less scale-dependent.
  • Headwaters were structured by variable selection, whereas downstream communities, particularly in sediments, were dominated by homogeneous selection.

Conclusions:

  • Vertical habitat structure plays a significant role in the scale-dependent assembly of dendritic metacommunities.
  • The interplay between habitat type, spatial scale, and stream position (headwater vs. downstream) determines the dominant ecological processes structuring microbial communities.