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Title: Microbial diversity in an intensively managed landscape is structured by landscape connectivity

Journal Article · · FEMS Microbiology Ecology (Online)
 [1];  [1];  [2];  [1];  [2];  [3];  [1];  [1];  [3];  [4];  [2];  [1];  [1]
  1. Northwestern Univ., Evanston, IL (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States); Univ. of Chicago, Chicago, IL (United States)
  3. Univ. of Illinois at Urbana-Champaign, Champaign, IL (United States)
  4. Loyola Univ. Chicago, Chicago, IL (United States)
+ Show Author Affiliations

Intensively managed land increases the rate of nutrient and particle transport within a basin, but the impact of these changes on microbial community assembly patterns at the basin scale is not yet understood. The objective of this study was to investigate how landscape connectivity and dispersal impacts microbial diversity in an agricultural-dominated watershed. We characterized soil, sediment and water microbial communities along the Upper Sangamon River basin in Illinois-a 3600 km2 watershed strongly influenced by human activity, especially landscape modification and extensive fertilization for agriculture. We employed statistical and network analyses to reveal the microbial community structure and interactions in the critical zone (water, soil and sediment media). Using a Bayesian source tracking approach, we predicted microbial community connectivity within and between the environments. We identified strong connectivity within environments (up to 85.4 ± 13.3% of sequences in downstream water samples sourced from upstream samples, and 44.7 ± 26.6% in soil and sediment samples), but negligible connectivity across environments, which indicates that microbial dispersal was successful within but not between environments. Species sorting based on sample media type and environmental parameters was the dominant driver of community dissimilarity. Lastly, we constructed operational taxonomic unit association networks for each environment and identified a number of co-occurrence relationships that were shared between habitats, suggesting that these are likely to be ecologically significant.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
Argonne National Laboratory; USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1474145
Journal Information:
FEMS Microbiology Ecology (Online), Vol. 93, Issue 10; ISSN 1574-6941
Publisher:
Federation of European Microbiological SocietiesCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

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Cited By (6)

Oyster microbial communities and implications for chalky deposit formation journal March 2018
Exploring co-occurrence patterns between organic micropollutants and bacterial community structure in a mixed-use watershed journal January 2019
Soil hydrology drives ecological niche differentiation in a native prairie microbiome journal October 2019
Connecting through space and time: catchment‐scale distributions of bacteria in soil, stream water and sediment journal August 2019
Metagenomic Approaches for Understanding New Concepts in Microbial Science journal August 2018
Characterization of a nifH-Harboring Bacterial Community in the Soil-Limited Gotjawal Forest journal August 2019

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Related Subjects

59 BASIC BIOLOGICAL SCIENCES
community assembly
dispersal
land use
landscape connectivity