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Title: Plant selection initiates alternative successional trajectories in the soil microbial community after disturbance

Abstract

Because interactions between plants and microbial organisms can influence species diversity and rates of nutrient cycling, how plants shape microbial communities is fundamental to understanding the structure of ecosystems. Despite this, the spatial and temporal scales over which plants influence microbial communities is poorly understood, particularly whether past abiotic or biotic legacies strongly constrain microbial community development. We examined biogeochemical cycling and microbial community structure in a coastal landscape where historical patterns of vegetation transition after a large fire in 1995 are well known, allowing us to account for past abiotic and biotic conditions. We found that alternative states in microbial community structure and ecosystem processes emerged under different plant species, regardless of past conditions. Greenhouse studies further demonstrated that these differences arise from direct plant selection of microbes, with selection stronger in roots compared with soils, especially for bacteria. Correlation of microbial community structure with seedling growth rates was also stronger for fungi compared to bacteria. Despite these effects, minimal overlap between seedling and field microbial communities indicates that the effects of initial plant selection are not stable, rather plant selection initiated alternative successional trajectories after the fire. Using data from a guild where we have abundant natural historymore » information - ectomycorrhizal fungi - we show that greenhouse communities are dominated by ruderal taxa that are also common in the field after the fire, and that these ruderal fungi strongly alter spatial patterns in plant-soil feedback, enabling invasion and transformation of soils previously occupied by heterospecific plants, thus potentially acting as keystone mutualists.« less

Authors:
 [1];  [1];  [1];  [1];  [2];  [1]
  1. Stanford Univ., CA (United States)
  2. Univ. of Wisconsin, Madison, WI (United States)
Publication Date:
Research Org.:
Stanford Univ., CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1509036
Alternate Identifier(s):
OSTI ID: 1514765
Grant/Contract Number:  
SC0016097
Resource Type:
Accepted Manuscript
Journal Name:
Ecological Monographs
Additional Journal Information:
Related Information: NCBI Project Number PRJNA526540. Dryad Digital Repository at https://doi.org/10.5061/dryad.jd71434; Journal ID: ISSN 0012-9615
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Alternative Stable States; Dispersal; Fire; Mutualism; Pinus muricata; Plant Soil Feedbacks; Suillus

Citation Formats

Duhamel, Marie, Wan, Joe, Bogar, Laura M., Segnitz, R. Max, Duncritts, Nora C., and Peay, Kabir G. Plant selection initiates alternative successional trajectories in the soil microbial community after disturbance. United States: N. p., 2019. Web. doi:10.1002/ecm.1367.
Duhamel, Marie, Wan, Joe, Bogar, Laura M., Segnitz, R. Max, Duncritts, Nora C., & Peay, Kabir G. Plant selection initiates alternative successional trajectories in the soil microbial community after disturbance. United States. doi:10.1002/ecm.1367.
Duhamel, Marie, Wan, Joe, Bogar, Laura M., Segnitz, R. Max, Duncritts, Nora C., and Peay, Kabir G. Fri . "Plant selection initiates alternative successional trajectories in the soil microbial community after disturbance". United States. doi:10.1002/ecm.1367.
@article{osti_1509036,
title = {Plant selection initiates alternative successional trajectories in the soil microbial community after disturbance},
author = {Duhamel, Marie and Wan, Joe and Bogar, Laura M. and Segnitz, R. Max and Duncritts, Nora C. and Peay, Kabir G.},
abstractNote = {Because interactions between plants and microbial organisms can influence species diversity and rates of nutrient cycling, how plants shape microbial communities is fundamental to understanding the structure of ecosystems. Despite this, the spatial and temporal scales over which plants influence microbial communities is poorly understood, particularly whether past abiotic or biotic legacies strongly constrain microbial community development. We examined biogeochemical cycling and microbial community structure in a coastal landscape where historical patterns of vegetation transition after a large fire in 1995 are well known, allowing us to account for past abiotic and biotic conditions. We found that alternative states in microbial community structure and ecosystem processes emerged under different plant species, regardless of past conditions. Greenhouse studies further demonstrated that these differences arise from direct plant selection of microbes, with selection stronger in roots compared with soils, especially for bacteria. Correlation of microbial community structure with seedling growth rates was also stronger for fungi compared to bacteria. Despite these effects, minimal overlap between seedling and field microbial communities indicates that the effects of initial plant selection are not stable, rather plant selection initiated alternative successional trajectories after the fire. Using data from a guild where we have abundant natural history information - ectomycorrhizal fungi - we show that greenhouse communities are dominated by ruderal taxa that are also common in the field after the fire, and that these ruderal fungi strongly alter spatial patterns in plant-soil feedback, enabling invasion and transformation of soils previously occupied by heterospecific plants, thus potentially acting as keystone mutualists.},
doi = {10.1002/ecm.1367},
journal = {Ecological Monographs},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {4}
}

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This content will become publicly available on April 12, 2020
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