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Title: Plant-mycorrhizal interactions mediate plant community coexistence by altering resource demand

Abstract

As the diversity of plants increases in an ecosystem, so does resource competition for soil nutrients, a process that mycorrhizal fungi can mediate. The influence of mycorrhizal fungi on plant biodiversity likely depends on the strength of the symbiosis between the plant and fungi, the differential plant growth responses to mycorrhizal inoculation, and the transfer rate of nutrients from the fungus to plant. However, our current understanding of how nutrient- plant-mycorrhizal interactions influence plant coexistence is conceptual and thus lacks a uni- fied quantitative framework. To quantify the conditions of plant coexistence mediated by mycorrhizal fungi, we developed a mechanistic resource competition model that explicitly included plant-mycorrhizal symbioses. We found that plant-mycorrhizal interactions shape plant coexistence patterns by creating a tradeoff in resource competition. Especially, a tradeoff in resource competition was caused by differential payback in the carbon resources that plants invested in the fungal symbiosis and/or by the stoichiometric constraints on plants that required additional, less-beneficial, resources to sustain growth. Our results suggested that resource availability and the variation in plant-mycorrhizal interactions act in concert to drive plant coexistence patterns. With this being said and applying our framework, future empirical studies should investigate plant-mycorrhizal interactions under multiple levels ofmore » resource availability.« less

Authors:
 [1];  [2];  [3];  [4]
  1. Nanjing Forestry Univ., Nanjing (China); Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Banaras Hindu Univ., Varanasi (India)
  4. Univ. of Tennessee, Knoxville, TN (United States); Univ. of Copenhagen, Copenhagen (Denmark)
Publication Date:
Research Org.:
Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1501391
Alternate Identifier(s):
OSTI ID: 1400813
Grant/Contract Number:  
SC0010562
Resource Type:
Accepted Manuscript
Journal Name:
Ecology
Additional Journal Information:
Journal Volume: 98; Journal Issue: 1; Journal ID: ISSN 0012-9658
Publisher:
Ecological Society of America (ESA)
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; coexistence; mycorrhizae; resource ratio theory; resource competition; soil; plant-soil feedback; R* model

Citation Formats

Jiang, Jiang, Moore, Jessica A. M., Priyadarshi, Anupam, and Classen, Aimée T. Plant-mycorrhizal interactions mediate plant community coexistence by altering resource demand. United States: N. p., 2016. Web. doi:10.1002/ecy.1630.
Jiang, Jiang, Moore, Jessica A. M., Priyadarshi, Anupam, & Classen, Aimée T. Plant-mycorrhizal interactions mediate plant community coexistence by altering resource demand. United States. https://doi.org/10.1002/ecy.1630
Jiang, Jiang, Moore, Jessica A. M., Priyadarshi, Anupam, and Classen, Aimée T. Wed . "Plant-mycorrhizal interactions mediate plant community coexistence by altering resource demand". United States. https://doi.org/10.1002/ecy.1630. https://www.osti.gov/servlets/purl/1501391.
@article{osti_1501391,
title = {Plant-mycorrhizal interactions mediate plant community coexistence by altering resource demand},
author = {Jiang, Jiang and Moore, Jessica A. M. and Priyadarshi, Anupam and Classen, Aimée T.},
abstractNote = {As the diversity of plants increases in an ecosystem, so does resource competition for soil nutrients, a process that mycorrhizal fungi can mediate. The influence of mycorrhizal fungi on plant biodiversity likely depends on the strength of the symbiosis between the plant and fungi, the differential plant growth responses to mycorrhizal inoculation, and the transfer rate of nutrients from the fungus to plant. However, our current understanding of how nutrient- plant-mycorrhizal interactions influence plant coexistence is conceptual and thus lacks a uni- fied quantitative framework. To quantify the conditions of plant coexistence mediated by mycorrhizal fungi, we developed a mechanistic resource competition model that explicitly included plant-mycorrhizal symbioses. We found that plant-mycorrhizal interactions shape plant coexistence patterns by creating a tradeoff in resource competition. Especially, a tradeoff in resource competition was caused by differential payback in the carbon resources that plants invested in the fungal symbiosis and/or by the stoichiometric constraints on plants that required additional, less-beneficial, resources to sustain growth. Our results suggested that resource availability and the variation in plant-mycorrhizal interactions act in concert to drive plant coexistence patterns. With this being said and applying our framework, future empirical studies should investigate plant-mycorrhizal interactions under multiple levels of resource availability.},
doi = {10.1002/ecy.1630},
journal = {Ecology},
number = 1,
volume = 98,
place = {United States},
year = {Wed Oct 26 00:00:00 EDT 2016},
month = {Wed Oct 26 00:00:00 EDT 2016}
}

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