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Title: Nutrient foraging by mycorrhizas: From species functional traits to ecosystem processes

Abstract

1. Plant roots and the associated mycorrhizal fungal hyphae often selectively proliferate into patchily distributed soil nutrient hotspots, but interactions between these two components of a mycorrhizal root system are usually ignored or experimentally isolated in nutrient foraging studies. 2. From studies in which both roots and mycorrhizal hyphae had access to nutrient hotspots, we compiled data on root foraging precision (increase in roots in nutrient hotspots relative to outside hotspots) of plant species from different ecosystems, ranging from temperate grasslands to subtropical forests. We found that root for- aging precision across the wide range of plant species was strongly influenced by root morphology and mycorrhizal type. 3. The precision of root nutrient foraging, as a plant functional trait, may coordinate with other root traits that are related to the economics of nutrient acquisition. High foraging precision is expected to associate with the strategy of fast return on the investment in roots, such as low construction cost, high metabolic rate and rapid turnover. 4. Nutrient foraging by mycorrhizal fungi alone may be influenced by functional traits such as hyphal exploration distance, hyphal turnover, and hyphal uptake capacity and efficiency, but such data are limited to a small portion of mycorrhizalmore » fungal species. 5. We propose a conceptual framework in which to simulate nitrogen and phosphorus acquisition from both nutrient hotspots and outside hotspots in mixed-species plant communities. Simulation outputs suggest that plant species with varying root morphology and mycorrhizal type can be adaptive to a range of nutrient heterogeneity. 6. Although there are still knowledge gaps related to nutrient foraging, as well as many unexplored plant and fungal species, we suggest that scaling nutrient foraging from individual plants to communities would advance understanding of plant species interactions and below-ground ecosystem function.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Pennsylvania State Univ., University Park, PA (United States)
  2. Pennsylvania State Univ., University Park, PA (United States); Brigham Young Univ., Provo, UT (United States)
Publication Date:
Research Org.:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; USDOE
Contributing Org.:
National Science Foundation, Penn State University
OSTI Identifier:
1419617
Alternate Identifier(s):
OSTI ID: 1419089
Grant/Contract Number:  
SC0012003; DE‐SC0012003
Resource Type:
Accepted Manuscript
Journal Name:
Functional Ecology
Additional Journal Information:
Journal Volume: 32; Journal Issue: 4; Journal ID: ISSN 0269-8463
Publisher:
British Ecological Society; Wiley
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 54 ENVIRONMENTAL SCIENCES; mycorrhizal fungi; plant and ecosystem functions; root functional traits; soil heterogeneity; species composition

Citation Formats

Chen, Weile, Koide, Roger T., and Eissenstat, David M. Nutrient foraging by mycorrhizas: From species functional traits to ecosystem processes. United States: N. p., 2018. Web. doi:10.1111/1365-2435.13041.
Chen, Weile, Koide, Roger T., & Eissenstat, David M. Nutrient foraging by mycorrhizas: From species functional traits to ecosystem processes. United States. doi:10.1111/1365-2435.13041.
Chen, Weile, Koide, Roger T., and Eissenstat, David M. Tue . "Nutrient foraging by mycorrhizas: From species functional traits to ecosystem processes". United States. doi:10.1111/1365-2435.13041. https://www.osti.gov/servlets/purl/1419617.
@article{osti_1419617,
title = {Nutrient foraging by mycorrhizas: From species functional traits to ecosystem processes},
author = {Chen, Weile and Koide, Roger T. and Eissenstat, David M.},
abstractNote = {1. Plant roots and the associated mycorrhizal fungal hyphae often selectively proliferate into patchily distributed soil nutrient hotspots, but interactions between these two components of a mycorrhizal root system are usually ignored or experimentally isolated in nutrient foraging studies. 2. From studies in which both roots and mycorrhizal hyphae had access to nutrient hotspots, we compiled data on root foraging precision (increase in roots in nutrient hotspots relative to outside hotspots) of plant species from different ecosystems, ranging from temperate grasslands to subtropical forests. We found that root for- aging precision across the wide range of plant species was strongly influenced by root morphology and mycorrhizal type. 3. The precision of root nutrient foraging, as a plant functional trait, may coordinate with other root traits that are related to the economics of nutrient acquisition. High foraging precision is expected to associate with the strategy of fast return on the investment in roots, such as low construction cost, high metabolic rate and rapid turnover. 4. Nutrient foraging by mycorrhizal fungi alone may be influenced by functional traits such as hyphal exploration distance, hyphal turnover, and hyphal uptake capacity and efficiency, but such data are limited to a small portion of mycorrhizal fungal species. 5. We propose a conceptual framework in which to simulate nitrogen and phosphorus acquisition from both nutrient hotspots and outside hotspots in mixed-species plant communities. Simulation outputs suggest that plant species with varying root morphology and mycorrhizal type can be adaptive to a range of nutrient heterogeneity. 6. Although there are still knowledge gaps related to nutrient foraging, as well as many unexplored plant and fungal species, we suggest that scaling nutrient foraging from individual plants to communities would advance understanding of plant species interactions and below-ground ecosystem function.},
doi = {10.1111/1365-2435.13041},
journal = {Functional Ecology},
number = 4,
volume = 32,
place = {United States},
year = {2018},
month = {1}
}

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