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Title: Plant invasion impacts on fungal community structure and function depend on soil warming and nitrogen enrichment

Abstract

The impacts of invasive species on biodiversity may be mitigated or exacerbated by abiotic environmental changes. Invasive plants can restructure soil fungal communities with important implications for native biodiversity and nutrient cycling, yet fungal responses to invasion may depend on numerous anthropogenic stressors. In this study, we experimentally invaded a long-term soil warming and simulated nitrogen deposition experiment with the widespread invasive plant Alliaria petiolata (garlic mustard) and tested the responses of soil fungal communities to invasion, abiotic factors, and their interaction. We focused on the phytotoxic garlic mustard because it suppresses native mycorrhizae across forests of North America. We found that invasion in combination with warming, but not under ambient conditions or elevated nitrogen, significantly reduced soil fungal biomass and ectomycorrhizal relative abundances and increased relative abundances of general soil saprotrophs and fungal genes encoding for hydrolytic enzymes. These results suggest that warming potentially exacerbates fungal responses to plant invasion. Soils collected from uninvaded and invaded plots across eight forests spanning a 4 °C temperature gradient further demonstrated that the magnitude of fungal responses to invasion was positively correlated with mean annual temperature. Our study is one of the first empirical tests to show that the impacts of invasion onmore » fungal communities depends on additional anthropogenic pressures and were greater in concert with warming than under elevated nitrogen or ambient conditions.« less

Authors:
ORCiD logo [1];  [2];  [3];  [4]
  1. ETH Zurich (Switzerland); Univ. of New Hampshire, Durham, NH (United States)
  2. Univ. of Massachusetts, Amherst, MA (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of New Hampshire, Durham, NH (United States)
  4. Univ. of New Hampshire, Durham, NH (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE; National Science Foundation (NSF); USDOD Strategic Environmental Research and Development Program (SERDP)
OSTI Identifier:
1747028
Grant/Contract Number:  
AC05-00OR22725; NRC2326; DEB-1832110; DEB-1456610; DGE-1450271
Resource Type:
Accepted Manuscript
Journal Name:
Oecologia
Additional Journal Information:
Journal Volume: 194; Journal Issue: 4; Journal ID: ISSN 0029-8549
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Arbuscular mycorrhizal fungi; ectomycorrhizal fungi; invasive species; soil warming; nitrogen deposition

Citation Formats

Anthony, M. A., Stinson, K. A., Moore, J. A. M., and Frey, S. D. Plant invasion impacts on fungal community structure and function depend on soil warming and nitrogen enrichment. United States: N. p., 2020. Web. doi:10.1007/s00442-020-04797-4.
Anthony, M. A., Stinson, K. A., Moore, J. A. M., & Frey, S. D. Plant invasion impacts on fungal community structure and function depend on soil warming and nitrogen enrichment. United States. https://doi.org/10.1007/s00442-020-04797-4
Anthony, M. A., Stinson, K. A., Moore, J. A. M., and Frey, S. D. Tue . "Plant invasion impacts on fungal community structure and function depend on soil warming and nitrogen enrichment". United States. https://doi.org/10.1007/s00442-020-04797-4. https://www.osti.gov/servlets/purl/1747028.
@article{osti_1747028,
title = {Plant invasion impacts on fungal community structure and function depend on soil warming and nitrogen enrichment},
author = {Anthony, M. A. and Stinson, K. A. and Moore, J. A. M. and Frey, S. D.},
abstractNote = {The impacts of invasive species on biodiversity may be mitigated or exacerbated by abiotic environmental changes. Invasive plants can restructure soil fungal communities with important implications for native biodiversity and nutrient cycling, yet fungal responses to invasion may depend on numerous anthropogenic stressors. In this study, we experimentally invaded a long-term soil warming and simulated nitrogen deposition experiment with the widespread invasive plant Alliaria petiolata (garlic mustard) and tested the responses of soil fungal communities to invasion, abiotic factors, and their interaction. We focused on the phytotoxic garlic mustard because it suppresses native mycorrhizae across forests of North America. We found that invasion in combination with warming, but not under ambient conditions or elevated nitrogen, significantly reduced soil fungal biomass and ectomycorrhizal relative abundances and increased relative abundances of general soil saprotrophs and fungal genes encoding for hydrolytic enzymes. These results suggest that warming potentially exacerbates fungal responses to plant invasion. Soils collected from uninvaded and invaded plots across eight forests spanning a 4 °C temperature gradient further demonstrated that the magnitude of fungal responses to invasion was positively correlated with mean annual temperature. Our study is one of the first empirical tests to show that the impacts of invasion on fungal communities depends on additional anthropogenic pressures and were greater in concert with warming than under elevated nitrogen or ambient conditions.},
doi = {10.1007/s00442-020-04797-4},
journal = {Oecologia},
number = 4,
volume = 194,
place = {United States},
year = {Tue Nov 03 00:00:00 EST 2020},
month = {Tue Nov 03 00:00:00 EST 2020}
}

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