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Research article - Peer-reviewed, 2021

Soil biotic and abiotic effects on seedling growth exhibit context-dependent interactions: evidence from a multi-country experiment on Pinus contorta invasion

Nuske, Susan J.; Fajardo, Alex; Nunez, Martin A.; Pauchard, Anibal; Wardle, David A.; Nilsson, Marie-Charlotte; Kardol, Paul; Smith, Jane E.; Peltzer, Duane A.; Moyano, Jaime; Gundale, Michael J.

Abstract

The success of invasive plants is influenced by many interacting factors, but evaluating multiple possible mechanisms of invasion success and elucidating the relative importance of abiotic and biotic drivers is challenging, and therefore rarely achieved.We used live, sterile or inoculated soil from different soil origins (native range and introduced range plantation; and invaded plots spanning three different countries) in a fully factorial design to simultaneously examine the influence of soil origin and soil abiotic and biotic factors on the growth of invasive Pinus contorta.Our results displayed significant context dependency in that certain soil abiotic conditions in the introduced ranges (soil nitrogen, phosphorus or carbon content) influenced responses to inoculation treatments.Our findings do not support the enemy release hypothesis or the enhanced mutualism hypothesis, as biota from native and plantation ranges promoted growth similarly. Instead, our results support the missed mutualism hypothesis, as biota from invasive ranges were the least beneficial for seedling growth. Our study provides a novel perspective on how variation in soil abiotic factors can influence plant-soil feedbacks for an invasive tree across broad biogeographical contexts.

Keywords

abiotic; context-dependent; ectomycorrhizas; enhanced mutualism hypothesis; enemy release hypothesis; invasive; missed mutualism hypothesis; plant-soil feedback

Published in

New Phytologist
2021, volume: 232, number: 1, pages: 303-317
Publisher: WILEY

Authors' information

Swedish University of Agricultural Sciences, Department of Forest Ecology and Management
Fajardo, Alex
University of Talca
Nunez, Martin A.
Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET)
Pauchard, Anibal
Universidad de Concepcion
Wardle, David A.
Nanyang Technological University and National Institute of Education (NIE) Singapore
Nilsson, Marie-Charlotte (Nilsson Hegethorn, Marie-Charlotte)
Swedish University of Agricultural Sciences, Department of Forest Ecology and Management
Swedish University of Agricultural Sciences, Department of Forest Ecology and Management
Smith, Jane E.
United States Forest Service
Peltzer, Duane A.
Landcare Research - New Zealand
Moyano, Jaime
Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET)
Swedish University of Agricultural Sciences, Department of Forest Ecology and Management

UKÄ Subject classification

Ecology
Soil Science

Publication Identifiers

DOI: https://doi.org/10.1111/nph.17449

URI (permanent link to this page)

https://res.slu.se/id/publ/112598