Availability of soil mutualists may not limit non-native Acacia invasion but could increase their impact on native soil communities

Article


Wandrag, Elizabeth M., Birnbaum, Christina, Klock, Metha M., Barrett, Luke G. and Thrall, Peter H.. 2020. "Availability of soil mutualists may not limit non-native Acacia invasion but could increase their impact on native soil communities ." Journal of Applied Ecology. 57 (4), pp. 786-793. https://doi.org/10.1111/1365-2664.13577
Article Title

Availability of soil mutualists may not limit non-native Acacia invasion but could increase their impact on native soil communities

ERA Journal ID3267
Article CategoryArticle
AuthorsWandrag, Elizabeth M., Birnbaum, Christina, Klock, Metha M., Barrett, Luke G. and Thrall, Peter H.
Journal TitleJournal of Applied Ecology
Journal Citation57 (4), pp. 786-793
Number of Pages8
YearApr 2020
PublisherJohn Wiley & Sons
Place of Publicationhttps://besjournals.onlinelibrary.wiley.com/doi/10.1111/1365-2664.13577
ISSN0021-8901
1365-2664
Digital Object Identifier (DOI)https://doi.org/10.1111/1365-2664.13577
Web Address (URL)https://United Kingdom
Abstract

1. The availability of compatible mutualistic soil microbes could influence the invasion success of non-native plant species. Specifically, there may be spatial variation in the distribution of compatible microbes, and species-specific variation in plant host ability to associate with available microbes. Although either or both factors could promote or limit invasion, the scale over which most studies are conducted makes it difficult to examine these two possibilities simultaneously. However, this is critical to identifying a role of soil microbes in invasion.

2. A series of recent research projects focused on interactions between Australian Acacia and nitrogen-fixing bacteria (rhizobia) at multiple spatial scales, from the local to the inter-continental, has allowed us to evaluate this question. Collectively, this research reveals that nodulation, performance and rhizobial community composition are all broadly similar across spatial scales and differentially invasive species.

3. Synthesis and applications. We argue that current research provides convincing evidence that interactions with rhizobia do not determine invasion success in Acacia, but instead highlights key knowledge gaps that remain unfilled. Importantly, the ease with which non-native Acacia species form mutualistic associations with rhizobia, regardless of invasive status, highlights the critical need to understand the impacts of all non-native Acacia on native soil communities.

Keywordsbiological invasion; invasional meltdown; mutualism; nitrogen-fixation; plant-soil feedback; symbiosis; wattles
ANZSRC Field of Research 2020410202. Biosecurity science and invasive species ecology
310703. Microbial ecology
310308. Terrestrial ecology
Public Notes

File reproduced in accordance with the copyright policy of the publisher/author.

Byline AffiliationsUniversity of New England
University of Canberra
Deakin University
San Jose State University, United States
Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia
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