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Li Y, Xu X. No evidence that modification of soil microbiota by woody invader facilitates subsequent invasion by herbaceous species. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2024; 34:e2807. [PMID: 36691856 DOI: 10.1002/eap.2807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 11/16/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
Many terrestrial ecosystems are co-invaded by multiple exotic species. The "invasional meltdown" hypothesis predicts that an initial invasive species will facilitate secondary invasions. In the plant kingdom, the potential underlying mechanisms of this hypothesis may be that modification of the soil properties by the initial invaders benefits for the subsequent exotic species invasion. In this study, we analyzed the composition of soil microbial communities and soil chemical properties from sites invaded by woody Rhus typhina, as well as uninvaded sites, to assess the impact of R. typhina invasion. Furthermore, we conducted a greenhouse experiment with multiple native-invasive pairs of herbaceous species to test whether R. typhina invasion facilitates subsequent exotic herb invasion. Our results showed that R. typhina invasion significantly altered the composition of soil fungal communities, especially pathogenic, endophytic, and arbuscular mycorrhizal fungi. However, this change in microbial composition led to neither direction nor magnitude changes in negative plant-soil feedback effects on both native and invasive species. This indicates that initial R. typhina invasion does not facilitate subsequent herb invasion, which does not support the "invasional meltdown" hypothesis. Additionally, R. typhina invasion significantly decreased soil total nitrogen and organic carbon contents, which may explain the significantly lower biomass of herbaceous roots grown in invaded soils compared with uninvaded soils. Alternately, although invasive herb growth was significantly more inhibited by soil microbiota compared with native herb growth, such inhibition cannot completely eliminate the risk of exotic herb invasion because of their innate growth advantages. Therefore, microbial biocontrol agents for plant invasion management should be combined with another approach to suppress the innate growth advantages of exotic species.
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Affiliation(s)
- Yan Li
- Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
| | - Xingliang Xu
- Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
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Zhu W, Lu X, Hong C, Hong L, Ding J, Zhou W, Zhu F, Yao Y. Pathogen resistance in soils associated with bacteriome network reconstruction through reductive soil disinfestation. Appl Microbiol Biotechnol 2023; 107:5829-5842. [PMID: 37450017 DOI: 10.1007/s00253-023-12676-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 06/14/2023] [Accepted: 06/18/2023] [Indexed: 07/18/2023]
Abstract
Reductive soil disinfestation (RSD) is an effective bioremediation technique to restructure the soil microbial community and eliminate soilborne phytopathogens. Yet we still lack a comprehensive understanding of the keystone taxa involved and their roles in ecosystem functioning in degraded soils treated by RSD. In this study, the bacteriome network structure in RSD-treated soil and the subsequent cultivation process were explored. As a result, bacterial communities in RSD-treated soil developed more complex topologies and stable co-occurrence patterns. The richness and diversity of keystone taxa were higher in the RSD group (module hub: 0.57%; connector: 23.98%) than in the Control group (module hub: 0.16%; connector: 19.34%). The restoration of keystone taxa in RSD-treated soil was significantly (P < 0.01) correlated with soil pH, total organic carbon, and total nitrogen. Moreover, a strong negative correlation (r = -0.712; P < 0.01) was found between keystone taxa richness and Fusarium abundance. Our results suggest that keystone taxa involved in the RSD network structure are capable of maintaining a flexible generalist mode of metabolism, namely with respect to nitrogen fixation, methylotrophy, and methanotrophy. Furthermore, distinct network modules composed by numerous anti-pathogen agents were formed in RSD-treated soil; i.e., the genera Hydrogenispora, Azotobacter, Sphingomonas, and Clostridium_8 under the soil treatment stage, and the genera Anaerolinea and Pseudarthrobacter under the plant cultivation stage. The study provides novel insights into the association between fungistasis and keystone or sensitive taxa in RSD-treated soil, with significant implications for comprehending the mechanisms of RSD. KEY POINTS: • RSD enhanced bacteriome network stability and restored keystone taxa. • Keystone taxa richness was negatively correlated with Fusarium abundance. • Distinct sensitive OTUs and modules were formed in RSD soil.
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Affiliation(s)
- Weijing Zhu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Xiaolin Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Chunlai Hong
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Leidong Hong
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Jian Ding
- Zhejiang Agricultural Technical Extension Center, Hangzhou, 310020, China
| | - Wenlin Zhou
- Institute of Sericulture and Tea, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Fengxiang Zhu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Yanlai Yao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.
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Zhu C, Wang Z, Deane DC, Luo W, Chen Y, Cao Y, Lin Y, Zhang M. The Effects of Species Abundance, Spatial Distribution, and Phylogeny on a Plant-Ectomycorrhizal Fungal Network. FRONTIERS IN PLANT SCIENCE 2022; 13:784778. [PMID: 35665141 PMCID: PMC9158544 DOI: 10.3389/fpls.2022.784778] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 04/19/2022] [Indexed: 06/15/2023]
Abstract
Plant and root fungal interactions are among the most important belowground ecological interactions, however, the mechanisms underlying pairwise interactions and network patterns of rhizosphere fungi and host plants remain unknown. We tested whether neutral process or spatial constraints individually or jointly best explained quantitative plant-ectomycorrhizal fungal network assembly in a subtropical forest in southern China. Results showed that the observed plant-ectomycorrhizal fungal network had low connectivity, high interaction evenness, and an intermediate level of specialization, with nestedness and modularity both greater than random expectation. Incorporating information on the relative abundance and spatial overlap of plants and fungi well predicted network nestedness and connectance, but not necessarily explained other network metrics such as specificity. Spatial overlap better predicted pairwise species interactions of plants and ectomycorrhizal fungi than species abundance or a combination of species abundance and spatial overlap. There was a significant phylogenetic signal on species degree and interaction strength for ectomycorrhizal fungal but not for plant species. Our study suggests that neutral processes (species abundance matching) and niche/dispersal-related processes (implied by spatial overlap and phylogeny) jointly drive the shaping of a plant-ectomycorrhizal fungal network.
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Affiliation(s)
- Chunchao Zhu
- Department of Bioengineering, Zhuhai Campus of Zunyi Medical University, Zhuhai, China
| | - Zihui Wang
- Département des Sciences Biologiques, Université du Québec à Montréal, Montréal, QC, Canada
| | - David C. Deane
- Centre for Future Landscapes and Department of Environment and Genetics, La Trobe University, Bundoora, VIC, Australia
| | - Wenqi Luo
- Department of Ecology, Sun Yat-sen University, Guangzhou, China
| | - Yongfa Chen
- Department of Ecology, Sun Yat-sen University, Guangzhou, China
| | - Yongjun Cao
- Department of Bioengineering, Zhuhai Campus of Zunyi Medical University, Zhuhai, China
| | - Yumiao Lin
- Department of Bioengineering, Zhuhai Campus of Zunyi Medical University, Zhuhai, China
| | - Minhua Zhang
- ECNU-Alberta Joint Lab for Biodiversity Study, Zhejiang Tiantong National Station for Forest Ecosystems, East China Normal University, Shanghai, China
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Hirsch H, Richardson DM, Le Roux JJ. Introduction to the special issue: Tree invasions: towards a better understanding of their complex evolutionary dynamics. AOB PLANTS 2017; 9:plx014. [PMID: 28533897 PMCID: PMC5420828 DOI: 10.1093/aobpla/plx014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 04/03/2017] [Indexed: 06/07/2023]
Abstract
Many invasive plants show evidence of trait-based evolutionary change, but these remain largely unexplored for invasive trees. The increasing number of invasive trees and their tremendous impacts worldwide, however, illustrates the urgent need to bridge this knowledge gap to apply efficient management. Consequently, an interdisciplinary workshop, held in 2015 at Stellenbosch University in Stellenbosch, South Africa, brought together international researchers to discuss our understanding of evolutionary dynamics in invasive trees. The main outcome of this workshop is this Special Issue of AoB PLANTS. The collection of papers in this issue has helped to identify and assess the evolutionary mechanisms that are likely to influence tree invasions. It also facilitated expansion of the unified framework for biological invasions to incorporate key evolutionary processes. The papers cover a wide range of evolutionary mechanisms in tree genomes (adaptation), epigenomes (phenotypic plasticity) and their second genomes (mutualists), and show how such mechanisms can impact tree invasion processes and management. The special issue provides a comprehensive overview of the factors that promote and mitigate the invasive success of tree species in many parts of the world. It also shows that incorporating evolutionary concepts is crucial for understanding the complex drivers of tree invasions and has much potential to improve management. The contributions of the special issue also highlight many priorities for further work in the face of ever-increasing tree invasions; the complexity of this research needs calls for expanded interdisciplinary research collaborations.
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Affiliation(s)
- Heidi Hirsch
- Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Matieland 7602, South Africa
| | - David M. Richardson
- Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Matieland 7602, South Africa
| | - Johannes J. Le Roux
- Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Matieland 7602, South Africa
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Zenni RD, Dickie IA, Wingfield MJ, Hirsch H, Crous CJ, Meyerson LA, Burgess TI, Zimmermann TG, Klock MM, Siemann E, Erfmeier A, Aragon R, Montti L, Le Roux JJ. Evolutionary dynamics of tree invasions: complementing the unified framework for biological invasions. AOB PLANTS 2016; 9:plw085. [PMID: 28039118 PMCID: PMC5391705 DOI: 10.1093/aobpla/plw085] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 08/09/2016] [Accepted: 11/16/2016] [Indexed: 05/24/2023]
Abstract
Evolutionary processes greatly impact the outcomes of biological invasions. An extensive body of research suggests that invasive populations often undergo phenotypic and ecological divergence from their native sources. Evolution also operates at different and distinct stages during the invasion process. Thus, it is important to incorporate evolutionary change into frameworks of biological invasions because it allows us to conceptualize how these processes may facilitate or hinder invasion success. Here, we review such processes, with an emphasis on tree invasions, and place them in the context of the unified framework for biological invasions. The processes and mechanisms described are pre-introduction evolutionary history, sampling effect, founder effect, genotype-by-environment interactions, admixture, hybridization, polyploidization, rapid evolution, epigenetics, and second-genomes. For the last, we propose that co-evolved symbionts, both beneficial and harmful, which are closely physiologically associated with invasive species, contain critical genetic traits that affect the evolutionary dynamics of biological invasions. By understanding the mechanisms underlying invasion success, researchers will be better equipped to predict, understand, and manage biological invasions.
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Affiliation(s)
- Rafael Dudeque Zenni
- Setor de Ecologia, Departamento de Biologia, Universidade Federal de Lavras, Lavras, MG, Brazil. Programa de Pós-Graduação em Ecologia Aplicada, Caixa Postal 3037, CEP 37200-000 - Lavras-MG - Brazil
| | - Ian A Dickie
- Bio-protection Research Centre, Lincoln University, Lincoln 7647, New Zealand
| | - Michael J Wingfield
- Forestry & Agricultural Biotechnology Institute, University of Pretoria, Pretoria, South Africa
| | - Heidi Hirsch
- Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
| | - Casparus J Crous
- Forestry & Agricultural Biotechnology Institute, University of Pretoria, Pretoria, South Africa
- Centre for Ecology, Evolution and Environmental Changes, Faculty of Sciences, University of Lisbon, Campo Grande, 1749-016, Lisbon, Portugal
| | - Laura A Meyerson
- Department of Natural Resources Science, University of Rhode Island, Kingston, RI, USA
| | - Treena I Burgess
- Forestry & Agricultural Biotechnology Institute, University of Pretoria, Pretoria, South Africa
- School of Veterinary and Life Sciences, Murdoch University, Murdoch, 6150 Australia
| | - Thalita G Zimmermann
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Metha M Klock
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana, USA
| | - Evan Siemann
- Biosciences Department, Rice University, Houston, TX, USA
| | | | - Roxana Aragon
- Instituto de Ecologia Regional, Facultad de Ciencias Naturales, Universidad Nacional de Tucumán, CONICET. Tucuman, Argentina
| | - Lia Montti
- Instituto de Ecologia Regional, Facultad de Ciencias Naturales, Universidad Nacional de Tucumán, CONICET. Tucuman, Argentina
| | - Johannes J Le Roux
- Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
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