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Claassens R, Venter SN, Beukes CW, Stępkowski T, Chan WY, Steenkamp ET. Bradyrhizobium xenonodulans sp. nov. isolated from nodules of Australian Acacia species invasive to South Africa. Syst Appl Microbiol 2023; 46:126452. [PMID: 37634485 DOI: 10.1016/j.syapm.2023.126452] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 08/08/2023] [Accepted: 08/10/2023] [Indexed: 08/29/2023]
Abstract
A genealogical concordance approach was used to delineate strains isolated from Acacia dealbata and Acacia mearnsii root nodules in South Africa. These isolates form part of Bradyrhizobium based on 16S rRNA sequence similarity. Phylogenetic analysis of six housekeeping genes (atpD, dnaK, glnII, gyrB, recA and rpoB) confirmed that these isolates represent a novel species, while pairwise average nucleotide identity (ANIb) calculations with the closest type strains (B. cosmicum 58S1T, B. betae PL7HG1T, B. ganzhouense CCBAU 51670 T, B. cytisi CTAW11T and B. rifense CTAW71T) resulted in values well below 95-96%. We further performed phenotypic tests which revealed that there are high levels of intraspecies variation, while an additional analysis of the nodA and nifD loci indicated that the symbiotic loci of the strains are closely related to those of Bradyrhizobium isolates with an Australian origin. Strain 14ABT (=LMG 31415 T = SARCC-753 T) is designated as the type strain of the novel species for which we propose the name Bradyrhizobium xenonodulans sp. nov.
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Affiliation(s)
- Ricu Claassens
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, Gauteng, South Africa
| | - Stephanus N Venter
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, Gauteng, South Africa
| | | | - Tomasz Stępkowski
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences (SGGW), Poland
| | - Wai Y Chan
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, Gauteng, South Africa; Right to Care, Centurion, Gauteng, South Africa
| | - Emma T Steenkamp
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, Gauteng, South Africa.
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Hui C, Pyšek P, Richardson DM. Disentangling the relationships among abundance, invasiveness and invasibility in trait space. NPJ BIODIVERSITY 2023; 2:13. [PMID: 39242656 PMCID: PMC11332024 DOI: 10.1038/s44185-023-00019-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 05/26/2023] [Indexed: 09/09/2024]
Abstract
Identifying conditions and traits that allow an introduced species to grow and spread, from being initially rare to becoming abundant (defined as invasiveness), is the crux of invasion ecology. Invasiveness and abundance are related but not the same, and we need to differentiate these concepts. Predicting both species abundance and invasiveness and their relationship in an invaded community is highly contextual, being contingent on the community trait profile and its invasibility. We operationalised a three-pronged invasion framework that considers traits, environmental context, and propagule pressure. Specifically, we measure the invasiveness of an alien species by combining three components (performance reflecting environmental suitability, product of species richness and the covariance between interaction strength and species abundance, and community-level interaction pressure); the expected population growth rate of alien species simply reflects the total effect of propagule pressure and the product of their population size and invasiveness. The invasibility of a community reflects the size of opportunity niches (the integral of positive invasiveness in the trait space) under the given abiotic conditions of the environment. Both species abundance and the surface of invasiveness over the trait space can be dynamic and variable. Whether an introduced species with functional traits similar to those of an abundant species in the community exhibits high or low invasiveness depends largely on the kernel functions of performance and interaction strength with respect to traits and environmental conditions. Knowledge of the covariance between interaction strength and species abundance and these kernel functions, thus, holds the key to accurate prediction of invasion dynamics.
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Affiliation(s)
- Cang Hui
- Centre for Invasion Biology, Department of Mathematical Sciences, Stellenbosch University, Stellenbosch, South Africa.
- Biodiversity Informatics Unit, African Institute for Mathematical Sciences, Muizenberg, South Africa.
- National Institute for Theoretical and Computational Sciences (NITheCS), Stellenbosch University, Stellenbosch, South Africa.
| | - Petr Pyšek
- Institute of Botany, Czech Academy of Sciences, Prague, Czech Republic
- Department of Ecology, Charles University, Prague, Czech Republic
| | - David M Richardson
- Institute of Botany, Czech Academy of Sciences, Prague, Czech Republic
- Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Stellenbosch, South Africa
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3
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Mott AW, Krueger-Hadfield SA, Blakeslee AMH, Fowler AE. Native tube-building polychaete prefers to anchor non-native alga over other macrophytes. Oecologia 2022; 198:967-980. [PMID: 35438318 DOI: 10.1007/s00442-022-05164-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 04/03/2022] [Indexed: 11/29/2022]
Abstract
Novel facultative mutualisms that develop between native and non-native ecosystem engineers can lead to the retention of the non-native partner. In some cases, behavior plays an additional, but less understood, role in the development and persistence of mutualisms. In soft-sediment marine habitats along the western Atlantic, the native decorator worm Diopatra cuprea anchors the non-native red alga Gracilaria vermiculophylla to its tube cap in a mutualism. To understand whether the worm's usage of G. vermiculophylla could represent a preference, we first surveyed the species composition of macrophytes affixed to worm tube caps at three sites in coastal Virginia, USA using transect and quadrat sampling. These unmanipulated field surveys supported previous work revealing variable, but often high frequencies (31-98%) of D. cuprea decoration with G. vermiculophylla. We next used field manipulations and controlled laboratory experiments to test the consistency of individual D. cuprea decoration with G. vermiculophylla versus three common macrophytes (Ulva sp., Agardhiella sp., and Spartina alterniflora) found in our field surveys. Twenty-four hours after removing the worm's tube cap in the field, D. cuprea decoration was dominated by both G. vermiculophylla (39.6%) and S. alterniflora (25.9%). When provided a choice of macrophytes in the laboratory, individual D. cuprea consistently decorated with G. vermiculophylla (58.7%) over the other macrophytes, showing a preference for the non-native macrophyte. Our study suggests that preference can drive strong and steadfast interactions between native and non-native organisms, facilitating the latter's persistence and spread, change available habitat, and alter community interactions.
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Affiliation(s)
- Alexander W Mott
- Department of Environmental Science and Policy, George Mason University, Fairfax, VA, USA.
| | | | | | - Amy E Fowler
- Department of Environmental Science and Policy, George Mason University, Fairfax, VA, USA
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4
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Guisande‐Collazo A, González L, Souza‐Alonso P. Origin makes a difference: Alternative responses of an AM-dependent plant to mycorrhizal inoculum from invaded and native soils under abiotic stress. PLANT BIOLOGY (STUTTGART, GERMANY) 2022; 24:417-429. [PMID: 35220660 PMCID: PMC9303955 DOI: 10.1111/plb.13402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 01/21/2022] [Indexed: 05/30/2023]
Abstract
The presence of invasive alien plants (IAPs) alters the composition of soil arbuscular mycorrhizal (AM) fungal communities. Although fundamental for plant development, plant responses to AM from invaded soils have not been widely explored, especially under environmental stress. We compared plant growth, P accumulation, root colonization and the photosynthetic responses of the native AM-dependent Plantago lanceolata growing in contact with AM fungi from communities invaded by Acacia dealbata Link (AMinv) or non-invaded communities (AMnat) exposed to water and light restriction (shade). Under optimal growing conditions, plants in contact with AMnat produced higher leaf biomass and accumulated more P. However, plant responses to different AM inocula varied as the level of stress increased. Inoculation with AMinv promoted plant growth and root length under light restriction. When plants grew in contact with AMnat under drought, leaf P increased under severe water restriction, and leaf and root P increased under intermediate water irrigation. Growing in contact with the AMnat inoculum promoted root P content in both full light and light restriction. Colonization rates of P. lanceolata roots were comparable between treatments, and plants maintained photosynthetic activity within similar ranges, regardless of the level of stress applied. Our results suggest that origin of the inoculum (native soils versus invaded soils) did not affect the ability of AM species therein to establish effective mutualistic associations with P. lanceolata roots but did influence plant responses depending on the type and level of the abiotic stress.
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Affiliation(s)
- A. Guisande‐Collazo
- Plant Ecophysiology GroupDepartment of Plant Biology and Soil ScienceUniversity of VigoVigoSpain
- CITACAAgri‐Food Research and Transfer ClusterCampus da AugaUniversity of VigoOurenseSpain
| | - L. González
- Plant Ecophysiology GroupDepartment of Plant Biology and Soil ScienceUniversity of VigoVigoSpain
- CITACAAgri‐Food Research and Transfer ClusterCampus da AugaUniversity of VigoOurenseSpain
| | - P. Souza‐Alonso
- Department of Soil Science and Agricultural ChemistryUniversity of Santiago de CompostelaLugoSpain
- Department of Environmental ChemistryUniversidad Católica de Concepción UCSCConcepciónChile
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Warrington S, Ellis AG, Keet JH, Le Roux JJ. How does familiarity in rhizobial interactions impact the performance of invasive and native legumes? NEOBIOTA 2022. [DOI: 10.3897/neobiota.72.79620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Mutualisms can be disrupted when non-native plants are introduced into novel environments, potentially impacting their establishment success. Introduced species can reassemble mutualisms by forming novel associations with resident biota or by maintaining familiar associations when they are co-introduced with their mutualists. Invasive Australian Acacia species in South Africa have formed nitrogen-fixing rhizobium mutualisms using both pathways.
Here we examined the contributions of novel vs familiar rhizobial associations to the performance of Acacia saligna across different soils within South Africa’s Core Cape Subregion (CCR), and the concomitant impacts of exotic rhizobia on the endemic legume, Psoralea pinnata. We grew each legume with and without Australian Bradyrhizobium strains across various CCR soil types in a glasshouse. We identified root nodule rhizobium communities associating with seedlings grown in each treatment combination using next-generation sequencing (NGS) techniques.
Our results show that different CCR soils affected growth performances of seedlings for both species while the addition of Australian bradyrhizobia affected growth performances of A. saligna, but not P. pinnata. NGS data revealed that each legume associated mostly with their familiar rhizobial partners, regardless of soil conditions or inoculum treatment. Acacia saligna predominantly associated with Australian bradyrhizobia, even when grown in soils without inoculum, while P. pinnata largely associated with native South African Mesorhizobium strains.
Our study suggests that exotic Australian bradyrhizobia are already present and widespread in pristine CCR soils, and that mutualist limitation is not an impediment to further acacia invasion in the region. The ability of P. pinnata to sanction Australian Bradyrhizobium strains suggests that this species may be a good candidate for restoration efforts following the removal of acacias in CCR habitats.
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Invasional meltdown via horizontal gene transfer of a European symbiosis island variant in North American nodule symbionts of Cytisus scoparius. Biol Invasions 2022. [DOI: 10.1007/s10530-022-02776-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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7
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Rhizosphere Diazotrophs and Other Bacteria Associated with Native and Encroaching Legumes in the Succulent Karoo Biome in South Africa. Microorganisms 2022; 10:microorganisms10020216. [PMID: 35208671 PMCID: PMC8880511 DOI: 10.3390/microorganisms10020216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 12/04/2021] [Accepted: 12/23/2021] [Indexed: 12/10/2022] Open
Abstract
Total and diazotrophic bacteria were assessed in the rhizosphere soils of native and encroaching legumes growing in the Succulent Karoo Biome (SKB), South Africa. These were Calobota sericea, Lessertia diffusa, Vachellia karroo, and Wiborgia monoptera, of Fabaceae family near Springbok (Northern Cape Province) and neighboring refugia of the Fynbos biome for C. sericea for comparison purposes. Metabarcoding approach using 16S rRNA gene revealed Actinobacteria (26.7%), Proteobacteria (23.6%), Planctomycetes, and Acidobacteria (10%), while the nifH gene revealed Proteobacteria (70.3%) and Cyanobacteria (29.5%) of the total sequences recovered as the dominant phyla. Some of the diazotrophs measured were assigned to families; Phyllobacteriaceae (39%) and Nostocaceae (24.4%) (all legumes), Rhodospirillaceae (7.9%), Bradyrhizobiaceae (4.6%) and Methylobacteriaceae (3%) (C. sericea, V. karroo, W. monoptera), Rhizobiaceae (4.2%; C. sericea, L. diffusa, V. Karroo), Microchaetaceae (4%; W. monoptera, V. karroo), Scytonemataceae (3.1%; L. diffusa, W. monoptera), and Pseudomonadaceae (2.7%; V. karroo) of the total sequences recovered. These families have the potential to fix the atmospheric nitrogen. While some diazotrophs were specific or shared across several legumes, a member of Mesorhizobium species was common in all rhizosphere soils considered. V. karroo had statistically significantly higher Alpha and distinct Beta-diversity values, than other legumes, supporting its influence on soil microbes. Overall, this work showed diverse bacteria that support plant life in harsh environments such as the SKB, and shows how they are influenced by legumes.
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Pickett B, Carey CJ, Arogyaswamy K, Botthoff J, Maltz M, Catalán P, Aronson EL. Enriched root bacterial microbiome in invaded vs native ranges of the model grass allotetraploid Brachypodium hybridum. Biol Invasions 2021. [DOI: 10.1007/s10530-021-02692-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
AbstractInvasive species can shift the composition of key soil microbial groups, thus creating novel soil microbial communities. To better understand the biological drivers of invasion, we studied plant-microbial interactions in species of the Brachypodium distachyon complex, a model system for functional genomic studies of temperate grasses and bioenergy crops. While Brachypodium hybridum invasion in California is in an incipient stage, threatening natural and agricultural systems, its diploid progenitor species B. distachyon is not invasive in California. We investigated the root, soil, and rhizosphere bacterial composition of Brachypodium hybridum in both its native and invaded range, and of B. distachyon in the native range. We used high-throughput, amplicon sequencing to evaluate if the bacteria associated with these plants differ, and whether biotic controls may be driving B. hybridum invasion. Bacterial community composition of B. hybridum differed based on provenance (native or invaded range) for root, rhizosphere, and bulk soils, as did the abundance of dominant bacterial taxa. Bacteroidetes, Cyanobacteria and Bacillus spp. (species) were significantly more abundant in B. hybridum roots from the invaded range, whereas Proteobacteria, Firmicutes, Erwinia and Pseudomonas were more abundant in the native range roots. Brachypodium hybridum forms novel biotic interactions with a diverse suite of rhizosphere microbes from the invaded range, which may not exert a similar influence within its native range, ostensibly contributing to B. hybridum’s invasiveness. These associated plant microbiomes could inform future management approaches for B. hybridum in its invaded range and could be key to understanding, predicting, and preventing future plant invasions.
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Ramoneda J, Roux JJL, Frossard E, Frey B, Gamper HA. Geographical patterns of root nodule bacterial diversity in cultivated and wild populations of a woody legume crop. FEMS Microbiol Ecol 2021; 96:5874250. [PMID: 32691840 DOI: 10.1093/femsec/fiaa145] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 07/20/2020] [Indexed: 12/23/2022] Open
Abstract
There is interest in understanding how cultivation, plant genotype, climate and soil conditions influence the biogeography of root nodule bacterial communities of legumes. For crops from regions with relict wild populations, this is of even greater interest because the effects of cultivation on symbiont communities can be revealed, which is of particular interest for bacteria such as rhizobia. Here, we determined the structure of root nodule bacterial communities of rooibos (Aspalathus linearis), a leguminous shrub endemic to South Africa. We related the community dissimilarities of the root nodule bacteria of 18 paired cultivated and wild rooibos populations to pairwise geographical distances, plant ecophysiological characteristics and soil physicochemical parameters. Using next-generation sequencing data, we identified region-, cultivation- and farm-specific operational taxonomic units for four distinct classes of root nodule bacterial communities, dominated by members of the genus Mesorhizobium. We found that while bacterial richness was locally increased by organic cultivation, strong biogeographical differentiation in the bacterial communities of wild rooibos disappeared with cultivation of one single cultivar across its entire cultivation range. This implies that expanding rooibos farming has the potential to endanger wild rooibos populations through the homogenisation of root nodule bacterial diversity.
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Affiliation(s)
- Josep Ramoneda
- Department of Environmental Systems Science, ETH Zurich, Eschikon 33, 8315 Lindau, Zurich, Switzerland
| | - Johannes J Le Roux
- Department of Biological Sciences, Macquarie University, Balaclava Rd, Macquarie Park NSW 2109, Sydney, Australia
| | - Emmanuel Frossard
- Department of Environmental Systems Science, ETH Zurich, Eschikon 33, 8315 Lindau, Zurich, Switzerland
| | - Beat Frey
- Rhizosphere Processes Group, Swiss Federal Research Institute WSL, Zürcherstrasse 111, 8903 Birmensdorf, Switzerland
| | - Hannes Andres Gamper
- Department of Environmental Systems Science, ETH Zurich, Eschikon 33, 8315 Lindau, Zurich, Switzerland.,Faculty of Science and Technology, Free University of Bolzen-Bolzano, Piazza Università, 1, 39100 Bolzano BZ, Italy
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10
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Hui C, Richardson DM, Landi P, Minoarivelo HO, Roy HE, Latombe G, Jing X, CaraDonna PJ, Gravel D, Beckage B, Molofsky J. Trait positions for elevated invasiveness in adaptive ecological networks. Biol Invasions 2021. [DOI: 10.1007/s10530-021-02484-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
AbstractOur ability to predict the outcome of invasion declines rapidly as non-native species progress through intertwined ecological barriers to establish and spread in recipient ecosystems. This is largely due to the lack of systemic knowledge on key processes at play as species establish self-sustaining populations within the invaded range. To address this knowledge gap, we present a mathematical model that captures the eco-evolutionary dynamics of native and non-native species interacting within an ecological network. The model is derived from continuous-trait evolutionary game theory (i.e., Adaptive Dynamics) and its associated concept of invasion fitness which depicts dynamic demographic performance that is both trait mediated and density dependent. Our approach allows us to explore how multiple resident and non-native species coevolve to reshape invasion performance, or more precisely invasiveness, over trait space. The model clarifies the role of specific traits in enabling non-native species to occupy realised opportunistic niches. It also elucidates the direction and speed of both ecological and evolutionary dynamics of residing species (natives or non-natives) in the recipient network under different levels of propagule pressure. The versatility of the model is demonstrated using four examples that correspond to the invasion of (i) a horizontal competitive community; (ii) a bipartite mutualistic network; (iii) a bipartite antagonistic network; and (iv) a multi-trophic food web. We identified a cohesive trait strategy that enables the success and establishment of non-native species to possess high invasiveness. Specifically, we find that a non-native species can achieve high levels of invasiveness by possessing traits that overlap with those of its facilitators (and mutualists), which enhances the benefits accrued from positive interactions, and by possessing traits outside the range of those of antagonists, which mitigates the costs accrued from negative interactions. This ‘central-to-reap, edge-to-elude’ trait strategy therefore describes the strategic trait positions of non-native species to invade an ecological network. This model provides a theoretical platform for exploring invasion strategies in complex adaptive ecological networks.
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Wendlandt CE, Helliwell E, Roberts M, Nguyen KT, Friesen ML, von Wettberg E, Price P, Griffitts JS, Porter SS. Decreased coevolutionary potential and increased symbiont fecundity during the biological invasion of a legume-rhizobium mutualism. Evolution 2021; 75:731-747. [PMID: 33433925 DOI: 10.1111/evo.14164] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 10/08/2020] [Accepted: 12/07/2020] [Indexed: 12/20/2022]
Abstract
Although most invasive species engage in mutualism, we know little about how mutualism evolves as partners colonize novel environments. Selection on cooperation and standing genetic variation for mutualism traits may differ between a mutualism's invaded and native ranges, which could alter cooperation and coevolutionary dynamics. To test for such differences, we compare mutualism traits between invaded- and native-range host-symbiont genotype combinations of the weedy legume, Medicago polymorpha, and its nitrogen-fixing rhizobium symbiont, Ensifer medicae, which have coinvaded North America. We find that mutualism benefits for plants are indistinguishable between invaded- and native-range symbioses. However, rhizobia gain greater fitness from invaded-range mutualisms than from native-range mutualisms, and this enhancement of symbiont fecundity could increase the mutualism's spread by increasing symbiont availability during plant colonization. Furthermore, mutualism traits in invaded-range symbioses show lower genetic variance and a simpler partitioning of genetic variance between host and symbiont sources, compared to native-range symbioses. This suggests that biological invasion has reduced mutualists' potential to respond to coevolutionary selection. Additionally, rhizobia bearing a locus (hrrP) that can enhance symbiotic fitness have more exploitative phenotypes in invaded-range than in native-range symbioses. These findings highlight the impacts of biological invasion on the evolution of mutualistic interactions.
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Affiliation(s)
- Camille E Wendlandt
- School of Biological Sciences, Washington State University, Vancouver, Washington
| | - Emily Helliwell
- School of Biological Sciences, Washington State University, Vancouver, Washington
| | - Miles Roberts
- School of Biological Sciences, Washington State University, Vancouver, Washington
| | - Kyle T Nguyen
- School of Biological Sciences, Washington State University, Vancouver, Washington
| | - Maren L Friesen
- Department of Plant Pathology, Department of Crop and Soil Sciences, Washington State University, Pullman, Washington
| | - Eric von Wettberg
- Department of Plant and Soil Science, Gund Institute for the Environment, University of Vermont, Burlington, Vermont
| | - Paul Price
- Department of Biology, Eastern Michigan University, Ypsilanti, Michigan
| | - Joel S Griffitts
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, Utah
| | - Stephanie S Porter
- School of Biological Sciences, Washington State University, Vancouver, Washington
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13
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Microbial mutualist distribution limits spread of the invasive legume Medicago polymorpha. Biol Invasions 2020. [DOI: 10.1007/s10530-020-02404-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Wandrag EM, Birnbaum C, Klock MM, Barrett LG, Thrall PH. Availability of soil mutualists may not limit non‐native
Acacia
invasion but could increase their impact on native soil communities. J Appl Ecol 2020. [DOI: 10.1111/1365-2664.13577] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elizabeth M. Wandrag
- School of Environmental and Rural Science University of New England Armidale NSW Australia
- Institute for Applied Ecology University of Canberra Canberra ACT Australia
| | | | - Metha M. Klock
- Department of Environmental Studies San José State University San José CA USA
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Novoa A, Richardson DM, Pyšek P, Meyerson LA, Bacher S, Canavan S, Catford JA, Čuda J, Essl F, Foxcroft LC, Genovesi P, Hirsch H, Hui C, Jackson MC, Kueffer C, Le Roux JJ, Measey J, Mohanty NP, Moodley D, Müller-Schärer H, Packer JG, Pergl J, Robinson TB, Saul WC, Shackleton RT, Visser V, Weyl OLF, Yannelli FA, Wilson JRU. Invasion syndromes: a systematic approach for predicting biological invasions and facilitating effective management. Biol Invasions 2020. [DOI: 10.1007/s10530-020-02220-w] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
AbstractOur ability to predict invasions has been hindered by the seemingly idiosyncratic context-dependency of individual invasions. However, we argue that robust and useful generalisations in invasion science can be made by considering “invasion syndromes” which we define as “a combination of pathways, alien species traits, and characteristics of the recipient ecosystem which collectively result in predictable dynamics and impacts, and that can be managed effectively using specific policy and management actions”. We describe this approach and outline examples that highlight its utility, including: cacti with clonal fragmentation in arid ecosystems; small aquatic organisms introduced through ballast water in harbours; large ranid frogs with frequent secondary transfers; piscivorous freshwater fishes in connected aquatic ecosystems; plant invasions in high-elevation areas; tall-statured grasses; and tree-feeding insects in forests with suitable hosts. We propose a systematic method for identifying and delimiting invasion syndromes. We argue that invasion syndromes can account for the context-dependency of biological invasions while incorporating insights from comparative studies. Adopting this approach will help to structure thinking, identify transferrable risk assessment and management lessons, and highlight similarities among events that were previously considered disparate invasion phenomena.
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McCue MD, Javal M, Clusella‐Trullas S, Le Roux JJ, Jackson MC, Ellis AG, Richardson DM, Valentine AJ, Terblanche JS. Using stable isotope analysis to answer fundamental questions in invasion ecology: Progress and prospects. Methods Ecol Evol 2019. [DOI: 10.1111/2041-210x.13327] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Marshall D. McCue
- Sable Systems International Las Vegas NV USA
- Department of Conservation Ecology and Entomology Centre for Invasion Biology Stellenbosch University Stellenbosch South Africa
| | - Marion Javal
- Department of Conservation Ecology and Entomology Centre for Invasion Biology Stellenbosch University Stellenbosch South Africa
| | - Susana Clusella‐Trullas
- Centre for Invasion Biology Department of Botany and Zoology Stellenbosch University Stellenbosch South Africa
| | - Johannes J. Le Roux
- Centre for Invasion Biology Department of Botany and Zoology Stellenbosch University Stellenbosch South Africa
- Department of Biological Sciences Macquarie University NSW Australia
| | - Michelle C. Jackson
- Centre for Invasion Biology Department of Botany and Zoology Stellenbosch University Stellenbosch South Africa
- Department of Life Sciences Imperial College London Ascot UK
- Department of Zoology Oxford University Oxford UK
| | - Allan G. Ellis
- Department of Botany and Zoology Stellenbosch University Stellenbosch South Africa
| | - David M. Richardson
- Centre for Invasion Biology Department of Botany and Zoology Stellenbosch University Stellenbosch South Africa
| | - Alex J. Valentine
- Department of Botany and Zoology Stellenbosch University Stellenbosch South Africa
| | - John S. Terblanche
- Department of Conservation Ecology and Entomology Centre for Invasion Biology Stellenbosch University Stellenbosch South Africa
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17
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Ramoneda J, Le Roux J, Frossard E, Bester C, Oettlé N, Frey B, Gamper HA. Insights from invasion ecology: Can consideration of eco-evolutionary experience promote benefits from root mutualisms in plant production? AOB PLANTS 2019; 11:plz060. [PMID: 31777649 PMCID: PMC6863469 DOI: 10.1093/aobpla/plz060] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 09/13/2019] [Indexed: 06/10/2023]
Abstract
Mutualistic plant-microbial functioning relies on co-adapted symbiotic partners as well as conducive environmental conditions. Choosing particular plant genotypes for domestication and subsequent cultivar selection can narrow the gene pools of crop plants to a degree that they are no longer able to benefit from microbial mutualists. Elevated mineral nutrient levels in cultivated soils also reduce the dependence of crops on nutritional support by mutualists such as mycorrhizal fungi and rhizobia. Thus, current ways of crop production are predestined to compromise the propagation and function of microbial symbionts, limiting their long-term benefits for plant yield stability. The influence of mutualists on non-native plant establishment and spread, i.e. biological invasions, provides an unexplored analogue to contemporary crop production that accounts for mutualistic services from symbionts like rhizobia and mycorrhizae. The historical exposure of organisms to biotic interactions over evolutionary timescales, or so-called eco-evolutionary experience (EEE), has been used to explain the success of such invasions. In this paper, we stress that consideration of the EEE concept can shed light on how to overcome the loss of microbial mutualist functions following crop domestication and breeding. We propose specific experimental approaches to utilize the wild ancestors of crops to determine whether crop domestication compromised the benefits derived from root microbial symbioses or not. This can predict the potential for success of mutualistic symbiosis manipulation in modern crops and the maintenance of effective microbial mutualisms over the long term.
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Affiliation(s)
- Josep Ramoneda
- Group of Plant Nutrition, Department of Environmental Systems Science, ETH Zurich, Lindau, Switzerland
| | - Johannes Le Roux
- Department of Biological Sciences, Macquarie University, Sydney, New South Wales, Australia
| | - Emmanuel Frossard
- Group of Plant Nutrition, Department of Environmental Systems Science, ETH Zurich, Lindau, Switzerland
| | - Cecilia Bester
- South African Agricultural Research Council (ARC-Infruitec), Nieuwoudtville Northern Cape, Stellenbosch Central, Stellenbosch, South Africa
| | - Noel Oettlé
- Environmental Monitoring Group (EMG), Nieuwoudtville Northern Cape, South Africa
| | - Beat Frey
- Rhizosphere Processes Group, Swiss Federal Research Institute WSL, Birmensdorf, Switzerland
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18
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Nnakenyi CA, Traveset A, Heleno R, Minoarivelo HO, Hui C. Fine‐tuning the nested structure of pollination networks by adaptive interaction switching, biogeography and sampling effect in the Galápagos Islands. OIKOS 2019. [DOI: 10.1111/oik.06053] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chinenye A. Nnakenyi
- Centre for Invasion Biology, Dept of Mathematical Sciences, Stellenbosch Univ Matieland 7602 South Africa
| | - Anna Traveset
- Mediterranean Inst. of Advanced Studies (CSIC‐UIB), Global Change Research Group, Esporles, Mallorca Balearic Islands Spain
| | - Ruben Heleno
- Centre for Functional Ecology, Dept of Life Sciences, Univ. of Coimbra Coimbra Portugal
| | - Henintsoa O. Minoarivelo
- Centre for Invasion Biology, Dept of Mathematical Sciences, Stellenbosch Univ Matieland 7602 South Africa
| | - Cang Hui
- Centre for Invasion Biology, Dept of Mathematical Sciences, Stellenbosch Univ Matieland 7602 South Africa
- Mathematical Biosciences Group, African Inst. for Mathematical Sciences Cape Town South Africa
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19
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Li J, Oduor AMO, Yu F, Dong M. A native parasitic plant and soil microorganisms facilitate a native plant co-occurrence with an invasive plant. Ecol Evol 2019; 9:8652-8663. [PMID: 31410269 PMCID: PMC6686308 DOI: 10.1002/ece3.5407] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 06/04/2019] [Accepted: 06/05/2019] [Indexed: 11/08/2022] Open
Abstract
Invasive plants often interact with antagonists that include native parasitic plants and pathogenic soil microbes, which may reduce fitness of the invaders. However, to date, most of the studies on the ecological consequences of antagonistic interactions between invasive plants and the resident biota focused only on pairwise interactions. A full understanding of invasion dynamics requires studies that test the effects of multiple antagonists on fitness of invasive plants and co-occurring native plants. Here, we used an invasive plant Mikania micrantha, a co-occurring native plant Coix lacryma-jobi, and a native holoparasitic plant Cuscuta campestris to test whether parasitism on M. micrantha interacts with soil fungi and bacteria to reduce fitness of the invader and promote growth of the co-occurring native plant. In a factorial setup, M. micrantha and C. lacryma-jobi were grown together in pots in the presence versus absence of parasitism on M. micrantha by C. campestris and in the presence versus absence of full complements of soil bacteria and fungi. Fungicide and bactericide were used to suppress soil fungi and bacteria, respectively. Findings show that heavy parasitism by C. campestris caused the greatest reduction in M. micrantha biomass when soil fungi and bacteria were suppressed. In contrast, the co-occurring native plant C. lacryma-jobi experienced the greatest increase in biomass when grown with heavily parasitized M. micrantha and in the presence of a full complement of soil fungi and bacteria. Taken together, our results suggest that selective parasitism on susceptible invasive plants by native parasitic plants and soil microorganisms may diminish competitive ability of invasive plants and facilitate native plant coexistence with invasive plants.
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Affiliation(s)
- Junmin Li
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and ConservationTaizhou UniversityTaizhouChina
| | - Ayub M. O. Oduor
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and ConservationTaizhou UniversityTaizhouChina
- Department of Applied and Technical BiologyTechnical University of KenyaNairobiKenya
| | - Feihai Yu
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and ConservationTaizhou UniversityTaizhouChina
| | - Ming Dong
- Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, College of Life and Environmental SciencesHangzhou Normal UniversityHangzhouChina
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20
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Godoy O. Coexistence theory as a tool to understand biological invasions in species interaction networks: Implications for the study of novel ecosystems. Funct Ecol 2019. [DOI: 10.1111/1365-2435.13343] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Oscar Godoy
- Departamento de Biología, Instituto Universitario de Investigación Marina (INMAR) Universidad de Cádiz Puerto Real Spain
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21
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Kamutando CN, Vikram S, Kamgan-Nkuekam G, Makhalanyane TP, Greve M, Le Roux JJ, Richardson DM, Cowan DA, Valverde A. The Functional Potential of the Rhizospheric Microbiome of an Invasive Tree Species, Acacia dealbata. MICROBIAL ECOLOGY 2019; 77:191-200. [PMID: 29948018 DOI: 10.1007/s00248-018-1214-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Accepted: 05/28/2018] [Indexed: 05/09/2023]
Abstract
Plant-microbe interactions mediate both the invasiveness of introduced plant species and the impacts that they have in invaded ecosystems. Although the phylogenetic composition of the rhizospheric microbiome of Acacia dealbata (an invasive Australian tree species) has been investigated, little is known about the functional potential of the constituents of these altered microbial communities. We used shotgun DNA sequencing to better understand the link between bacterial community composition and functional capacity in the rhizospheric microbiomes associated with invasive A. dealbata populations in South Africa. Our analysis showed that several genes associated with plant growth-promoting (PGP) traits were significantly overrepresented in the rhizospheric metagenomes compared to neighbouring bulk soils collected away from A. dealbata stands. The majority of these genes are involved in the metabolism of nitrogen, carbohydrates and vitamins, and in various membrane transport systems. Overrepresented genes were linked to a limited number of bacterial taxa, mostly Bradyrhizobium species, the preferred N-fixing rhizobial symbiont of Australian acacias. Overall, these findings suggest that A. dealbata enriches rhizosphere soils with potentially beneficial microbial taxa, and that members of the genus Bradyrhizobium may play an integral role in mediating PGP processes that may influence the success of this invader when colonizing novel environments.
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Affiliation(s)
- Casper N Kamutando
- Centre for Microbial Ecology and Genomics, Department of Genetics, University of Pretoria, Pretoria, South Africa
| | - Surendra Vikram
- Centre for Microbial Ecology and Genomics, Department of Genetics, University of Pretoria, Pretoria, South Africa
| | - Gilbert Kamgan-Nkuekam
- Centre for Microbial Ecology and Genomics, Department of Genetics, University of Pretoria, Pretoria, South Africa
| | - Thulani P Makhalanyane
- Centre for Microbial Ecology and Genomics, Department of Genetics, University of Pretoria, Pretoria, South Africa
| | - Michelle Greve
- Department of Plant and Soil Sciences, University of Pretoria, Pretoria, South Africa
| | - Johannes J Le Roux
- Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Stellenbosch, South Africa
| | - David M Richardson
- Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Stellenbosch, South Africa
| | - Don A Cowan
- Centre for Microbial Ecology and Genomics, Department of Genetics, University of Pretoria, Pretoria, South Africa
| | - Angel Valverde
- Centre for Microbial Ecology and Genomics, Department of Genetics, University of Pretoria, Pretoria, South Africa.
- Department of Microbial, Biochemical and Food Biotechnology, University of the Free State, P.O. Box 339, Bloemfontein, Free State, 9300, South Africa.
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22
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Forrester NJ, Ashman TL. Nitrogen fertilization differentially enhances nodulation and host growth of two invasive legume species in an urban environment. JOURNAL OF URBAN ECOLOGY 2018. [DOI: 10.1093/jue/juy021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Nicole J Forrester
- Department of Biological Sciences, University of Pittsburgh, 4249 Fifth Avenue, Pittsburgh, PA, USA
| | - Tia-Lynn Ashman
- Department of Biological Sciences, University of Pittsburgh, 4249 Fifth Avenue, Pittsburgh, PA, USA
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23
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van Kleunen M, Bossdorf O, Dawson W. The Ecology and Evolution of Alien Plants. ANNUAL REVIEW OF ECOLOGY EVOLUTION AND SYSTEMATICS 2018. [DOI: 10.1146/annurev-ecolsys-110617-062654] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We review the state of the art of alien plant research with emphasis on conceptual advances and knowledge gains on general patterns and drivers, biotic interactions, and evolution. Major advances include the identification of different invasion stages and invasiveness dimensions (geographic range, habitat specificity, local abundance) and the identification of appropriate comparators while accounting for propagule pressure and year of introduction. Developments in phylogenetic and functional trait research bear great promise for better understanding of the underlying mechanisms. Global patterns are emerging with propagule pressure, disturbance, increased resource availability, and climate matching as major invasion drivers, but species characteristics also play a role. Biotic interactions with resident communities shape invasion outcomes, with major roles for species diversity, enemies, novel weapons, and mutualists. Mounting evidence has been found for rapid evolution of invasive aliens and evolutionary responses of natives, but a mechanistic understanding requires tighter integration of molecular and phenotypic approaches. We hope the open questions identified in this review will stimulate further research on the ecology and evolution of alien plants.
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Affiliation(s)
- Mark van Kleunen
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou 318000, China
- Ecology Group, Department of Biology, University of Konstanz, 78464 Konstanz, Germany
| | - Oliver Bossdorf
- Plant Evolutionary Ecology Group, Institute of Evolution and Ecology, University of Tübingen, 72076 Tübingen, Germany
| | - Wayne Dawson
- Department of Biosciences, Durham University, Durham DH1 3LE, United Kingdom
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24
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Timóteo S, O'Connor CJ, López-Núñez FA, Costa JM, Gouveia AC, Heleno RH. Pollination networks from natural and anthropogenic-novel communities show high structural similarity. Oecologia 2018; 188:1155-1165. [PMID: 30361763 DOI: 10.1007/s00442-018-4281-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 09/28/2018] [Indexed: 11/27/2022]
Abstract
The Anthropocene is marked by an unprecedented homogenisation of the world's biota, confronting species that never co-occurred during their evolutionary histories. Interactions established in these novel communities may affect ecosystem functioning; however, most research has focused on the impacts of a minority of aggressive invasive species, while changes inflicted by a less conspicuous majority of non-invasive alien species on community structure are still poorly understood. This information is critical to guide conservation strategies, and instrumental to advance ecological theory, particularly to understand how non-native species integrate in recipient communities and affect the interactions of native species. We evaluated how the structure of 50 published pollination networks changes with the proportion of alien plant species and found that network structure is largely unaffected. Although some communities were heavily invaded, the proportion of alien plant species was relatively low (mean = 10%; max. = 38%). We further characterized the pollination network in a botanic garden with a plant community dominated by non-invasive alien species (85%). We show that the structure of this novel community is also not markedly different from native-dominated communities. Plant-pollinator interactions revealed no obvious differences regarding plant origin (native vs. alien) or the native bioregion of the introduced plants. This overall similarity between native and alien plants is likely driven by the contrasting patterns of invasive plants (promoting generalism), and non-invasive aliens, suggested here to promote specialization.
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Affiliation(s)
- Sérgio Timóteo
- Department of Life Sciences, Centre for Functional Ecology (CFE-UC), University of Coimbra, Coimbra, Portugal.
| | - Catherine J O'Connor
- Department of Life Sciences, Centre for Functional Ecology (CFE-UC), University of Coimbra, Coimbra, Portugal
- Cardiff School of Biosciences, Cardiff University, Cardiff, UK
| | - Francisco A López-Núñez
- Department of Life Sciences, Centre for Functional Ecology (CFE-UC), University of Coimbra, Coimbra, Portugal
| | - José M Costa
- Department of Life Sciences, Centre for Functional Ecology (CFE-UC), University of Coimbra, Coimbra, Portugal
| | - António C Gouveia
- Department of Life Sciences, Centre for Functional Ecology (CFE-UC), University of Coimbra, Coimbra, Portugal
- Botanic Garden of the University of Coimbra, Coimbra, Portugal
| | - Ruben H Heleno
- Department of Life Sciences, Centre for Functional Ecology (CFE-UC), University of Coimbra, Coimbra, Portugal
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25
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Minoarivelo HO, Hui C. Alternative assembly processes from trait-mediated co-evolution in mutualistic communities. J Theor Biol 2018; 454:146-153. [PMID: 29885411 DOI: 10.1016/j.jtbi.2018.06.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 04/25/2018] [Accepted: 06/04/2018] [Indexed: 11/30/2022]
Abstract
Ecological and evolutionary dynamics observed in mutualistic communities can be shaped by several mechanisms, including ecological interactions and their co-evolutionary consequences. Here we explore how intra and interspecific competition, together with mutualistic interactions, can affect community assembly through their effects on adaptive diversification and the emergence of biodiversity. To capture both ecological and evolutionary processes simultaneously, we used the adaptive dynamics approach based on a Lotka-Volterra framework and simulated the ecological dynamics of populations as well as the evolutionary dynamics of phenotypic traits. Depending on the initial trait values, two possible alternative evolutionary regimes emerged: traits evolve towards either optimal utilization of environmental resources or maximizing the benefits from mutualistic interactions. Diversification and overall biodiversity are mostly driven by frequency-dependent competition, while mutualism plays an important role in enhancing ecosystem productivity and evolutionary stability. Because different initial trait values in a community can lead to alternative evolutionary regimes, species loss and biological invasions could not only alter ecological dynamics but also push the system onto an alternative successional climax or evolutionary end point. It thus becomes essential to clarify the past evolutionary dynamics so as to draw conclusions on key community assembly processes.
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Affiliation(s)
- Henintsoa O Minoarivelo
- Theoretical Ecology Group, Department of Mathematical Sciences, Stellenbosch University, Matieland 7602, South Africa; Centre of Excellence in Mathematical and Statistical Sciences, Wits University, Gauteng 2050, South Africa.
| | - Cang Hui
- Theoretical Ecology Group, Department of Mathematical Sciences, Stellenbosch University, Matieland 7602, South Africa; Mathematical and Physical BioSciences, African Institute for Mathematical Sciences, Muizenberg 7945, South Africa
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26
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Landi P, Minoarivelo HO, Brännström Å, Hui C, Dieckmann U. Complexity and stability of ecological networks: a review of the theory. POPUL ECOL 2018. [DOI: 10.1007/s10144-018-0628-3] [Citation(s) in RCA: 182] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Pietro Landi
- Department of Mathematical SciencesStellenbosch UniversityStellenboschSouth Africa
- Evolution and Ecology ProgramInternational Institute for Applied Systems AnalysisLaxenburgAustria
| | - Henintsoa O. Minoarivelo
- Department of Mathematical SciencesStellenbosch UniversityStellenboschSouth Africa
- Centre of Excellence in Mathematical and Statistical SciencesWits UniversityJohannesburgSouth Africa
| | - Åke Brännström
- Evolution and Ecology ProgramInternational Institute for Applied Systems AnalysisLaxenburgAustria
- Department of Mathematics and Mathematical StatisticsUmeå UniversityUmeåSweden
| | - Cang Hui
- Department of Mathematical SciencesStellenbosch UniversityStellenboschSouth Africa
- Mathematical and Physical BiosciencesAfrican Institute for Mathematical SciencesMuizenbergSouth Africa
| | - Ulf Dieckmann
- Evolution and Ecology ProgramInternational Institute for Applied Systems AnalysisLaxenburgAustria
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27
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Stępkowski T, Banasiewicz J, Granada CE, Andrews M, Passaglia LMP. Phylogeny and Phylogeography of Rhizobial Symbionts Nodulating Legumes of the Tribe Genisteae. Genes (Basel) 2018. [PMID: 29538303 PMCID: PMC5867884 DOI: 10.3390/genes9030163] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The legume tribe Genisteae comprises 618, predominantly temperate species, showing an amphi-Atlantic distribution that was caused by several long-distance dispersal events. Seven out of the 16 authenticated rhizobial genera can nodulate particular Genisteae species. Bradyrhizobium predominates among rhizobia nodulating Genisteae legumes. Bradyrhizobium strains that infect Genisteae species belong to both the Bradyrhizobium japonicum and Bradyrhizobium elkanii superclades. In symbiotic gene phylogenies, Genisteae bradyrhizobia are scattered among several distinct clades, comprising strains that originate from phylogenetically distant legumes. This indicates that the capacity for nodulation of Genisteae spp. has evolved independently in various symbiotic gene clades, and that it has not been a long-multi-step process. The exception is Bradyrhizobium Clade II, which unlike other clades comprises strains that are specialized in nodulation of Genisteae, but also Loteae spp. Presumably, Clade II represents an example of long-lasting co-evolution of bradyrhizobial symbionts with their legume hosts.
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Affiliation(s)
- Tomasz Stępkowski
- Autonomous Department of Microbial Biology, Faculty of Agriculture and Biology, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776 Warsaw, Poland.
| | - Joanna Banasiewicz
- Autonomous Department of Microbial Biology, Faculty of Agriculture and Biology, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776 Warsaw, Poland.
| | - Camille E Granada
- Universidade do Vale do Taquari-UNIVATES, Rua Avelino Tallini, 171, 95900-000 Lajeado, RS, Brazil.
| | - Mitchell Andrews
- Faculty of Agriculture and Life Sciences, Lincoln University, P.O. Box 84, Lincoln 7647, New Zealand.
| | - Luciane M P Passaglia
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul. Av. Bento Gonçalves, 9500, Caixa Postal 15.053, 91501-970 Porto Alegre, RS, Brazil.
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