1
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Chen M, Ding Z, Zhou M, Shang Y, Li C, Li Q, Bu T, Tang Z, Chen H. The diversity of endophytic fungi in Tartary buckwheat ( Fagopyrum tataricum) and its correlation with flavonoids and phenotypic traits. Front Microbiol 2024; 15:1360988. [PMID: 38559356 PMCID: PMC10979544 DOI: 10.3389/fmicb.2024.1360988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Accepted: 02/26/2024] [Indexed: 04/04/2024] Open
Abstract
Tartary buckwheat (Fagopyrum tataricum) is a significant medicinal crop, with flavonoids serving as a crucial measure of its quality. Presently, the artificial cultivation of Tartary buckwheat yields low results, and the quality varies across different origins. Therefore, it is imperative to identify an effective method to enhance the yield and quality of buckwheat. Endophytic fungi reside within plants and form a mutually beneficial symbiotic relationship, aiding plants in nutrient absorption, promoting host growth, and improving secondary metabolites akin to the host. In this study, high-throughput sequencing technology was employed to assess the diversity of endophytic fungi in Tartary buckwheat. Subsequently, a correlation analysis was performed between fungi and metabolites, revealing potential increases in flavonoid content due to endophytic fungi such as Bipolaris, Hymenula, and Colletotrichum. Additionally, a correlation analysis between fungi and phenotypic traits unveiled the potential influence of endophytic fungi such as Bipolaris, Buckleyzyma, and Trichosporon on the phenotypic traits of Tartary buckwheat. Notably, the endophytic fungi of the Bipolaris genus exhibited the potential to elevate the content of Tartary buckwheat metabolites and enhance crop growth. Consequently, this study successfully identified the resources of endophytic fungi in Tartary buckwheat, explored potential functional endophytic fungi, and laid a scientific foundation for future implementation of biological fertilizers in improving the quality and growth of Tartary buckwheat.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Hui Chen
- College of Life Sciences, Sichuan Agricultural University, Ya’an, China
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2
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Liu Z, Michalet R, Wang C, Wang Y, Chen J, Cui H, Song H, Wang J, Yang Z, An L, Xiao S, Chen S. Contrasting effects of two phenotypes of an alpine cushion plant on understory species drive community assembly. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 859:160154. [PMID: 36375548 DOI: 10.1016/j.scitotenv.2022.160154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 10/24/2022] [Accepted: 11/09/2022] [Indexed: 06/16/2023]
Abstract
In alpine systems, cushion plants act as foundation species by ameliorating local environmental conditions. Empirical studies indicate that contrasting phenotypes of alpine cushion species have different effects on understory plant species, either facilitative or competitive. Furthermore, dependent species within each community type might also exhibit different responses to each cushion phenotype, which can be clustered into several "response groups". Additionally, these species-groups specific responses to alpine cushion species phenotypes could alter community assembly. However, very few studies have assessed responses of dependent communities at species-group levels, in particular for both above- and below-ground communities. Here, we selected a loose and a tight phenotype of the alpine cushion species Thylacospermum caespitosum in two sites of northwest China, and use the relative intensity of interactions index to quantify cushion plant effects on subordinate communities of plants and soil fungi and bacteria. We assessed variations in responses of both above- and below-ground organisms to cushion plant effects at species-group level. Species-group level analyses showed that the effects of the phenotype varied among groups of each of the three community types, and different species-groups were composed by unique taxa. Additionally, we found that loose cushions enhanced stochastic processes in community assembly, for plants and soil fungi but not for soil bacteria. These variations of phenotypic effects on different species-group induced contrasting taxonomic composition between groups, and alter community assembly thereby. Our study highlights the occurrence of contrasting effects of two phenotypes of a foundation cushion plant on understory plants, soil fungi and bacteria community composition, but not necessarily on their richness. We also showed that assessing responses of understory species at the species-group level allows a more realistic and mechanistic understanding of biotic interactions both for above- and below-ground communities.
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Affiliation(s)
- Ziyang Liu
- Key Laboratory of Cell Activities and Stress Adaptations Ministry of Education, School of Life Sciences, Lanzhou University, Tianshui Road 222, Lanzhou, Gansu, People's Republic of China
| | - Richard Michalet
- Environnements et Paléoenvironnements Océaniques et Continentaux, University of Bordeaux, Bordeaux, France
| | - Chenyue Wang
- Key Laboratory of Cell Activities and Stress Adaptations Ministry of Education, School of Life Sciences, Lanzhou University, Tianshui Road 222, Lanzhou, Gansu, People's Republic of China
| | - Yajun Wang
- Key Laboratory of Cell Activities and Stress Adaptations Ministry of Education, School of Life Sciences, Lanzhou University, Tianshui Road 222, Lanzhou, Gansu, People's Republic of China
| | - Jingwei Chen
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Tianshui Road 222, Lanzhou, Gansu, People's Republic of China
| | - Hanwen Cui
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Tianshui Road 222, Lanzhou, Gansu, People's Republic of China
| | - Hongxian Song
- Key Laboratory of Cell Activities and Stress Adaptations Ministry of Education, School of Life Sciences, Lanzhou University, Tianshui Road 222, Lanzhou, Gansu, People's Republic of China
| | - Jiajia Wang
- Key Laboratory of Cell Activities and Stress Adaptations Ministry of Education, School of Life Sciences, Lanzhou University, Tianshui Road 222, Lanzhou, Gansu, People's Republic of China
| | - Zi Yang
- Key Laboratory of Cell Activities and Stress Adaptations Ministry of Education, School of Life Sciences, Lanzhou University, Tianshui Road 222, Lanzhou, Gansu, People's Republic of China
| | - Lizhe An
- Key Laboratory of Cell Activities and Stress Adaptations Ministry of Education, School of Life Sciences, Lanzhou University, Tianshui Road 222, Lanzhou, Gansu, People's Republic of China
| | - Sa Xiao
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Tianshui Road 222, Lanzhou, Gansu, People's Republic of China
| | - Shuyan Chen
- Key Laboratory of Cell Activities and Stress Adaptations Ministry of Education, School of Life Sciences, Lanzhou University, Tianshui Road 222, Lanzhou, Gansu, People's Republic of China.
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3
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Liancourt P, Doležal J. Overgrowth competition or facilitation from cushion plants: Implication for the role of plant-plant interactions. Ecology 2023; 104:e3989. [PMID: 36756970 DOI: 10.1002/ecy.3989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/22/2022] [Accepted: 12/28/2022] [Indexed: 02/10/2023]
Affiliation(s)
- Pierre Liancourt
- Botany Department, State Museum of Natural History Stuttgart, Stuttgart, Germany.,Plant Ecology Group, University of Tübingen, Tübingen, Germany
| | - Jiri Doležal
- Institute of Botany, Czech Academy of Sciences, Pruhonice, Czech Republic.,Department of Botany, Faculty of Science, University of South Bohemia, Ceske Budejovice, Czech Republic
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4
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Raath‐Krüger MJ, Schöb C, McGeoch MA, Burger DA, Strydom T, le Roux PC. Long‐term spatially‐replicated data show no physical cost to a benefactor species in a facilitative plant–plant interaction. OIKOS 2022. [DOI: 10.1111/oik.09617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Morgan J. Raath‐Krüger
- Dept of Zoology, Centre for Ecological Genomics and Wildlife Conservation, Univ. of Johannesburg Auckland Park South Africa
| | - Christian Schöb
- Inst. of Agricultural Sciences, ETH Zürich Zürich Switzerland
- Área de Biodiversidad y Conservación, Universidad Rey Juan Carlos, Móstoles Madrid Spain
| | - Melodie A. McGeoch
- Dept of Ecology, Environment and Evolution, School of Life Sciences, La Trobe Univ. Bundoora Victoria Australia
| | - Divan A. Burger
- Dept of Statistics, Univ. of Pretoria Pretoria South Africa
- Cytel Inc. Waltham MA USA
| | - Tanya Strydom
- Dept of Plant and Soil Sciences, Univ. of Pretoria Pretoria South Africa
| | - Peter C. le Roux
- Dept of Plant and Soil Sciences, Univ. of Pretoria Pretoria South Africa
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5
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Son D, Lee EJ. Soil Microbial Communities Associated with Three Arctic Plants in Different Local Environments in Ny-Ålesund, Svalbard. J Microbiol Biotechnol 2022; 32:1275-1283. [PMID: 36198667 PMCID: PMC9668094 DOI: 10.4014/jmb.2208.08009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/02/2022] [Accepted: 09/15/2022] [Indexed: 11/06/2022]
Abstract
Understanding soil microbial community structure in the Arctic is essential for predicting the impact of climate change on interactions between organisms living in polar environments. The hypothesis of the present study was that soil microbial communities and soil chemical characteristics would vary depending on their associated plant species and local environments in Arctic mature soils. We analyzed soil bacterial communities and soil chemical characteristics from soil without vegetation (bare soil) and rhizosphere soil of three Arctic plants (Cassiope tetragona [L.] D. Don, Dryas octopetala L. and Silene acaulis [L.] Jacq.) in different local environments (coal-mined site and seashore-adjacent site). We did not observe any clear differences in microbial community structure in samples belonging to different plant rhizospheres; however, samples from different environmental sites had distinct microbial community structure. The samples from coal-mined site had a relatively higher abundance of Bacteroidetes and Firmicutes. On the other hand, Acidobacteria was more prevalent in seashore-adjacent samples. The relative abundance of Proteobacteria and Acidobacteria decreased toward higher soil pH, whereas that of Bacteroidetes and Firmicutes was positively correlated with soil pH. Our results suggest that soil bacterial community dissimilarity can be driven by spatial heterogeneity in deglaciated mature soil. Furthermore, these results indicate that soil microbial composition and relative abundance are more affected by soil pH, an abiotic factor, than plant species, a biotic factor.
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Affiliation(s)
- Deokjoo Son
- College of Education Department of Science Education, Dankook University, Gyeonggi-do 16890, Republic of Korea,Corresponding author Phone: +82-31-8005-3844 E-mail:
| | - Eun Ju Lee
- Biological Sciences, Seoul National University, Seoul 08826, Republic of Korea
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6
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Pellegrini E, Incerti G, Pedersen O, Moro N, Foscari A, Casolo V, Contin M, Boscutti F. Flooding and Soil Properties Control Plant Intra- and Interspecific Interactions in Salt Marshes. PLANTS 2022; 11:plants11151940. [PMID: 35893643 PMCID: PMC9331060 DOI: 10.3390/plants11151940] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 07/15/2022] [Accepted: 07/22/2022] [Indexed: 11/16/2022]
Abstract
The stress gradient hypothesis (SGH) states that plant-plant interactions shift from competition to facilitation in increasing stress conditions. In salt marshes, edaphic properties can weaken the application of the SGH by amplifying the intensity of flooding and controlling plant zonation. We identified facilitative and competitive interactions along flooding gradients and tested the role of edaphic properties in exacerbating stress and shaping plant-plant interactions. Morphological traits of two target halophytes (Limonium narbonense and Sarcocornia fruticosa), flooding intensity, soil texture and soil organic C were recorded. The relative plant fitness index was assessed for the two species based on the relative growth in plurispecific rather than monospecific plant communities. Plant fitness increased with increasing stress supporting the SGH. L. narbonense showed larger fitness in plurispecific stands whereas S. fruticosa performed better in conspecific stands. Significant intra- or interspecific interactions were observed along the stress gradient defined by the combination of flooding and clay content in soil. When considering the limited soil organic C as stressor, soil properties were more important than flooding in defining plant-plant interactions. We highlight the need for future improvements of the SGH approach by including edaphic stressors in the model and their possible interactions with the main abiotic drivers of zonation.
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Affiliation(s)
- Elisa Pellegrini
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via delle Scienze 206, 33100 Udine, Italy; (G.I.); (N.M.); (A.F.); (V.C.); (M.C.); (F.B.)
- Department of Biology, University of Copenhagen, Universitetsparken 4, 2100 Copenhagen, Denmark;
- Correspondence:
| | - Guido Incerti
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via delle Scienze 206, 33100 Udine, Italy; (G.I.); (N.M.); (A.F.); (V.C.); (M.C.); (F.B.)
| | - Ole Pedersen
- Department of Biology, University of Copenhagen, Universitetsparken 4, 2100 Copenhagen, Denmark;
| | - Natasha Moro
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via delle Scienze 206, 33100 Udine, Italy; (G.I.); (N.M.); (A.F.); (V.C.); (M.C.); (F.B.)
| | - Alessandro Foscari
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via delle Scienze 206, 33100 Udine, Italy; (G.I.); (N.M.); (A.F.); (V.C.); (M.C.); (F.B.)
| | - Valentino Casolo
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via delle Scienze 206, 33100 Udine, Italy; (G.I.); (N.M.); (A.F.); (V.C.); (M.C.); (F.B.)
| | - Marco Contin
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via delle Scienze 206, 33100 Udine, Italy; (G.I.); (N.M.); (A.F.); (V.C.); (M.C.); (F.B.)
| | - Francesco Boscutti
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via delle Scienze 206, 33100 Udine, Italy; (G.I.); (N.M.); (A.F.); (V.C.); (M.C.); (F.B.)
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7
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Di Nuzzo L, Benesperi R, Nascimbene J, Papini A, Malaspina P, Incerti G, Giordani P. Little time left. Microrefuges may fail in mitigating the effects of climate change on epiphytic lichens. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 825:153943. [PMID: 35189219 DOI: 10.1016/j.scitotenv.2022.153943] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/31/2022] [Accepted: 02/13/2022] [Indexed: 06/14/2023]
Abstract
Climate change is already causing considerable reductions in biodiversity in all terrestrial ecosystems. These consequences are expected to be exacerbated in biomes that are particularly exposed to change, such as those in the Mediterranean, and in certain groups of more sensitive organisms, such as epiphytic lichens. These poikylohydric organisms find suitable light and water conditions on trunks under the tree canopy. Despite their small size, epiphytic communities contribute significantly to the functionality of forest ecosystems. In this work, we surveyed epiphytic lichen communities in a Mediterranean area (Sardinia, Italy) and hypothesized that 1) the effect of microclimate on lichens at tree scale is mediated by the functional traits of these organisms and that 2) micro-refuge trees with certain morphological characteristics can mitigate the negative effects of future climate change. Results confirm the first hypothesis, while the second is only partially supported, suggesting that the capability of specific trees to host specific conditions may not be sufficient to maintain the diversity and ecosystem functionality of lichen communities in the Mediterranean.
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Affiliation(s)
- Luca Di Nuzzo
- Department of Biology, University of Florence, Via La Pira 4, 50121 Florence, Italy
| | - Renato Benesperi
- Department of Biology, University of Florence, Via La Pira 4, 50121 Florence, Italy.
| | - Juri Nascimbene
- BIOME Lab, Department of Biological, Geological and Environmental Sciences, Alma Mater Studiorum - University of Bologna, Via Irnerio 42, 40126 Bologna, Italy
| | - Alessio Papini
- Department of Biology, University of Florence, Via La Pira 4, 50121 Florence, Italy
| | | | - Guido Incerti
- Department of Agri-Food, Animal and Environmental Sciences, University of Udine, 33100 Udine, Italy
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8
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Navarro‐Barranco C, Gribben PE, Ledet J J, Poore AGB. Habitat‐complexity regulates the intensity of facilitation along an environmental stress gradient. OIKOS 2022. [DOI: 10.1111/oik.08818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
| | - Paul E. Gribben
- Centre for Marine Science and Innovation, and Ecology and Evolution Research Centre, School of Biological, Earth and Environmental Sciences, Univ. of New South Wales Sydney Australia
- Sydney Inst. of Marine Science Mosman NSW Australia
| | - Janine Ledet J
- Centre for Marine Science and Innovation, and Ecology and Evolution Research Centre, School of Biological, Earth and Environmental Sciences, Univ. of New South Wales Sydney Australia
| | - Alistair G. B. Poore
- Centre for Marine Science and Innovation, and Ecology and Evolution Research Centre, School of Biological, Earth and Environmental Sciences, Univ. of New South Wales Sydney Australia
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9
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Filippi A, Braidot E, Petrussa E, Fabro M, Vuerich M, Boscutti F. Plant growth shapes the effects of elevation on the content and variability of flavonoids in subalpine bilberry stands. PLANT BIOLOGY (STUTTGART, GERMANY) 2021; 23:241-249. [PMID: 33037753 DOI: 10.1111/plb.13194] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
The study of morphological and physiological responses of shrubs to climate is crucial for the understanding of future scenarios regarding climate change. In this light, studying shrub growth and physiological acclimation along an elevation gradient might be insightful. The phenolic metabolic pathway represents a powerful tool to interpret such processes. In the South-Eastern Alps, we investigated the relationships between elevation, plant traits (i.e. age, xylem ring width, annual shoot length), plant-plant interaction (i.e. shrub cover) and flavonoids in Vaccinium myrtillus L. (leaves, berries) in stands above the treeline. The relationships were parsed within causal networks using a confirmatory path analysis. Elevation was the main driver of V. myrtillus growth, having both direct and indirect effects on the leaf flavonoid content, but this was less evident for berries. In particular, the content of foliar flavonoids showed a peak at mid-elevation and where the growth of xylem rings was intermediate, while it decreased in stands with higher shoot length. Flavonoid content variability of both leaves and berries was affected by elevation and shoot length. In berries, flavonoid variability was further related to all growth traits and shrub cover. These findings evidence that flavonoid content is influenced by both elevation and growth traits of V. myrtillus, often showing non-linear relationships. These results suggest a trait-mediated response of this plant to climate conditions as a result of trade-offs between plant growth, plant defence, environmental stress and nutrient/resource availability.
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Affiliation(s)
- A Filippi
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
| | - E Braidot
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
| | - E Petrussa
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
| | - M Fabro
- Servizio fitosanitario e chimico, ricerca, sperimentazione e assistenza tecnica, ERSA, Pozzuolo del Friuli, Italy
| | - M Vuerich
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
| | - F Boscutti
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
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10
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Reciprocal interactions between a non-native shrub and the dominant native trees of a high mountain woodland: who benefits? Biol Invasions 2021. [DOI: 10.1007/s10530-020-02355-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Raath-Krüger MJ, Schöb C, McGeoch MA, le Roux PC. Interspecific facilitation mediates the outcome of intraspecific interactions across an elevational gradient. Ecology 2020; 102:e03200. [PMID: 32970842 DOI: 10.1002/ecy.3200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 08/06/2020] [Indexed: 11/09/2022]
Abstract
Where interspecific facilitation favors the establishment of high densities of a beneficiary species, strong intraspecific competition may subsequently impede beneficiary performance. Consequently, the negative influence of intraspecific competition between beneficiary individuals could potentially outweigh the positive influence of interspecific facilitation when, for example, higher densities of a beneficiary are negated by the negative effect of crowding on beneficiary reproduction. The aim of this study was, therefore, to examine the impact of an interspecific interaction on the outcome of intraspecific interactions within the context of plant-plant facilitation. We used the cushion-forming Azorella selago and a commonly co-occurring dominant perennial grass species, Agrostis magellanica, on sub-Antarctic Marion Island as a model system. We assessed the impact of an interspecific interaction (between A. selago and A. magellanica) on the outcome of intraspecific interactions (between A. magellanica individuals), by testing if the impact of A. magellanica density on A. magellanica performance is mediated by its interaction with A. selago. We observed evidence for competition among A. magellanica conspecifics, with a decreasing proportion of A. magellanica individuals being reproductive under higher conspecific density. This negative intraspecific effect was greater on A. selago than on the adjacent substrate, suggesting that the facilitative effect of A. selago changes the intensity of intraspecific interactions between A. magellanica individuals. However, experimentally reducing A. magellanica density did not affect the species' performance. We also observed that the effect of A. selago on A. magellanica was positive, and despite the negative effect of intraspecific density on the proportion of reproductive A. magellanica individuals, the net reproductive effort of A. magellanica (i.e., the density of reproductive individuals) was significantly greater on A. selago than on the adjacent substrate. These results highlight that, in abiotically severe environments, the positive effects of interspecific facilitation by a benefactor species may outweigh the negative effects of intraspecific competition among beneficiaries. More broadly, these results suggest that both positive inter- and intraspecific biotic interactions may be key to consider when examining spatial and temporal variation in species' performance.
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Affiliation(s)
- Morgan J Raath-Krüger
- Department of Plant and Soil Sciences, University of Pretoria, Private Bag X20, Pretoria, 0002, South Africa.,Department of Zoology, Centre for Ecological Genomics and Wildlife Conservation, University of Johannesburg, PO Box 524, Auckland Park, 2006, South Africa
| | - Christian Schöb
- Department of Environmental Systems Science, Swiss Federal Institute of Technology, ETH Zürich, Zürich, 8092, Switzerland
| | - Melodie A McGeoch
- Department of Ecology, Environment and Evolution, School of Natural Sciences, La Trobe University, Bundoora, Victoria, 3086, Australia
| | - Peter C le Roux
- Department of Plant and Soil Sciences, University of Pretoria, Private Bag X20, Pretoria, 0002, South Africa
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12
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Wang C, Michalet R, Liu Z, Jiang X, Wang X, Zhang G, An L, Chen S, Xiao S. Disentangling Large- and Small-Scale Abiotic and Biotic Factors Shaping Soil Microbial Communities in an Alpine Cushion Plant System. Front Microbiol 2020; 11:925. [PMID: 32528430 PMCID: PMC7262953 DOI: 10.3389/fmicb.2020.00925] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/20/2020] [Indexed: 12/20/2022] Open
Abstract
Microorganisms play a crucial role in biogeochemical cycles and ecosystem processes, but the key factors driving microbial community structure are poorly understood, particularly in alpine environments. In this study, we aim to disentangle the relative contribution of abiotic and biotic factors shaping bacterial and fungal community structure at large and small spatial and integration scales in an alpine system dominated by a stress-tolerant cushion species Thylacospermum ceaspitosum. These effects were assessed in two mountain ranges of northwest China and for two contrasting phenotypes of the cushion species inhabiting two different microtopographic positions. The large- and small-scale abiotic effects include the site and microhabitat effects, respectively, while the large- and small-scale biotic effects include the effects of cushion presence and cushion phenotype, respectively. Soil microbial communities were characterized by Illumina Miseq sequencing. Uni- and multivariate statistics were used to test the effects of abiotic and biotic factors at both scales. Results indicated that the site effect representing the soil pH and abiotic hydrothermal conditions mainly affected bacterial community structure, whereas fungal community structure was mainly affected by biotic factors with an equal contribution of cushion presence and cushion phenotype effects. Future studies should analyze the direct factors contributing to shaping microbial community structure in particular of the cushion phenotypes.
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Affiliation(s)
- Chenyue Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, China
| | - Richard Michalet
- Environnements et Paléoenvironnements Océaniques et Continentaux, University of Bordeaux, Bordeaux, France
| | - Ziyang Liu
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, China
| | - Xingpei Jiang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, China
| | - Xiangtai Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, China
| | - Gaosen Zhang
- Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Extreme Environmental Microbial Resources and Engineering, Lanzhou, China
| | - Lizhe An
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, China
| | - Shuyan Chen
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, China
| | - Sa Xiao
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, China
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13
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Zhao RM, Zhang H, An LZ. Spatial patterns and interspecific relationships of two dominant cushion plants at three elevations on the Kunlun Mountain, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:17339-17349. [PMID: 32157543 DOI: 10.1007/s11356-020-08324-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Accepted: 03/04/2020] [Indexed: 06/10/2023]
Abstract
One of the most important ecological processes is the formation of interspecific relationships in relation to spatial patterns among alpine cushion plants in extreme environmental habitats. However, such relationships remain poorly understood. Here, we examined the spatial patterns of alpine cushion plants along an altitudinal gradient of environmental severity and the interspecific relationship between two cushion species (Thylacospermum caespitosum and Androsace tangulashanensis) on the eastern Kunlun Mountain of China. Our results showed that the two species were highly aggregated within a distance of 2.5-5 m at the mid (S2) altitude, whereas they were randomly distributed at the low (S1) and high (S3) altitudes. A positive spatial interaction between the two species was observed over shorter distances at the mid (S2) altitude, and the spatial patterns were related to the size of individuals of the two species. Moreover, the impact of A. tangulashanensis on T. caespitosum (RIIT. caespitosum) was negative in all the study plots, and a positive impact of T. caespitosum on A. tangulashanensis (RIIA. tangulashanensis) was only observed at the mid (S2) altitude. Together, these results demonstrated that the spatial patterns of these two cushions varied with environmental severity, since the outcome of the interactions were different, to some extent, at the three altitudes. Plant size is the main factor affecting the spatial correlation and interspecific relationship between two cushions. Therefore, its potential influence should be considered when discussing interspecific relationships among cushions and their community construction at small scales in alpine ecosystems.
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Affiliation(s)
- Rui-Ming Zhao
- College of Agronomy, Gansu Agricultural University, No. 1 Yingmen Village, Anning District, Lanzhou, 730070, Gansu, China.
| | - Hua Zhang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Tianshui South Road 222, Lanzhou, 730000, Gansu, China
| | - Li-Zhe An
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Tianshui South Road 222, Lanzhou, 730000, Gansu, China.
- Beijing Forestry University, No. 35 Tsinghua East Road, Haidian District, Beijing, 100083, China.
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Pescador DS, de la Cruz M, Chacón‐Labella J, Escudero A. The shape is more important than we ever thought: Plant to plant interactions in a high mountain community. Methods Ecol Evol 2019. [DOI: 10.1111/2041-210x.13248] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David S. Pescador
- Biodiversity and Conservation Unit, Department of Biology, Geology, Physics and Inorganic Chemistry ESCET, URJC; Móstoles Madrid Spain
| | - Marcelino de la Cruz
- Biodiversity and Conservation Unit, Department of Biology, Geology, Physics and Inorganic Chemistry ESCET, URJC; Móstoles Madrid Spain
| | - Julia Chacón‐Labella
- Departamento de Medio Ambiente Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, INIA Madrid Spain
| | - Adrián Escudero
- Biodiversity and Conservation Unit, Department of Biology, Geology, Physics and Inorganic Chemistry ESCET, URJC; Móstoles Madrid Spain
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Giordani P, Malaspina P, Benesperi R, Incerti G, Nascimbene J. Functional over-redundancy and vulnerability of lichen communities decouple across spatial scales and environmental severity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 666:22-30. [PMID: 30784819 DOI: 10.1016/j.scitotenv.2019.02.187] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 02/05/2019] [Accepted: 02/12/2019] [Indexed: 06/09/2023]
Abstract
According to the insurance hypothesis, high taxonomic diversity should ensure ecosystem stability because of functional redundancy, whereas reduced functional diversity that results from species loss should affect ecosystem sensitivity, resilience, and vulnerability. However, even in species-rich ecosystems, functional over-redundancy (FOR; i.e., the tendency of most species to cluster into a few over-represented functional entities) in some cases may result in under-representation of many functions, and the ecosystem might become highly vulnerable. Using a stratified random sampling design with nested spatial levels (nine land use strata, 70 plots, 435 trees/rock outcrops, and 9845 quadrats), we recorded the occurrence of over 350 species of epiphytic and rock-dwelling lichens in semi-arid ecosystems in western Sardinia, where solar radiation defines a wide environmental gradient. By accounting for species functional traits, such as growth form, photosynthetic strategies, and reproductive strategies, we obtained 43 functional entities (>60% of all possible combinations) and tested the scale-dependency of FOR and functional vulnerability (FV, i.e., the risk of losing functional entities) by generalized linear mixed models. We found that FOR increased and FV decreased with increasing spatial scale, which supports the hypothesis of a cross-scale functional reinforcement. Decoupling of FOR and FV was far more evident for rock-dwelling compared with epiphytic communities, which reflects differing environmental conditions associated with substrate type. Our results indicate that increased warming and climatic extremes could exacerbate species clustering into the most resistant functional entities and thus enhance FOR at the community level. Therefore, high taxonomic diversity may not ensure systematic buffering of climate change impacts.
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Affiliation(s)
- Paolo Giordani
- Department of Pharmacy, University of Genova, Genova, Italy
| | | | | | - Guido Incerti
- DI4A, Department of Agri-Food, Environmental and Animal Sciences, University of Udine, Udine, Italy.
| | - Juri Nascimbene
- Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, Italy
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Dolezal J, Dvorsky M, Kopecky M, Altman J, Mudrak O, Capkova K, Rehakova K, Macek M, Liancourt P. Functionally distinct assembly of vascular plants colonizing alpine cushions suggests their vulnerability to climate change. ANNALS OF BOTANY 2019; 123:569-578. [PMID: 30541052 PMCID: PMC6417476 DOI: 10.1093/aob/mcy207] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Accepted: 10/20/2018] [Indexed: 06/02/2023]
Abstract
BACKGROUND AND AIMS Alpine cushion plants can initially facilitate other species during ecological succession, but later on can be negatively affected by their development, especially when beneficiaries possess traits allowing them to overrun their host. This can be reinforced by accelerated warming favouring competitively strong species over cold-adapted cushion specialists. However, little empirical research has addressed the trait-based mechanisms of these interactions. The ecological strategies of plants colonizing the cushion plant Thylacospermum caespitosum (Caryophyllaceae), a dominant pioneer of subnival zones, were studied in the Western Himalayas. METHODS To assess whether the cushion colonizers are phylogenetically and functionally distinct, 1668 vegetation samples were collected, both in open ground outside the cushions and inside their live and dead canopies, in two mountain ranges, Karakoram and Little Tibet. More than 50 plant traits related to growth, biomass allocation and resource acquisition were measured for target species, and the phylogenetic relationships of these species were studied [or determined]. KEY RESULTS Species-based trait-environment analysis with phylogenetic correction showed that in both mountain ranges Thylacospermum colonizers are phylogenetically diverse but functionally similar and are functionally different from species preferring bare soil outside cushions. Successful colonizers are fast-growing, clonal graminoids and forbs, penetrating the cushion by rhizomes and stolons. They have higher root-to-shoot ratios, leaf nitrogen and phosphorus concentrations, and soil moisture and nutrient demands, sharing the syndrome of competitive species with broad elevation ranges typical of the late stages of primary succession. In contrast, the species from open ground have traits typical of stress-tolerant specialists from high and dry environments. CONCLUSION Species colonizing tight cushions of T. caespitosum are competitively strong graminoids and herbaceous perennials from alpine grasslands. Since climate change in the Himalayas favours these species, highly specialized subnival cushion plants may face intense competition and a greater risk of decline in the future.
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Affiliation(s)
- Jiri Dolezal
- Institute of Botany, The Czech Academy of Sciences, Průhonice, Czech Republic
- Department of Botany, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
| | - Miroslav Dvorsky
- Institute of Botany, The Czech Academy of Sciences, Průhonice, Czech Republic
| | - Martin Kopecky
- Institute of Botany, The Czech Academy of Sciences, Průhonice, Czech Republic
| | - Jan Altman
- Institute of Botany, The Czech Academy of Sciences, Průhonice, Czech Republic
| | - Ondrej Mudrak
- Institute of Botany, The Czech Academy of Sciences, Průhonice, Czech Republic
| | - Katerina Capkova
- Institute of Botany, The Czech Academy of Sciences, Průhonice, Czech Republic
| | - Klara Rehakova
- Institute of Botany, The Czech Academy of Sciences, Průhonice, Czech Republic
| | - Martin Macek
- Institute of Botany, The Czech Academy of Sciences, Průhonice, Czech Republic
| | - Pierre Liancourt
- Institute of Botany, The Czech Academy of Sciences, Průhonice, Czech Republic
- Department of Evolution and Ecology, University of Tübingen, Tübingen, Germany
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Roy J, Bonneville J, Saccone P, Ibanez S, Albert CH, Boleda M, Gueguen M, Ohlmann M, Rioux D, Clément J, Lavergne S, Geremia RA. Differences in the fungal communities nursed by two genetic groups of the alpine cushion plant, Silene acaulis. Ecol Evol 2018; 8:11568-11581. [PMID: 30598757 PMCID: PMC6303776 DOI: 10.1002/ece3.4606] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 09/14/2018] [Indexed: 11/10/2022] Open
Abstract
Foundation plants shape the composition of local biotic communities and abiotic environments, but the impact of a plant's intraspecific variations on these processes is poorly understood. We examined these links in the alpine cushion moss campion (Silene acaulis) on two neighboring mountain ranges in the French Alps. Genotyping of cushion plants revealed two genetic clusters matching known subspecies. The exscapa subspecies was found on both limestone and granite, while the longiscapa one was only found on limestone. Even on similar limestone bedrock, cushion soils from the two S. acaulis subspecies deeply differed in their impact on soil abiotic conditions. They further strikingly differed from each other and from the surrounding bare soils in fungal community composition. Plant genotype variations accounted for a large part of the fungal composition variability in cushion soils, even when considering geography or soil chemistry, and particularly for the dominant molecular operational taxonomic units (MOTUs). Both saprophytic and biotrophic fungal taxa were related to the MOTUs recurrently associated with a single plant genetic cluster. Moreover, the putative phytopathogens were abundant, and within the same genus (Cladosporium) or species (Pyrenopeziza brassicae), MOTUs showing specificity for each plant subspecies were found. Our study highlights the combined influences of bedrock and plant genotype on fungal recruitment into cushion soils and suggests the coexistence of two mechanisms, an indirect selection resulting from the colonization of an engineered soil by free-living saprobes and a direct selection resulting from direct plant-fungi interactions.
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Affiliation(s)
- Julien Roy
- Laboratoire d’Ecologie Alpine (LECA)University Grenoble AlpesUniversity Savoie Mont BlancCNRS, LECAGrenobleFrance
- Present address:
Institut für Biologie, Ökologie der PflanzenFreie Universität BerlinGermany
| | - Jean‐Marc Bonneville
- Laboratoire d’Ecologie Alpine (LECA)University Grenoble AlpesUniversity Savoie Mont BlancCNRS, LECAGrenobleFrance
| | - Patrick Saccone
- Laboratoire d’Ecologie Alpine (LECA)University Grenoble AlpesUniversity Savoie Mont BlancCNRS, LECAGrenobleFrance
- Present address:
Centre for Polar EcologyUniversity of South BohemiaCeske BudejoviceCzech Republic
| | - Sébastian Ibanez
- Laboratoire d’Ecologie Alpine (LECA)University Grenoble AlpesUniversity Savoie Mont BlancCNRS, LECAGrenobleFrance
| | - Cécile H. Albert
- Laboratoire d’Ecologie Alpine (LECA)University Grenoble AlpesUniversity Savoie Mont BlancCNRS, LECAGrenobleFrance
- Present address:
Aix Marseille Univ, Univ Avignon, CNRS, IMBEMarseilleFrance
| | - Marti Boleda
- Laboratoire d’Ecologie Alpine (LECA)University Grenoble AlpesUniversity Savoie Mont BlancCNRS, LECAGrenobleFrance
| | - Maya Gueguen
- Laboratoire d’Ecologie Alpine (LECA)University Grenoble AlpesUniversity Savoie Mont BlancCNRS, LECAGrenobleFrance
| | - Marc Ohlmann
- Laboratoire d’Ecologie Alpine (LECA)University Grenoble AlpesUniversity Savoie Mont BlancCNRS, LECAGrenobleFrance
| | - Delphine Rioux
- Laboratoire d’Ecologie Alpine (LECA)University Grenoble AlpesUniversity Savoie Mont BlancCNRS, LECAGrenobleFrance
| | - Jean‐Christophe Clément
- Laboratoire d’Ecologie Alpine (LECA)University Grenoble AlpesUniversity Savoie Mont BlancCNRS, LECAGrenobleFrance
- Present address:
CARRTEL, INRA – Université Savoie Mont BlancThonon‐les‐BainsFrance
| | - Sébastien Lavergne
- Laboratoire d’Ecologie Alpine (LECA)University Grenoble AlpesUniversity Savoie Mont BlancCNRS, LECAGrenobleFrance
| | - Roberto A. Geremia
- Laboratoire d’Ecologie Alpine (LECA)University Grenoble AlpesUniversity Savoie Mont BlancCNRS, LECAGrenobleFrance
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Graff P, Aguiar MR, Almeida RJ. Females engage in stronger relationships: positive and negative effects of shrubs are more intense for Poa ligularis females than for males. ANNALS OF BOTANY 2018; 122:435-443. [PMID: 29790914 PMCID: PMC6110346 DOI: 10.1093/aob/mcy085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 04/25/2018] [Indexed: 06/08/2023]
Abstract
Background and Aims Dioecious plants are of particular concern in view of global environmental changes because reproductive females are more sensitive to abiotic stresses, thus compromising population viability. Positive interactions with other plants may counteract the direct effects of any abiotic environmental stress, allowing them to thrive and maintain a viable population in suboptimal habitats, although this process has not been tested for dioecious species. Furthermore, almost no data are available on the outcome of such species interactions and their link with local spatial patterns and sex ratios. Methods We set up a field experiment with Poa ligularis, a dioecious native grass from the arid grasslands of South America. We studied the interaction of male and female plants with cushion shrubs of contrasting ecological strategies. We experimentally limited direct shrub-grass competition for soil moisture and transplanted plants to evaluate the amelioration of abiotic stress by shrub canopies (i.e. sun and wind) on grasses. We also studied the distribution of naturally established female and male plants to infer process-pattern relationships. Key Results Positive canopy effects as well as negative below-ground effects were more intense for females than for males. Deep-rooted Mulinum spinosum shrubs strongly facilitated survival, growth and reproduction of P. ligularis females. Naturally established female plants tended to distribute more closely to Mulinum than co-occurring males. Female growth suffered intensive negative root competition from the shallow-rooted Senecio filaginoides shrub. Conclusions Interactions with other plants may reduce or enhance the effect of abiotic stresses on the seemingly maladapted sex to arid environments. We found that these biased interactions are evident in the current organization of sexes in the field, confirming our experimental findings. Therefore, indirect effects of climate change on population sex ratios may be expected if benefactor species abundances are differentially affected.
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Affiliation(s)
- Pamela Graff
- Universidad de Buenos Aires, Consejo Nacional de lnvestigaciones Cientificas y Técnicas, Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA), Facultad de Agronomía, Buenos Aires, Argentina
| | - Martin R Aguiar
- Universidad de Buenos Aires, Consejo Nacional de lnvestigaciones Cientificas y Técnicas, Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA), Facultad de Agronomía, Buenos Aires, Argentina
| | - Rocio J Almeida
- Universidad de Buenos Aires, Consejo Nacional de lnvestigaciones Cientificas y Técnicas, Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA), Facultad de Agronomía, Buenos Aires, Argentina
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Chardon NI, Wipf S, Rixen C, Beilstein A, Doak DF. Local trampling disturbance effects on alpine plant populations and communities: Negative implications for climate change vulnerability. Ecol Evol 2018; 8:7921-7935. [PMID: 30250673 PMCID: PMC6144962 DOI: 10.1002/ece3.4276] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 04/11/2018] [Accepted: 05/17/2018] [Indexed: 11/21/2022] Open
Abstract
Global change is modifying species communities from local to landscape scales, with alterations in the abiotic and biotic determinants of geographic range limits causing species range shifts along both latitudinal and elevational gradients. An important but often overlooked component of global change is the effect of anthropogenic disturbance, and how it interacts with the effects of climate to affect both species and communities, as well as interspecies interactions, such as facilitation and competition. We examined the effects of frequent human trampling disturbances on alpine plant communities in Switzerland, focusing on the elevational range of the widely distributed cushion plant Silene acaulis and the interactions of this facilitator species with other plants. Examining size distributions and densities, we found that disturbance appears to favor individual Silene growth at middle elevations. However, it has negative effects at the population level, as evidenced by a reduction in population density and reproductive indices. Disturbance synergistically interacts with the effects of elevation to reduce species richness at low and high elevations, an effect not mitigated by Silene. In fact, we find predominantly competitive interactions, both by Silene on its hosted and neighboring species and by neighboring (but not hosted) species on Silene. Our results indicate that disturbance can be beneficial for Silene individual performance, potentially through changes in its neighboring species community. However, possible reduced recruitment in disturbed areas could eventually lead to population declines. While other studies have shown that light to moderate disturbances can maintain high species diversity, our results emphasize that heavier disturbance reduces species richness, diversity, as well as percent cover, and adversely affects cushion plants and that these effects are not substantially reduced by plant-plant interactions. Heavily disturbed alpine systems could therefore be at greater risk for upward encroachment of lower elevation species in a warming world.
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Affiliation(s)
- Nathalie Isabelle Chardon
- Environmental Studies ProgramUniversity of ColoradoBoulderUSA
- Mountain EcosystemsWSL Institute for Snow and Avalanche Research SLFDavosSwitzerland
| | - Sonja Wipf
- Mountain EcosystemsWSL Institute for Snow and Avalanche Research SLFDavosSwitzerland
| | - Christian Rixen
- Mountain EcosystemsWSL Institute for Snow and Avalanche Research SLFDavosSwitzerland
| | - Annabarbara Beilstein
- Mountain EcosystemsWSL Institute for Snow and Avalanche Research SLFDavosSwitzerland
- Department of Environmental Systems ScienceETH ZurichZurichSwitzerland
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Pistón N, Michalet R, Schöb C, Macek P, Armas C, Pugnaire FI. The balance of canopy and soil effects determines intraspecific differences in foundation species’ effects on associated plants. Funct Ecol 2018. [DOI: 10.1111/1365-2435.13139] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nuria Pistón
- Estación Experimental de Zonas Áridas (EEZA‐CSIC) Almería Spain
- Nuria Pistón, Departamento de EcologíaInstituto de BiologiaUniversidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brazil
| | | | - Christian Schöb
- Estación Experimental de Zonas Áridas (EEZA‐CSIC) Almería Spain
- Christian Schöb, Department of Environmental System ScienceSwiss Federal Institute of TechnologyETH Zurich Tannenstrasse 1 8092 Zürich Switzerland
| | - Petr Macek
- Estación Experimental de Zonas Áridas (EEZA‐CSIC) Almería Spain
- Petr Macek, Faculty of ScienceUniversity of South Bohemia Branišovská 1760 CZ‐370 05 České Budějovice Czech Republic
| | - Cristina Armas
- Estación Experimental de Zonas Áridas (EEZA‐CSIC) Almería Spain
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Jiang X, Michalet R, Chen S, Zhao L, Wang X, Wang C, An L, Xiao S. Phenotypic effects of the nurseThylacospermum caespitosumon dependent plant species along regional climate stress gradients. OIKOS 2017. [DOI: 10.1111/oik.04512] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xingpei Jiang
- State Key Laboratory of Grassland and Agro-ecosystems, School of Life Sciences, Lanzhou Univ., 222 Tianshuinan Road; CN-730000 Lanzhou PR China
| | - Richard Michalet
- Univ. of Bordeaux, U.M.R. CNRS, Allée Geoffroy Saint-Hilaire; Pessac France
| | - Shuyan Chen
- Ministry of Education Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Chongqing Univ.; Chongqing PR China
| | - Liang Zhao
- Ministry of Education Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Chongqing Univ.; Chongqing PR China
| | - Xiangtai Wang
- State Key Laboratory of Grassland and Agro-ecosystems, School of Life Sciences, Lanzhou Univ., 222 Tianshuinan Road; CN-730000 Lanzhou PR China
| | - Chenyue Wang
- State Key Laboratory of Grassland and Agro-ecosystems, School of Life Sciences, Lanzhou Univ., 222 Tianshuinan Road; CN-730000 Lanzhou PR China
| | - Lizhe An
- State Key Laboratory of Grassland and Agro-ecosystems, School of Life Sciences, Lanzhou Univ., 222 Tianshuinan Road; CN-730000 Lanzhou PR China
| | - Sa Xiao
- State Key Laboratory of Grassland and Agro-ecosystems, School of Life Sciences, Lanzhou Univ., 222 Tianshuinan Road; CN-730000 Lanzhou PR China
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22
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Anthelme F, Meneses RI, Valero NNH, Pozo P, Dangles O. Fine nurse variations explain discrepancies in the stress-interaction relationship in alpine regions. OIKOS 2017. [DOI: 10.1111/oik.04248] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fabien Anthelme
- Valero, AMAP, IRD, CIRAD, CNRS, INRA, Univ. Montpellier; Montpellier France
| | - Rosa I. Meneses
- Museo Nacional de Historia Natural, Herbario Nacional de Bolivia, Cota Cota; La Paz Bolivia
| | | | - Paola Pozo
- Museo Nacional de Historia Natural, Herbario Nacional de Bolivia, Cota Cota; La Paz Bolivia
- Inst. de Ecología, Univ. Mayor San Andrés, Cota Cota; La Paz Bolivia
| | - Olivier Dangles
- IRD, UMR Evolution Génome Comportement et Ecologie, Univ. Paris-Sud CNRS-Paris-Saclay; Gif-sur-Yvette France
- Facultad de Ciencias Exactas y Naturales, Pontificia Univ. Católica del Ecuador; Quito Ecuador
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Carbohydrate reserves in the facilitator cushion plant Laretia acaulis suggest carbon limitation at high elevation and no negative effects of beneficiary plants. Oecologia 2017; 183:997-1006. [PMID: 28233055 DOI: 10.1007/s00442-017-3840-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 02/10/2017] [Indexed: 10/20/2022]
Abstract
The elevational range of the alpine cushion plant Laretia acaulis (Apiaceae) comprises a cold upper extreme and a dry lower extreme. For this species, we predict reduced growth and increased non-structural carbohydrate (NSC) concentrations (i.e. carbon sink limitation) at both elevational extremes. In a facilitative interaction, these cushions harbor other plant species (beneficiaries). Such interactions appear to reduce reproduction in other cushion species, but not in L. acaulis. However, vegetative effects may be more important in this long-lived species and may be stronger under marginal conditions. We studied growth and NSC concentrations in leaves and stems of L. acaulis collected from cushions along its full elevational range in the Andes of Central Chile. NSC concentrations were lowest and cushions were smaller and much less abundant at the highest elevation. At the lowest elevation, NSC concentrations and cushion sizes were similar to those of intermediate elevations but cushions were somewhat less abundant. NSC concentrations and growth did not change with beneficiary cover at any elevation. Lower NSC concentrations at the upper extreme contradict the sink-limitation hypothesis and may indicate that a lack of warmth is not limiting growth at high-elevation. At the lower extreme, carbon gain and growth do not appear more limiting than at intermediate elevations. The lower population density at both extremes suggests that the regeneration niche exerts important limitations to this species' distribution. The lack of an effect of beneficiaries on reproduction and vegetative performance suggests that the interaction between L. acaulis and its beneficiaries is probably commensalistic.
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