1
|
Kewessa G, Dejene T, Martín-Pinto P. Untangling the effect that replacing Ethiopia's natural forests with exotic tree plantations has on arbuscular mycorrhizal fungi. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 942:173718. [PMID: 38848925 DOI: 10.1016/j.scitotenv.2024.173718] [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: 03/20/2024] [Revised: 05/24/2024] [Accepted: 05/31/2024] [Indexed: 06/09/2024]
Abstract
Arbuscular mycorrhizal fungi (AMF) have a broad distribution and establish symbiotic relationships with vascular plants in tropical regions. They play a crucial role in enhancing plant nutrient absorption, mitigating pathogenic infections, and boosting the resilience of host plants to abiotic stresses, including drought under specific conditions. Many natural forests in Ethiopia are being replaced by monospecific plantations. However, the impact of these actions on AMF is unknown and, despite their ecological functions, AMF communities in various forest systems have not been thoroughly investigated. In this study, we assessed soil AMF communities in natural and plantation forests by DNA metabarcoding of the ITS2 rDNA region and assessed the influence of climate and environmental variables on the AMF community. In total, 193 AMF operational taxonomic units (OTUs), comprising nine families and 15 genera, were recorded. Glomerales was the dominant order (67.9 % of AMF OTUs) and Septoglomus fuscum, Diversispora insculpta, and Funneliformis mosseae were the dominant species. AMF were more abundant in natural forests than in plantation forests and the composition of AMF communities differed significantly from those of plantation forest. In plantation forests, soil pH, organic carbon, total nitrogen, and available phosphorus significantly influenced the composition of AMF communities, whereas in natural forest, electrical conductivity, annual rainfall, and cumulative rainfall before sample collection were significantly correlated with AMF. SIMPER analysis identified the AMF responsible for composition variances among different forest types, with the Glomeraceae family being the most significant contributor, accounting for nearly 60 % of the dissimilarity. Our findings further our understanding of the ecological niche function and the role of AMF in Ethiopia's natural forest systems and highlight the importance of prioritizing the sustainable development of degraded natural forests rather than plantations to ensure the preservation of habitats conducive to maintaining various AMF communities when devising conservation and management strategies.
Collapse
Affiliation(s)
- Gonfa Kewessa
- Sustainable Forest Management Research Institute, University of Valladolid, Avda. Madrid 44, 34071 Palencia, Spain; Department of Forestry, Ambo University, P.O. Box 19, Ambo, Ethiopia
| | - Tatek Dejene
- Sustainable Forest Management Research Institute, University of Valladolid, Avda. Madrid 44, 34071 Palencia, Spain; Ethiopian Forestry Development, Addis Ababa, Ethiopia
| | - Pablo Martín-Pinto
- Sustainable Forest Management Research Institute, University of Valladolid, Avda. Madrid 44, 34071 Palencia, Spain.
| |
Collapse
|
2
|
Xing H, Chen W, Liu Y, Cahill JF. Local Community Assembly Mechanisms and the Size of Species Pool Jointly Explain the Beta Diversity of Soil Fungi. MICROBIAL ECOLOGY 2024; 87:58. [PMID: 38602532 PMCID: PMC11008070 DOI: 10.1007/s00248-024-02374-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 04/01/2024] [Indexed: 04/12/2024]
Abstract
Fungi play vital regulatory roles in terrestrial ecosystems. Local community assembly mechanisms, including deterministic and stochastic processes, as well as the size of regional species pools (gamma diversity), typically influence overall soil microbial community beta diversity patterns. However, there is limited evidence supporting their direct and indirect effects on beta diversity of different soil fungal functional groups in forest ecosystems. To address this gap, we collected 1606 soil samples from a 25-ha subtropical forest plot in southern China. Our goal was to determine the direct effects and indirect effects of regional species pools on the beta diversity of soil fungi, specifically arbuscular mycorrhizal (AM), ectomycorrhizal (EcM), plant-pathogenic, and saprotrophic fungi. We quantified the effects of soil properties, mycorrhizal tree abundances, and topographical factors on soil fungal diversity. The beta diversity of plant-pathogenic fungi was predominantly influenced by the size of the species pool. In contrast, the beta diversity of EcM fungi was primarily driven indirectly through community assembly processes. Neither of them had significant effects on the beta diversity of AM and saprotrophic fungi. Our results highlight that the direct and indirect effects of species pools on the beta diversity of soil functional groups of fungi can significantly differ even within a relatively small area. They also demonstrate the independent and combined effects of various factors in regulating the diversities of soil functional groups of fungi. Consequently, it is crucial to study the fungal community not only as a whole but also by considering different functional groups within the community.
Collapse
Affiliation(s)
- Hua Xing
- ECNU-Alberta Joint Lab for Biodiversity Study, Tiantong Forest Ecosystem National Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, 500 Dongchuan Road, Minhuang District, 200241, Shanghai, China
- Department of Biological Sciences, University of Alberta, Edmonton, AB, T6G 2E9, Canada
| | - Wuwei Chen
- Qingyuan Bureau Natural Resources and Planning, Qingyuan, 323800, China
| | - Yu Liu
- ECNU-Alberta Joint Lab for Biodiversity Study, Tiantong Forest Ecosystem National Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, 500 Dongchuan Road, Minhuang District, 200241, Shanghai, China.
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200082, China.
| | - James F Cahill
- Department of Biological Sciences, University of Alberta, Edmonton, AB, T6G 2E9, Canada
| |
Collapse
|
3
|
Hiiesalu I, Schweichhart J, Angel R, Davison J, Doležal J, Kopecký M, Macek M, Řehakova K. Plant-symbiotic fungal diversity tracks variation in vegetation and the abiotic environment along an extended elevational gradient in the Himalayas. FEMS Microbiol Ecol 2023; 99:fiad092. [PMID: 37562924 DOI: 10.1093/femsec/fiad092] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 05/30/2023] [Accepted: 08/07/2023] [Indexed: 08/12/2023] Open
Abstract
Arbuscular mycorrhizal (AM) fungi can benefit plants under environmental stress, and influence plant adaptation to warmer climates. However, very little is known about the ecology of these fungi in alpine environments. We sampled plant roots along a large fraction (1941-6150 m asl (above sea level)) of the longest terrestrial elevational gradient on Earth and used DNA metabarcoding to identify AM fungi. We hypothesized that AM fungal alpha and beta diversity decreases with increasing elevation, and that different vegetation types comprise dissimilar communities, with cultured (putatively ruderal) taxa increasingly represented at high elevations. We found that the alpha diversity of AM fungal communities declined linearly with elevation, whereas within-site taxon turnover (beta diversity) was unimodally related to elevation. The composition of AM fungal communities differed between vegetation types and was influenced by elevation, mean annual temperature, and precipitation. In general, Glomeraceae taxa dominated at all elevations and vegetation types; however, higher elevations were associated with increased presence of Acaulosporaceae, Ambisporaceae, and Claroideoglomeraceae. Contrary to our expectation, the proportion of cultured AM fungal taxa in communities decreased with elevation. These results suggest that, in this system, climate-induced shifts in habitat conditions may facilitate more diverse AM fungal communities at higher elevations but could also favour ruderal taxa.
Collapse
Affiliation(s)
- Inga Hiiesalu
- Institute of Ecology and Earth Sciences, University of Tartu, J. Liivi 2, 50 409 Tartu, Estonia
| | - Johannes Schweichhart
- Biology Centre of the CAS, Institute of Soil Biology and Biochemistry, Na Sádkách 702/7 , 370 05 České Budějovice, Czech Republic
- Faculty of Science, University of South Bohemia, Branišovská 1160/31, 370 05 České Budějovice, Czech Republic
| | - Roey Angel
- Biology Centre of the CAS, Institute of Soil Biology and Biochemistry, Na Sádkách 702/7 , 370 05 České Budějovice, Czech Republic
| | - John Davison
- Institute of Ecology and Earth Sciences, University of Tartu, J. Liivi 2, 50 409 Tartu, Estonia
| | - Jiři Doležal
- Institute of Botany of the CAS, Dukelská 135, 379 01 Třeboň, Czech Republic
- Faculty of Science, University of South Bohemia, Branišovská 1160/31, 370 05 České Budějovice, Czech Republic
| | - Martin Kopecký
- Institute of Botany of the CAS, Zámek 1, 252 43 Průhonice, Czech Republic
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 21, Praha 6, Czech Republic
| | - Martin Macek
- Institute of Botany of the CAS, Zámek 1, 252 43 Průhonice, Czech Republic
| | - Klára Řehakova
- Biology Centre of the CAS, Institute of Hydrobiology, Na Sádkách 702/7, 370 05 České Budějovice, Czech Republic
- Institute of Botany of the CAS, Dukelská 135, 379 01 Třeboň, Czech Republic
| |
Collapse
|
4
|
Ma X, Qu H, Liu X, Zhang Y, Chao L, Liu H, Bao Y. Changes of root AMF community structure and colonization levels under distribution pattern of geographical substitute for four Stipa species in arid steppe. Microbiol Res 2023; 271:127371. [PMID: 37011510 DOI: 10.1016/j.micres.2023.127371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/27/2023] [Accepted: 03/30/2023] [Indexed: 04/03/2023]
Abstract
The establishment of symbiotic relationship between arbuscular mycorrhizal fungi (AMF) and roots is a mutually beneficial process and plays an important role in plant succession in ecosystems. However, there is less understanding of information about the AMF community in roots under vegetation succession on a large regional scale, especially the spatial variation in the AMF community and its potential ecological functions. Here, we elucidated the spatial variations in root AMF community structure and root colonization along a distribution pattern of four zonal Stipa species in arid and semiarid grassland systems and explored key factors regulating AMF structure and mycorrhizal symbiotic interactions. Four Stipa species established a symbiosis with AMF, and annual mean temperature (MAT) and soil fertility were the main positive and negative driving factors of AM colonization, respectively. The Chao richness and Shannon diversity of AMF community in the root system of Stipa species tended to increase firstly from S. baicalensis to S. grandis and then decreased from S. grandis to S. breviflora. While evenness of root AMF and root colonization showed a trend of increasing from S. baicalensis to S. breviflora, and biodiversity was principally affected by soil total phosphorus (TP), organic phosphorus (Po) and MAT. It is emphasized that Stipa species have certain dependence on AMF, especially in a warming environment, and the root AMF community structure among the four Stipa taxa was different. Additionally, the composition and spatial distribution of root AMF in host plants varied with MAT, annual mean precipitation (MAP), TP and host plant species. These results will broaden our understanding of the relationship between plant and AMF communities and their ecological role, and provide basic information for the application of AMF in the conservation and rehabilitation of forage plants in degraded semiarid grasslands.
Collapse
Affiliation(s)
- Xiaodan Ma
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010010, PR China
| | - Hanting Qu
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010010, PR China
| | - Xinyan Liu
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010010, PR China
| | - Yan Zhang
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010010, PR China
| | - Lumeng Chao
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010010, PR China
| | - Haijing Liu
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010010, PR China.
| | - Yuying Bao
- Key Laboratory of Forage and Endemic Crop Biotechnology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, PR China; State Key Laboratory of Reproductive Regulatory and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010010, PR China.
| |
Collapse
|
5
|
Cook K, Taylor AD, Sharma J, Taylor DL. Inter-annual Persistence of Canopy Fungi Driven by Abundance Despite High Spatial Turnover. MICROBIAL ECOLOGY 2022:10.1007/s00248-022-02104-7. [PMID: 36048179 DOI: 10.1007/s00248-022-02104-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
While it is now well established that fungal community composition varies spatially at a variety of scales, temporal turnover of fungi is less well understood. Here we studied inter-annual community compositional changes of fungi in a rainforest tree canopy environment. We tracked fungal community shifts over 3 years in three substrate types (live bryophytes, dead bryophytes, and host tree bark) and compared these changes to amounts of community turnover seen at small spatial scales in the same system. The effect of substrate type on fungal community composition was stronger than that of sampling year, which was very small but significant. Although levels of temporal turnover varied among substrates, with greater turnover in live bryophytes than other substrates, the amount of turnover from year to year was comparable to what is seen at spatial distances between 5 and 9 cm for the same substrate. Stability of communities was largely driven by a few fungi with high relative abundances. A majority of fungal occurrences were at low relative abundances (≤ 0.1%). These fungi tended to be short lived and persisted to following years ≤ 50% of the time, depending on substrate. Their presence and persistence are likely impacted by stochastic processes like dispersal limitation and disturbance. Most samples contained only one or a few fungi at high relative abundance (≥ 10%) that persisted half or more of the time. These more abundant and persistent fungi are expected to have sustained functional interactions within the canopy ecosystem.
Collapse
Affiliation(s)
- Kel Cook
- Department of Biology, University of New Mexico, Castetter Hall 1480, MSC03-2020, 219 Yale Blvd NE, Albuquerque, NM, 87131-0001, USA.
| | - Andrew D Taylor
- Department of Biology, University of Hawai'i at Manoa, 2538 McCarthy Mall, Edmondson Hall 216, Honolulu, HI, 96822, USA
| | - Jyotsna Sharma
- Department of Plant and Soil Science, Texas Tech University, Bayer Plant Science Building, Room 219, 2911 15th Street, Mail Stop 2122, Lubbock, TX, 79409-2122, USA
| | - D Lee Taylor
- Department of Biology, University of New Mexico, Castetter Hall 1480, MSC03-2020, 219 Yale Blvd NE, Albuquerque, NM, 87131-0001, USA
| |
Collapse
|
6
|
Tipton AG, Nelsen D, Koziol L, Duell EB, House G, Wilson GWT, Schultz PA, Bever JD. Arbuscular Mycorrhizal Fungi Taxa Show Variable Patterns of Micro-Scale Dispersal in Prairie Restorations. Front Microbiol 2022; 13:827293. [PMID: 35935243 PMCID: PMC9355535 DOI: 10.3389/fmicb.2022.827293] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 06/23/2022] [Indexed: 11/18/2022] Open
Abstract
Human land use disturbance is a major contributor to the loss of natural plant communities, and this is particularly true in areas used for agriculture, such as the Midwestern tallgrass prairies of the United States. Previous work has shown that arbuscular mycorrhizal fungi (AMF) additions can increase native plant survival and success in plant community restorations, but the dispersal of AMF in these systems is poorly understood. In this study, we examined the dispersal of AMF taxa inoculated into four tallgrass prairie restorations. At each site, we inoculated native plant species with greenhouse-cultured native AMF taxa or whole soil collected from a nearby unplowed prairie. We monitored AMF dispersal, AMF biomass, plant growth, and plant community composition, at different distances from inoculation. In two sites, we assessed the role of plant hosts in dispersal, by placing known AMF hosts in a “bridge” and “island” pattern on either side of the inoculation points. We found that AMF taxa differ in their dispersal ability, with some taxa spreading to 2-m in the first year and others remaining closer to the inoculation point. We also found evidence that AMF spread altered non-inoculated neighboring plant growth and community composition in certain sites. These results represent the most comprehensive attempt to date to evaluate AMF spread.
Collapse
Affiliation(s)
- Alice G. Tipton
- Department of Biology, St. Louis University, St. Louis, MO, United States
- Kansas Biological Survey and Center for Ecological Research, University of Kansas, Lawrence, KS, United States
- *Correspondence: Alice G. Tipton
| | - Donald Nelsen
- Kansas Biological Survey and Center for Ecological Research, University of Kansas, Lawrence, KS, United States
| | - Liz Koziol
- Kansas Biological Survey and Center for Ecological Research, University of Kansas, Lawrence, KS, United States
| | - Eric B. Duell
- Kansas Biological Survey and Center for Ecological Research, University of Kansas, Lawrence, KS, United States
- Natural Resource Ecology and Management, Oklahoma State University, Stillwater, OK, United States
| | - Geoffrey House
- Department of Biology, Indiana University, Bloomington, IN, United States
- NEON, Boulder, CO, United States
| | - Gail W. T. Wilson
- Natural Resource Ecology and Management, Oklahoma State University, Stillwater, OK, United States
| | - Peggy A. Schultz
- Kansas Biological Survey and Center for Ecological Research, University of Kansas, Lawrence, KS, United States
- Environmental Studies Program, University of Kansas, Lawrence, KS, United States
| | - James D. Bever
- Kansas Biological Survey and Center for Ecological Research, University of Kansas, Lawrence, KS, United States
- Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, United States
| |
Collapse
|
7
|
Cook K, Sharma J, Taylor AD, Herriott IC, Taylor DL. Epiphytic fungal communities vary by substrate type and at sub-meter spatial scales. Mol Ecol 2022; 31:1879-1891. [PMID: 35060231 DOI: 10.1111/mec.16358] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 12/17/2021] [Accepted: 01/07/2022] [Indexed: 11/30/2022]
Abstract
Fungal species have numerous important environmental functions. Where these functions occur will depend on how fungi are spatially distributed, but spatial structures of fungal communities are largely unknown, especially in understudied hyperdiverse tropical tree canopy systems. We explore fungal communities in a Costa Rican tropical rainforest canopy, with a focus on local-scale spatial structure and substrate specificity of fungi. Samples of ~1 cm3 were collected from 135 points along 5 adjacent tree branches, with inter-sample distances from 1 to 800 cm, and dissected into four substrates: outer host tree bark, inner bark, dead bryophytes, and living bryophytes. We sequenced the ITS2 region to characterize total fungal communities. Fungal community composition and diversity varied among substrate types, even when multiple substrates were in direct contact. Fungi were most diverse in living bryophytes, with 39% of all OTUs found exclusively in this substrate, and the least diverse in inner bark. Fungal communities had significant positive spatial autocorrelation and distance decay of similarity only at distances less than one meter. Similarity among samples declines by half in less than ten cm, and even at these short distances, similarities are low with few OTUs shared among samples. These results indicate that community turnover is high and occurs at very small spatial scales, with any two locations sharing very few fungi in common. High heterogeneity of fungal communities in space and among substrates may have implications for the distributions, population dynamics, and diversity of other tree canopy organisms, including epiphytic plants.
Collapse
Affiliation(s)
- Kel Cook
- Department of Biology, University of New Mexico, Castetter Hall 1480, MSC03-2020, 219 Yale Blvd NE, Albuquerque, NM, 87131-0001, USA
| | - Jyotsna Sharma
- Department of Plant and Soil Science, Texas Tech University, Bayer Plant Science Building, Room 219, 2911 15th Street, Mail Stop 2122, Lubbock, TX, 79409-2122, USA
| | - Andrew D Taylor
- Department of Biology, University of Hawai'i at Manoa, 2538 McCarthy Mall, Edmondson Hall 216, Honolulu, HI, 96822, USA
| | - Ian Charold Herriott
- Institute of Arctic Biology, University of Alaska, 311 Irving I Building, Fairbanks, AK, 99775, USA
| | - D Lee Taylor
- Department of Biology, University of New Mexico, Castetter Hall 1480, MSC03-2020, 219 Yale Blvd NE, Albuquerque, NM, 87131-0001, USA
| |
Collapse
|
8
|
Alrajhei K, Saleh I, Abu‐Dieyeh MH. Biodiversity of arbuscular mycorrhizal fungi in plant roots and rhizosphere soil from different arid land environment of Qatar. PLANT DIRECT 2022; 6:e369. [PMID: 35028492 PMCID: PMC8743365 DOI: 10.1002/pld3.369] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/13/2021] [Accepted: 11/24/2021] [Indexed: 06/14/2023]
Abstract
Recently more attention has been observed toward the role of arbuscular mycorrhizal fungi (AMF) in plant growth. Qatar belongs to the Arabian Gulf region with hot and dry climatic conditions. The study aims to investigate the species composition and abundance of AMF in Qatar, rhizosphere soil samples, and roots of plants from 12 families and 8 different locations. The AMF were identified based on the sequencing of the polymerase chain reaction (PCR) product of the amplified conserved ITS region. The reported AMF infection rate was found to vary with location and plant species. Tamarix aphylla recorded the highest AMF infection rate (100%), followed by Blepharis ciliaris (98%) and Sporobolus ioclados (92%). AMF spore counts ranged from 29.3 spores in Blepharis ciliaris to 643 spores/100 g soil in Fagonia indica. No correlation was detected between colonization rate and spore counts. While all AMF identified at species levels were reported in other regions, new species are still expected since some were identified only at higher taxonomic levels. Claroideoglomus drummondii and Rhizophagus irregularis were the most widespread while Claroideoglomus claroideum and Diversispora aurantia were the least present. Our results fill the gap of knowledge of AMF in the region and opens new research toward its future applications for sustainable agriculture.
Collapse
Affiliation(s)
- Khazna Alrajhei
- Biological Science Program, Department of Biological and Environmental Sciences, College of Arts and SciencesQatar UniversityDohaQatar
| | - Iman Saleh
- Biological Science Program, Department of Biological and Environmental Sciences, College of Arts and SciencesQatar UniversityDohaQatar
| | - Mohammed H. Abu‐Dieyeh
- Biological Science Program, Department of Biological and Environmental Sciences, College of Arts and SciencesQatar UniversityDohaQatar
| |
Collapse
|
9
|
Ceola G, Goss-Souza D, Alves J, Alves da Silva A, Stürmer SL, Baretta D, Sousa JP, Klauberg-Filho O. Biogeographic Patterns of Arbuscular Mycorrhizal Fungal Communities Along a Land-Use Intensification Gradient in the Subtropical Atlantic Forest Biome. MICROBIAL ECOLOGY 2021; 82:942-960. [PMID: 33656687 DOI: 10.1007/s00248-021-01721-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 02/14/2021] [Indexed: 06/12/2023]
Abstract
Information concerning arbuscular mycorrhizal (AM) fungal geographical distribution in tropical and subtropical soils from the Atlantic Forest (a global hotspot of biodiversity) are scarce and often restricted to the evaluation of richness and abundance of AM fungal species at specific ecosystems or local landscapes. In this study, we hypothesized that AM fungal diversity and community composition in subtropical soils would display fundamental differences in their geographical patterns, shaped by spatial distance and land-use change, at local and regional scales. AM fungal community composition was examined by spore-based taxonomic analysis, using soil trap cultures. Acaulospora koskei and Glomus were found as generalists, regardless of mesoregions and land uses. Other Acaulospora species were also found generalists within mesoregions. Land-use change and intensification did not influence AM fungal composition, partially rejecting our first hypothesis. We then calculated the distance-decay of similarities among pairs of AM fungal communities and the distance-decay relationship within and over mesoregions. We also performed the Mantel test and redundancy analysis to discriminate the main environmental drivers of AM fungal diversity and composition turnover. Overall, we found significant distance-decays for all land uses. We also observed a distance-decay relationship within the mesoregion scale (< 104 km) and these changes were correlated mainly to soil type (not land use), with the secondary influence of both total organic carbon and clay contents. AM fungal species distribution presented significant distance-decays, regardless of land uses, which was indicative of dispersal limitation, a stochastic neutral process. Although, we found evidence that, coupled with dispersal limitation, niche differentiation also played a role in structuring AM fungal communities, driven by long-term historical contingencies, as represented by soil type, resulting from different soil origin and mineralogy across mesoregions.
Collapse
Affiliation(s)
- Gessiane Ceola
- Department of Soils and Natural Resources, Santa Catarina State University, Lages, SC, 88520-000, Brazil
| | - Dennis Goss-Souza
- Department of Soils and Natural Resources, Santa Catarina State University, Lages, SC, 88520-000, Brazil
| | - Joana Alves
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, Coimbra, 3000-456, Portugal
| | - António Alves da Silva
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, Coimbra, 3000-456, Portugal
| | - Sidney Luiz Stürmer
- Departament of Natural Sciences, Regional University of Blumenau, Blumenau, SC, 89030-903, Brazil
| | - Dilmar Baretta
- Department of Soils and Sustainability, Santa Catarina State University, Chapecó, SC, 89815-630, Brazil
| | - José Paulo Sousa
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, Coimbra, 3000-456, Portugal
| | - Osmar Klauberg-Filho
- Department of Soils and Natural Resources, Santa Catarina State University, Lages, SC, 88520-000, Brazil.
- Agroveterinary Centre, Santa Catarina State University, Av. Luis de Camões, 2090, Lages, SC, 88520-000, Brazil.
| |
Collapse
|
10
|
Ksiazek‐Mikenas K, Chaudhary VB, Larkin DJ, Skogen KA. A habitat analog approach establishes native plant communities on green roofs. Ecosphere 2021. [DOI: 10.1002/ecs2.3754] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Affiliation(s)
- Kelly Ksiazek‐Mikenas
- Department of Biology Elmhurst University Elmhurst Illinois USA
- Department of Plant Biology and Conservation Northwestern University Evanston Illinois USA
- Plant Biology and Conservation Chicago Botanic Garden Glencoe Illinois USA
| | - V. Bala Chaudhary
- Department of Environmental Studies Dartmouth College Hanover New Hampshire 03755 USA
| | - Daniel J. Larkin
- Department of Fisheries, Wildlife and Conservation Biology University of Minnesota St. Paul Minnesota USA
| | - Krissa A. Skogen
- Department of Plant Biology and Conservation Northwestern University Evanston Illinois USA
- Plant Biology and Conservation Chicago Botanic Garden Glencoe Illinois USA
| |
Collapse
|
11
|
Dos Passos JH, Maia LC, de Assis DMA, da Silva JA, Oehl F, da Silva IR. Arbuscular Mycorrhizal Fungal Community Structure in the Rhizosphere of Three Plant Species of Crystalline and Sedimentary Areas in the Brazilian Dry Forest. MICROBIAL ECOLOGY 2021; 82:104-121. [PMID: 32761501 DOI: 10.1007/s00248-020-01557-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 07/09/2020] [Indexed: 06/11/2023]
Abstract
The Brazilian dry forest (Caatinga) is located in one of the world's largest tropical semiarid regions, and it occurs on two large geological environments named the crystalline and sedimentary basins. In order to determine the structure and the main drivers of the composition of communities of arbuscular mycorrhizal fungi (AMF) in the Caatinga, we collected soil samples from the rhizosphere of Jatropha mollissima, J. mutabilis, and Mimosa tenuiflora, species that occur in crystalline and sedimentary areas. Ninety-six AMF taxa were identified from soils collected directly in the field and trap cultures. Acaulospora, Glomus, and Rhizoglomus represented almost 49% of the taxon richness. The composition of the AMF communities differed between the crystalline and sedimentary areas and between the rhizospheres of the three plant species. Coarse sand, total sand, natural clay, calcium, soil particles density, flocculation, pH, and base saturation were the principal edaphic variables related to the distribution of these organisms. We registered nine and 17 AMF species classified as indicators, for the geological environments and plant species, respectively. Glomerospores of Glomerales predominated in crystalline basins, whereas glomerospores of Gigasporales prevailed in sedimentary areas; among the plant species, lower number of glomerospores of Archaeosporales and Glomerales was recorded in the rhizosphere of J. mollissima. The results show that the AMF community composition is shaped by geological environments and plant hosts. In addition, soil characteristics, mainly physical attributes, significantly influence the structure of Glomeromycota communities occurring in areas of the Brazilian semiarid.
Collapse
Affiliation(s)
- José Hilton Dos Passos
- Programa de Pós-Graduacao em Biologia de Fungos, Universidade Federal de Pernambuco, Av. da Engenharia, s/n, Cidade Universitaria, Recife, PE, 50740-600, Brazil
| | - Leonor Costa Maia
- Programa de Pós-Graduacao em Biologia de Fungos, Universidade Federal de Pernambuco, Av. da Engenharia, s/n, Cidade Universitaria, Recife, PE, 50740-600, Brazil
| | - Daniele Magna Azevedo de Assis
- Programa de Pós-Graduacao em Biologia de Fungos, Universidade Federal de Pernambuco, Av. da Engenharia, s/n, Cidade Universitaria, Recife, PE, 50740-600, Brazil.
| | - Jailma Alves da Silva
- Programa de Pós-Graduacao em Biologia de Fungos, Universidade Federal de Pernambuco, Av. da Engenharia, s/n, Cidade Universitaria, Recife, PE, 50740-600, Brazil
| | - Fritz Oehl
- Agroscope, Competence Division for Plants and Plant Products, Ecotoxicology, Müller-Thurgau-Strasse 29, CH-8820, Wädenswil, Switzerland
| | - Iolanda Ramalho da Silva
- Sierra Nevada Research Institute, University of California, Merced, 5200 N Lake Rd, CA, 95343, Merced, USA
| |
Collapse
|
12
|
Guillén A. Preparation of Samples for Characterization of Arbuscular Mycorrhizal Fungi. Methods Mol Biol 2021; 2232:43-51. [PMID: 33161538 DOI: 10.1007/978-1-0716-1040-4_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Arbuscular mycorrhizal fungi (AMF) are an important element of the plant microbiome as they establish an endosymbiotic relationship with the roots of most plant species. This association enhances access to nutrients and water for plants, and provides the fungus with plant-derived organic carbon. In this chapter, I describe a range of methods to work with AMF including: soil sampling; isolation of AMF propagules (spores, sporocarps, roots, and mycelium) by a wet sieving and centrifugation in a sucrose solution; trap (from field soil with AMF spores) and one-species pot cultures (from AMF spores divided into morphotypes); staining of mycorrhizae in plant roots; and production of diagnostic slides. These methods are widely used in taxonomic and ecological studies to characterize the morphology of AMF.
Collapse
Affiliation(s)
- Alberto Guillén
- ERIBiotecMed and Department of Plant Biology, University of Valencia, Burjassot, Spain.
| |
Collapse
|
13
|
Delavaux CS, Schemanski JL, House GL, Tipton AG, Sikes B, Bever JD. Root pathogen diversity and composition varies with climate in undisturbed grasslands, but less so in anthropogenically disturbed grasslands. ISME JOURNAL 2020; 15:304-317. [PMID: 32958849 PMCID: PMC7852655 DOI: 10.1038/s41396-020-00783-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 08/25/2020] [Accepted: 09/10/2020] [Indexed: 02/07/2023]
Abstract
Soil-borne pathogens structure plant communities, shaping their diversity, and through these effects may mediate plant responses to climate change and disturbance. Little is known, however, about the environmental determinants of plant pathogen communities. Therefore, we explored the impact of climate gradients and anthropogenic disturbance on root-associated pathogens in grasslands. We examined the community structure of two pathogenic groups-fungal pathogens and oomycetes-in undisturbed and anthropogenically disturbed grasslands across a natural precipitation and temperature gradient in the Midwestern USA. In undisturbed grasslands, precipitation and temperature gradients were important predictors of pathogen community richness and composition. Oomycete richness increased with precipitation, while fungal pathogen richness depended on an interaction of precipitation and temperature, with precipitation increasing richness most with higher temperatures. Disturbance altered plant pathogen composition and precipitation and temperature had a reduced effect on pathogen richness and composition in disturbed grasslands. Because pathogens can mediate plant community diversity and structure, the sensitivity of pathogens to disturbance and climate suggests that degradation of the pathogen community may mediate loss, or limit restoration of, native plant diversity in disturbed grasslands, and may modify plant community response to climate change.
Collapse
Affiliation(s)
- Camille S Delavaux
- Department of Ecology and Evolutionary Biology, The University of Kansas, 2041 Haworth Hall, 1200 Sunnyside Avenue, Lawrence, KS, 66045, USA. .,Kansas Biological Survey, The University of Kansas, 106 Higuchi Hall, 2101 Constant Ave, Lawrence, KS, 66047, USA.
| | - Josh L Schemanski
- Department of Ecology and Evolutionary Biology, The University of Kansas, 2041 Haworth Hall, 1200 Sunnyside Avenue, Lawrence, KS, 66045, USA.,Kansas Biological Survey, The University of Kansas, 106 Higuchi Hall, 2101 Constant Ave, Lawrence, KS, 66047, USA
| | - Geoffrey L House
- National Ecological Observatory Network, Boulder, CO, 80301, USA
| | - Alice G Tipton
- Department of Science, Technology, and Mathematics, Lincoln University, 821 Taylor Drive, 205 Daniel Hall, Jefferson City, MO, 65101, USA
| | - Benjamin Sikes
- Department of Ecology and Evolutionary Biology, The University of Kansas, 2041 Haworth Hall, 1200 Sunnyside Avenue, Lawrence, KS, 66045, USA.,Kansas Biological Survey, The University of Kansas, 106 Higuchi Hall, 2101 Constant Ave, Lawrence, KS, 66047, USA
| | - James D Bever
- Department of Ecology and Evolutionary Biology, The University of Kansas, 2041 Haworth Hall, 1200 Sunnyside Avenue, Lawrence, KS, 66045, USA.,Kansas Biological Survey, The University of Kansas, 106 Higuchi Hall, 2101 Constant Ave, Lawrence, KS, 66047, USA
| |
Collapse
|
14
|
Deveautour C, Chieppa J, Nielsen UN, Boer MM, Mitchell C, Horn S, Power SA, Guillen A, Bennett AE, Powell JR. Biogeography of arbuscular mycorrhizal fungal spore traits along an aridity gradient, and responses to experimental rainfall manipulation. FUNGAL ECOL 2020. [DOI: 10.1016/j.funeco.2019.100899] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
15
|
Identifying Mechanisms for Successful Ecological Restoration with Salvaged Topsoil in Coastal Sage Scrub Communities. DIVERSITY 2020. [DOI: 10.3390/d12040150] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Although aboveground metrics remain the standard, restoring functional ecosystems should promote both aboveground and belowground biotic communities. Restoration using salvaged soil—removal and translocation of topsoil from areas planned for development, with subsequent deposition at degraded sites—is an alternative to traditional methods. Salvaged soil contains both seed and spore banks, which may holistically augment restoration. Salvaged soil methods may reduce non-native germination by burying non-native seeds, increase native diversity by adding native seeds, or transfer soil microbiomes, including arbuscular mycorrhizal fungi (AMF), to recipient sites. We transferred soil to three degraded recipient sites and monitored soil microbes, using flow cytometry and molecular analyses, and characterized the plant community composition. Our findings suggest that salvaged soil at depths ≥5 cm reduced non-native grass cover and increased native plant density and species richness. Bacterial abundance at recipient sites were statistically equivalent to donor sites in abundance. Overall, topsoil additions affected AMF alpha diversity and community composition and increased rhizophilic AMF richness. Because salvaged soil restoration combines multiple soil components, including native plant and microbial propagules, it may promote both aboveground and belowground qualities of the donor site, when applying this method for restoring invaded and degraded ecosystems.
Collapse
|
16
|
Effects of Forest Composition and Disturbance on Arbuscular Mycorrhizae Spore Density, Arbuscular Mycorrhizae Root Colonization and Soil Carbon Stocks in a Dry Afromontane Forest in Northern Ethiopia. DIVERSITY 2020. [DOI: 10.3390/d12040133] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We investigated arbuscular mycorrhizal fungi (AMF) spore density and root colonization in three distinct dry Afromontane forest plant communities, representing differing levels of disturbance and soil properties. Soil and root samples were collected from sixty-five 50 × 50-m plots from four plant communities. We collected data for AMF spore density, AMF root colonization and soil organic carbon stocks in 0–25 and 25–50 cm soil depth ranges. AMF spore density, and root colonization differed significantly among plant communities. The least disturbed Juniperus procera–Maytenus senegalensis (Jupr-Mase) plant community, which contained high tree and shrub density, had the highest AMF spore density, root colonization and soil carbon stocks. The most disturbed Cadia purpurea–Opuntia ficus-indica (Capu-Opfi) community which contained the lowest tree and shrub density supported the lowest AMF spore density, root colonization and soil carbon stocks. There was no significant difference in spore density between the two soil depths, but AMF root colonization was significantly higher in the upper soil than in the subsoil (p < 0.001). The difference in soil properties was not uniform between plant communities. Conserving remnant dry Afromontane forests and restoring the degraded forests are critical to improve and maintain forest ecosystem functioning and sustain ecosystem services.
Collapse
|
17
|
Chaudhary VB, Akland K, Johnson NC, Bowker MA. Do soil inoculants accelerate dryland restoration? A simultaneous assessment of biocrusts and mycorrhizal fungi. Restor Ecol 2020. [DOI: 10.1111/rec.13088] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- V. Bala Chaudhary
- Department of Environmental Science and Studies DePaul University 1110 West Belden Avenue Chicago IL 60614 U.S.A
| | - Kristine Akland
- Department of Biological Sciences Northern Arizona University 617 S. Beaver Flagstaff AZ 86011 U.S.A
| | - Nancy C. Johnson
- Department of Biological Sciences Northern Arizona University 617 S. Beaver Flagstaff AZ 86011 U.S.A
- School of Earth and Sustainability Northern Arizona University 625 S. Knoles Drive Flagstaff AZ 86011 U.S.A
| | - Matthew A. Bowker
- School of Forestry Northern Arizona University 200 E. Pine Knoll Drive, Box 15018 Flagstaff AZ 86011 U.S.A
| |
Collapse
|
18
|
Chaudhary VB, Sandall EL, Lazarski MV. Urban mycorrhizas: predicting arbuscular mycorrhizal abundance in green roofs. FUNGAL ECOL 2019. [DOI: 10.1016/j.funeco.2018.03.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
19
|
Weber SE, Diez JM, Andrews LV, Goulden ML, Aronson EL, Allen MF. Responses of arbuscular mycorrhizal fungi to multiple coinciding global change drivers. FUNGAL ECOL 2019. [DOI: 10.1016/j.funeco.2018.11.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
20
|
Marinho F, Oehl F, da Silva IR, Coyne D, Veras JSDN, Maia LC. High diversity of arbuscular mycorrhizal fungi in natural and anthropized sites of a Brazilian tropical dry forest (Caatinga). FUNGAL ECOL 2019. [DOI: 10.1016/j.funeco.2018.11.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
21
|
Guillén A, Mesquita-Joanes F, Peris JB, Arrillaga I. Effects of environmental and temporal factors on Glomeromycotina spores in sand dunes along the Gulf of Valencia (Spain). FUNGAL ECOL 2019. [DOI: 10.1016/j.funeco.2018.07.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
22
|
Reyes-Jaramillo I, Chimal-Sánchez E, Salmerón-Castro JY, Vázquez-Pérez N, Varela-Fregoso L. Comunidad de hongos micorrizógenos arbusculares (Glomeromycota) asociada con agaves mezcaleros de Oaxaca y su relación con algunas propiedades edáficas. REV MEX BIODIVERS 2019. [DOI: 10.22201/ib.20078706e.2019.90.2777] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
|
23
|
Mahmoudi N, Cruz C, Mahdhi M, Mars M, Caeiro MF. Arbuscular mycorrhizal fungi in soil, roots and rhizosphere of Medicago truncatula: diversity and heterogeneity under semi-arid conditions. PeerJ 2019; 7:e6401. [PMID: 30842895 PMCID: PMC6398376 DOI: 10.7717/peerj.6401] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 01/05/2019] [Indexed: 11/20/2022] Open
Abstract
Mycorrhizal symbioses are considered indicators of ecosystem biodiversity. However, their diversity and relevance in arid and semi-arid ecosystems are poorly understood. This study addressed this subject, the main objective being to evaluate arbuscular mycorrhizal fungi (AMF) diversity and heterogeneity in a semi-arid region. Samples of bulk and rhizosphere soil and fine roots of Medicago truncatula were collected at four different sites with the same aridity index (6.1), in Bou-Hedma National Park, Tunisia, a semi-arid ecosystem. AMF taxa were assessed by 454- pyrosequencing and identified by BLAST matching of operational taxonomic units (OTUs) against the MaarjAM database, targeting AMF SSU rRNA gene diversity. Roots were the hotspots of AMF diversity (107 OTUs out of a total of 138). Of the 138 OTUs, 113 found correspondence in the MaarjAM database, with 32 AMF virtual taxa (VTX),19 Site-exclusive (SE) and 13 common to at least two sites (Non-site exclusive, NSE); the remaining 25 OTUs grouped in 16 putative new AMF taxa (pNTX), each one consisting of OTUs sharing pairwise distances not higher than 3%. We found a high diversity and heterogeneity of AMF across the four sites, which showed, in a regression analysis, significant relation to six out of the eight environmental parameters evaluated: grazing activity and soil texture, electrical conductivity, organic matter, total phosphorus and total nitrogen. AMF colonization of plants also presented significant differences among the four sites, as well as spore density, microbial biomass and several enzymatic activities (dehydrogenase, β-glucosidase and phosphatase) evaluated in rhizosphere soils. The four sites clustered in two groups in a hierarchical clustering evaluation based on their AMF diversity (total numbers of OTU, VTX and pNTX) and the parameters referred above. The crucial role of abiotic factors, other than aridity index, on AMF community composition, was evidenced by the high heterogeneity found between AMF communities across sites under identical aridity conditions.
Collapse
Affiliation(s)
- Neji Mahmoudi
- Faculté des Sciences de Gabès, Unité de recherche, Biodiversité et Valorisation des Bio-ressources en Zones Arides (BVBZA), Erriadh Zrig, Tunisie
| | - Cristina Cruz
- Faculdade de Ciências da Universidade de Lisboa, Centre for Ecology, Evolution and Environmental Changes (cE3c), Lisboa, Portugal
| | - Mosbah Mahdhi
- Center for Environmental Research and Studies, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Mohamed Mars
- Faculté des Sciences de Gabès, Unité de recherche, Biodiversité et Valorisation des Bio-ressources en Zones Arides (BVBZA), Erriadh Zrig, Tunisie
| | - Maria F. Caeiro
- Faculdade de Ciências da Universidade de Lisboa, Centro de Estudos do Ambiente e do Mar (CESAM), Lisboa, Portugal
| |
Collapse
|
24
|
Rasmussen PU, Hugerth LW, Blanchet FG, Andersson AF, Lindahl BD, Tack AJM. Multiscale patterns and drivers of arbuscular mycorrhizal fungal communities in the roots and root-associated soil of a wild perennial herb. THE NEW PHYTOLOGIST 2018; 220:1248-1261. [PMID: 29573431 PMCID: PMC6282561 DOI: 10.1111/nph.15088] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 02/11/2018] [Indexed: 05/12/2023]
Abstract
Arbuscular mycorrhizal (AM) fungi form diverse communities and are known to influence above-ground community dynamics and biodiversity. However, the multiscale patterns and drivers of AM fungal composition and diversity are still poorly understood. We sequenced DNA markers from roots and root-associated soil from Plantago lanceolata plants collected across multiple spatial scales to allow comparison of AM fungal communities among neighbouring plants, plant subpopulations, nearby plant populations, and regions. We also measured soil nutrients, temperature, humidity, and community composition of neighbouring plants and nonAM root-associated fungi. AM fungal communities were already highly dissimilar among neighbouring plants (c. 30 cm apart), albeit with a high variation in the degree of similarity at this small spatial scale. AM fungal communities were increasingly, and more consistently, dissimilar at larger spatial scales. Spatial structure and environmental drivers explained a similar percentage of the variation, from 7% to 25%. A large fraction of the variation remained unexplained, which may be a result of unmeasured environmental variables, species interactions and stochastic processes. We conclude that AM fungal communities are highly variable among nearby plants. AM fungi may therefore play a major role in maintaining small-scale variation in community dynamics and biodiversity.
Collapse
Affiliation(s)
- Pil U. Rasmussen
- Department of EcologyEnvironment and Plant SciencesStockholm UniversitySE‐106 91StockholmSweden
| | - Luisa W. Hugerth
- School of BiotechnologyScience for Life LaboratoryKTH Royal Institute of TechnologyPO Box 1031SE‐171 21SolnaSweden
- Centre for Translational Microbiome ResearchDepartment of Molecular, Tumor and Cell BiologyScience for Life LaboratoryKarolinska Institutet171 65SolnaSweden
| | - F. Guillaume Blanchet
- Département de BiologieFaculté des SciencesUniversité de Sherbrooke2500 Boulevard UniversitéSherbrookeQCJ1K 2R1Canada
| | - Anders F. Andersson
- School of BiotechnologyScience for Life LaboratoryKTH Royal Institute of TechnologyPO Box 1031SE‐171 21SolnaSweden
| | - Björn D. Lindahl
- Department of Soil and EnvironmentSwedish University of Agricultural SciencesBox 7014SE‐750 07UppsalaSweden
| | - Ayco J. M. Tack
- Department of EcologyEnvironment and Plant SciencesStockholm UniversitySE‐106 91StockholmSweden
| |
Collapse
|
25
|
Sousa NMF, Veresoglou SD, Oehl F, Rillig MC, Maia LC. Predictors of Arbuscular Mycorrhizal Fungal Communities in the Brazilian Tropical Dry Forest. MICROBIAL ECOLOGY 2018; 75:447-458. [PMID: 28779294 DOI: 10.1007/s00248-017-1042-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 07/10/2017] [Indexed: 06/07/2023]
Abstract
Arbuscular mycorrhizal fungi (AMF) are symbiotic fungi with a broad distribution, and many taxa have physiological and ecological adaptations to specific environments, including semiarid ecosystems. Our aim was to address regional distribution patterns of AMF communities in such semiarid environments based on spore morphological techniques. We assessed AMF spores at the bottom and top of inselbergs distributed throughout the tropical dry forest in the Northeast region of Brazil. Across 10 replicate inselbergs and the surrounding area, spanning a range of altitude between 140 and 2000 m, we scored the AMF soil diversity and properties in 52 plots. We fitted parsimonious ordination analyses and variance partitioning models to determine the environmental factors which explained the variation in AMF community, based on morphological spore analysis. The diversity of AMF was similar at the bottom and top of inselbergs; however, we detected high variation in abundance and richness across sites. We formulated a parsimonious richness model that used physical soil factors as predictors. The AMF community structure could be best explained through the variables coarse and total sand, iron, organic matter, potassium, silt, and sodium which together accounted for 17.8% of total variance. Several AMF species were indicators of either deficiency or high values of specific soil properties. We demonstrated that habitat isolation of the inselbergs compared with surrounding areas did not trigger differences in AMF communities in semiarid regions of Brazil. At the regional scale, soil predictors across sites drove the distribution of symbiotic mycorrhizal fungi.
Collapse
Affiliation(s)
- Natália M F Sousa
- Programa de Pós-Graduação em Ciências Biológicas, Departamento de Micologia, Universidade Federal de Pernambuco, Av. da Engenharia s/n, Cidade Universitária, Recife, Pernambuco, Brazil.
| | - Stavros D Veresoglou
- Institut für Biologie, Freie Universität Berlin, Altensteinstr 6, 14195, Berlin, Germany
| | - Fritz Oehl
- Ecotoxicology, Agroscope Reckenholz-Agroscope, Wädenswil, CH-8820, Zürich, Switzerland
| | - Matthias C Rillig
- Ecotoxicology, Agroscope Reckenholz-Agroscope, Wädenswil, CH-8820, Zürich, Switzerland
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Altensteinstr. 34, 14196, Berlin, Germany
| | - Leonor C Maia
- Programa de Pós-Graduação em Ciências Biológicas, Departamento de Micologia, Universidade Federal de Pernambuco, Av. da Engenharia s/n, Cidade Universitária, Recife, Pernambuco, Brazil
| |
Collapse
|
26
|
Hernández-Zamudio G, Sáenz-Mata J, Moreno-Reséndez A, Castañeda-Gaytán G, Ogaz A, Carballar-Hernández S, Hernández-Cuevas L. [Temporal diversity dynamics of the arbuscular mycorrhizal fungi of Larrea tridentata (Sesse & Mocino ex DC) Coville in a semi-arid ecosystem]. Rev Argent Microbiol 2017; 50:301-310. [PMID: 29223919 DOI: 10.1016/j.ram.2017.07.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 07/04/2017] [Accepted: 07/21/2017] [Indexed: 12/30/2022] Open
Abstract
Arbuscular mycorrhizal fungi (AMF) of arid and semiarid ecosystems are important for the development of plants that grow under biotic stress in wild or in agro-ecosystems. There is little information on the temporal diversity of these organisms in perennial plants from arid ecosystems in northern Mexico. On this study, the mycorrhizal colonization and the temporal diversity of AMF in the rhizosphere of Larrea tridentata, perennial plant abundant in the Chihuahuan Desert region were explored. Samples of the rhizosphere and roots of fifteen plants in each of the three sampling dates during the 2015 year were obtained. A total of 17 species of HMA belonging to 12 genera and 7 families within the phylum Glomeromycota in all three sampling dates were found. Funneliformis geosporum was the dominant species belonging to the family Glomeraceae which possess the highest genera number on L. tridentata. The highest mycorrhization percentage was in February with 83.22, followed by September and May with 75.27 and 65.27%, respectively. A maximum of 16 AM fungal species were isolated and identified from L. tridentata rhizosphere in February, 15 species in May and 12 species in September. Statistical analysis showed significant differences between sampling dates in the spores number.
Collapse
Affiliation(s)
- Genoveva Hernández-Zamudio
- Departamento de Agroecología de la Coordinación de Carreras Agronómicas, Universidad Autónoma Agraria Antonio Narro, Unidad Laguna, Torreón, Coahuila, México
| | - Jorge Sáenz-Mata
- Facultad de Ciencias Biológicas, Universidad Juárez del Estado de Durango, Gómez Palacio, Durango, México.
| | - Alejandro Moreno-Reséndez
- Departamento de Suelos de la Coordinación de Carreras Agronómicas, Universidad Autónoma Agraria Antonio Narro, Unidad Laguna, Torreón, Coahuila, México
| | - Gamaliel Castañeda-Gaytán
- Facultad de Ciencias Biológicas, Universidad Juárez del Estado de Durango, Gómez Palacio, Durango, México
| | - Alfredo Ogaz
- Departamento de Suelos de la Coordinación de Carreras Agronómicas, Universidad Autónoma Agraria Antonio Narro, Unidad Laguna, Torreón, Coahuila, México
| | - Santos Carballar-Hernández
- Área de Microbiología, Posgrado de Edafología, Colegio de Posgraduados-Montecillo, Montecillo, Estado de México, México
| | - Laura Hernández-Cuevas
- Centro de Investigación en Genética y Ambiente, Posgrado en Ciencias Biológicas, Universidad Autónoma de Tlaxcala, Tlaxcala, México
| |
Collapse
|
27
|
Chaudhary VB, Cuenca G, Johnson NC. Tropical‐temperate comparison of landscape‐scale arbuscular mycorrhizal fungal species distributions. DIVERS DISTRIB 2017. [DOI: 10.1111/ddi.12664] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- V. Bala Chaudhary
- Department of Environmental Science and Studies DePaul University Chicago IL USA
| | - Gisela Cuenca
- Instituto Venezolano de Investigaciones Científicas Centro de Ecología Caracas Venezuela
| | - Nancy C. Johnson
- Department of Biological Sciences School of Earth Sciences and Environmental Sustainability Northern Arizona University Flagstaff AZ USA
| |
Collapse
|
28
|
Delavaux CS, Camenzind T, Homeier J, Jiménez-Paz R, Ashton M, Queenborough SA. Nutrient enrichment effects on mycorrhizal fungi in an Andean tropical montane Forest. MYCORRHIZA 2017; 27:311-319. [PMID: 27924430 DOI: 10.1007/s00572-016-0749-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 11/21/2016] [Indexed: 06/06/2023]
Abstract
Nitrogen (N) and phosphorus (P) deposition are increasing worldwide largely due to increased fertilizer use and fossil fuel combustion. Most work with N and P deposition in natural ecosystems has focused on temperate, highly industrialized, regions. Tropical regions are becoming more developed, releasing large amounts of these nutrients into the atmosphere. Nutrient enrichment in nutrient-poor systems such as tropical montane forest can represent a relatively large shift in nutrient availability, especially for sensitive microorganisms such as arbuscular mycorrhizal fungi (AMF). These symbiotic fungi are particularly critical, given their key role in ecosystem processes affecting plant community structure and function.To better understand the consequences of nutrient deposition in plant communities, a long-term nutrient addition experiment was set up in a tropical montane forest in the Andes of southern Ecuador. In this study, we investigated the impacts of 7 years of elevated N and P on AMF root colonization potential (AMF-RCP) through a greenhouse bait plant method in which we quantified root colonization. We also examined the relationship between AMF-RCP and rarefied tree diversity.After 7 years of nutrient addition, AMF-RCP was negatively correlated with soil P, positively correlated with soil N, and positively correlated with rarefied tree diversity. Our results show that AMF in this tropical montane forest are directly affected by soil N and P concentrations, but may also be indirectly impacted by shifts in rarefied tree diversity. Our research also highlights the need to fully understand the benefits and drawbacks of using different sampling methods (e.g., AMF-RCP versus direct root sampling) to robustly examine AMF-plant interactions in the future.
Collapse
Affiliation(s)
- Camille S Delavaux
- Yale School of Forestry and Environmental Studies, Yale University, 195 Prospect St, New Haven, CT, 06511, USA.
- Ecology and Evolutionary Biology, University of Kansas, Room 9, Takeru Higuchi Hall, Lawrence, KS, 66047, USA.
| | - Tessa Camenzind
- Institute of Biology, Freie Universität Berlin, Altensteinstr. 6, 14195, Berlin, Germany
- Berlin- Brandenburg Institute of Advanced Biodiversity Research, Plant Ecology, 14195, Berlin, Germany
| | - Jürgen Homeier
- Albrecht von Haller Institute of Plant Sciences, University of Göttingen, Untere Karspüle 2, 37073, Göttingen, Germany
| | - Rosa Jiménez-Paz
- Laboratorio de Ecología de Plantas, Escuela de Ciencias Biológicas, Pontificia Universidad Católica del Ecuador, Av. 12 de octubre 1076 y Roca, Apdo. 17-01-2184, Quito, Ecuador
| | - Mark Ashton
- Yale School of Forestry and Environmental Studies, Yale University, 195 Prospect St, New Haven, CT, 06511, USA
| | - Simon A Queenborough
- Yale School of Forestry and Environmental Studies, Yale University, 195 Prospect St, New Haven, CT, 06511, USA
| |
Collapse
|
29
|
Soil Characteristics Driving Arbuscular Mycorrhizal Fungal Communities in Semiarid Mediterranean Soils. Appl Environ Microbiol 2016; 82:3348-3356. [PMID: 27016567 DOI: 10.1128/aem.03982-15] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 03/21/2016] [Indexed: 01/29/2023] Open
Abstract
UNLABELLED We investigated communities of arbuscular mycorrhizal fungi (AMF) in the roots and the rhizosphere soil of Brachypodium retusum in six different natural soils under field conditions. We explored phylogenetic patterns of AMF composition using indicator species analyses to find AMF associated with a given habitat (root versus rhizosphere) or soil type. We tested whether the AMF characteristics of different habitats or contrasting soils were more closely related than expected by chance. Then we used principal-component analysis and multivariate analysis of variance to test for the relative contribution of each factor in explaining the variation in fungal community composition. Finally, we used redundancy analysis to identify the soil properties that significantly explained the differences in AMF communities across soil types. The results pointed out a tendency of AMF communities in roots to be closely related and different from those in the rhizosphere soil. The indicator species analyses revealed AMF associated with rhizosphere soil and the root habitat. Soil type also determined the distribution of AMF communities in soils, and this effect could not be attributed to a single soil characteristic, as at least three soil properties related to microbial activity, i.e., pH and levels of two micronutrients (Mn and Zn), played significant roles in triggering AMF populations. IMPORTANCE Communities of arbuscular mycorrhizal fungi (AMF) are main components of soil biota that can determine the productivity of ecosystems. These fungal assemblages vary across host plants and ecosystems, but the main ecological processes that shape the structures of these communities are still largely unknown. A field study in six different soil types from semiarid areas revealed that AMF communities are significantly influenced by habitat (soil versus roots) and soil type. In addition, three soil properties related to microbiological activity (i.e., pH and manganese and zinc levels) were the main factors triggering the distribution of AMF. These results contribute to a better understanding of the ecological factors that can shape AMF communities, an important soil microbial group that affects multiple ecosystem functions.
Collapse
|
30
|
Chimal-Sánchez E, Araiza-Jacinto ML, Román-Cárdenas VJ. EL EFECTO DEL FUEGO EN LA RIQUEZA DE ESPECIES DE HONGOS MICORRIZÓGENOS ARBUSCULARES ASOCIADA A PLANTAS DE MATORRAL XERÓFILO EN EL PARQUE ECOLÓGICO “CUBITOS”. TIP REVISTA ESPECIALIZADA EN CIENCIAS QUÍMICO-BIOLÓGICAS 2015. [DOI: 10.1016/j.recqb.2015.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|