Role of mycorrhizal associations in tree spatial distribution patterns based on size class in an old-growth forest

Sasaki, Takehiro; Konno, Michiko; Hasegawa, Yoichi; Imaji, Aya; Terabaru, M.; Nakamura, Ritaka; Ohira, N.; Matsukura, Kimiyo; Seiwa, Kenji

doi:10.1007/s00442-019-04376-2

Cited by 31 publications

(29 citation statements)

References 54 publications

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“…Indeed, AM plants accumulate relatively more pathogenic fungi in their mycorrhizosphere (55). Furthermore, in temperate and subtropical forests, EcM saplings and adult trees tend to exhibit positive density dependence, whereas AM trees show neutral density dependence (55)(56)(57). A combination of positive density dependence and differences in soil nutrition may lead to clustering of EcM tree seedlings around adult EcM trees and a lack of AM tree saplings around conspecific adult AM trees (19,57).…”

Section: Negative Microbial Feedbackmentioning

confidence: 99%

“…Furthermore, in temperate and subtropical forests, EcM saplings and adult trees tend to exhibit positive density dependence, whereas AM trees show neutral density dependence (55)(56)(57). A combination of positive density dependence and differences in soil nutrition may lead to clustering of EcM tree seedlings around adult EcM trees and a lack of AM tree saplings around conspecific adult AM trees (19,57). Over time, aggregation of individuals belonging to a single species can lead to monodominance (>60% of basal area or stems belong to a single species), which is a particularly common phenomenon in EcM plant communities (58).…”

Section: Negative Microbial Feedbackmentioning

confidence: 99%

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How mycorrhizal associations drive plant population and community biology

Tedersoo

Bahram

Zobel

2020

Science

628

427

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Mycorrhizal fungi provide plants with a range of benefits, including mineral nutrients and protection from stress and pathogens. Here we synthesize current information about how the presence and type of mycorrhizal association affect plant communities. We argue that mycorrhizal fungi regulate seedling establishment and species coexistence through stabilizing and equalizing mechanisms such as soil nutrient partitioning, feedback to soil antagonists, differential mycorrhizal benefits, and nutrient trade. Mycorrhizal fungi have strong effects on plant population and community biology, with mycorrhizal type–specific effects on seed dispersal, seedling establishment, and soil niche differentiation, as well as interspecific and intraspecific competition and hence plant diversity.

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Section: Negative Microbial Feedbackmentioning

confidence: 99%

Section: Negative Microbial Feedbackmentioning

confidence: 99%

How mycorrhizal associations drive plant population and community biology

Tedersoo

Bahram

Zobel

2020

Science

628

427

View full text Add to dashboard Cite

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“…We used nine plant species: five AM-associated species (Magnolia obovata, Cerasus jamasakura, Viburnum dilatatum, Viburnum furcatum, and Aesculus turbinata) and four ECM-associated species (Pinus densiflora, Betula platyphylla, Quercus crispula, and Quercus serrata) [12][13][14][15][16]. The natural population densities of ECM-associated species are higher than those of AM-associated species (Table S1) [17].…”

Section: Experimental Speciesmentioning

confidence: 99%

Evolutionary relations between mycorrhizal symbiosis and plant–plant communication in trees

Yamawo

Hagiwara

Yoshida

et al. 2022

Preprint

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Ecological factors that drive the evolution of plant-plant communication via volatile organic compounds (VOCs) have not been elucidated. Here, we examined the relationship between type of mycorrhizal symbiosis (arbuscular mycorrhiza, AM; ectomycorrhizal mycorrhiza, ECM) and plant-plant communication within tree species. We hypothesized that ECM promotes plant-plant communication among conspecific individuals in trees, because it promotes their cooccurrence through positive plant-soil feedback. We tested communication using saplings of nine tree species with either AM or ECM, either exposed for 10 days to volatiles from an injured conspecific or not exposed. We evaluated the number of insect-damaged leaves and the area of leaf damage after 1 and 2 months in the field. Most exposed ECM-associated trees had less leaf damage than controls. However, AM-associated trees did not differ in leaf damage between treatments. We combined our results with those of previous studies and analysed the evolutionary relation between mycorrhizal type and the presence or absence of plant-plant communication within tree species. ECM symbiosis is associated with the evolution of plant-plant communication within species. These results suggest that the evolution of types of mycorrhizal symbiosis associates with the evolution of plant-plant communications within tree species.

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“…Deriving stand size class distributions based on DBH measurements is commonplace in production forestry through to ecological surveys of stand biomass. Manual tree measurement and obtaining the geolocation data required to study size class distribution requires considerable resources and few studies include geolocation of individual trees within a study site [44]. Instead, a common field method for estimating the size class distribution is to extrapolate from sub-plots that may be 30 m × 30 m or less in size [45].…”

Section: Heterogeneity At Landscape/stand Levelmentioning

confidence: 99%

Exploring the Variability of Tropical Savanna Tree Structural Allometry with Terrestrial Laser Scanning

et al. 2020

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Individual tree carbon stock estimates typically rely on allometric scaling relationships established between field-measured stem diameter (DBH) and destructively harvested biomass. The use of DBH-based allometric equations to estimate the carbon stored over larger areas therefore, assumes that tree architecture, including branching and crown structures, are consistent for a given DBH, and that minor variations cancel out at the plot scale. We aimed to explore the degree of structural variation present at the individual tree level across a range of size-classes. We used terrestrial laser scanning (TLS) to measure the 3D structure of each tree in a 1 ha savanna plot, with coincident field-inventory. We found that stem reconstructions from TLS captured both the spatial distribution pattern and the DBH of individual trees with high confidence when compared with manual measurements (R2 = 0.98, RMSE = 0.0102 m). Our exploration of the relationship between DBH, crown size and tree height revealed significant variability in savanna tree crown structure (measured as crown area). These findings question the reliability of DBH-based allometric equations for adequately representing diversity in tree architecture, and therefore carbon storage, in tropical savannas. However, adoption of TLS outside environmental research has been slow due to considerable capital cost and monitoring programs often continue to rely on sub-plot monitoring and traditional allometric equations. A central aspect of our study explores the utility of a lower-cost TLS system not generally used for vegetation surveys. We discuss the potential benefits of alternative TLS-based approaches, such as explicit modelling of tree structure or voxel-based analyses, to capture the diverse 3D structures of savanna trees. Our research highlights structural heterogeneity as a source of uncertainty in savanna tree carbon estimates and demonstrates the potential for greater inclusion of cost-effective TLS technology in national monitoring programs.

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Role of mycorrhizal associations in tree spatial distribution patterns based on size class in an old-growth forest

Cited by 31 publications

References 54 publications

How mycorrhizal associations drive plant population and community biology

How mycorrhizal associations drive plant population and community biology

Evolutionary relations between mycorrhizal symbiosis and plant–plant communication in trees

Exploring the Variability of Tropical Savanna Tree Structural Allometry with Terrestrial Laser Scanning

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