Geographical distribution of myxomycetes living on Cryptomeria japonica bark in Japan

Takahashi, Kazunari; Harakon, Yuichi; Fukasawa, Yu

doi:10.1016/j.myc.2018.02.005

Cited by 7 publications

(12 citation statements)

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“…A previous nationwide study found 30 species (including varieties) of myxomycetes on the bark of C. japonica trees (n = 188, Takahashi et al, 2018 ) and another study found 28 species (n = 176, Takahashi & Harakon, 2018 ). The most abundant species were P. rigida > C. confusa > E. berkeleyanum .…”

Section: Discussionmentioning

confidence: 93%

“…The most abundant species were P. rigida > C. confusa > E. berkeleyanum . The bark of C. japonica trees generally retains strong acidic condition, such as average pH with standard deviation of 3.7 ± 0.3 ( Takahashi et al, 2018 ) and 3.7 ± 0.2 ( Takahashi & Harakon, 2018 ). In the present study, slightly less acidity was observed on the bark, that is, the average pH was 3.9 ± 0.3 (n = 74) and ranged from 3.3 to 4.6.…”

Section: Discussionmentioning

confidence: 99%

“…Ordination of eight myxomycete communities in two survey occasions was estimated using nonmetric multidimensional scaling (NMDS) based on Bray-Curtis similarity in PAST, which is a useful method for comparing community structures ( Takahashi et al., 2018 ). The NMDS scores show the similarity among myxomycete communities, which were plotted according to the NMDS scores of the first two axes as shown in Figure 3 .…”

Section: Methodsmentioning

confidence: 99%

“…The bark of Cryptomeria japonica (L. f.) D. Don. trees effects as a habitat for several myxomycete species in the forests of the Japanese archipelago (Takahashi, Harakon, & Fukasawa, 2018). The endemic spe-cies, C. japonica, is distributed throughout Japan, and C. japonica plantations account for approximately 45% of the total area of artificial forests in Japan, because it is the main source of timber for construction work (The Forest Agency; https://www.rinya.maff.…”

Section: Introductionmentioning

confidence: 99%

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Association between corticolous myxomycetes and tree vitality in Cryptomeria japonica

Takahashi

Fukasawa

2022

Mycoscience

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The bark of live trees provides an important microhabitat for corticolous myxomycetes. However, the association between the presence of myxomycetes and health of host trees has not been studied in detail. In this study, we aimed to investigate the relationship between tree vitality and myxomycetes on the bark of Cryptomeria japonica trees in a montane forest in western Japan. The vitality of trees was categorized into four grades based on the visual assessment of tree shape and leaf density in the upper branches. Myxomycetes on the bark surface were examined using the moist chamber culture method. A decline in tree vitality increased bark pH and decreased electrical conductivity of the bark exudates. Seventeen myxomycete species were recorded in 74 C. japonica trees. The structure of myxomycete communities varied between healthy and unhealthy trees, and species diversity increased as the vitality declined. The relative abundance of Cribraria confusa decreased as the vitality declined, while that of Paradiacheopsis solitaria increased. The results showed that acidophilic myxomycetes grew on healthy C. japonica bark, but changes in bark pH associated with vitality decline led to the weakening of acidity and shifted the community structure; thus, corticolous myxomycete diversity was enhanced as tree vitality decline.

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Association between corticolous myxomycetes and tree vitality in Cryptomeria japonica

Takahashi

Fukasawa

2022

Mycoscience

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“…The smallest cities were Takashima City, Shiga Prefecture, with 46,284 people (66 people/km 2 , 2023), and Ureshino City, Saga Prefecture, with 25,129 people (199 Spatial environmental condition at each survey site was determined using aerial photographs following a previous study (Ukawa & Katoh, 2007), generally based on differences in land cover as classified using the classification scheme of the Geographical Survey Institute (http://maps.gsi.go.jp/, accessed on August 1, 2019). Urbanization was estimated from the composition of various landscape types (i.e., the extent of specific land-use types) surrounding the survey sites, following previous studies (Takahashi & Yano, 2021;Takahashi, 2021). A 1-km 2 grid comprising 100 cells of 1 ha was overlaid on each survey site, with the site itself at the center of the grid.…”

Section: Study Sitesmentioning

confidence: 99%

Myxomycetes on the bark of living Metasequoia glyptostroboides trees and their distribution along a rural-urban gradient

TAKAHASHI

2024

Mycoscience

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Myxomycetes are fungus-like amoeboid protists that primarily inhabit plant detritus and humus in terrestrial ecosystems (Stephenson, 2011), preferring habitats such as dead wood, litter, soil, and living tree bark, based on differences in the substrates and microenvironments (Novozhilov et al., 2022). Their fruited sporangia mostly disperse spores by wind (Kamono et al., 2009) and reproduce on various substrates. Some species known as bark-dwelling myxomycetes (corticolous myxomycetes) extend their habitat to the bark surface of living trees, where they complete their life cycle (Keller & Brooks, 1973). Although these species mostly possess minute fruiting bodies with an ephemeral existence and are rarely observed in the field, they can be reliably detected using the moist chamber culture technique (Michell, 1977).Trees of the species Metasequoia glyptostroboides Hu et W. C. Cheng were found as fossils from the Cretaceous by Dr. Shigeru Miki (Tsukagoshi et al., 2011) and later discovered as an extant plant in China (Hu, 1946;Hu & Cheng, 1948); the species is therefore regarded as a "living fossil." Even though the species became extinct in the Japanese archipelago during the 4 th Cenozoic period (Momohara, 2011), present specimens in Japan derive from 100 seedlings that were a present from Dr. R. W. Chaney from the USA (Tsukagoshi et al., 2011). The species was then propagated to schools, companies, and the public through cuttings planted throughout the country and was used as a garden and roadside tree in green areas in conurbations, local cities, rural areas, and in afforestation to examine its usefulness for timber production (Tsukagoshi, 2016). The bark surface provides a habitat for many myxomycetes that grow on bark surface (Takahashi, 2014).Urbanization is presumed to cause various environmental changes (Grimm et al., 2008;Güneralp & Seto, 2013) along with habitat loss and fragmentation, resulting in impacts on biodiversity and ecological processes (Liu et al., 2016). Urbanization has increased globally and is rapidly spreading. The urban population in three conurbations in Japan is expected to reach 56.7% of the country's total population by 2050 (Ministry of Internal Affairs and Communications, www.soumu.go.jp). Understanding the effects of urbanization on biodiversity is thus of vital importance. Although the effects of urbanization on species richness have been studied and discussed for large visible plants, animals, birds, and arthropods (Faeth et al., 2011;McKinney, 2008), the importance of saproxylic microbes and the effects of urbanization on microbial diversity remain to be studied in detail (Korhonen et al., 2022). As a great variety of microbes, such as bacteria, fungi, and viruses, including the protozoan myxomycetes, inhabit human living spaces,

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Distribution characteristics of myxomycetes among substrates, study areas, and forest types in central China

Gao

Yao

et al. 2022

Mycol Progress

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Geographical distribution of myxomycetes living on Cryptomeria japonica bark in Japan

Cited by 7 publications

References 24 publications

Association between corticolous myxomycetes and tree vitality in <i>Cryptomeria japonica</i>

Association between corticolous myxomycetes and tree vitality in <i>Cryptomeria japonica</i>

Myxomycetes on the bark of living <i>Metasequoia glyptostroboides</i> trees and their distribution along a rural-urban gradient

Distribution characteristics of myxomycetes among substrates, study areas, and forest types in central China

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