Article
Soil Science
Rui Hu, Takashi Hirano, Kaho Sakaguchi, Syunpei Yamashita, Rui Cui, Lifei Sun, Naishen Liang
Summary: This study measured CH4 flux with and without plant roots in a regenerating deciduous forest, and found that the soil was a CH4 sink throughout the experimental period. The presence of roots significantly enhanced CH4 uptake by improving soil aeration. The CH4 uptake rate varied seasonally and showed significant spatial variation due to differences in soil properties. Machine learning approaches, such as Random Forest, showed potential for investigating the dynamic variation in soil CH4 flux using continuous and high-resolution data.
SOIL BIOLOGY & BIOCHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Yu Fukasawa, Kimiyo Matsukura
Summary: The relationship between fungal community assemblies and substrate quality in different stages of wood decay significantly impacts the fungal species richness and weight loss of wood substrate. Early fungal communities exhibit neutral or negative relationships between species richness and wood decay, while late communities generally show significant negative relationships between the two. Differences in fungal communities and wood quality during wood decomposition play a key role in the fungal diversity-decomposition relationship.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Genki Katata, Takashi Yamaguchi, Makoto Watanabe, Keitaro Fukushima, Masataka Nakayama, Hirohiko Nagano, Jun Koarashi, Ryunosuke Tateno, Tomohiro Kubota
Summary: Forest fragmentation can increase the deposition of atmospheric ammonia (NH3) from agricultural areas, affecting the spatial variability of nitrogen (Nr) deposition within the forest. This study found that NH3 deposition dominated the annual total nitrogen deposition to tree canopies in a Japanese fragmented forest. Additionally, agricultural activities near the forest enhanced the retention of NH4+ in the tree canopy, leading to higher growth rates of trees and understory vegetation at the forest edge.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Forestry
Noviana Budianti, Hiromi Mizunaga, Atsuhiro Iio
Summary: Crown-level green chromatic coordinate derived from UAV images poorly explained inter- and intra-species variations in spring leaf phenology, possibly due to early leaf emergence in below-crown vegetation. When influence of below-crown vegetation was removed from UAV images, estimates for leaf expansion and falling dates were more accurate.
Article
Agronomy
Felix Seidel, M. Larry C. Lopez, Eleonora Bonifacio, Hiroko Kurokawa, Toshiro Yamanaka, Luisella Celi
Summary: The present study aimed to assess the phosphorus allocation patterns of four tree species during different phenological stages and its relationship with nitrogen concentrations. It was found that nitrogen in plant tissues correlated well with their phosphorus partitioning, and the increase of soil ammonium concentration positively influenced nitrogen reabsorption efficiency.
Article
Plant Sciences
Guangman Song, Quan Wang, Jia Jin
Summary: Understanding the uncertainty in parameterization of Vcmax and Jmax is crucial for predicting carbon fluxes. Recent studies have shown that the relationship between Vcmax and Jmax varies depending on species and leaf traits. Our analysis in cool-temperate forest stands in Japan revealed that leaf traits, particularly LMA, significantly influence the regression, leading to improved model predictions.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2021)
Article
Agronomy
Hibiki M. Noda, Hiroyuki Muraoka, Kenlo Nishida Nasahara
Summary: Leaf optical properties play a key role in interpreting remote sensing data on vegetation canopy structure and functions. By studying the seasonal patterns of leaf optical properties in different tree species, we can better understand the growth and development of vegetation. The reflectance and transmittance spectra of leaves exhibit distinct seasonal changes.
AGRICULTURAL AND FOREST METEOROLOGY
(2021)
Article
Environmental Sciences
Noviana Budianti, Masaaki Naramoto, Atsuhiro Iio
Summary: This study investigated the relationship between stem sap flux density and crown leaf phenology at the individual tree level in a cool temperate forest in Japan. Ground observations of crown leaf cover showed the highest ability to predict the daytime total sap flux density (SFDday), indicating the predominant role of leaf amount seasonality in sap flow phenology. Among the UAV metrics, Hue had a superior ability to predict SFDday compared with other metrics due to its similar seasonality to ground observations.
Article
Agronomy
Guangman Song, Quan Wang, Jia Jin
Summary: This study examines the relationship between Vcmax and Jmax in Japanese cool temperate forests, revealing significant seasonal variability and instability. The chlorophyll content is positively correlated with the slope parameter, while the impact of climatic drivers is diverse.
AGRICULTURAL AND FOREST METEOROLOGY
(2021)
Article
Forestry
Zhangqi Ding, Guorui Xu, Yuxin Zhang, Shuang Zhang, Keming Ma
Summary: This study analyzed the spatial patterns of invertebrate communities in temperate mountain forest litter and soil using multi-scale ordination. The results revealed that invertebrate communities in both litter and soil layers exhibit patches along the altitudinal gradient, with different taxa associations and scales. Despite the higher abundance of invertebrates in the soil layer, the diversity of invertebrates in temperate-forest litter is higher and forms multi-scale assembly patches.
Article
Multidisciplinary Sciences
Ferenc Samu, Zoltan Elek, Bence Kovacs, David Fulop, Erika Botos, Denes Schmera, Reka Aszalos, Andras Bidlo, Csaba Nemeth, Vivien Sass, Flora Tinya, Peter Odor
Summary: The study aimed to uncover how different silvicultural treatments influenced ground-dwelling spider communities in a forest ecological experiment. It was found that spider abundance and species richness marginally increased in treatment plots, with species composition changes more pronounced due to treatment-related light intensity and humidity gradients. By the fifth year, spiders showed signs of relatively quick recovery to pre-treatment state, regardless of the severity of forestry treatments.
SCIENTIFIC REPORTS
(2021)
Article
Plant Sciences
Ryosuke Nakamura, Chikae Tatsumi, Hirofumi Kajino, Yutaro Fujimoto, Rei Fujii, Tomohiro Yokobe, Taiki Mori, Naoki Okada
Summary: This study aimed to investigate the decomposition rate of plant materials and the abundance of bacteria and fungi in serpentine and karst soils of cool-temperate forests. The results showed that the decomposition patterns in these soils were not simply predicted based on soil pH and other distinct characteristics, indicating that factors such as soil moisture content and heavy metal concentration may play a stronger role in decomposition and microbial community composition.
SOIL SCIENCE AND PLANT NUTRITION
(2023)
Article
Ecology
Ryosuke Nakamura, Tetsuhiro Watanabe, Yusuke Onoda
Summary: The concentration of silicon in plants varies during secondary succession, influenced by the turnover of species with different silicon uptake capacities. The leaf silicon concentration is positively correlated with the successional stage. However, contrary to the increased leaf litter silicon flux, the concentration of water-extractable soil silicon decreases. These results suggest that forest silicon dynamics during secondary succession are mainly influenced by changes in the abundance of silicon-accumulating woody plants and soil carbon dynamics.
Article
Environmental Sciences
Lili Perreault, Jodi A. Forrester, David J. Mladenoff, Stith T. Gower
Summary: The study evaluated the effects of adding downed woody debris on soil GHG fluxes in northern hardwood forests and found that the decay level of the debris and canopy condition influenced soil microbial activity and fluxes, potentially resulting in higher soil uptake under closed canopy conditions.
Article
Microbiology
Jason Bosch, Ema Nemethova, Vojtech Tlaskal, Vendula Brabcova, Petr Baldrian
Summary: In this study, amplicon sequencing was used to compare fungal and bacterial communities sampled with traditional composite samples or small 1 cm(3) cylinders from a discrete location. The results showed that bacterial richness and evenness were lower in small samples compared to composite samples. There was no significant difference in fungal alpha diversity between different sampling scales, suggesting that visually defined fungal domains are not restricted to a single species. Composite sampling may obscure variation in community composition and affect the understanding of detected microbial associations.
FEMS MICROBIOLOGY ECOLOGY
(2023)
Article
Limnology
Shunsuke Matsuoka, Yuki Kobayashi, Satoru Hobara, Takashi Osono
Article
Microbiology
Yoriko Sugiyama, Shunsuke Matsuoka, Takashi Osono
FEMS MICROBIOLOGY ECOLOGY
(2020)
Article
Ecology
Shunsuke Matsuoka, Hideyuki Doi, Shota Masumoto, Ryo Kitagawa, Keita Nishizawa, Kaho Tanaka, Motohiro Hasegawa, Satoru Hobara, Takashi Osono, Akira S. Mori, Masaki Uchida
Summary: In a sub-Arctic region in Quebec, Canada, the taxonomic, functional, and phylogenetic diversity of fungi associated with dead moss tissues and conifer needles were quantified. The study indicated the impact of host plant species and local environmental heterogeneity on fungal diversity, with moss showing significantly greater phylogenetic diversity compared to conifers. Local variations in vegetation and soil properties influenced taxonomic diversity, while functional diversity was relatively stable and not significantly affected by host, vegetation, or soil properties.
Article
Ecology
Shota Masumoto, Ryo Kitagawa, Keita Nishizawa, Takashi Osono, Motohiro Hasegawa, Yasuo Iimura, Shunsuke Matsuoka, Ryo Kaneko, Masaki Uchida, Akira S. Mori
Summary: This study utilized structural equation modeling to reveal that shrub coverage enhances soil respiration through root biomass, fungal community composition, and soil temperature, with complex interactions among soil factors affecting both autotrophic and heterotrophic respiration. The total effect sizes on soil respiration were similar between factors related to autotrophic and heterotrophic respiration, indicating that increases in soil respiration with shrub coverage are unlikely to result from decreases in soil organic matter.
Article
Microbiology
Takashi Osono
Article
Multidisciplinary Sciences
Takashi Osono, Syuntaro Hiradate, Satoru Hobara
Summary: The study conducted in a subtropical forest in Japan showed that bleached leaf litter exhibited different chemical characteristics over time, with faster mass loss and lower content of recalcitrant compounds. Bleaching plays a dominant role in the decomposition of leaf litter, accelerating the transformation and turnover of organic compounds and nitrogen.
SCIENTIFIC REPORTS
(2021)
Article
Microbiology
Takashi Osono, Shunsuke Matsuoka, Dai Hirose
FRONTIERS IN MICROBIOLOGY
(2020)
Article
Mycology
Takashi Osono, Dai Hirose, Shunsuke Matsuoka
Summary: A study revealed that different fungi have varied abilities in decomposing leaves and recalcitrant compounds, with Mycena species showing the highest mass loss. Some fungi exhibit selective decomposition of recalcitrant compounds, while others can simultaneously decompose both recalcitrant compounds and other components.
Article
Microbiology
Shota Masumoto, Ryo Kitagawa, Keita Nishizawa, Ryo Kaneko, Takashi Osono, Motohiro Hasegawa, Shunsuke Matsuoka, Masaki Uchida, Akira S. Mori
Summary: By utilizing partitioning methods for plant beta-diversity, this study found that plant species turnover, particularly with functional exchange, drove the spatial replacement of fungi, while spatial variety of graminoid or forbs species enhanced fungal beta-diversity. These results suggest the significance of small-scale factors for the assemblage of fungal communities.
FEMS MICROBIOLOGY ECOLOGY
(2021)
Article
Ecology
Yuki Hatano, Takumi Yoshida, Seri Matsuzuka, Takashi Osono, Satoru Hobara, Dai Hirose, Yukiko Tanabe, Sakae Kudoh, Masaki Uchida
Summary: This study investigated the diversity of fungi inhabiting ice-free outcrops of continental Antarctica, with Phoma herbarum being the most frequent taxon closely related to the nitrogen level of the substrata. Experimental results showed that these fungi were mesophilic and capable of utilizing a variety of substrates.
Article
Ecology
Takashi Osono, Shunsuke Matsuoka, Dai Hirose
Summary: Fungi selectively removing lignin from leaf litter accelerate decomposition and bleaching, with different fungal families showing varying degrees of host recurrence for plant species, indicating their different roles in litter decomposition.
Article
Ecology
Shunsuke Matsuoka, Yuki Hatano, Takashi Osono
Summary: Fungi play unique roles in ecosystem functions and their taxonomic and functional diversities are important for predicting ecosystem functions. With the use of high-throughput sequencing, fungal DNA sequences can be detected and compared with databases to identify the taxa. However, functional data on individual taxa are limited. This study compiled ecological information of fungal families and provided a data basis for estimating fungal functional group composition and diversity.
ECOLOGICAL RESEARCH
(2022)
Article
Microbiology
Kohei Tabuchi, Dai Hirose, Motohiro Hasegawa, Takashi Osono
Summary: This study assessed the metabolic diversity and redundancy of xylariaceous fungi associated with leaf litter decomposition, and identified the relative influences of geographic and climatic factors on fungal metabolism.
Article
Ecology
Yudai Nagata, Takashi Osono, Motohiro Hasegawa, Satoru Hobara, Dai Hirose, Yukiko Tanabe, Sakae Kudoh, Masaki Uchida
Summary: Little is known about the metabolic capabilities of microbial assemblages in continental Antarctic moss. In this study, microbial metabolism was analyzed using Biolog EcoPlateTM, revealing significant variations in the utilization of different carbon sources. The chemical, biological, and physical properties of the moss tissues were found to play a role in the microbial utilization of carbon sources.
Article
Ecology
Yoriko Sugiyama, Shunsuke Matsuoka, Takashi Osono
Summary: In Japan, the study found that the spatial patterns of ECM fungal communities and their driving factors varied between two Fagaceae host species, Fagus crenata and Castanopsis sieboldii. The difference in associated host plants led to different environmental responses among ECM fungal communities.
JOURNAL OF BIOGEOGRAPHY
(2021)