Faculty Profiles - MIKI Naoko

Papers - MIKI Naoko

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Acclimation of water transport property to different irradiance in evergreen Quercus glauca and Eurya japonica seedlings. Reviewed

Ogasa, M, Miki, N. H, Yoshikawa, K

Ap. For. Sci. 23 ( 2 ) 1 - 9 2014

A Common Stomatal Parameter Set Used to Simulate the Energy and Water Balance over Boreal and Temperate Forests Reviewed

Takeshi Yamazaki, Kyoko Kato, Tamaki Ito, Taro Nakai, Kazuho Matsumoto, Naoko Miki, Hotaek Park, Takeshi Ohta

JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN 91 ( 3 ) 273 - 285 2013.6

Language：English Publishing type：Research paper (scientific journal) Publisher：METEOROLOGICAL SOC JAPAN

A parameter set expressing the potential response used to simulate evapotranspiration was inferred from pooled data of leaf-level stomatal conductance in the Far East. We used Jarvis-type parameterization, which consists of restriction terms of light, air dryness, temperature, and soil water. Two parameter sets, pooled common (PC) and within-site (WS) sets, were determined using stomatal conductance data of eight species at nine sites. Seasonal changes of energy and water fluxes observed at four tower sites are well reproduced by a land surface model, despite using a different set of parameters. The results suggest that energy and water fluxes can be simulated using only one common parameter set with no parameter tuning, at least for forests in a wide region of the Far East.
We discuss why similar fluxes were simulated using PC and WS parameters despite the clear differences between these two parameter sets. Sensitivity experiments showed that the effects of maximum stomatal conductance and soil water content mutually cancel each other in Yakutsk and that an optimum temperature effect was added.

DOI： 10.2151/jmsj.2013-303

Colonization and community structure of root-associated microorganisms of Sabina vulgaris with soil depth in a semiarid desert ecosystem with shallow groundwater Reviewed

Takeshi Taniguchi, Hiroyuki Usuki, Junichi Kikuchi, Muneto Hirobe, Naoko Miki, Kenji Fukuda, Guosheng Zhang, Linhe Wang, Ken Yoshikawa, Norikazu Yamanaka

MYCORRHIZA 22 ( 6 ) 419 - 428 2012.8

Language：English Publishing type：Research paper (scientific journal) Publisher：SPRINGER

Arbuscular mycorrhizal fungi (AMF) have been observed in deep soil layers in arid lands. However, change in AMF community structure with soil depth and vertical distributions of the other root-associated microorganisms are unclear. Here, we examined colonization by AMF and dark septate fungi (DSF), as well as the community structure of AMF and endophytic fungi (EF) and endophytic bacteria (EB) in association with soil depth in a semiarid desert with shallow groundwater. Roots of Sabina vulgaris and soils were collected from surface to groundwater level at 20-cm intervals. Soil chemistry (water content, total N, and available P) and colonization of AMF and DSF were measured. Community structures of AMF, EF, and EB were examined by terminal restriction fragment length polymorphism analysis. AMF colonization decreased with soil depth, although it was mostly higher than 50%. Number of AMF phylotypes decreased with soil depth, but more than five phylotypes were observed at depths up to 100 cm. Number of AMF phylotypes had a significant and positive relationship with soil moisture level within 0-15% of soil water content. DSF colonization was high but limited to soil surface. Number of phylotypes of EF and EB were diverse even in deep soil layers, and the community composition was associated with the colonization and community composition of AMF. This study indicates that AMF species richness in roots decreases but is maintained in deep soil layers in semiarid regions, and change in AMF colonization and community structure associates with community structure of the other root-associated microorganisms.

DOI： 10.1007/s00572-011-0417-8

Simulating seasonal and inter-annual variations in energy and carbon exchanges and forest dynamics using a process-based atmosphere-vegetation dynamics model Reviewed

Motomu Toda, Kumiko Takata, Naoyuki Nishimura, Masahito Yamada, Naoko Miki, Taro Nakai, Yuji Kodama, Shigeru Uemura, Tsutomu Watanabe, Akihiro Sumida, Toshihiko Hara

ECOLOGICAL RESEARCH 26 ( 1 ) 105 - 121 2011.1

Language：English Publishing type：Research paper (scientific journal) Publisher：SPRINGER JAPAN KK

The present paper shows simulated results of seasonal and inter-annual variations in energy and carbon exchanges and forest dynamics in a sub-boreal deciduous forest using a fully coupled atmosphere-vegetation interaction model [multilayered integrated numerical model of surface physics-growing plants interaction (MINoSGI)]. With careful adjustment of site-specific eco-physiological parameters, MINoSGI reproduced successfully stand biomass-tree density relationship based on the forest inventory data for 7 years (1999-2005) and seasonal and inter-annual variations in energy and CO2 fluxes measured by means of eddy covariance technique for 3 years (2003-2005) in the sub-boreal forest, northern Japan. In addition, MINoSGI estimated annual evapotranspiration (E (vt)) at 328.6 +/- A 25.8 mm year(-1), net primary production (NPP) at 372.1 +/- A 31.5 gC m(-2) year(-1) and net ecosystem exchange (NEE) at -224.2 +/- A 32.2 gC m(-2) year(-1). We found the estimate of annual NEE in our site lies among the estimates at other forest stands with the almost same climatic conditions in northern Japan, although the tree species and stand age of these forests are different from those of our site. Overall, MINoSGI was found useful to present simultaneous simulations of forest dynamics, surface energy, and carbon exchanges of a forest stand in the future from micro-meteorological and ecophysiological points of view.

DOI： 10.1007/s11284-010-0763-6

Difference in distribution of Agriphylum squarrosum (L.) Moq. by relative elevation from groundwater level in Mu Us Desert Reviewed

OYABU Takashi, ZHANG Guo Sheng, WATANABE Eiichi, YOSHIMIZU Shohei, TODA Kentaro, MIZUNO Yume, MIKI Naoko, WANG Lin He, YOSHIKAWA Ken

Journal of the Japanese Society of Revegetation Technology 35 ( 1 ) 39 - 44 2009.8

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPANESE SOCIETY OF REVEGETATION TECHNOLOGY

We investigated the distribution of A. squarrosum in the semi-fixed and shifting sand dunes at Mu Us Desert in Inner Mongolia. The relative elevations from the groundwater level to the A. squarrosum community, as well as the form and biomass of A. squarrosum were investigated. Research shows that A. squarrosum plants grew at elevations between 108 cm and 532 cm above the groundwater level. In plots over 500 cm above groundwater level, A. squarrosum is the most dominant species. In addition, the community of A. squarrosum was found in the environment in which other species didn't grow easily, such as areas where water supply to plants is limited. The long main root of A. squarrosum enables the plant to access dewfall water or moisture from under dry sand. The form T/R ratio of A. squarrosum was under 1.00 because of the main root length, and the biomass T/R ratio was over 1.00. The biomass of A. squarrosum was determined using the approximation method.

DOI： 10.7211/jjsrt.35.39

Seasonal changes of photosynthetic characteristics and pigment composition of Sabina vulgaris ant. under water stress

Yu-Ling Li, Fan Zhu, Jun-Gang Wang, Naoko Miki, Keiji Sakamoto, Ken Yoshikawa

Shengtai Xuebao/ Acta Ecologica Sinica 29 ( 8 ) 4346 - 4352 2009

Language：Chinese Publishing type：Research paper (scientific journal)

To explore the eco-physiological adaptation of Sabina vulgaris to drought stress, a drought-controlled experiment was performed using PEG (Polyethylene glycol) with three levels of osmotic potential (0. 02, -0.1 and - 0. 34 MPa, respectively) in the culture solution in the greenhouse for 6 years (1997-2003). The seasonal changes of photosynthetic characteristics and pigment composition were investigated for the whole year in 2003. The pattern of seasonal change in stomatal conductance was shown in bimodal distribution with peaks in both May and September in 2003, and the stomatal conductance in the control was much higher than that of the other two water stress treatments, while the photosynthetic rate of low water stress was the highest among the three treatments. The ratio of chlorophyll a to chlorophyll b (Chi a/b) increased for all three treatments through November to March next year, particularly at the high water stress condition. The total leaf Chl content (Chl a + b) increased for all the three treatments through March to September, and the value was the lowest with the high water stress treatment. The total xanthophyll content (V + A + Z) and (A + Z)/(V + A + Z) were significantly higher in winter (November to March) than in summer (May to July) compared to that in other seasons, which was particularly obvious with high drought treatment.

Leaf photosynthetic characteristics of Pleioblastus pubescens Nakai growing under different light conditions. Reviewed

Ala, T, Sakamoto, K, Miki, N, Hirobe, M, Yoshikawa, K

J. Jpn. Soc. Reveget. Tech. 34 ( 4 ) 636 - 640 2009

Seasonal changes of ecological characteristics on culms and leaves of Pleioblastus pubescens Nakai growing under different light conditions. Reviewed

Ala, T, Sakamoto, K, Miki, N, Hirobe, M, Yoshikawa, K

J. Jpn. Soc. Reveget. Tech. 34 ( 3 ) 524 - 533 2009

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Revegetation Technology

Pleioblastus pubescens Nakai occurs in different light conditions of secondary forests in the warmtemperate zone of Japan. Under different light conditions, we experimentally grew P. pubescence by planting the rhizomes, surveyed emergence, growth and survivorship of culms and leaves, and observed the morphology of leaves. Emerging duration of culms including tillering culms was longer, and the cumulative number of those culms was larger in the high light intensity than in the low light intensity. In the high light intensity, survival number of culms tended to be higher. The culm mortality in the relative light intensity of 1% was the highest In high light intensity, culm elongation rates were slower and the length after the complation elongation tended to be shorter than in the low light intensity. Therefore, it is suggested that P. pubescens has different regimes for invading and dominating the habitats in different light conditions. It is likely that P. pubescence increases the density with short culms in the high light intensity, on the other hand, it increases the length of culms with the low density in the low light intensit In foliage, longevity of leaves in high light intensity is shorter than that in the low light intensity. It was suggested that the foliage in the high light intensity is maintained by longer duration of culm and leaf emergence, and that in low light intensity is maintained by longer leaf longevity. In addition, leaves were smaller and thicker in light conditions.

DOI： 10.7211/jjsrt.34.524

Other Link： https://jlc.jst.go.jp/DN/JALC/00337240629?from=CiNii

Physiologocal responses of leaves in Pleioblastus pubescens Nakai to light stress under different light conditions. Reviewed

Ala T, Ishii Y, Sakamoto K, Miki N, Hirobe M, Yoshikawa K

J. Jpn. Soc. Reveget. Tech. 35 ( 1 ) 51 - 56 2009

Stand structure and regeneration of Populus euphratica forest in the lower reaches of the Heihe River, NW China Reviewed

Yukako Monda, Naoko Miki, Ken Yoshikawa

Landscape and Ecological Engineering 4 ( 2 ) 115 - 124 2008.11

The relation of groundwater level and distribution of Cynanchum komarovii Al. Iljinski indicate species of overgrazing in Mu Us sandy land in Inner Mongolia Reviewed

OYABU Takashi, TODA Kentaro, MIZUNO Yume, YOSHIMIZU Shohei, HORIKAWA Masahiro, ZHANG Guo Sheng, MIKI Naoko, WANG Lin He, YOSHIKAWA Ken

Journal of the Japanese Society of Revegetation Technology 34 ( 1 ) 33 - 38 2008.8

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Revegetation Technology

We investigated the relationship between groundwater level and distribution of Cynanchum komarovii in Musu sandy land. As a result, relative elevation at which C. komarovii was distributed ranged from 68 cm to 314 cm at this study area. The dry weight of C. komarovii was highest at the lower part of sand dune, where the relative elevation from groundwater level was 140 cm. The number of species was lower at the bottom of the sand dune than at other level. According to the groundwater level and the distribution depth of stem and root, it was thought that C. komarovii adjusted by extending the stem to sedimental sand, and grew while using underground water. We consider it could be suitable for use as a ground cover at sites affected by overgrazing in semi-arid land.

DOI： 10.7211/jjsrt.34.33

RESPONSE OF WATER-USE PROPERTIES AND GROWTH OF SABINA VULGARIS ANT. IN DIFFERENT WATER CONDITIONS Reviewed

YANG Lingli, MIKI Naoko, HARADA Naoki, HIROBE Muneto, SAKAMOTO Keiji, YOSHIKAWA Ken

Journal of Environmental Science for Sustainable Society 2 ( 2 ) 27 - 34 2008

Language：English Publishing type：Research paper (scientific journal) Publisher：Graduate School of Environmental and Life Science, Okayama University

  We compared effects of different growing water potential conditions on physiological and morphological water–use properties of Sabina vulgaris Ant., which is an evergreen shrub that is widely distributed in arid and semi-arid environments of the Mu Us Sandy Land, China. Measurements were taken of cuttings grown for eight years under -0.02 MPa (control), -0.10 MPa (moderate water stress), and -0.34 MPa (severe water stress) water potential conditions. The transpiration rate (T_r) under moderate stress was significantly lower than that under severe stress and control water conditions (49% and 45% lower, respectively, than severe stress and the control on average). The leaf-specific hydraulic conductivity (LSC) in shrubs growing under moderate water stress was also significantly lower than for those under the severe water potential condition. In contrast, S. vulgaris growing under severe water stress had less leaf biomass than under moderate stress or control conditions. These results suggest that S. vulgaris growing under moderate water stress tends to show a reduced transpiration rate derived from its low LSC; therefore it avoids water loss in response to chronic water stress, while plants growing under severe water stress tends to reduce water loss through decreased leaf biomass. These results suggest that S. vulgaris has a high capacity for acclimation to different water potential conditions through physiological and morphological flexibility.

DOI： 10.3107/jesss.2.27

Spatial pattern of bamboo culms in an abandoned Phyllostachys nigra var. henonis stand(<Special Issue>THE 38TH SCIENTIFIC RESEARCH MEETING) Reviewed

Saroinsong Fabiola Baby, Sakamoto Keiji, Hirobe Muneto, Miki Naoko, Yoshikawa Ken

Journal of the Japanese Society of Revegetation Technology 33 ( 1 ) 65 - 70 2007

Language：English Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Revegetation Technology

Our interests are in detecting the spatial pattern of Phyllostachys nigra var. henonis culms within growth stages -sprouts, current-year culms, and 5-year-old culms- and discussing the changes among them. The analysis used Ripley's univariate L(t) function. Change in the spatial pattern among growth stages was not observed in the intermediate and edge parts of bamboo forest where culms were less aggregated from early stage. In the interior, sprouts and current-year culms had clumped distribution at almost all distances in years with high annual culm production, Spatial pattern changes were observed from a clumped distribution of current-year culms into a less aggregated distribution of 5-year-old culms. We infer that the density is a determinant in forming the spatial pattern of culm stage of P. nigra v. henonis through competition in the stand with high density culms.

DOI： 10.7211/jjsrt.33.65

Other Link： https://jlc.jst.go.jp/DN/JALC/00299736628?from=CiNii

Growth of trees in a windbreak established in desertification area 15 years ago in China : Yinchuan, Ninxia-Huizu Autonomous Region(PAPERS AND REPORTS OF THE 37 TH SCIENTIFIC RESEARCH MEETING) Reviewed

YOSHIKAWA Ken, SAKAMOTO Keiji, HORI Sachiyo, MIKI Naoko, HUANG Sheng-ze

Journal of the Japanese Society of Revegetation Technology 32 ( 1 ) 137 - 142 2006

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Revegetation Technology

Forest structure and growth of individual trees were investigated by enumeration survey and stem analysis in the windbreaks established and left free for 15 years in Mu-Us desert in Yinchuan City, Ninxia-Huizu Autonomous Region, China. 40% of planted Populus alba var. pyramidalis reduced because of self-thinning promoted by severe intra-specific competition for natural resources. Survived trees showed the vigorous growth reaching higher than 12 meters. On the other hand, self-thinning was seldom occurred in both windbreaks of P. Opera and P. hopeiensis. They had a lot of dead branches on their crowns and their annual height growth showed an asymptotic curve to the 7 to 10 meters maximum height. Soil moisture content was lower in P. alba var. pyramidalis forest than in P. Opera and P. hopeiensis forests, because of more water consumption of P. alba var. pyramidalis by great volume of leaf biomass.

DOI： 10.7211/jjsrt.32.137

Other Link： https://jlc.jst.go.jp/DN/JALC/00284128377?from=CiNii

Stand dynamics of a Bamboo Forest Adjacent to a Secondary Deciduous Broad-leaved Forest Reviewed

Fabiola Baby Saroinsong, Keiji Sakamoto, Naoko Miki, Ken Yoshikawa

Journal of the Japanese Society of Revegetation Technology 32 ( 1 ) 15 - 20 2006

Language：English Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Revegetation Technology

A 12-years monitoring was conducted of a bamboo forest adjacent to a deciduous broad-leaved forest to clarify the bamboo stand dynamics during its expansion into an adjacent forest. The bamboo forest gradually expanded its area into the deciduous broad-leaved forest at an invasion rate of 7m over 12 years. The density and aboveground biomass of bamboo living culms in the study plot increased. Conversely, the understory trees' density and species number decreased. The mean diameter at breast height (dbh) of living culms did not differ between the interior zone and the periphery zone of the bamboo stand through observation. Although increment number and aboveground biomass were constant in three innermost sub-plots, they were markedly increased in outer part, which increased understory trees' mortality.

DOI： 10.7211/jjsrt.32.15

Other Link： https://jlc.jst.go.jp/DN/JALC/00284128155?from=CiNii

Genetic variation analysis using the RAPD method for mangrove forests in Oman. Reviewed

Yamaguchi, Y, Miki, N, Yoshikawa, K

J. Jpn. Soc. Reveget. Tech. 31 ( 1 ) 92 - 96 2005

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Revegetation Technology

To analyze genetic variation among Avicennia marina populations growing along the coastal area of the Sultanate of Oman, seven Avicennia marina populations were selected and DNA polymorphism was measured by the RAPD method. Genetic distances between the northern and central populations and the southern population were longer than the distances between the northern populations and the central populations. It suggested the necessity of consideration for the mutual transplantation of seeds and seedlings for the afforestation program. Genetic diversity showed significant positive correlation with forest area. Therefore it was important to maintain Avicennia marina population occuping a large forest area for the conservation of genetic diversity.

DOI： 10.7211/jjsrt.31.92

Other Link： https://jlc.jst.go.jp/DN/JALC/00256140826?from=CiNii

Restoration of pine forests with pine wilt disease by removal of understory and A0 horizon on the forest floor. Reviewed

Sakamoto, K, Ishii, A, Nishimoto, T, Miki, N, Yoshikawa, K

J. Jpn. Soc. Reveget. Tech. 30 ( 1 ) 110 - 115 2004

The characteristic of growth and photosynthesis of Pleioblastus pubescens Nakai growing in the different light conditions. Reviewed

Baba, F, Mitsui, D, Sakamoto, K, Miki, N, Yoshikawa, K

J. Jpn. Soc. Reveget. Tech. 30 ( 1 ) 175 - 180 2004

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Revegetation Technology

Rhizomes of pieioblastus pubescence were planted under the different light conditions of 100%, 10%, 5%, and 1% as relative light intensity After culm sprouting, length, diameters, leaf number, standing crop, diurnal photosynthetic rates and photosynthetic rates under different light intensity were measured by treatments. The number of emerging culms was larger and the sizes were smaller in high light intensity conditions than in low light conditions. Thickness of leaves and specific leaf area wem the largest, in 100% light conditions. Photosynthetic rates a day were highest in 100% light condition and lowest, in 1% light condition. Standing crop in 100% condition was larger than initial standing crop of planted rhizome, those in 10% and 5% conditions were similar with initial one, and that in 1% condition was smaller.

DOI： 10.7211/jjsrt.30.175

Other Link： https://jlc.jst.go.jp/DN/JALC/00242821470?from=CiNii

The effects of water stress on transpiration and water uptake of Sabina vulgaris Ant. And Juniperus chinensis var. kaizuka Hort. Reviewed

Li, Y, Hayashi, M, Miki, N, Sakamoto, K, Yoshikawa, K

J. Jpn. Soc. Reveget. Tech. 30 ( 1 ) 98 - 103 2004

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Revegetation Technology

Saplings of Sabina vulgaris Ant, and Juniprus chinensis var. Kaizuka Hort, were grown under two levels of soil moisuture conditions, pF1.8 and pF4.2. Transpiration rate, stomatal conductance and water potential were measured under natural condition. Cuticular and stomatal transpiration rates were measured by a cut branch method. Drught stress decreased the stomatal conductance of S. vulgaris and hastened stomata closure at high water content of needle. High ability of water absorption of S. vulgaris was secured by the high gradient of water potential between needle and basal part of stem. On the other hand, high rate of transpiration was realized under high water supply. J. chinensis var. kaizuka showed a significant reduction of both stomatal and cuticular transpiration rates by the effet of drought stress. Stomatal closure was occurred at relatively high water content of needle. Although there is no difference of the gradient of water potential in top part of J. chinensis var. kaizuka between the treatments pF1.8 and pF4.2, the gradient of water potential under ground part beame significantly low in the treatment pF4.2.

DOI： 10.7211/jjsrt.30.98

Other Link： https://jlc.jst.go.jp/DN/JALC/00242821340?from=CiNii

Effects of different site conditions on water use in Pinus densiflora Sieb. et Zucc. Reviewed

Miki, N, Umeda, A, Sakamoto, K, Nishimoto, T, Yoshikawa, K

J. Jpn. Soc. Reveget. Tech. 30 ( 1 ) 104 - 109 2004

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Revegetation Technology

To elucidate the differences in whole-tree water use of Pinus densiflora Sieb. et Zucc, growing in different site conditions, we measured the stomatal conductance, the transpiration rate, and the leaf water potential in leaf. The sap now velocity and the change of diameter also were measured in branch and stem. It was suggested that pine tree of the upper part of the slope, growing under dry condition controlled the stomatal openness and reduce the water loss in response to soil drying, according to the increase of hydraulic resistance in branch. The water storage of branch and stem partially compensated the temporal water storage. While pine tree of the lower part of the slope, growing on relatively moist condition maintained the high stomatal conductance and transpired irrespective of soil drying.

DOI： 10.7211/jjsrt.30.104

Other Link： https://jlc.jst.go.jp/DN/JALC/00242821357?from=CiNii

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