Journal of the Japanese Society of Revegetation Technology
Online ISSN : 1884-3670
Print ISSN : 0916-7439
ISSN-L : 0916-7439
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Volume 41, Issue 1
No. 1
Displaying 1-50 of 55 articles from this issue
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ORIGINAL ARTICLES
  • The adsorption pattern of radioactive cesium in the soil of litter removed secondary forests and agricultural fields
    Sho SAITO, Tatsuaki KOBAYASHI, Terumasa TAKAHASHI, Rie YAMAMOTO, Takam ...
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 3-8
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.3
    JOURNAL FREE ACCESS
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    The adsorption pattern of radioactive cesium (137Cs) in soil of forests and agricultural fields derived from Fukushima Daiichi NPP accident was investigated using sequential extraction experiment. There was little soluble 137Cs. Exchangeable and organic matter bound 137Cs were 13% in organic horizon and 9% in surface of mineral soil in agricultural fields, whereas 3% and 2% respectively in forests. Most of 137Cs hardly move in ecosystem regardless of the organic matter content. Radioactivity of 137Cs in the surface of mineral soil was decreased by organic matter removal, but the ratio of exchangeable and organic matter bound 137Cs increased.
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  • Effects of MgO improved soil mixed with rice crop residues on plant growth
    Yuma SHIMAMOTO, Tetsuya SUZUKI, Toshihiro MORII
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 9-14
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.9
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    Disposing of rice hulls and rice straws has been required in Niigata. And, a countermeasure of blowing sand by strong wind is needed at coastal area in Niigata. The purpose of this study is to prevent blowing sand by developing MgO improved soil mixed with rice hull ash and rice straw fibers. Cultivation test using Festuca arunidinacea Schr. and Lolium perenne L. was conducted. Color of leave and rooting zoon were evaluated by image analysis. The results suggest plant grow little by adding MgO over 3 %, plant grow well by mixing rice hull ash
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  • Investigation of soil reinforcement by root system of two shrub species
    Keitaro YAMASE, Chikage TODO, Yasuhiro HIRANO
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 15-20
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.15
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    Trees can be uprooted by typhoons which have intensive rainfall and strong winds. The ability of the tree to resist uprooting could depend on tree root systems in the soil. In this study, to clarify the difference in pull-out resistance between tree species (Cryptomeria japonica (L. fil.) D. Don) and unpalatable shrub species (Pieris japonica (Thunb.) D. Don and Edgeworthia chrysantha Lindley) , we carried out pull-out tests of root segments. As a result, the pull-out resistances of the roots in 10 mm basal diameter in C. japonica (1012.3 N) and P. japonica (844.3 N) were stronger than that in E. chrysantha (200.1 N). On the other hand, the soil reinforcement (i.e. sum of the pull-out resistance per soil profile 1 m2) was largest in C. japonica (26.8 kN) , and followed by P. japonica (15.1 kN) ,and was smallest in E. chrysantha (1.0 kN). Our results suggest that taking advantage of the characteristics of each unpalatable shrub species improve the soil reinforcement in a site heavily used by sika deer (Cervus nippon Temminck) .
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  • Assessment of ornamental plants using multiple salt tolerance indicators and classification of their physiological salt tolerance mechanisms
    Kojiro SAITO, Takanori KURONUMA, Takeshi KANAYA, Hitoshi WATANABE
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 21-26
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.21
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    We carried out salt treatment in ornamental plants. Subsequently, we assessed their salt tolerance and aesthetic value, and investigated their salt tolerance mechanisms. We found that Senecio cineraria had tolerance similar to that of halophytes, and its aesthetic value was not impaired. Additionally, we determined that Senecio cineraria was Na+ excluder, and Helichrysum italicum was Na+ includer. We were able to compare ornamental plants with halophytes, and assess their salt tolerance and aesthetic value at the same time. We suggest that, based on the characteristics of salt tolerance mechanisms, it is possible to select “better” plants for planting in salt-damaged land.
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  • Arbuscular mycorrhizal colonization and glomalin related soil protein accumulation of five coastal plants in Tottori sand dunes
    Toshiki YUZAWA, Norikazu YAMANAKA, Takeshi TANIGUCHI
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 27-32
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.27
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    Colonization of arbuscular mycorrhizal fungi, glomalin related soil protein, total carbon, and total nitrogen in soil of five coastal plants were examined in Tottori sand dunes. As the result, colonization by arbuscular mycorrhizal fungi of Elaeagnus umbellate and Artemisia capillaries was relatively high, whereas the colonization of Carex koboumugi was low, showing that mycorrhizal colonization was different among the plants species growing even in the same area. The glomalin related soil protein of C. koboumugi was lower and it was thought to be due to the low mycorrhizal colonization. Glomalin related soil protein in soil had significant and positive correlation with total N in soil, indicating that the soil protein produced by arbuscular mycorrhizal fungi have relationship with the soil nitrogen in coastal area.
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  • The effect of salinity stress on growth and physiology of 1-yr old seedlings of licorice (Glycyrrhiza uralensis Fischer ex Candolle)
    Satomi OKAMURA, Fukuju YAMAMOTO, Eiji NISHIHARA, Takeshi TANIGUCHI, No ...
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 33-38
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.33
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    Licorice is the leguminous perennial plant growing in arid areas of China, and its root has been used for Chinese medicines. Recently, wild licorice resource is exhausting for over harvesting, and this results in desertification. To consider the restoration of salt affected soils using licorice, effects of salt stress (NaCl : 0 mM, 50 mM, 100 mM, 200 mM, 400 mM, 600 mM ) on licorice seedlings were examined. The survival and physiological properties were damaged in 400 mM, and all plants were died 600 mM. Glycyrrhizin content decreased in 400 mM. Na+ content and Ratio of Na+ to K+ in leaf and stem significantly increased with increase of NaCl concentration
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  • Effects of sand burial or erosion on the growth and physiology of Populus simonii trees in Kubuqi desert, China
    Fukuju YAMAMOTO, Kana FUJIWARA, Takeshi TANIGUCHI, HuiPing MAO, Norika ...
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 39-44
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.39
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    Effects of sand burial or erosion caused by wind on the growth and physiology of Populus simonii trees, planted in 2008, were investigated in Kubuqi desert, Inner Mongolia, China. Sand burial greatly influenced development of stem clusters by means of layering of buried branches and tree growth. Root erosion may simulate development of many ramets derived from root suckers on horizontal roots. Buried trees with sand showed higher δ13C and accumulation of compatible solutes such as soluble sugar and alanine betaine in leaves. These results suggest that drought stress in buried individuals was greater than that in root eroded individuals.
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  • Survival, growth and physiological features of 3 Salicaceae plants planted in Kubuqi desert in Inner Mongolia, China
    Yuka IZUMI, Takeshi TANIGUCHI, HuiPing MAO, Fukuju YAMAMOTO, Norikazu ...
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 45-50
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.45
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    The survival rate, physiology and growth of Populus simonii, Populus alba var. pyramidalis and Salix babylonica trees planted in April, 2013, on a dune slope in Kubuqi desert, Inner Mongolia, China, were studied in August, 2013 and 2014. Their survival rate was high because of much precipitation in 2012 and 2013. The drought tolerance of all species seems to be improved because of raised δ13C and osmolytes accumulation in leaves in 2014. However, P. alba is considered to be unsuitable for planting on dunes in Kubuqi desert because P. alba showed stem die-back and low stomatal conductance in dry year
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  • The effect of seed size on seedling growth and drought tolerance of the restoration shrub Caragana korshinskii Kom. in China
    Min SAI, Tatsushi MASUDA, Eijiro HARA, Norikazu YAMANAKA, Toshihiko KI ...
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 51-55
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.51
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    We investigated the effects of seed size on drought tolerance of the seedlings of Caragana korshinskii Kom., a shrub commonly used for dune revegetation in China. Although seedlings from small seeds (20-37 mg) weighed at the most approximately 60% of those from large seeds (73-90 mg) , their growth was not inhibited by drought stress. Because seedlings from small seeds had smaller but less-branched and well-elongated roots, maximum rooting depth differed little amongst seed sizes. We concluded that the drought tolerance of C. korshinskii seedlings differed little among seed sizes because of their high root elongation ability.
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  • Effects of Juniperus sabina L. and soil surface environmental conditions on stand structure of Artemisia ordosica Krasch. on fixed sand dune in semiarid area, China
    Tetsuya MATSUMOTO, Naoko MIKI, H., Muneto HIROBE, GuoSheng ZHANG, LinH ...
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 56-61
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.56
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    We investigated the effect of soil surface environmental conditions on the stand structure of Artemisia ordosica Krasch., which is a deciduous semi shrub and one of the revegetation plant in semiarid area, China. The effect of Juniperus sabina L., which has prostrate life-form and often distributed with A. ordosica was also considered. Individual density, position, size, existence of fruits, and soil surface conditions were measured. The results suggested that both species exclude with each other and the A. ordosica community on the fixed sand dune was influenced by the competition to get the resources with J. sabina rather than the nutrient conditions of soil surface.
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  • Growth, morphology and flooding adaptability of Taxodium distichum plants planted under swamp condition
    Ayana HANZAWA, Souichirou OKIDA, Misa SAKAGUCHI, Makiko TATEISHI, Fuku ...
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 62-66
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.62
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    Effects of depth of flooding on growth and tree morphology were investigated in about 40 years old Taxodium distichum trees planted at the border of Kamataike reservoir, Kyushu University Forest, Fukuoka. Height growth was suppressed as the increase in water depth. The lower portion of trunks at shallower regions indicated buttress-shaped stem form, whereas that of deeper regions was bottle-shaped form. Spongy bark tissue composed of enlarged cell diameter and expanded intercellular spaces was observed in stems at the water level and apical portions of knee roots. Lysigenous intercellular spaces were observed near the apices of floating roots.
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  • Effects of submergence period in saline water and cured under soil flooding and unflooding condition with fresh water on growth and mortality of Pinus thumbergii and Taxodium distichum seedlings
    Souichirou OKIDA, Ayana HANZAWA, Misa SAKAGUCHI, Haruna INOUE, Fukuju ...
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 67-72
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.67
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    In this study, saplings of Taxodium distichum and Pinus thumbergii were grown under flooded/unflooded condition following total submergence in saline water for various periods to compare their growth and mortality. The morality of T. distichum was 30 % in saplings of 12hr submergence with unflooded recovery treatment. The survived T. distichum saplings were also inhibited the growth increment. The mortality of P. thumbergii remained 14% in saplings submerged for 24hr when de-submerged saplings were grown under unflooded condition. However, the mortality of P. thumbergii saplings under flooding environment is very high regardless of submergence period.
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  • Effects of sea-water flooding of soil on growth of potted 17 woody plants distributed along the coastal area of the Pacific Ocean in eastern Japan
    Haruna INOUE, Narumi KHOGUCHI, Makiko TATEISHI, Takeshi TANIGUCHI, Fuk ...
    2015 Volume 41 Issue 1 Pages 73-78
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.73
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    Evaluation of salt tolerance for tree species are essential to reduce the salt damages rendered by Tsunami on coastal forests. In this study, soil of potted 17 tree species, which are found along the coastal areas in the Pacific side of eastern Japan, were flooded by sea water for 24hr, and changes in plant survival, leaf color, and Fv/Fm ratio were investigated. The responses to sea water flooding were different greatly among tree species despite the EC of sea water was comparatively low (19.0 mS cm-1). Juglans mandshurica var. sachalinensis, Castanea crenata, Robinia pseudoacacia, Celtis sinensis var. japonica, Prunus yamasakura, and Cameria japonica changed leaf color rapidly and died just after sea water flooding. However, no dead plants were observed for Pittosporum tobira , and 3 conifers (Cryptomeria japonica, Pinus densiflora and Pinus thunbergii). These 5 species showed little change in leaf color. Other 7species showed intermediate responses.
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  • Wetland vegetation and environmental factors in coastal forests uprooted by the tsunami
    Kohei OKA, Yoshihiko HIRABUKI
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 79-84
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.79
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    We examined the relationship between wetland vegetation and environmental factors in the area of coastal forests that were uprooted by the Tohoku tsunami of 2011. We surveyed the microtopography, vegetation, and water quality in transects across a depression. The plant community changed from wet-type to dry-type with an increase in relative altitude. We observed 18 wetland plant species, including 3 endangered species. Halophyte species were found to dominate in the areas of high salinity. Collectively, our results suggest that it is important to maintain diverse conditions of microtopography and salinity to conserve the diversity of wetland plants in this region.
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  • Characteristics of the habitat for Dianthus superbus L. var. longicalycinus (Maxim.) Williams on Senbonhama Seashore in Numazu
    Eriko ARAI, Satoshi OSAWA, Erika NANAUMI
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 85-90
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.85
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    We investigated the habitat characteristics of Dianthus superbus at Senbonhama seashore, Suruga Bay, Japan. The highest density of D. superbus was observed in the grassland of the high zone, whereas it was not found in the semi-stable zone of the seashore. The results of the belt-transect survey did not establish a correlation between population density of D. superbus and environmental conditions in each quadrat. The DCA and cluster analysis using the cover degree of plants appearance in each quadrat grouped D. superbus with Miscanthus sinensis. We considered that the semi-natural grassland, which is formed between the pine forest and the semi-stable zone, is the primary habitat of D. superbus.
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  • Influences of gap size on growth of native plants transplanted into an Imperata cylindrica grassland: Does growth form matter ?
    Shinha ABE, Susumu YAMADA, Masayuki NEMOTO, Toshiya OKURO
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 91-96
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.91
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    When native species are transplanted to restoration sites, the amount of growth in planted individuals depends on the gap size between plants. The influence of gap size can also be affected by the growth form of the planted species. Five native species, two with procumbent thalli and three with epigeal cotyledons, were transplanted into 15-cm and 30-cm gaps in an Imperata Cylindrica grassland. The plants with procumbent thalli grew significantly better in the 30-cm gaps, whereas the plants with epigeal cotyledons grew equally well in 15-cm and 30-cm gaps. There is a need to determine whether the transplants can prevent invasion by other species.
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  • The effects of initial size and competing trees on the growth of Quercus glauca Thunb. and Quercus myrsinaefolia Blume. in a large-scale mature urban forest
    Keizo TABATA, Hiroshi HASHIMOTO, Yukihiro MORIMOTO
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 97-102
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.97
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    We examined relationship between basal area increments of Quercus glauca and Quercus myrsinaefolia, and two affecting factors, initial size and competitive environments. There were positive correlations between basal area increments of these two species and their initial basal area. Growth of Q. glauca and Q. myrsinaefolia were affected by competing trees within 6 and 8 m radius of the target trees, respectively. Initial size and the best competition index could explain a large proportion of basal area increment for Q. glauca (54%) but couldn't for Q. myrsinaefolia (41%). This suggested other factors influenced on growth of Q. myrsinaefolia.
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  • Reconstruction of establishment process in a secondary deciduous broad-leaved forest by tree ring analysis
    Masumi USUDA, Takushi MAKIMOTO, Yasuaki AKAJI, Muneto HIROBE, Keiji SA ...
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 103-108
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.103
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    We estimated establishment process of the secondary deciduous broad-leaved forest, based on the establishment and growth processes of dominant tree species detected by tree ring analysis. In the period of coppicing, many trees frequently showed releases, which suggest many remaining individuals abruptly grew by the disturbance of coppicing. Around the beginning of the abandonment, it is likely that Quercus serrata and Prunus jamasakura were most frequently established. Ratios of individuals showing suppressed growth increased in the succession after the abandonment. On the other hand, releases discontinuously occurred, which suggests disturbances by fallen trees occurred in the process of succession.
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  • The similarity of the forest structure between a revegetated slope established by natural planting technique about 20 years ago and the surrounding natural forest
    Nana SAKAKIBARA, Keiko NAGASHIMA, Chiho SHIMADA, Kenichi TAKADA, Kazuh ...
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 109-114
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.109
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    In order to evaluate the similarity between two slopes in Takayama city, we investigated the forest structures between a revegetated slope by natural planting technique developed about 20 years ago and the surrounding natural forest. According to the tree census, the revegetated slope was in initial successional stage and the natural forest was in late stage. Therefore, little similarity was found between the two sites. However, seedlings detected in the natural forest were observed in the understory of the revegetated slope. Hence, if succession proceeds, the vegetation will become the same vegetation as that found in the natural forest.
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  • Change of the forest floor vegetation grown in the urban wild habitat garden “Inochi-no-mori” in the last decade
    Zhihao YE, Kentaro MURAKAMI, Yukihiro MORIMOTO
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 115-120
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.115
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    In this study, plant species composition in the reclaimed urban wildlife habitat “Inochi-no-mori” was investigated to verify the cause of the latest decline in plant species diversity using the ordination technique DCA. DCA results indicated that the relative illuminance ratio and the soil water content declined in this site in 2013 compared with that in 2003. It was estimated that such environmental changes were caused by canopy closing because of the succession and evapotranspiration increase caused by the growth of trees. Correspondingly, the number of pteridophytes and ruderal plants decreased, whereas that of shade-tolerant species or drought-tolerant species increased.
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  • Relationship between fern vegetation and climatic factors in the urban matrix of the Chugoku district, Japan
    Kentaro MURAKAMI, Yukihiro MORIMOTO
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 121-126
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.121
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    In this research, the relationship between the species composition of ferns grown in urban anthropogenic habitats and climatic factors was investigated in the Chugoku district, Japan. Results showed that the species composition of ferns in this district was most strongly affected by the warmth index of Kira or solar radiation using TWINSPAN and classification tree analysis. The assumed location of the fern species composition types were illustrated on the map using the classification tree analysis dendrogram. In this map, we pinpointed the areas where subtropical species are predicted to be introduced with rising temperature due to climate change.
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  • Succession of plant communities revegetated by promoting natural plant invasion using a vegetation-mat in the Chugoku, Shikoku, and Kinki regions of Japan
    Koh NAKAMURA, Shinji TANIGUCHI, Akira SAKAMAKI, Nobuo FUJIWARA
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 127-132
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.127
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    To evaluate revegetation, we established 7 plots. Each plot was set up with a vegetation-mat without seeds. For up to 7 years thereafter, we continuously surveyed the vegetation of each plot. They showed different succession by site condition, at 57 months after establishment, the percentage vegetation cover in all plots were over 50%; furthermore, the dominance of trees (DT) had increased. To evaluate the revegetation, we used ecological indices. Based on the increase in the number of emergent species, restoration was deemed to have occurred in 5 plots. However, the H' diversity index, quotient of similarity and degree of succession of all plots had not increased continuously, indicating that all the plots were still in the early stages of restoration.
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  • Effects of goat grazing on vegetation changes in bamboo clear-cut site
    Megumi ISHIDA, Kouji KUROGOME, Masato YAYOTA, Kazuya DOI
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 133-138
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.133
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    In a bamboo (Phyllostachys heterocycla) stand, the effects of goats grazing on current year changes of vegetation after clear-cutting were investigated. During the investigation period, the cumulative cover degrees of the bamboo kept continuously in lower level in the grazing sites, but increased largely in the ungrazing site. The cumulative cover degrees of the bamboo had the negative high correlation with diversity indices of plant species except bamboo. It was suggested that the goat grazing after clear-cutting of bamboo stand was effective to prevent the regeneration of bamboo, and to create the species-rich grassland vegetation.
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  • The affects of development on the drying of an urban swamp in Obihiro, Hokkaido, Japan
    Mitsuru ASHIZAWA, Osamu TSUJI, Toshimi MUNEOKA, Masato KIMURA
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 139-144
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.139
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    The Oyama Swamp Park, located Obihiro, Hokkaido, is a remnant of much larger natural swamp. In recent years, the groundwater level has dropped and the ecosystem of the swamp is under stress. In order to identify the causes of this problem, the groundwater levels in the swamp and precipitation of the region were recorded. Also changes in residential land use patterns, and drainage systems that accompanied this urban development were studied. It was found that the drying of the swamp has not been caused by a lack precipitation but the impact residential development and drainage.
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  • The study of the relationship between connectivity of rural landuse and urban fringe area, Kyoto city
    Azusa HAMADA, Wataru FUKUI, Makoto MIZUSHIMA
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 145-150
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.145
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    Rural space of urban fringe area is valuable biological habitat and inhabit various organism. This study was intended to clarify the relationship between connectivity of rural landuse and bird in urban fringe area by using landuse connecptivity index. As a results, the difference in connectibity index occurs at the point with the landuse of the same area. There exists the rerationship between the connectibity index of the paddy field and water bird. There is also relationship between the connectibity index of the field and Alauda arvensis. It is suggested that the connectivity of the land is affecting a particular birds.
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  • Discrimination of Trachelospermum plants commercially distributed in Japan based on PCR-RFLP analysis
    Azusa UEMACHI, Wataru FUKUI
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 151-156
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.151
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    We conducted PCR-RFLP analyses for the rp/16 intron in cpDNA and ITS regions in nrDNA to discriminate Trachelospermum plants commercially distributed for landscaping in Japan. The results of PCR-RFLP analyses for the rp/16 intron suggested that T. jasminoides from China could be discriminated from T. asiaticum and T. jasminoides from Japan. However, the results of PCR-RFLP analyses for the ITS regions showed that discrimination between T. jasminoides and hybrids of T. asiaticum and T. jasminoides was impossible, because T. jasminoides showed nucleotide additivity in the ITS regions. Although morphological characteristics were also investigated, morphological intermediate individuals were not found.
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  • Investigation and analysis on current status of the tsunami-stricken coastal forest using high-resolution images prepared by unmanned aerial vehicle
    Satoshi OSAWA, Takeki IZUMI, Erika NANAUMI, Mikiko ISHIKAWA
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 157-162
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.157
    JOURNAL FREE ACCESS
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    We investigated the current conditions of trees that were affected by the recent huge tsunami in the coastal forest of Iwanuma City, Miyagi Prefecture, Japan, using high-resolution images prepared by unmanned aerial vehicle and by conducting field survey. The difference in canopy textures on the images could help us distinguish between Pinus thunbergii and P. densiflora, whereas the distinction between species was difficult among broadleaf trees. The vegetation from the coast inward comprised 1) Robinia pseudoacacia, 2) P. thunbergii, 3) P. densiflora, 4) Cerasus jamasakura-P. densiflora mixed woods, or 4) wet grassland. The number of P. thunbergii increased abruptly at around 280 m from the coastline because of the microtopography of the beach ridge. Distribution of P. thunbergii and P. densiflora was strongly influenced by planting and vegetation management rather than the salt tolerance of those two species on the backside of the coastal forest.
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  • Tree height measurement from aerial images taken by a small Unmanned Aerial Vehicle using Structure from Motion
    Taichi TAMURA, Akira KATO, Hiroyuki OBANAWA, Toshiya YOSHIDA
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 163-168
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.163
    JOURNAL FREE ACCESS
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    Structure from Motion (SfM) is an advanced photogrammetry. In this study, three-dimensional data is taken by a small Unmanned Aerial Vehicle (UAV). Our study area is Uryu experimental forest of Hokkaido University. In this study, aerial images by a small UAV using SfM are used and applied to provide three-dimensional data of the forest. Tree height measurement from the UAV was compared with field measurement under the different condition of tree species, seasonal change, and terrain slope. The results suggest that seasonal change could largely affect the accuracy of the tree height measurement using a UAV.
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  • Mitigation effect of urban heat island from forest canopy structure of urban forest
    Akira KATO, Yuma OKITSU, Nobumitsu TSUNEMATSU, Tsuyoshi HONJYO, Tatsua ...
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 169-174
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.169
    JOURNAL FREE ACCESS
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    Urban forest is expected to mitigate heat island. Conventional study only focuses on tree height effect for the mitigation, does not count on forest canopy structure. In this study, the different forest canopy structure is compared with the surface temperature data. As a result, canopy thickness prevented from increasing daytime surface temperature and decreasing nighttime surface temperature to moderate the temperature change between day and night. Therefore, the development of forest canopy structure helps to improve the mitigation effect of heat island in urban forest.
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  • The thermal environment improvement effects of a green curtain on an outdoor balcony using the indices of SET* and PMV
    Hirotaka SUZUKI, Masashi KATO, Yasuo KUWASAWA, Shigeru FUJITA
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 175-180
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.175
    JOURNAL FREE ACCESS
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    This study was intended to evaluate the cooling effects of green curtains. We conducted the experiments with and without a green curtain. As the result of installing a green curtain, the solar transmittance indicated 0.17 and net radiation was reduced about 20 %. We calculated the indices of SET* and PMV from measuring data. The value of SET* at the peak in the daytime was reduced by 1 to 2 ℃ with a green curtain below the level without a green curtain. The value of PMV was increased to +3 at the peak time in both cases.
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  • Study to estimate the transpiration rate of a single tree by leaf using lysimeter and porometer method
    Jun TESHIROGI, Masayuki YANAGI, Taiki UCHIDA
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 181-186
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.181
    JOURNAL FREE ACCESS
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    To evaluate mitigation effect by trees of urban heating, it is important to obtain transpiration per area of tree crown projection, which can easily be utilized for environmental and/or construction industries not only for greening one. Using actual Zelkova serrata, we measured transpiration by Lysimeter (L) and Porometer (P) in 12 hours of daytime in mid-summer. The ratio of values (L:P) turned out to be 1.00 : 0.83, implicating possibility or usefulness of Porometer method which gives the results of measurement on site.
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  • Relation between users' activity in urban green space and social states of neighborhood residents based on an online questionnaire survey: A case study in the Koto ward, Tokyo
    Yoshitaka OTSUKA, Mamoru NASU, Yosuke WATANABE, Yukiko TAKAOKA, Yutaka ...
    Article type: ORIGINAL ARTICLE
    2015 Volume 41 Issue 1 Pages 187-192
    Published: 2015
    Released on J-STAGE: April 19, 2016
    DOIhttps://doi.org/10.7211/jjsrt.41.187
    JOURNAL FREE ACCESS
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    An online questionnaire survey was conducted for neighborhood residents in the Koto ward, Tokyo for investigating the association between the use of urban green spaces and socioeconomic status. The results of factor analysis indicated that the two factors demonstrated “complacence” and “deprivation.” The results of the chi-square test indicated that residents with a good socioeconomic status use urban green spaces more frequently. Further, some activities in urban green spaces were associated with complacence and deprivation of the residents. Therefore, our results reveal that the use of urban green spaces is associated with the socioeconomic status.
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