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 31, Issue 1
Displaying 1-46 of 46 articles from this issue
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Original Articles
  • Seed bank and seed rain of woody species in a Chamaecyparis obtusa-dominated suburban secondary forest
    Yuhei ABE, Shozo SHIBATA, Asami NAKANISHI, Naoya OSAWA
    2005 Volume 31 Issue 1 Pages 3-8
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.3
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    We examined the seed bank and seed rain to assess the role of the potential for succession of vegetation in a Camaecyparis obtusa-dominated suburban secondary forest. The result obtained here showed that seed bank had the potential for restoring the present vegetation to the previous Pinus densiflora- and deciduous broad leaf- dominated forest, and that seed supply by birds was low at the place without a roost tree. These results suggest that Chamaecyparis obtusa-dominated vegetation causes less seed supply by birds due to less roost tree, which changes the composition of seed bank, resulting in the reduction of the succession potential for the previous vegetation.
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  • Study on the evaluation of the forest structure in buffer green belts in Himeji City
    Hirotaka SUZUKI, Atushi USUI, Kenichiro FUJISAKI, Yoritaka TASHIRO
    2005 Volume 31 Issue 1 Pages 9-14
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.9
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    This study aims to verify the characteristics of the forest structure formed by "the pattern planting" method, which was developed for buffer green belts, by investigating tree and plant species in Nakashima district, Himeji city, Hyogo prefecture, that were planted about 30 years ago. The relationships were analyzed between forest structure and environmental factors regulating the structures, such as canopy openness, relative light intensity, and soil conditions, and the growth of trees was quantitatively evaluated using indices such as degrees of congestion, diversity, and vitality. Close correlations were found between relative light intensity and number of species, and between humus content and number of species. The forest was highly congested as a whole, and the degree of vitality was over 2. The results suggest that the forest is in a poor condition and that the degree of diversity increased due to the mixing and predominance of deciduous trees.
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  • A study of diagnostic indices of vitality of Prunus jamasakura)
    Asuka SATOMURA, Junichi IMANISHI, Yukihiro MORIMOTO, Aiichiro KOJIMA
    2005 Volume 31 Issue 1 Pages 15-20
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.15
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    Quantitative data are currently extremely limited regarding diagnosing vitality of Prunus jamasakura. It is a reason of inadequate management of unhealthy trees at many places. Therefore a study to obtain candidates of indices for diagnosing Prunus jamasakura was conducted as the first stage of the diagnosis system development. Various indices were compared between excellent and declined trees at two sites in Kyoto city. As a result, there were significant differences between excellent and declined trees in chlorophyll meter values, bud scale-scars, daily differences of sap wood temperature, leaf areas and net photosynthetic rates at saturation. Additionally, it was indicated that heat pulse velocity and stem growth which can be automatically and continuously measured were also likely to be the candidates of effective diagnostic indices.
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  • Planting experiments of Glehnia littoralias for the rooftop gardening
    Masayuki KOMINE, Junko MORIMOTO, Takehiko KATSUNO
    2005 Volume 31 Issue 1 Pages 21-26
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.21
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    A planting experiment of Glehnia littoralias was conducted with the aim of the application of it to the rooftop gardening. The growth in 16 treatments combining four types of soil (sand, leaf mold, mixed soil of leaf mold and sand, artificial lightweight soil), two types of soil thickness (25cm, 15cm), and two types of root treatments (control, half-cut) was surveyed. Three types of soil except leaf mold were suitable in view of the number of surviving plants. Planting with mixed soil with half-cut root and planting with artificial lightweight soil were suitable in view of green-cover area. Artificial lightweight soil and mixed soil were suitable in view of the flowering ratio. Comprehensively, planting with mixed soil with half-cut root and planting with artificial lightweight soil were the most appropriate way for the rooftop gardening using Glehnia littoralias.
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  • A simulation analysis on the effectiveness of Shisen peat as a soil for roof top planting
    Kazutaka ISODA, Junichi IMANISHI, Hiroki KIMURA, Shuzo HASEGAWA, Yukih ...
    2005 Volume 31 Issue 1 Pages 27-32
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.27
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    The studies on evaluation of soils for roof top planting were mostly individual and empirical. Thus, it was difficult to evaluate effectiveness of soils independent of region and weather anomalies. Thus a model that simulates the water content change in the two types of soils, Shisen peat (organic) and pearlite (inorganic), with Zoysia matrella was developed. As a result, it could relatively accurately simulate the change in water content of thin layered roof top soils with turf grass and enabled the simulation on viability of the turf grass. The viability simulation showed that the soil that utilizes Shisen peat as a basic medium was more effective and reduces management efforts.
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  • Study on flowering of Ludwigia peploides ssp. stipulacea and the insectan fauna on its communities in urban river
    Satoshi OSAWA, Hitoshi KOJIMA, Takehiko KATSUNO
    2005 Volume 31 Issue 1 Pages 33-38
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.33
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    We researched flowering of a vulnerable plant species Ludwigia peploides ssp. stipulacea and the insectan fauna on its communities in urban river in the eastern Kanagawa. By investigating all growth ranges, the flower of a large number which exceed 11,000 pieces was counted in the summer in 2004. As its communities grow widely, much flowering is considered to be seen continuously in a river in the summer. 8 orders 32 families 54 species of Insecta was recognized as a result of the sweeping method investigation conducted on Ludwigia peploides ssp. stipulacea communities from May to September in 2003. It was guessed that it originated in this comparative poor insectan fauna almost not having the good natural environment in the surroundings of the river. It was judged towards restoration of insectan fauna that this river needed to be connected revegetation sites by ecological network. For much flowering of Ludwigia peploides ssp. stipulacea in this urban river, the possibility that the number of pollinator was inadequate was implied, and understanding of the negative influence and negative relief surfaced as a subject.
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  • Environmental characteristics of the habitat of Sea aster (Aster tripolium L.) at Kinokawa River
    Kazuya TAKAHASHI, Daichi FUJITA, Takuya SHIRAHASE, Yusuke YOSHIYASU
    2005 Volume 31 Issue 1 Pages 39-44
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.39
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    Sea aster (Aster tripolium L.) which grows on costal marshes is an endangered species due to the modification of rivers and land development according to the Red Data Book (Ministry of Environment (2000)). This paper aims to illustrate the characteristics of the habitat of Sea aster at Kinokawa River. The Sea aster at Kinokawa River grows on the average flood level mark and behind high-density riparian plant vegetation which consists of reed (Phragmites communis Trin.), Carex scabrifolia Steud., and so on. The soil consists of sandy gravels. It is considered that gravels trap seeds and seedlings and prevent them from washing away when water levels change. The presence of high-density vegetation is considered to contribute to a protection of the habitat by preventing bank erosion as well as trapping seeds and seedlings.
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  • Relation between community expansion of Phragmites japonica Steudel and disturbing from river
    Fuyuki TAZAKI, Taizo UCHIDA
    2005 Volume 31 Issue 1 Pages 45-50
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.45
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    In this study, we assumed that lateral buds elongated from cut culms by disturbing from river contribute to expand Phragmites japonica Steudel communities. First of all, it was examined on the characteristics of lateral buds elongate from the culms. As the results show; elongation of lateral buds and formation of adventitious roots from the culms were observed although culm length, dryness rate of culms and temperature often influenced on those. These results would indicate cut culms by disturbing from river contribute to expand their communities, and the hypothesis in this study would be certified. In addition, it was investigated on the morphological characters of the community after disturbing from river. As a result, it would be also suggested that the highly rate of culms in the community outflowed by disturbing from river.
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  • Herbaceous plant species richness and species distribution pattern at fragmented forests in Kyoto City
    Ayumi IMANISHI, Kentaro MURAKAMI, Junichi IMANISHI, Yukihiro MORIMOTO, ...
    2005 Volume 31 Issue 1 Pages 51-56
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.51
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    We investigated 1)the relationships between species richness of herbaceous plants and environmental variables of landscape scale, 2)species distribution pattern and characteristics of species which are likely to depart from nested distribution pattern at 12 fragmented forests in Kyoto city in order to contribute to the ecological urban greenery planning. Consequently, there was a strong relationship between species richness and forest area. Species distribution was significantly nested and perennials and anemochores, endozoochores relatively departed from nested pattern. Moreover, species recorded at one fragmented forest did not significantly depart from nested pattern. Thus, it was deemed a basically acceptable option to emphasize the conservation of the fragmented forests at the upper level of nested subsets.
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  • Characteristics of habitat of rare plant Viola hirtipes S. Moor at secondary Quercus serrata Thunb. forest in Hiki Hill, Japan
    Jun NEMOTO, Fumie TERASHITA, Masaki ISHIKAWA, Toshiyuki UCHIDA, Ichiro ...
    2005 Volume 31 Issue 1 Pages 57-62
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.57
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    Viola hirtipes S. Moor is perennial plant mainly living at herbaceous field or sparse woods and is so rare that it is endangered in some prefectures. Thus the conservation or the preservation of Viola hirtipes is wished. To grasp the characteristics of habitat of Viola hirtipes, we investigated density of individuals, percentage of flowering or fruiting, topology, vegetation, volumetric soil moisture content, soil hardness and relative photon flux density of habitat. As a result, density of Viola hirtipes individuals was higher mainly at the bottom of valley and the lower part of slope, where soil moisture was rich. Also under controlling vegetation by clearcutting, bushcutting and removing litter, where relative photon flux density in summer was higher, percentage of flowering or fruiting was also higher.
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  • Studies on seed dispersal of restored Aster kantoensis populations on Tama River Floodplain
    Noboru KURAMOTO, Mie KOBAYASHI, Syoji SUGIYAMA, Yasuhiro NOMURA, Youic ...
    2005 Volume 31 Issue 1 Pages 63-68
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.63
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    Dispersal of Aster kantoensis seeds by wind was studied on the populations restored at Nagata zone on the floodplain of the Tama River since dispersal of the seeds was important for the aspect of metapopulation dynamics. Many seeds were dispersed on leeward of prevailing wind, however several were dispersed on windward. The most seeds flight lower than the general height of tall grass community in middle reaches. Therefore, we inferred that there was the risk that many seeds were caught by the surrounding tall vegetation. The maximum distance of the wind dispersal was estimated 250m, which was longer than 30m estimated by previous study. We suggested that the seed dispersal of Aster kantoensis by wind had resulted in the seedling emergence on a newly created site composed of gravel, and we obtained a prospect of metapopulation dynamics recovery.
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  • The effect of the offshore breakwater on the settlement of the coastal vegetation on an artificial beach of Seto Inland Sea
    Yoshio SASAKI, Yukihiro MORIMOTO
    2005 Volume 31 Issue 1 Pages 69-74
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.69
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    We selected the artificial beach around the Seto Inland Sea in Hyogo prefecture, and set up two different wave conditions controlled by the existence of offshore breakwater, to investigate current plant species, vegetation structure, and soil environmental factors: such as particle size, water content, and salinity. Using the method of TWINSPAN classification, the study sites could be classified into four types according to the characteristics of their plant communities. CCA ordination found out strong relationship between the salinity after typhoon passing and the zonation of these coastal plants. Also, we found that in the beach without breakwater, the salinity was high and the rate of bare surface was largest. On the other hand, in the beach with one, the salinity was low and the rate of the area dominated by perennial plants and dwarf woods was largest. These results suggested that management of the coastal vegetation is possible, on the condition that the sea wave would be controlled by the offshore structures.
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  • Effects of temperature fluctuation, water potential and litter on seed germination and emergence of pokeweed (Phytolacca americana L.)
    Akihiro NAKAMURA, Maiko SHIOTA, Keisuke KADOYA
    2005 Volume 31 Issue 1 Pages 75-80
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.75
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    Emergence under irrigated or covering litter treatments in a gap and beneath caopy, germination at four levels of water potential under simulated temperature fluctuation regime were measured for pokeweed. Germination was reduced and prolonged with decrease in water potential. Emergence was inhibited by low temperature fluctuation and litter. The emergence patterns in canopy gap resembled with that of PEG 10 % treatment under simulated temperature regime. Germination of pokeweed was affected by temperature fluctuation than water potential in a field.
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  • Seed germination and growing to the flowering individuals of Oxytropis megalantha H. Boiss., an endangered species
    Tetsuya KONDO, Miyuki NISHIZAWA, Masashi SHIMADA
    2005 Volume 31 Issue 1 Pages 81-86
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.81
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    Oxytropis megalantha H. Boiss. (Leguminosae) is an endemic species in Rebun Island, Hokkaido. It is listed in the red data book published by Environment Agency and Hokkaido, as "Critically Endangered" and "Endangered", respectively. Effects of temperatures and sulfuric treatment on germination were investigated in an incubator. Since seeds have a physical dormancy, non–treated seeds show the germination of about 10% or less. Treatment with concentrated sulfuric acid for 10–40 min caused cracks or cavities on the seed coat and water absorption became possible, then a high germination rate was attained within 10 days after sowing. Non–dormant seeds treated with sulfuric acid germinated to 71–77% at wide temperature range of 10–30°C, 10 days after sowing. Individuals came to flower from late May to mid–August next year, when seeds treated with sulfuric acid were sown in late May, seedlings were transplanted in the pot, and they were grow in the green house.
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  • The measurement of soil microbial activity by FDA hydrolysis method and its controlling factors in the Semi-arid land zone of northern Loess Plateau
    Long BAI, Terumasa TAKAHASHI, Tatsuaki KOBAYASHI, XingChang ZHANG, Min ...
    2005 Volume 31 Issue 1 Pages 87-91
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.87
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    soil and vegetation surrey was conducted in 50 plots in Shenmu test area, which is located in the northern Loess Plateau. Floristic composition, plant biomass, soil carbon and nitrogen contents, and soil microbial activity were measured. Soil carbon and nitrogen contents had positive co-relationships with vegetation coverage. FDA hydrolysis activity had a close positive relationship with soil carbon contents. Consequently, microbial activity increased due to the development of vegetation. FDA hydrolysis activity declines in the plots of high pH and hardening of the soil.
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  • Genetic variation analysis using the RAPD method for mangrove forests in Oman
    Yasuhito YAMAGUCHI, Naoko MIKI, Ken YOSHIKAWA
    2005 Volume 31 Issue 1 Pages 92-96
    Published: 2005
    Released on J-STAGE: March 03, 2007
    DOIhttps://doi.org/10.7211/jjsrt.31.92
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    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.
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