Papers - YAMADA Susumu
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Fast grassland recovery from viable propagules after reintroducing traditional mowing management on a steep slope Reviewed International coauthorship
Yamada S, Yoshida W, Iida M, Kitagawa Y, Mitchley J
PeerJ 12:e17487 2024.06
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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How do “biodiversity conservation considerations” change the vegetation management methods?
Yamada Susumu, Nakayama Yuichiro
Weeds and Vegetation Management 16 ( 0 ) 13 - 26 2024.12
Language：Japanese Publisher：Institute for Urban Weed Science
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Effectiveness of sand-fixing measures for restoration of vegetation and mitigation of wind erosion and deposition in a degraded sandy rangeland, northern China Reviewed International journal
Kono A, Kimura K, Yamada S, Koyanagi TF, Yamanaka N, Yoshikawa K, Tsuchiya K, Okuro T
Ecological Engineering 211 107456 2024.11
Language：English Publishing type：Research paper (scientific journal)
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Difference of soil seed banks of four wetland habitats in a hilly rice agro-ecosystem of Japan
NAKAYAMA Etsuko, YAMADA Susumu
Journal of the Japanese Society of Revegetation Technology 50 ( 1 ) 135 - 138 2024.08
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPANESE SOCIETY OF REVEGETATION TECHNOLOGY
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朝霧高原根原地区の半自然草原におけるススキ（Miscanthus sinensis）およびヨシ（Phragmites australis）優占群落下の土壌断面形態と理化学的特徴 Reviewed
中塚博子・木村有希・山田晋・野口有里紗
ペドロジスト 68 3 - 18 2024.02
Language：Japanese
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ASSESSMENT OF LIGHT ENVIRONMENT FOR HERBACEOUS VEGETATION IN SEMI-NATURAL GRASSLAND USING TIME-SERIES UAV DATA Reviewed
Miura N. Niwa Y. Yamada S.
ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci. X-1/W1-202 1081 - 1088 2023.08
Authorship：Last author Language：English
DOI： https://doi.org/10.5194/isprs-annals-X-1-W1-2023-1081-2023
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Relationship between dominant species, vegetation composition and species attributes in spring and autumn on a riverbank: implications for river management to enhance ecosystem functions Reviewed International coauthorship
Yamada S, Saito H, Nemoto M, Mitchley J
Landscape and Ecological Engineering 19 1 - 12 2023.02
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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Current status and potential of greening with native herbaceous plants
OKURO Toshiya, YAMADA Susumu
Journal of The Japanese Institute of Landscape Architecture 86 ( 4 ) 302 - 305 2023.01
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Institute of Landscape Architecture
DOI： 10.5632/jila.86.302
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Where and how indigenous species in grasslands are introduced in the UK?
Yamada S
Journal of The Japanese Institute of Landscape Architecture 86 ( 4 ) 342 - 345 2023.01
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Institute of Landscape Architecture
DOI： 10.5632/jila.86.342
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在来の草本植物を用いた植栽事業の現状と可能性
山田 晋
ランドスケープ研究 86 302 - 305 2023
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Grazing and heat stress protection of native grass by a sand-fixing shrub in the arid lands of northern China Reviewed
Kimura K, Kono A, Yamada S, Koyanagi TF, Okuro T
Journal of Arid Land 14 867 - 876 2022.08
Language：English Publishing type：Research paper (scientific journal)
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Classification of Grass and Forb Species on Riverdike Using UAV LiDAR-Based Structural Indices Reviewed
Miura Naoko, Koyanagi Tomoyo F., Yamada Susumu, Yokota Shigehiro
International Journal of Automation Technology 15 ( 3 ) 268 - 273 2021.05
Language：English Publishing type：Research paper (scientific journal) Publisher：Fuji Technology Press Ltd.
<p>Herbaceous vegetation on riverdikes plays an important role in preventing soil erosion, which, otherwise, may lead to the collapse of riverdikes and consequently, severe flooding. It is crucial for managers to keep suitable vegetation conditions, which include native grass species such as <i>Imperata cylindrica</i>, and to secure visibility of riverdikes for inspection. If managers can efficiently find where suitable grass and unsuitable forb species grow on vast riverdikes, it would help in vegetation management on riverdikes. Classification and quantification of herbaceous vegetation is a challenging task. It requires spatial resolution and accuracy high enough to recognize small, complex-shaped vegetation on riverdikes. Recent developments in unmanned aerial vehicle (UAV) technology combined with light detection and ranging (LiDAR) may offer the solution, since it can provide highly accurate, high-spatial resolution, and denser data than conventional systems. This paper aims to develop a model to classify grass and forb species using UAV LiDAR data alone. A combination of UAV LiDAR-based structural indices, V-bottom (presence of vegetation up to 50 cm from the ground) and V-middle (presence of vegetation 50–100 cm from the ground), was tested and validated in 94 plots owing to its ability to classify grass and forb species on riverdikes. The proposed method successfully classified the “upright” grass species and “falling” grass species / forb species with an accuracy of approximately 83%. Managers can efficiently prioritize the inspection areas on the riverdikes by using this method. The method is versatile and adjustable in other grassland environments.</p>
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YAMADA Susumu, MITSUI Yuki, TAKAGISHI Kei, MIYAMOTO Futoshi
Journal of The Japanese Institute of Landscape Architecture 84 ( 5 ) 693 - 698 2021.03
Language：Japanese Publisher：Japanese Institute of Landscape Architecture
<p>Mowing of dominated <i>Pleioblastus chino</i> (Franch. et Sav.) Makino is effective to enhance species richness in a ground flora of abandoned <i>Quercus serrata</i> forests. Frequent mowing (i.e. double or more in a year) is suitable to control overgrown <i>P. chino</i>, even if managed for a relatively short term (<several years). However, there are few studies aiming at the recovery of floristic diversity with such a frequent- and a short-term-mowing. One-year mowing (double-, triple-, and non-mowing) was carried out to monitor the recovery of ground flora until the following year. Greater number of species was observed in both double- and triple-mown plots than an un-mown plot. Species favoring brighter ground occurred more frequently in triple- than double-mown plots, although species richness was not different significantly between them. Triple mowing, rather than double, would be effective as an intensive and relatively short-term management to enhance species particularly suitable in brighter grounds. However, relative illuminance was not enough to survive species representing well-managed forests (i.e. common to semi-natural grasslands). Worse, <i>P. chino</i> biomass in triple-mown plots was unsuccessful in reduction compared with double-mown plots in the next year of mowing. Triple mowing should, thus, continue at least two years to inhibit <i>P. chino</i> for longer time, and to enhance species richness further.</p>
DOI： 10.5632/jila.84.693
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高解像度で撮影したUAVデータを用いたススキのバイオマスの推定
丹羽悠二・三浦直子・山田晋・根本正之
ランドスケープ研究技術報告 11 154 - 157 2021.03
Language：Japanese Publishing type：Research paper (scientific journal)
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Season and plant life history stage in revegetation influence competition of foundation species, subordinate species, and weeds in a reclaimed grassland Reviewed
Yamada S, Nemoto M, Okuro T
Ecological Engineering 162 2021.02
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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Yamada Susumu
Weeds and Vegetation Management 13 ( 0 ) 1 - 12 2021
Language：Japanese Publisher：Institute for Urban Weed Science
DOI： 10.24463/iuws.13.0_1
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The effects of growth form on the impact of companion planting of nectar-producing plant species with Sedum album for extensive green roofs Reviewed
Matsuoka T, Tsuchiya K, Yamada S, Okuro T
Urban Forestry & Urban Greening 56 2020.12
Language：English Publishing type：Research paper (scientific journal)
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Estimation of canopy height and biomass of Miscanthus sinensis in semi-natural grassland using time-series UAV data Reviewed
Miura, N., Yamada, S., Niwa, Y.
ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci. V-3 497 - 503 2020.08
Language：English Publishing type：Research paper (scientific journal)
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Landscape monitoring system using UAV - case study: Asagiri plateau -
Niwa Yuji, Miura Naoko, Nemoto Masayuki, Yamada Susumu
The Japanese Forest Society Congress 131 ( 0 ) 373 2020.05
Language：Japanese Publisher：THE JAPANESE FORESTRY SOCIETY
<p>[in Japanese]</p>
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YAMADA Susumu, NEMOTO Masayuki
Journal of The Japanese Institute of Landscape Architecture 83 ( 5 ) 731 - 736 2020.03
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Institute of Landscape Architecture
<p>Application of seed-containing plant material is a major technique to transfer plant species onto restoration sites. The present study intended to clarify the effects of application timing and the amounts of the plant material on the subsequent vegetation development. Plant material mown from a semi-natural grassland, where <i>Miscanthus sinensis</i> dominated, was taken in late October. Harvested material was scattered onto soil in three different dates ( November, March and July) and two levels of amounts (app. 500 g/m<sup>2</sup> and volume-reduced to app. 250 g/m<sup>2</sup>). A total of 23 target species appear ed from the plant material, which includes most of flowering species, species flowered earlier in the donor site, and those flower ing or flowered nearby. Thicker litter inhibited the emergence of non-target species, while neither positive nor negative effect on the richness and the cover of target species. Under thicker-litter treatment, <i>Lespedeza pilosa</i> was a primary dominant species at any application timing. The number of target species was not associated with the timing of application, although occurrence of several target species was inhibited in July-application treatment. This study demonstrated that thicker-litter treatment is preferable for the better restoration outcome, while effect of application timing appeared less important.</p>
DOI： 10.5632/jila.83.731