Shoko Sakai

J-GLOBAL         Last updated: Nov 15, 2018 at 12:18
Shoko Sakai
Kyoto University
Center for Ecological Research
Research funding number

Research Areas


Published Papers

Iku Asano, Itioka Takao, Kishimoto-Yamada Keiko, Shimizu-kaya Usun, Mohammad Fatimah Bte, Hossman Mohamad Yazid, Bunyok Azimah, Abd Rahman Mohd Yusuf, Sakai Shoko, Meleng Paulus
ECOLOGICAL RESEARCH   32(4) 537-545   Jul 2017   [Refereed]
S Sakai, S Metelmann, Y Toquenaga, A Telschow
Open Science   3    Jun 2016   [Refereed]
Eri Yamasaki, Eri Yamasaki, Atsushi Kawakita, Shoko Sakai
Evolutionary Ecology   29 379-390   May 2015
© 2014, Springer International Publishing Switzerland. Flowering plants have modified their floral organs in remarkably diverse ways to optimize their interaction with pollinators. Although floral organs represent a major source of floral diversit...
Masayuki Ushio, Masayuki Ushio, Eri Yamasaki, Eri Yamasaki, Hiroyuki Takasu, Hiroyuki Takasu, Atsushi J. Nagano, Atsushi J. Nagano, Shohei Fujinaga, Mie N. Honjo, Mito Ikemoto, Shoko Sakai, Hiroshi Kudoh
Scientific Reports   5    Jan 2015
Microbes are easily dispersed from one place to another, and immigrant microbes might contain information about the environments from which they came. We hypothesized that part of the microbial community on a flower's surface is transferred there ...
Yuji Tokumoto, Shoko Sakai, Michinari Matsushita, Tatsuhiro Ohkubo, Michiko Nakagawa
Biotropica      Aug 2014
Continually flowering plants bloom continuously throughout the year, as often seen in plants distributed along the roadsides or in the understory layers in Southeast Asia's tropical rain forests. Dillenia suffruticosa (Griff. ex Hook. f. and Thoms...
Eri Yamasaki, Yoko Inui, Shoko Sakai
Plant Species Biology   29 232-241   Jan 2014
In protective ant-plant mutualisms, plants offer ants food (such as extrafloral nectar and/or food bodies) and ants protect plants from herbivores. However, ants often negatively affect plant reproduction by deterring pollinators. The aggressive p...
Glob Environ Res   18(2) 133-143   2014
Keiko Kishimoto-Yamada, Koichi Kamiya, Paulus Meleng, Bibian Diway, Het Kaliang, Lucy Chong, Takao Itioka, Shoko Sakai, Motomi Ito
PLoS ONE   8    Sep 2013
There are very few studies that have investigated host-specificity among tropical herbivorous insects. Indeed, most of the trophic interactions of herbivorous insects in Southeast Asian tropical rainforests remain unknown, and whether polyphagous ...
Tropics   22(1) 19-25   Jun 2013
Shoko Sakai, Atsushi Kawakita, Kazuyuki Ooi, Tamiji Inoue
American Journal of Botany   100(3) 546-555   Mar 2013
Premise of the study: Diversification of floral traits in angiosperms is often attributed to have been driven by adaptations to pollinators. Nevertheless, phylogenetic studies on the relationships among evolutionary changes in floral traits and po...
Eri Yamasaki, Atsushi Kawakita, Shoko Sakai
American Journal of Botany   100(3) 628-632   Mar 2013
Premise of the study: Nectar is the most common reward provided by animal-pollinated flowers. Diversity in position and structure of floral nectaries suggests that floral nectar production evolved repeatedly, but the evolutionary origins are not w...
Eri Yamasaki, Shoko Sakai
Australian Journal of Botany   61 60-66   Feb 2013
Relatively few flowering plants show ambophily (pollination by both wind and insects), and whether and when ambophily is advantageous has not been studied well. In the present study, we report ambophily in two dioecious pioneer tree species, Mallo...
Michiko Nakagawa, Kuniyasu Momose, Keiko Kishimoto-Yamada, Tamaki Kamoi, Hiroshi O. Tanaka, Michi Kaga, Satoshi Yamashita, Takao Itioka, Hidetoshi Nagamasu, Shoko Sakai, Tohru Nakashizuka
Biodiversity and Conservation   22 127-140   Jan 2013
Human-modified forested landscapes are prevalent in the tropics, and the role of complex mosaics of diverse vegetation types in biodiversity conservation remains poorly understood. Demographic traits and the spatial pattern of biodiversity are ess...
Michiko Nakagawa, Michinari Matsushita, Hiroko Kurokawa, Hiromitsu Samejima, Yayoi Takeuchi, Masahiro Aiba, Ayumi Katayama, Yuji Tokumoto, Tomonori Kume, Natsuko Yoshifuji, Koichiro Kuraji, Hidetoshi Nagamasu, Shoko Sakai, Tohru Nakashizuka
Biotropica   44 715-719   Nov 2012
We tested the effect of general flowering (GF), community-wide masting, and drought stress on current-year tree diameter growth and aboveground biomass increment (ABI). General flowering but not drought had a marginally significant negative effect...
William F. Laurance, William F. Laurance, D. Carolina Useche, Julio Rendeiro, Margareta Kalka, Corey J A Bradshaw, Sean P. Sloan, Susan G. Laurance, Mason Campbell, Kate Abernethy, Patricia Alvarez, Victor Arroyo-Rodriguez, Peter Ashton, Julieta Benítez-Malvido, Allard Blom, Kadiri S. Bobo, Charles H. Cannon, Min Cao, Richard Carroll, Colin Chapman, Rosamond Coates, Marina Cords, Finn Danielsen, Bart De Dijn, Eric Dinerstein, Maureen A. Donnelly, David Edwards, Felicity Edwards, Nina Farwig, Peter Fashing, Pierre Michel Forget, Mercedes Foster, George Gale, David Harris, Rhett Harrison, John Hart, Sarah Karpanty, W. John Kress, Jagdish Krishnaswamy, Willis Logsdon, Jon Lovett, William Magnusson, Fiona Maisels, Fiona Maisels, Andrew R. Marshall, Deedra McClearn, Divya Mudappa, Martin R. Nielsen, Richard Pearson, Nigel Pitman, Jan Van Der Ploeg, Andrew Plumptre, John Poulsen, Mauricio Quesada, Hugo Rainey, Douglas Robinson, Christiane Roetgers, Francesco Rovero, Frederick Scatena, Christian Schulze, Douglas Sheil, Thomas Struhsaker, John Terborgh, Duncan Thomas, Robert Timm, J. Nicolas Urbina-Cardona, Karthikeyan Vasudevan, S. Joseph Wright, Juan Carlos Arias-G., Luzmila Arroyo, Mark Ashton, Philippe Auzel, Dennis Babaasa, Fred Babweteera, Patrick Baker, Olaf Banki, Margot Bass, Inogwabini Bila-Isia, Stephen Blake, Warren Brockelman, Nicholas Brokaw, Carsten A. Brühl, Sarayudh Bunyavejchewin, Jung Tai Chao, Jerome Chave, Ravi Chellam, Connie J. Clark, José Clavijo, Robert Congdon, Richard Corlett, H. S. Dattaraja, Chittaranjan Dave, Glyn Davies, Beatriz De Mello Beisiegel, Rosa De Nazaré Paes Da Silva, Anthony Di Fiore, Arvin Diesmos, Rodolfo Dirzo, Diane Doran-Sheehy, Mitchell Eaton
Nature   489 290-293   Sep 2012
The rapid disruption of tropical forests probably imperils global biodiversity more than any other contemporary phenomenon. With deforestation advancing quickly, protected areas are increasingly becoming final refuges for threatened species and na...
Shoji Naoe, Shoko Sakai, Takashi Masaki
Journal of Forest Research   17(2) 219-223   Apr 2012
Conversion of natural forests to other land use results not only in a decrease of forest area but also in the degradation of remnant forests as a habitat for forest animals. Although such degradation due to an increase of forest edges has been stu...
Shoji Naoe, Shoko Sakai, Ayako Sawa, Takashi Masaki
Ecological Research   26 301-309   Mar 2011
Many studies have demonstrated that forest fragmentation reduces populations of animal species and causes local extinction, triggering many cascading effects. The effect of fragmentation on animals can be exerted through various processes, but suc...
Noboru Fujita, Narantsetsegiin Amartuvshin, Yasuhiro Yamada, Kiyoshi Matsui, Shoko Sakai, Norio Yamamura
Grassland Science   55 126-134   Sep 2009
To examine different effects of herbivorous large mammals' grazing pressure on plant diversity along a slope in a Mongolian nomadic pasture, we compared species richness, Simpson's index of diversity, and the total plant coverage of plants between...
Yuji Tokumoto, Michinari Matsushita, Ichiro Tamaki, Shoko Sakai, Michiko Nakagawa
Plant Species Biology   24 104-108   Aug 2009
General flowering (GF), a supra-annual, irregular fluctuation in flowering and seeding at the community level, is a phenomenon unique to the tropical rainforests of South-East Asia. To test the animal pollination and predator satiation hypotheses,...
K. Kishimoto-Yamada, K. Kishimoto-Yamada, T. Itioka, S. Sakai, S. Sakai, K. Momose, T. Nagamitsu, H. Kaliang, P. Meleng, L. Chong, A. A. Hamid Karim, S. Yamane, M. Kato, C. A M Reid, T. Nakashizuka, T. Inoue
Bulletin of Entomological Research   99 217-227   Jun 2009
In Southeast Asian tropical rainforests, two events, severe droughts associated with the El Nio-Southern Oscillation and general flowering, a type of community-wide mass flowering, occur at irregular, supra-annual intervals. The relationship betwe...
Daisuke Fukuda, Oswald Braken Tisen, Kuniyasu Momose, Shoko Sakai
Raffles Bulletin of Zoology   57 213-221   Feb 2009
Tropical rainforests in Southeast Asia are decreasing rapidly because of conversion to agricultural lands, which in turn leads to an increase in mosaic landscapes. Little is known about the effects of these anthropogenic changes on bat fauna or fe...
Chikako Ishida, Masumi Kono, Shoko Sakai
Annals of Botany   103 39-44   Jan 2009
• Background and Aims: Macaranga(Euphorbiaceae) is a large genus of dioecious trees with approx. 260 species. To date, only one pollination study of the genus has reported brood-site pollination by thrips in M. hullettii. In this study, the pollin...
Atushi Ushimaru, Chikako Ishida, Shoko Sakai, Mitsue Shibata, Hiroshi Tanaka, Kaoru Niiyama, Tohru Nakashizuka
Journal of Apicultural Research   47 296-303   Dec 2008
We examined the relationship between flower preference and the spatial distribution of two Bombus species in a traditional agroforestry Satoyama landscape where human activities maintain a mosaic of landscape units, including old-growth and second...
Shoko Sakai, S. Joseph Wright
Biological Journal of the Linnean Society   93 125-134   Jan 2008
Heterostyly is a genetic polymorphism in which plant populations are composed of two or more morphs that differ in stigma and anther heights. The polymorphism promotes intermorph pollen transfer, thus outcrossing. Heterostyly has been reported in ...
Michiko Nakagawa, Michiko Nakagawa, Hideo Miguchi, Kaori Sato, Shoko Sakai, Tohru Nakashizuka
Raffles Bulletin of Zoology   55 389-395   Aug 2007
Lowland tropical forests of Southeast Asia are characterized by general flowering, i.e. irregular and supra-annual fluctuations in flower and fruit production at the community level. We examined the relationship between general flowering and the p...
Shoko Sakai, Rhett D. Harrison, Kuniyasu Momose, Koichiro Kuraji, Hidetoshi Nagamasu, Tetsuzo Yasunari, Lucy Chong, Tohru Nakashizuka, Tohru Nakashizuka
American Journal of Botany   93 1134-1139   Sep 2006
General flowering is a community-wide masting phenomenon, which is thus far documented only in aseasonal tropical forests in Asia. Although the canopy and emergent layers of forests in this region are dominated by species of a single family, Dipte...
Shoko Sakai, Hidetoshi Nagamasu
Blumea: Journal of Plant Taxonomy and Plant Geography   51 95-115   May 2006
This paper reports the subfamily Zingiberoideae (Zingiberaceae) of Lambir Hills National Park, Sarawak, Malaysia. Twelve species representing Boesenbergia, Globba, and Zingiber are recorded. Systematic and ecological notes are provided, and the ke...
Shoko Sakai, Shoko Sakai, Yukihiko Toquenaga
Population Ecology   46 253-262   Dec 2004
Almost all organisms in nature show nonrandom mating to different degrees. Two extreme results of nonrandom mating are speciation and sexual differentiation. Heterostyly is a form of sexual differentiation considered to have evolved to resolve con...
Shoko Sakai, Hidetoshi Nagamasu
Edinburgh Journal of Botany   60 181-216   Jul 2003
This paper completes an account of the subfamily Alpinioideae (Zingiberaceae) of Lambir Hills National Park, Sarawak, Malaysia, started in the first paper of this series (Sakai & Nagamasu, 1998), which lists 12 Amomum species from the park. Twenty...
Shoko Sakai
Journal of Plant Research   115 161-168   Dec 2002
In this paper, I review pollination systems in which plants provide breeding sites as a reward for pollination. I divide the pollinators into three groups based upon ovipositing sites and the larval food of insects. The first group consists of ovu...
Japanese Journal of Ecology   52(2) 177-187   Aug 2002
This paper reviews interactions of plants and pollinators breeding on flowers. The interactions are categorized into three groups based on resources used by larvae of the pollinators. Plants in the first group are pollinated by ovule parasites. On...
Shoko Sakai, Shoko Sakai
American Journal of Botany   89 527-534   Apr 2002
This study presents breeding and pollination systems of Aristolochia maxima and A. inflata in a seasonal tropical forest of Panama. Aristolochia is the most diverse genus of Aristolochiaceae, with ∼120 species distributed throughout the tropics an...
Shoko Sakai, Shoko Sakai
Biological Journal of the Linnean Society   75 233-247   Feb 2002
The general flowering (GF) events of forests in south-east Asia are perhaps the most spectacular phenomena in tropical biology. GF events occur at multiyear intervals. In GF, most dipterocarp species and many plants of other families come into flo...
R. H L Disney, S. Sakai
European Journal of Entomology   98 367-373   Dec 2001
Megaselia metropolitanoensis Disney, sp. n., M. sakaiae Disney, sp. n. and Puliciphora pygmaea (Borgmeier, 1960) comb. n. are reported developing in the flowers of Aristolochia inflata H.B.K. and A. maxima Jacq. in Panama. The new species are desc...
Takao Itioka, Tamiji Inoue, Het Kaliang, Het Kaliang, Makoto Kato, Teruyoshi Nagamitsu, Kuniyasu Momose, Shoko Sakai, Takakazu Yumoto, Sarkawi Umah Mohamad, Sarkawi Umah Mohamad, Abang Abdul Hamid, Abang Abdul Hamid, Seiki Yamane
Annals of the Entomological Society of America   94 545-549   Dec 2001
The giant honey bee Apis dorsata F. inhabits lowland tropical rainforests in Southeast Asia, where a general, community-wide flowering occurs at intervals of 4 yr on average. The numerical response by the honey bee population to the drastic increa...
Shoko Sakai, Shoko Sakai
American Journal of Botany   88 1527-1534   Sep 2001
Androdioecy is a rare sexual system in nature, as predicted theoretically. Among the androecious species reported so far, Castilla elastica (Moraceae) is unique in that flowers are unisexual and staminate and pistillate flowers on cosexual plants ...
S. Sakai
Population Ecology   43 77-86   Jul 2001
One of the most intriguing and complex characteristics of reproductive phenology in tropical forests is high diversity within and among forests. To understand such diversity, Newstrom et al. provided a systematic framework for the classification o...
M. Kato, T. Itioka, S. Sakai, K. Momose, S. Yamane, A. A. Hamid, T. Inoue
Population Ecology   42 97-104   Dec 2000
The population fluctuation pattern of light-attracted beetles was studied from August 1992 to September 1998 (for 73 months) using ultraviolet light-traps set at three vertical levels in a tropical lowland dipterocarp forest in Sarawak, Malaysia. ...
S. Sakai, H. Nagamasu
Edinburgh Journal of Botany   57 227-243   Dec 2000
Elettaria (Zingiberaceae) of Sarawak are studied, and eight species are recognised including four new species: E. linearicrista, E. longipilosa, E. brachycalyx and E. kapitensis. Elettaria surculosa and E. stolonifera, which have previously been i...
S. Sakai, H. Nagamasu
Edinburgh Journal of Botany   57 245-255   Dec 2000
A new monotypic genus, Tamijia (Zingiberaceae), and its species T. flagellaris are described from Sarawak, Borneo. T. flagellaris is quite unique with the lateral staminodes connate to the labellum, the plane of distichy of the leaf shoot transver...
Shoko Sakai
Japanese Journal of Ecology   50 023-039   Dec 2000
General flowering (GF) is a phenomenon unique to lowland dipterocarp forests in Southeast Asia. During GF, which occurs at irregular intervals of 3-10 years, most dipterocarp species, together with species of other families, come heavily into flow...
Shoko Sakai, Shoko Sakai, Makoto Kato, Hidetoshi Nagamasu
American Journal of Botany   87 440-445   Nov 2000
A previously undescribed pollination system involving a monoecious tree species, Artocarpus integer (Moraceae), pollinator gall midges, and fungi is reported from a mixed dipterocarp forest in Sarawak, Borneo. The fungus Choanephora sp. (Choanepho...
Shoko Sakai, Shoko Sakai
Journal of Tropical Ecology   16 337-354   Sep 2000
Reproductive phenology of 117 individuals from a total of 20 ginger species (Costaceae and Zingiberaceae) was monitored for up to 21 mo in a lowland mixed dipterocarp forest in the Lambir Hills National Park, Sarawak. Of these 20 species of iterop...
Shoko Sakai, Makoto Kato, Tamiji Inoue
American Journal of Botany   86 646-658   Dec 1999
The pollinators of 29 ginger species representing II genera in relation to certain floral morphological characteristics in a mixed-dipterocarp forest in Borneo were investigated. Among the 29 species studied, eight were pollinated by spiderhunters...
Shoko Sakai, Shoko Sakai, Kuniyasu Momose, Takakazu Yumoto, Teruyoshi Nagamitsu, Hidetoshi Nagamasu, Abang A. Hamid, Tohru Nakashizuka, Tohru Nakashizuka
American Journal of Botany   86 1414-1436   Dec 1999
The first systematic observation of a general flowering, a phenomenon unique to lowland mixed-dipterocarp forests in Southeast Asia, is presented. During general flowering, which occurs at irregular intervals of 3-10 yr, nearly all dipterocarp spe...
Shoko Sakai, Kuniyasu Momose, Kuniyasu Momose, Takakazu Yumoto, Makoto Kato, Tamiji Inoue
American Journal of Botany   86 62-69   Dec 1999
Pollination ecology of an emergent tree species, Shorea (section Mutica) parvifolia (Dipterocarpaceae), was studied using the canopy observation system in h lowland dipterocarp forest in Sarawak, Malaysia, during a general flowering period in 1996...
S. Sakai, T. Inoue
American Journal of Botany   86 56-61   Dec 1999
Lowiaceae, a family of the Zingiberales, comprise 11 species in the single genus Orchidantha. Here we present the first report on the pollination of Lowiaceae and describe a new system of dung-beetle pollination from Sarawak, Borneo. Orchidantha i...
Hidetoshi Nagamasu, Shoko Sakai, Shoko Sakai
Nordic Journal of Botany   19 149-152   Jan 1999
A new species, Orchidantha inouei, is described from Sarawak. Two types of paracladium in the inflorescence are reported with a discussion on the inflorescence morphology of Lowiaceae.
K. Momose, R. Ishii, S. Sakai, T. Inoue
Proceedings of the Royal Society B: Biological Sciences   265 2333-2339   Dec 1998
What factors determine reproductive intervals and modes of pollination in plants of the aseasonal tropics? To answer this general question, we present a new explanation for some community patterns of plant reproductive intervals and pollinators ob...
Shoko Sakai, Hidetoshi Nagamasu, Hidetoshi Nagamasu
Edinburgh Journal of Botany   55 45-64   Dec 1998
Twelve species of Amomum (Zingiberaceae) are reported from Lambir Hills, Sarawak, with systematic and ecological notes based on field observations for more than one year. Five species, Amomum angustipetalum, A. bilabiatum, A. calyptratum, A. durum...


Effects of tropical forest remnants on the assemblage of parasitoid wasps in the surrounding areas in Borneo
Paulus Meleng, Takao Itioka, Satoshi Yamashita, Fatimah Mohammad, Mohammas Nafri Ali, Mohamad Yazid Hossman, Shoko Sakai, K. Takenaka Takano, Fujio Hyodo, Yoko Takematsu, Masato Ito and Kaoru Maeto
Proceedings of the symposium “Frontier in Tropical Forest Research: Progress in Joint Projects between the Forest Department Sarawak and the Japan Research Consortium for Tropical Forests in Sarawak”      2016
Long-term monitoring of plant reproductive phenology and observation of general flowering in Lambir Hills, Sarawak
Shoko Sakai, Takao Itioka
Proceedings of the symposium “Frontier in Tropical Forest Research: Progress in Joint Projects between the Forest Department Sarawak and the Japan Research Consortium for Tropical Forests in Sarawak”      2016
Depth of water uptake and flowering frequency of dipterocarp trees
Kazuma Kawahara, Naoko Matsuo, Shoko Sakai and Michiko Nakagawa
Proceedings of the symposium “Frontier in Tropical Forest Research: Progress in Joint Projects between the Forest Department Sarawak and the Japan Research Consortium for Tropical Forests in Sarawak”      2016
日本数理生物学会大会講演要旨集   24th 89   2014
AIAA ASME SAE ASEE Jt Propuls Conf Exhib   50th Vol.3 1879-1886   2014
日本生態学会大会講演要旨(Web)   61st WEB ONLY PA1-118   2014
日本生態学会大会講演要旨(Web)   61st WEB ONLY PB2-028   2014
日本生態学会大会講演要旨集   60th 178   Mar 2013
日本生態学会大会講演要旨集   60th 91   Mar 2013
日本生態学会大会講演要旨集   60th 298   Mar 2013
環境科学会年会プログラム   2012 121   2012
日本生態学会大会講演要旨集   58th 259   Mar 2011
日本生態学会大会講演要旨集   58th 363   Mar 2011
日本生態学会大会講演要旨集   58th 365   Mar 2011
日本生態学会大会講演要旨集   57th 318   Mar 2010
酒井 章子
Mita journal of economics   102(2) 237-250   Jul 2009
Sakai S.
Japanese Journal of Ecology   59(1) 27-28   Mar 2009
Japanese Journal of Ecology   50(1) 23-39   Apr 2000
General flowering (GF) is a phenomenon unique to lowland dipterocarp forests in Southeast Asia. During GF, which occurs at irregular intervals of 3-10 years, most dipterocarp species, together with species of other families, come heavily into flow...

Books etc

酒井 章子, Choy Yee Keong, 小泉 都, 岸本 圭子, 加藤 裕美, 高野 宏平, 祖田 亮次, 鮫島 弘光, 浅野 透, 市岡 孝朗, 市川 昌広
[s.n.]   2014   
酒井 章子, Umetsu Chieko
Springer   2014   ISBN:9784431549093
酒井 章子, Ishii Reiichiro, 山村 則男
Research Institute for Humanity and Nature   2013   ISBN:9784902325850