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]
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 ...
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...
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...
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 ...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
• 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...
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...
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 ...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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 ...
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. ...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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.
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...
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
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...
