Possible Negative Effect of General Flowering on Tree Growth and Aboveground Biomass Increment in a <scp>B</scp>ornean <scp>T</scp>ropical <scp>R</scp>ain <scp>F</scp>orest

Nakagawa, Michiko; Matsushita, Michinari; Kurokawa, Hiroko; Samejima, Hiromitsu; Takeuchi, Yayoi; Aiba, Masahiro; Katayama, Ayumi; Tokumoto, Yuji; Kume, Tomonori; Yoshifuji, Natsuko; Kuraji, Koichiro; Nagamasu, Hidetoshi; Sakai, Shoko; Nakashizuka, Tohru

doi:10.1111/j.1744-7429.2012.00907.x

Cited by 16 publications

(12 citation statements)

References 39 publications

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“…The phenomenon of general flowering is reported in aseasonal tropical rainforests in Asia and is likely triggered by unexpected droughts in Lambir (Sakai et al, 2006). Strong temporal variation in net primary production was also reported in a study in Lambir that included a period of general flowering (Kho et al, 2013), and annual aboveground biomass increments decreased in the year of general flowering, whereas litterfall of flowers and seeds significantly increased (Nakagawa et al, 2012). These studies indicate that general flowering follows dynamic temporal variation in net primary production and R wood , reflecting increased carbon allocation to the canopy for reproductive organs during general flowering.…”

Section: Measured Valuementioning

confidence: 71%

“…Moreover, the lowest ecosystem-R wood was observed during a severe drought in June 2013, and was followed by "general flowering," with masting at the community level at irregular intervals of one to several years (Sakai et al, 2006;Nakagawa et al, 2012). The phenomenon of general flowering is reported in aseasonal tropical rainforests in Asia and is likely triggered by unexpected droughts in Lambir (Sakai et al, 2006).…”

Section: Measured Valuementioning

confidence: 97%

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Characteristics of wood CO2 efflux in a Bornean tropical rainforest

Katayama

Kume

Ohashi

et al. 2016

Agricultural and Forest Meteorology

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Section: Measured Valuementioning

confidence: 71%

Section: Measured Valuementioning

confidence: 97%

Characteristics of wood CO2 efflux in a Bornean tropical rainforest

Katayama

Kume

Ohashi

et al. 2016

Agricultural and Forest Meteorology

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“…In the CBP and CP, tree censuses have been conducted every 4 years and annually, respectively, for trees over 30 cm in girth at breast height (GBH) (Nakagawa et al . ).…”

Section: Methodsmentioning

confidence: 97%

“…In 2000, a crane plot (CP) covering 4 ha (200 ¥ 200 m) and a canopy crane were constructed for the observation of GF events, and the carbon and water budgets of the forest. In the CBP and CP, tree censuses have been conducted every 4 years and annually, respectively, for trees over 30 cm in girth at breast height (GBH) (Nakagawa et al 2012).…”

Section: Research Sitesmentioning

confidence: 99%

Assemblage of flower visitors to Dillenia suffruticosa and possible negative effects of disturbances in Sarawak, Malaysia

Tokumoto

Itioka

Ohkubo

et al. 2013

Entomological Science

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Dillenia suffruticosa (Dilleniaceae), a common pioneer shrub in Southeast Asia, is broadly distributed along roadsides. This species flowers throughout the year and is thought to be a keystone species for maintaining populations of flower visitors. To examine the flower visitors of this species, we conducted field surveys and described the behaviors of each flower visitor species within four different research sites: Primary Forests 1 and 2, Secondary Forest, and Mixed Vegetation. We caught 1087 individuals belonging to 51 species from 11 insect families and one species of arachnid. Most flower visitors belonged to Hymenoptera (98.6% of individuals); Trigona spp. and Xylocopa spp. (Apidae) accounted for 64.0% and 20.0%, respectively, of all caught individuals. According to observations of behavior by each species, effective pollinators may include Xylocopa spp. and Amegilla spp. (Apidae). We compared the research results among four research sites and found that the effective pollinators were not different among sites. However, the number of species and the abundances of flower visitors decreased in disturbed areas, especially in Secondary Forest. This research suggests the effects of human disturbances on the diversity and abundance of flower visitors.

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“…At the species level, a small fraction flowered and fruited twice during the CM period, but very few did so at the level of individual trees. The last CM event before the studied CM event was in 2009 (Nakagawa et al 2012).…”

Section: Plant Reproductive Phenologymentioning

confidence: 99%

Increased seed predation in the second fruiting event during an exceptionally long period of community‐level masting in Borneo

Iku

Itioka

Kishimoto‐Yamada

et al. 2017

Ecological Research

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In Southeast Asian tropical rainforests, community‐level masting (CM) occurs at irregular intervals of 2–10 years. During CM periods, many plant species from various families synchronously flower and subsequently undergo community‐level fruiting. Seed predation is a key factor in understanding the ecological and evolutionary factors affecting CM. Masting is proposed to decrease seed mortality due to predation in two ways: by depressing predator abundance through extended and unpredictable absences of seeds; and by satiating predators via mass seed production (predator satiation hypothesis). If the hypothesis is valid in these rainforests, the incidence of seed predation will be higher in a fruiting event that occurs soon after a previous fruiting event, because the intervening period of seed absence would be inadequate to starve the predators. In this study, we examined seed predation by insects, focusing on five dipterocarp species that exceptionally reproduced twice during an extended CM period. All of the five species suffered more intense seed predation in the second fruiting event, consistent with the prediction expected from the predator satiation hypothesis. Weevils, bark beetles and mammals were the main cause of increased seed predation in three, one and one plant species, respectively. However, seed predation intensity did not increase during the second fruiting event in a few combinations of predator and plant species. We discuss the possibility that competition for seeds among predators and/or the interspecific differences in life history traits among predators might affect the varying intensities of seed predation among dipterocarp species by different seed predators.

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Possible Negative Effect of General Flowering on Tree Growth and Aboveground Biomass Increment in a Bornean Tropical Rain Forest

Cited by 16 publications

References 39 publications

Characteristics of wood CO2 efflux in a Bornean tropical rainforest

Characteristics of wood CO2 efflux in a Bornean tropical rainforest

Assemblage of flower visitors to Dillenia suffruticosa and possible negative effects of disturbances in Sarawak, Malaysia

Increased seed predation in the second fruiting event during an exceptionally long period of community‐level masting in Borneo

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