Habitats suitable for the establishment of <i>Shorea curtisii</i> seedlings in a hill forest in Peninsular Malaysia

Yagihashi, Tsutomu; Otani, Toshio; Tani, Naoki; Nakaya, Tomoki; Rahman, K. Abd; Matsui, Tetsuya; Tanaka, Hiroyuki

doi:10.1017/s026646741000026x

Cited by 5 publications

(4 citation statements)

References 9 publications

(12 reference statements)

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“…Seedlings of S. curtisii had the advantage of higher survival at sites with a higher content of sand and lower soil moisture, which suggests a preference for habitats with dry, nutrient-poor soil. This is supported by previous studies, which found that S. curtisii trees are abundant on ridge crests (Whitmore 1984) and that those 30-130 cm tall can withstand water stress and nutrient shortages (Yagihashi et al 2010). However, no clear trends appear to exist in the effects of soil environmental heterogeneity on seedling survival and seedling morphological traits.…”

Section: Variation In Abiotic and Biotic Drivers Among Dipterocarp Spsupporting

confidence: 72%

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Biotic and abiotic drivers of dipterocarp seedling survival following mast fruiting in Malaysian Borneo

2014

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Abstract:South-East Asian tropical rain forests experience sporadic, but profuse, seed production after general flowering, leading to the synchronous emergence of various seedlings and subsequent seedling dynamics, which play a crucial role in determining species distribution and coexistence. We examined the relative importance of both biotic (initial height, conspecific seedling density) and abiotic (canopy openness, per cent sand, soil water content) drivers using survival data for 1842 seedlings of 12 dipterocarp species for 1.5 y following mast fruiting in an old-growth Bornean tropical rain forest. More than 30% of all dipterocarp seedlings survived 1.5 y after mast fruiting. When all species were analysed together, we found that initial seedling height, canopy openness and conspecific seedling density affected dipterocarp seedling survival. Negative density dependence indicated that predators were not satiated, but dipterocarp seedlings rather suffered from host-specific natural enemies or intraspecific competition. Species-level analyses of seven dipterocarp species showed large variation in response to biotic and abiotic factors. These results suggest that interspecific differences in the relative importance of biotic and abiotic effects on seedling survival might contribute to species coexistence.

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Section: Variation In Abiotic and Biotic Drivers Among Dipterocarp Spsupporting

confidence: 72%

“…curtisii trees are abundant on ridge crests (Whitmore 1984) and that those 30–130 cm tall can withstand water stress and nutrient shortages (Yagihashi et al . 2010). However, no clear trends appear to exist in the effects of soil environmental heterogeneity on seedling survival and seedling morphological traits.…”

Section: Discussionmentioning

confidence: 99%

Biotic and abiotic drivers of dipterocarp seedling survival following mast fruiting in Malaysian Borneo

2014

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“…The permission to conduct this research in the forest reserve was granted by the Selangor State Forest Department. The forest reserve consists of a 6-ha (200 m × 300 m) hill dipterocarp forest conservation plot, and another 5.4-ha (140 m × 400 m) plot established on a selectively logged area ( Tani et al, 2015 ; Yagihashi et al, 2010 ). Daily temperature and precipitation data were collected from Hospital Kuala Kubu Bharu meteorological station and Kampung Pertak hydrological station, respectively ( Fig.…”

Section: Methodsmentioning

confidence: 99%

An ecological transcriptome approach to capture the molecular and physiological mechanisms of mass flowering in Shorea curtisii

Suhaimi,

Kobayashi,

Satake

et al. 2023

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Climatic factors have commonly been attributed as the trigger of general flowering, a unique community-level mass flowering phenomenon involving most dipterocarp species that forms the foundation of Southeast Asian tropical rainforests. This intriguing flowering event is often succeeded by mast fruiting, which provides a temporary yet substantial burst of food resources for animals, particularly frugivores. However, the physiological mechanism that triggers general flowering, particularly in dipterocarp species, is not well understood largely due to its irregular and unpredictable occurrences in the tall and dense forests. To shed light on this mechanism, we employed ecological transcriptomic analyses on an RNA-seq dataset of a general flowering species, Shorea curtisii (Dipterocarpaceae), sequenced from leaves and buds collected at multiple vegetative and flowering phenological stages. We assembled 64,219 unigenes from the transcriptome of which 1,730 and 3,559 were differentially expressed in the leaf and the bud, respectively. Differentially expressed unigene clusters were found to be enriched with homologs of Arabidopsis thaliana genes associated with response to biotic and abiotic stresses, nutrient level, and hormonal treatments. When combined with rainfall data, our transcriptome data reveals that the trees were responding to a brief period of drought prior to the elevated expression of key floral promoters and followed by differential expression of unigenes that indicates physiological changes associated with the transition from vegetative to reproductive stages. Our study is timely for a representative general flowering dipterocarp species that occurs in forests that are under the constant threat of deforestation and climate change as it pinpoints important climate sensitive and flowering-related homologs and offers a glimpse into the cascade of gene expression before and after the onset of floral initiation.

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“…4-ha (100 m × 400 m) permanent plot was established within a selectively logged area of forest in 1994 and was extended to about 5.4-ha (ca. 140 m × 400 m) in 2007 [ 37 ]. All trees in both plots with a diameter at breast height (dbh) greater than 5 cm were tagged.…”

Section: Methodsmentioning

confidence: 99%

Mixed Mating System Are Regulated by Fecundity in Shorea curtisii (Dipterocarpaceae) as Revealed by Comparison under Different Pollen Limited Conditions

et al. 2015

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The maintenance of mixed mating was studied in Shorea curtisii, a dominant and widely distributed dipterocarp species in Southeast Asia. Paternity and hierarchical Bayesian analyses were used to estimate the parameters of pollen dispersal kernel, male fecundity and self-pollen affinity. We hypothesized that partial self incompatibility and/or inbreeding depression reduce the number of selfed seeds if the mother trees receive sufficient pollen, whereas reproductive assurance increases the numbers of selfed seeds under low amounts of pollen. Comparison of estimated parameters of self-pollen affinity between high density undisturbed and low density selectively logged forests indicated that self-pollen was selectively excluded from mating in the former, probably due to partial self incompatibility or inbreeding depression until seed maturation. By estimating the self-pollen affinity of each mother tree in both forests, mother trees with higher amount of self-pollen indicated significance of self-pollen affinity with negative estimated value. The exclusion of self-fertilization and/or inbreeding depression during seed maturation occurred in the mother trees with large female fecundity, whereas reproductive assurance increased self-fertilization in the mother trees with lower female fecundity.

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Habitats suitable for the establishment of Shorea curtisii seedlings in a hill forest in Peninsular Malaysia

Cited by 5 publications

References 9 publications

Biotic and abiotic drivers of dipterocarp seedling survival following mast fruiting in Malaysian Borneo

Biotic and abiotic drivers of dipterocarp seedling survival following mast fruiting in Malaysian Borneo

An ecological transcriptome approach to capture the molecular and physiological mechanisms of mass flowering in Shorea curtisii

Mixed Mating System Are Regulated by Fecundity in Shorea curtisii (Dipterocarpaceae) as Revealed by Comparison under Different Pollen Limited Conditions

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