Effects of 50years of selective logging on demography of trees in a Malaysian lowland forest

Yamada, Toshihiro; Hosaka, Tetsurō; Okuda, Toshinori; Kassim, Abd Rahman

doi:10.1016/j.foreco.2013.08.057

Cited by 33 publications

(13 citation statements)

References 34 publications

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“…Mortality rates of dipterocarp populations were similar between the plots for all species. Community-level mortality rates were also not different between the forests (Yamada et al 2013a) concurring with the Bischoff et al (2005) study showing Bornean dipterocarp trees were also similar in mortality between primary and logged forest 13 years after selective logging. This suggests that increased mortality rates by selective logging do not last long.…”

Section: Discussionsupporting

confidence: 82%

“…This large difference in recruitment rate was also confirmed by the community level study (Yamada et al 2013a). One possible explanation for the low recruitment rate in the logged forest could be the extraction of large adult trees by the previous logging operation.…”

Section: Discussionsupporting

confidence: 63%

“…Growth, mortality and recruitment rates Fifty years after selective logging, the logged forest at Pasoh still had slightly more open canopy conditions (+0.6%) than the primary forest (Yamada et al 2014) and the increased light might have caused the faster diameter growth rates in the logged forest than in the primary forest plot at the community (130 most abundant species) level (Yamada et al 2013a). Therefore, one would also expect faster growth rates for the dipterocarp species in the logged forest plot when compared to those in the primary forest plot, but only minor differences in dbh growth rate were actually observed between the plots.…”

Section: Discussionmentioning

confidence: 99%

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Long-term effects of selective logging on dipterocarp populations in the Pasoh Forest Reserve, Malaysia

Yamada

Moriwaki

Okuda

et al. 2016

Plant Ecology & Diversity

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Background: Selective logging alters tree growth, mortality and recruitment, and the subsequent population dynamics of trees. However, little information is available on how tree populations reduce local extinction in logged forests. Aims: We evaluated the effects of selective logging on tree performance and population dynamics of five dominant dipterocarp species in the Pasoh Forest Reserve, Malaysia. Methods: We used demographic data derived from a forest that was selectively logged in 1958 as well as those from an unlogged primary forest and constructed population transition matrix models to project the population dynamics. Results: The dipterocarp species studied showed minor differences in mortality and diameter growth, but there was a large difference in recruitment between logged and unlogged forest; populations in the logged forest had 10 times slower recruitment rates into the smallest size class than those in the primary forest. Population size structures differed between the two forest types but, despite a large difference in the recruitment rates, there were only minor differences in both asymptotic-and matrix-projected population growth rates. Conclusions: A single selective logging event had only minor impacts on the growth rates of dipterocarp trees in the Pasoh forest. But at the same time it had a large impact on the size structure of the dipterocarp populations through a reduction in recruitment showing that the impacts of selective logging are still seen on dipterocarp population after 50 years.

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Section: Discussionsupporting

confidence: 82%

Section: Discussionsupporting

confidence: 63%

Section: Discussionmentioning

confidence: 99%

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Long-term effects of selective logging on dipterocarp populations in the Pasoh Forest Reserve, Malaysia

Yamada

Moriwaki

Okuda

et al. 2016

Plant Ecology & Diversity

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“…Malua was logged between 1984 and 1986 and, except our experiment site, again in 2007. The anticipated harvest cycle is 50–60 years, the estimated time needed to achieve a species composition similar to unlogged forest [25]. The Yayasan Sabah (Sabah Foundation) concession also includes the 30 000 ha Innoprise-FACE Foundation Rainforest Rehabilitation Project (INFAPRO).…”

Section: Methodsmentioning

confidence: 99%

The value of biodiversity for the functioning of tropical forests: insurance effects during the first decade of the Sabah biodiversity experiment

et al. 2016

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One of the main environmental threats in the tropics is selective logging, which has degraded large areas of forest. In southeast Asia, enrichment planting with seedlings of the dominant group of dipterocarp tree species aims to accelerate restoration of forest structure and functioning. The role of tree diversity in forest restoration is still unclear, but the ‘insurance hypothesis’ predicts that in temporally and spatially varying environments planting mixtures may stabilize functioning owing to differences in species traits and ecologies. To test for potential insurance effects, we analyse the patterns of seedling mortality and growth in monoculture and mixture plots over the first decade of the Sabah biodiversity experiment. Our results reveal the species differences required for potential insurance effects including a trade-off in which species with denser wood have lower growth rates but higher survival. This trade-off was consistent over time during the first decade, but growth and mortality varied spatially across our 500 ha experiment with species responding to changing conditions in different ways. Overall, average survival rates were extreme in monocultures than mixtures consistent with a potential insurance effect in which monocultures of poorly surviving species risk recruitment failure, whereas monocultures of species with high survival have rates of self-thinning that are potentially wasteful when seedling stocks are limited. Longer-term monitoring as species interactions strengthen will be needed to more comprehensively test to what degree mixtures of species spread risk and use limited seedling stocks more efficiently to increase diversity and restore ecosystem structure and functioning.

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“…A avaliação das taxas e processos de mortalidade e recrutamento de árvores contribui para o entendimento das perturbações decorridas por ações naturais e ou antrópicas, como apresentado em diferentes estudos em florestas tropicais (PUTZEL et al, 2011;TOLEDO, et al, 2012;YAMADA et al, 2013;DARRIGO et al, 2016). Essas taxas são indicativas da função do ecossistema (ROSSI et al, 2007a;ROSSI et al, 2007b).…”

Section: Introductionunclassified

Taxas De Recrutamento E Mortalidade De Espécies De Lecythidaceae Após Colheita Florestal Na Amazônia Oriental

Reis¹,

Reis²,

Souza³

et al. 2016

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RESUMOO monitoramento de florestas colhidas seletivamente é de grande importância para conhecer o comportamento das espécies. Entender os processos dinâmicos como o recrutamento e a mortalidade são fundamentais para prescrever tratamentos silviculturais adequados para as espécies remanescentes. O objetivo do trabalho foi avaliar o efeito da colheita seletiva de madeirais na dinâmica do recrutamento e mortalidade das espécies de Lecythidaceae. Foram avaliados nesse estudo os parâmetros recrutamento (% ano ), demonstrando que a floresta começou a se recuperar. A colheita florestal teve impacto positivo na estrutura das populações das espécies de Lecythidaceae estudadas. PALAVRAS-CHAVE: exploração de impacto reduzido, manejo florestal, matá-matá. RECRUITMENT AND MORTALITY RATES OF LECYTHIDACEAE SPECIES AFTER FOREST HARVEST IN EASTERN AMAZONABSTRACT The monitoring of forests selectively harvested is of great importance to know the behavior of the species. Understanding the dynamic processes such as recruitment

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Effects of 50years of selective logging on demography of trees in a Malaysian lowland forest

Cited by 33 publications

References 34 publications

Long-term effects of selective logging on dipterocarp populations in the Pasoh Forest Reserve, Malaysia

Long-term effects of selective logging on dipterocarp populations in the Pasoh Forest Reserve, Malaysia

The value of biodiversity for the functioning of tropical forests: insurance effects during the first decade of the Sabah biodiversity experiment

Taxas De Recrutamento E Mortalidade De Espécies De Lecythidaceae Após Colheita Florestal Na Amazônia Oriental

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