Assessing tree species diversity and structure of mixed dipterocarp forest remnants in a fragmented landscape of north-western Borneo, Sarawak, Malaysia

Ganivet, Elias; Unggang, Joanes; Bodos, Vilma; Demies, Malcom; Ling, Chea Yiing; Sang, Julia; Bloomberg, Mark

doi:10.1016/j.ecolind.2020.106117

Cited by 8 publications

(6 citation statements)

References 68 publications

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“…It should be noted that the Mantel test showed a significant correlation between geographic distance and dissimilarity of community composition. This distance decay of similarity is commonly reported in tropical forests (Ganivet et al 2020, Liebsch et al 2008, Wittmann et al 2006. Pre-existing spatial variation seems to confound with the main treatment (logging), but the correlation is rather weak.…”

Section: Limitationssupporting

confidence: 62%

The association between rainforest disturbance and recovery, tree community composition, and community traits in the Yangambi area in the Democratic Republic of the Congo

et al. 2022

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Despite their key role in biodiversity conservation, forests in the Congo Basin are increasingly threatened by human activities, but it remains challenging to assess the impact of forest degradation under a more or less intact canopy. Likewise, forest recovery following agricultural abandonment remains poorly understood in the Congo Basin. Here, we surveyed 125 vegetation quadrats across 25 forest inventory plots in the Yangambi area. We aimed to find associations between both selective logging and forest recovery, and a range of forest community and tree community trait characteristics, as compared to reference undisturbed old-growth forest. We found that plots in undisturbed old-growth forest harboured both more tree individuals and tree species with a higher wood density as compared to plots in disturbed old-growth forest. In addition, their tree community composition was significantly different, whereas species diversity recovered since relatively recent agricultural abandonment (< 60 years), community composition and forest structure remained significantly different from the plots in undisturbed old-growth forest. Our study provides some insights into the rate of forest recovery in the Congo basin after agricultural abandonment and highlights the need of proper conservation of the remaining relatively undisturbed old-growth forests. Finally, we stress the need for more extensive vegetation surveys in the Congo Basin to further unravel the effects of anthropogenic disturbance.

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Section: Limitationssupporting

confidence: 62%

The association between rainforest disturbance and recovery, tree community composition, and community traits in the Yangambi area in the Democratic Republic of the Congo

et al. 2022

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“…Genus‐level data are also commonly used in studies of disturbance‐driven floristic changes (Laurance et al, 2006; Michalski et al, 2007; Slik et al, 2008). Furthermore, patterns of floristic richness and composition are highly correlated between taxonomic levels in Borneo forests, making fragmentation and disturbance effects detectable at multiple taxonomic resolutions (Ganivet et al, 2020; Imai et al, 2014; Stride et al, 2018), and wood density is a highly taxonomically‐conserved trait, with 72.5% of species‐level variation explained at the genus‐level (Slik, 2006). Our analyses of taxonomic and functional composition and diversity are therefore robust to genus‐level information.…”

Section: Methodsmentioning

confidence: 99%

Weak edge effects on trees in Bornean rainforest remnants bordering oil palm

et al. 2022

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Agricultural expansion has caused widespread loss of tropical rainforests, which support an outstanding diversity of species and provide valuable ecosystem services (Lewis et al., 2015). This expansion is predicted to continue in the coming decades to provide food and resources for a growing human population (Laurance et al., 2014).Deforestation for agriculture causes a reduction in forest area and increased fragmentation of remaining forest, with consequences for biodiversity and key ecosystem functions such as carbon storage

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“…Each species has physiological, anatomical, and phenological characteristics that affect the interactions and associations with other species (Pavón et al 2000;Zhu et al 2015a;Crausbay and Martin 2016). For example, the lifespan of species affects the community formed (Zuidema et al 2013;Jiang et al 2015;Ganivet et al 2020), and the seed characteristics determine the distribution of species during the dispersal which often involves animals (Naniwadekar et al 2015;Finnegan et al 2019). However, in this research, the ecological conditions of each location, which differs in elevation, is likely the driving factors that form tree community.…”

Section: Tree Communities As Species Interactionsmentioning

confidence: 91%

Species diversity, composition, and heterospecific associations of trees in three altitudinal gradients in Bird's Head Peninsula, Papua, Indonesia

et al. 2020

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Abstract. Fatem SM, Djitmau DA, Ungirwalu A, Wanma AO, Simbiak VI, Benu NMH, Tambing J, Murdjoko A. 2020. Species diversity, composition, and heterospecific associations of trees in three altitudinal gradients in Bird's Head Peninsula, Papua, Indonesia. Biodiversitas 21: 3596-3605. The region of Bird's Head Peninsula, West Papua, Indonesia has a high level of vegetation diversity distributed from coastal to mountain areas. Yet, the information regarding this diversity is limited. We studied species diversity, composition, and heterospecific association of trees in three altitudinal gradients in Bird's Head Peninsula to reveal the biotic phenomenon in the region. Systematic random sampling was applied during data collection in three locations representing lower, middle, and upper altitudes of natural tropical forest. We applied diversity indices to investigate taxonomic diversity, importance value index (IVI) to reveal floristic composition and canonical correspondence analysis (CCA) for heterospecific associations. In total, we recorded 30 families, 44 genera, and 66 species in the three locations. There were 20 families in lower area and each 15 families in middle and upper areas while the genera per site were 29 in lower, 20 in the middle, and 18 in the upper. The number of species found in lower, middle, and upper areas was 35 species, 24 species, and 27 species respectively. The research revealed that the taxonomic diversity of trees generally decreases as the elevation increases in terms of family, genera, and species level. The dominant species was also different across elevation gradients in which the dominant tree had a different pattern in the three locations between understory and upperstory. Moreover, the gradient of elevation has shaped the type of tree communities, suggesting interactions and associations among tree species. Of all species recorded, 26 species were listed in IUCN Red List with two species were under data deficient, 20 species were least concern, three species were near threatened, and one species was vulnerable.

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Assessing tree species diversity and structure of mixed dipterocarp forest remnants in a fragmented landscape of north-western Borneo, Sarawak, Malaysia

Cited by 8 publications

References 68 publications

The association between rainforest disturbance and recovery, tree community composition, and community traits in the Yangambi area in the Democratic Republic of the Congo

The association between rainforest disturbance and recovery, tree community composition, and community traits in the Yangambi area in the Democratic Republic of the Congo

Weak edge effects on trees in Bornean rainforest remnants bordering oil palm

Species diversity, composition, and heterospecific associations of trees in three altitudinal gradients in Bird's Head Peninsula, Papua, Indonesia

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