Prolific fruit output by the invasive tree <i>Bellucia pentamera</i> Naudin (Melastomataceae) is enhanced by selective logging disturbance

Dillis, Christopher; Marshall, Andrew J.; Webb, Campbell O.; Grote, Mark N.

doi:10.1111/btp.12545

Cited by 11 publications

(9 citation statements)

References 42 publications

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“…The presence of invasive B . pentamera at the LEWS site has potential to disrupt traditional practices for maintaining forest diversity (Dillis et al, 2018). Previously, cleared forests would regenerate from seeds from surrounding pulau , maintained on hilltops in part so surrounding slopes could receive seeds washed down with the rains, or carried by animals (Choy, 2014; Takeuchi et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Fruit tree phenology in traditionally managed versus protected forests in Malaysian Borneo

et al. 2022

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Community‐managed forests (CF) bordering protected areas are critical to conservation in Borneo. Iban‐managed CF retain tree species characteristic of primary forests within pulau, remnant old growth forests conserved for harvesting forest products. However, the selective felling of large trees, and proximity to surrounding mixed‐use mosaic habitat, likely influence pulau structure and composition. Tropical Asian forests exhibit supra‐annual mast fruiting (3–7 years) and extended periods of fruit scarcity, but fruit trees encouraged and planted by communities, in mixed‐use mosaic bordering pulau, may benefit wildlife during periods of fruit scarcity. We investigated seasonal availability of foods important to wildlife within protected primary forest and pulau at the boundary of the Lanjak Entimau Wildlife Sanctuary (LEWS), in Sarawak, Malaysia. We tracked the presence of fruits and seeds, comparing relative composition and fruiting activity between forests, using bi‐monthly phenology surveys across 50 locations (October 2016–2019). We also compared fruit presence along walking transects within LEWS’s primary forest and the mixed‐use mosaic in Iban territories. We found forests within and adjacent to LEWS shared similar composition, synchrony, and extended periods of fruit scarcity. Mixed‐use mosaic bordering pulau provided more consistent fruits, however, due largely to an invasive tree (Bellucia pentamera). Our study suggests pulau retain diversity and synchrony of fruit resources comparable to primary forest, sustaining valuable habitat for wildlife within the greater mixed‐use mosaic of traditional Iban land management practices. These findings are important for understanding resources available to wildlife outside of protected areas, and how CF contribute to conserving biodiversity.

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Section: Discussionmentioning

confidence: 99%

Fruit tree phenology in traditionally managed versus protected forests in Malaysian Borneo

et al. 2022

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“…(Euphorbiaceae) and the invasive pioneer Bellucia pentamera (Melastomataceae) from South America (de Kok et al, 2015). These species are common in across the entire landscape and within disturbed forest more generally in Southeast Asia (Slik et al, , 2008Dillis et al, 2018). The study area also included oil palm within the adjacent concession.…”

Section: Data Collection Study Sitementioning

confidence: 99%

Monitoring early-successional trees for tropical forest restoration using low-cost UAV-based species classification

Williams

Jackson

Schönlieb

et al. 2022

Front. For. Glob. Change

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Logged forests cover four million square kilometers of the tropics, capturing carbon more rapidly than temperate forests and harboring rich biodiversity. Restoring these forests is essential to help avoid the worst impacts of climate change. Yet monitoring tropical forest recovery is challenging. We track the abundance of early-successional species in a forest restoration concession in Indonesia. If the species are carefully chosen, they can be used as an indicator of restoration progress. We present SLIC-UAV, a new pipeline for processing Unoccupied Aerial Vehicle (UAV) imagery using simple linear iterative clustering (SLIC)to map early-successional species in tropical forests. The pipeline comprises: (a) a field verified approach for manually labeling species; (b) automatic segmentation of imagery into “superpixels” and (c) machine learning classification of species based on both spectral and textural features. Creating superpixels massively reduces the dataset's dimensionality and enables the use of textural features, which improve classification accuracy. In addition, this approach is flexible with regards to the spatial distribution of training data. This allowed us to be flexible in the field and collect high-quality training data with the help of local experts. The accuracy ranged from 74.3% for a four-species classification task to 91.7% when focusing only on the key early-succesional species. We then extended these models across 100 hectares of forest, mapping species dominance and forest condition across the entire restoration project.

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“…Understanding terrestrial frugivore and seed predator involvement in asynchronous and synchronous masting not only sheds light on their feeding ecology, but may inform conservationists as to the resiliency of Borneo's forest community in the face of continued anthropogenic disturbance. Concern is growing over the invasive pioneer tree, Bellucia pentamera, in Borneo's forest due to its hyper-productive and highfrequency fruiting (Dillis et al, 2018). If high frequency, asynchronous fruiting does prove to be an attractive trait for terrestrial frugivores, B. pentamera may find no shortage of seed-dispersers willing to encourage its spread through Borneo, perhaps even to the detriment of other endozoochorous species.…”

Section: Natural History Of Masting In Borneomentioning

confidence: 99%

The impacts of camera placement on species detectability in an Indonesian terrestrial community

Dam¹

2021

Preprint

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<p>Ecologists have increasingly favoured the use of camera traps in studies of animal populations and their behaviour. Because camera trap study design commonly implements non-random selective placement, we must consider how this placement strategy affects the integrity of our data collection. Selective placement of camera traps have the benefits of 1) maximizing the probability of encounter events by sampling habitats or microhabitats of known significance to a focus or closely-related species and 2) reducing data collection and maintenance effort in the field by situating cameras along more easily-accessible landscape features. Introducing a non-random survey method, such as selective placement, into a project studying a species or community that also expresses non-random habitat use may lead to unintentionally biased data and inaccurate results. By using a paired on-trail/off-trail camera-trap study design, my aim is to investigate potential differences in popular ecological indices, species detection probability (p) using multi-method occupancy models, and intraspecific temporal activity for a terrestrial community in Gunung Palung National Park in Indonesian Borneo. Differences in detection probability between on and off-trail cameras were compared against species characteristics (including body size, diet, and taxonomic group) to find potential correlations. While several species exhibited a significant difference in detection probability between cameras placed on foot trails and those placed randomly off-trail, there was no measured community trend. This stresses my conclusion further that a non-random study design leaves results open to bias from unknown patterns in detection due to underlying variation in behaviour and microhabitat use. Selective placement may be effective for increasing detection probability for some species but can also lead to substantial bias if the features selected for are not explicitly taken into account within the analysis or balanced with a control in the study design. In addition, a positive interactive effect was found between on trail species detection and body size for the terrestrial omnivore guild, and three species presented significant variation in temporal activity between camera placement types. This provides evidence that camera placement not only affects species state parameters and indices but has a noticeable impact on behavioural observations that require accountability as well.</p>

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Prolific fruit output by the invasive tree Bellucia pentamera Naudin (Melastomataceae) is enhanced by selective logging disturbance

Cited by 11 publications

References 42 publications

Fruit tree phenology in traditionally managed versus protected forests in Malaysian Borneo

Fruit tree phenology in traditionally managed versus protected forests in Malaysian Borneo

Monitoring early-successional trees for tropical forest restoration using low-cost UAV-based species classification

The impacts of camera placement on species detectability in an Indonesian terrestrial community

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