Habitat structure affects nest predation of the Scaly-crowned Babbler (Malacopteron cinereum) by macaques and snakes in a Thai-seasonal evergreen forest

Somsiri, Kanoktip; Gale, George; Pierce, Andrew J.; Khamcha, Daphawan; Sankamethawee, Wangworn

doi:10.1007/s10336-019-01724-0

Cited by 13 publications

(6 citation statements)

References 39 publications

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“…Khamcha and Gale (2020) report B. cyanea being responsible for ≈27% of predations by top-five predators on WRSH, ≈25% on ABBA, and ≈19% on SCBA. The average nest height for WRSH is around 1.6 m (Khamcha and Gale, 2020), that for ABBA is 0.7 m (Khamcha and Gale, 2020), and that for SCBA is 0.98 m (Somsiri et al, 2020) –similar to the median movement height (1.5 m; IQR: 3.5) recorded for our B. cyanea . Boiga cyanea might forage closer to the ground, especially during the avian nesting season, to actively hunt for ground and understory nesting bird nests.…”

Section: Discussionsupporting

confidence: 74%

“…To explore the relationship between avian nest depredation and B. cyanea movement, we were granted access to nest predation records documented at the Sakaerat Biosphere Reserve by researchers from King Mongkut’s University of Technology Thonburi (KMUTT), Thailand. The nest predation data were collected within a 36-ha, permanent, nest monitoring plot in the dry evergreen forest (Khamcha et al, 2018; Khamcha and Gale, 2020; Somsiri et al, 2020) via continuous-recording video systems adapted from Pierce and Pobprasert (2007). The video systems were active throughout the nesting seasons between 2013 and 2019, monitoring 12 species of forest birds’ nests.…”

Section: Methodsmentioning

confidence: 99%

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Arboreal aperitifs: Space use and activity of a major songbird nest predator in a tropical Thailand forest

D'souza¹,

Marshall²,

Strine³

2021

Preprint

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Predator-prey interactions are fundamental drivers of population dynamics, yet rarely are both predator and prey species simultaneously studied. Despite being significant, widespread avian nest predators, research on the ecology of Southeast Asian snakes in relation to birds remains scarce. The green cat snake (Boiga cyanea) is a primary nest predator, responsible for ≈24% of forest songbird depredation in Northeast Thailand. We explored both diurnal and nocturnal movements of 14 (5 male, 9 female) adult B. cyanea with radio-telemetry for an average of 68 ± 16 days per individual, between 21 October 2017 and 8 June 2019 in the dry evergreen forest of the Sakaerat Biosphere Reserve (SBR). We quantified area of space use (ha) and activity through motion variance (σm2) during the study period using dynamic Brownian bridge movement models, and linked our findings to a simultaneously-run avian nest monitoring study, initiated in 2013 within the same forest fragment. On average, movements, space use and activity differed between males and females, and between the avian nesting and non-nesting seasons. Males moved 51.37 m/day farther than females. They used areas 15.09 ha larger than females, and their activity was 3.91 σm2 higher than that of females. In general, individuals moved 50.30 m/day farther during the nesting season than the non-nesting season. The snakes used areas 9.84 ha larger during the nesting season than the non-nesting season, and their activity during the nesting season was 3.24 σm2 higher than that during the non-nesting season. All individuals were exclusively nocturnal, moving throughout the night, and often descending from higher diurnal refugia (>2 m) to forage closer to the ground after sunset. Boiga cyanea activity followed a similar trend to that of the recorded nest depredations at SBR. Our study links snake activity to nest depredations in SBR. Our openly-available data may yield further insight when combined with other major avian nest predator species like the congeneric invasive brown tree snake (Boiga irregularis) on the island of Guam.

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Section: Discussionsupporting

confidence: 74%

Section: Methodsmentioning

confidence: 99%

Arboreal aperitifs: Space use and activity of a major songbird nest predator in a tropical Thailand forest

D'souza¹,

Marshall²,

Strine³

2021

Preprint

Self Cite

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“…Large forest openings and less dense canopy cover may affect the risk of predation in birds (Hua & Sieving, 2016; Williamson & Fagan, 2017). For example, scaly‐crowned babbler Malacopteron cinereum , one of our study species is a more likely victim of nest‐predation by pig‐tailed macaques Macaca leonina when their nest is surrounded by saplings and a lower density of tall trees (Somsiri, Gale, Pierce, Khamcha, & Sankamethawee, 2019). Such environmental conditions can be found in selectively logged forests, where the abundance of pig‐tailed macaques is similar to that in primary forest (Granados, Crowther, Brodie, & Bernard, 2016).…”

Section: Discussionmentioning

confidence: 99%

Impacts of selective logging on the oxidative status of tropical understorey birds

Messina

Edwards

AbdElgawad

et al. 2020

Journal of Animal Ecology

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1. Selective logging is the dominant form of human disturbance in tropical forests, driving changes in the abundance of vertebrate and invertebrate populations relative to undisturbed old-growth forests. 2. A key unresolved question is understanding which physiological mechanisms underlie different responses of species and functional groups to selective logging. Regulation of oxidative status is thought to be one major physiological mechanism underlying the capability of species to cope with environmental changes. 3. Using a correlational cross-sectional approach, we compared a number of oxidative status markers among 15 understorey bird species in unlogged and selectively logged forest in Borneo in relation to their feeding guild. We then tested how variation of markers between forest types was associated with that in population abundance. 4. Birds living in logged forests had a higher activity of the antioxidant enzyme superoxide dismutase and a different regulation of the glutathione cycle compared to conspecific birds in unlogged forest. However, neither oxidative damage nor oxidized glutathione differed between forest types. We also found that omnivores and insectivores differed significantly in all markers related to the key cellular antioxidant glutathione irrespective of the forest type. Species with higher levels of certain antioxidant markers in a given type of forest were less abundant in that forest type compared to the other. 5. Our results suggest that there was little long-term effect of logging (last logging rotation occurred ~15 years prior to the study) on the oxidative status of understorey bird species. However, it is unclear if this was owing to plasticity or evolutionary change. Our correlative results also point to a potential negative association between some antioxidants and population abundance irrespective of the forest type.

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“…However, if that is the reason why they chose acacias, then it is puzzling that both the flycatcher and the oriole shifted to use other tree species in rural and urban habitats. We suggest that the important arboreal predators in the forest tend to be absent around anthropic areas, because predators vary by habitat (Somsiri et al, 2020;Zuñiga-Palacios et al, 2021).…”

Section: Discussionmentioning

confidence: 92%

Three neotropical bird species shift nest‐site preferences from swollen‐thorn acacias to other sites in human‐altered habitats

Amador-Vargas

Porras‐Brenes

2022

Biotropica

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Nesting is a crucial and vulnerable stage in egg-laying animals.Predation can account for 42-93% of bird nest failures in the tropics (Robinson & Robinson, 2001). Nest material and nest-site selection are important for nesting success, along with behaviors to deter, avoid or confuse predators (Martin & Briskie, 2009). Hence, the selection process should integrate information regarding the available nesting sites and materials and predation risk. Predation of bird nests in the neotropics is mainly caused by monkeys, snakes,

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Habitat structure affects nest predation of the Scaly-crowned Babbler (Malacopteron cinereum) by macaques and snakes in a Thai-seasonal evergreen forest

Cited by 13 publications

References 39 publications

Arboreal aperitifs: Space use and activity of a major songbird nest predator in a tropical Thailand forest

Arboreal aperitifs: Space use and activity of a major songbird nest predator in a tropical Thailand forest

Impacts of selective logging on the oxidative status of tropical understorey birds

Three neotropical bird species shift nest‐site preferences from swollen‐thorn acacias to other sites in human‐altered habitats

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