Citizen science rapidly delivers extensive distribution data for birds in a key tropical biodiversity area

Squires, Tom; Yuda, Pramana; Akbar, Panji Gusti; Collar, Nigel; Devenish, Christian; Taufiqurrahman, Imam; Wibowo, Waskito Kukuh; Winarni, Nurul L.; Yanuar, Ahmad; Marsden, Stuart J.

doi:10.1016/j.gecco.2021.e01680

Cited by 13 publications

(13 citation statements)

References 46 publications

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“…2021) and was recorded only three times in over 20,000 bird lists in a month-long citizen science event in Java and Bali (Squires et al . 2021). This species, about to be recognised as Critically Endangered (BirdLife International pers.…”

Section: Discussionmentioning

confidence: 99%

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Distribution and abundance of threatened and heavily traded birds in the mountains of western Java

Marsden,

Junaid,

Kaprawi

et al. 2023

Bird Conservation International

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Summary There is serious concern for the future of a wide range of birds in Java and elsewhere in Indonesia due to both loss of habitat and trapping for the cagebird trade (the so-called “Asian Songbird Crisis”). Despite this concern, few data on presence and abundance of key species exist. We provide such data on 184 bird species from over two years of biodiversity surveys from 37 sites on 12 mountains in West and Central Java. Many of these species are heavily traded, endemic, and globally threatened. Several of the threatened endemics, notably Javan Trogon and Javan Cochoa, were often recorded, in terms of both geographical spread and numerical abundance. Rufous-fronted Laughingthrush, Spotted Crocias, and Orange-spotted Bulbul, believed to be threatened by trapping for the songbird trade, appear to remain fairly widespread. By contrast, Brown-cheeked Bulbul, Chestnut-backed (Javan) Scimitar-babbler, Javan Oriole, and especially Javan Blue-flycatcher, recorded on just a single occasion, and Javan Green Magpie, which we failed to record with certainty, now appear to be extremely rare. Our encounter rates, while not pinned to specific mountains for security reasons, represent an important baseline against which future changes in abundance can be gauged.

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Section: Discussionmentioning

confidence: 99%

“…This knowledge gap is slowly being filled in Java’s lowlands by initiatives such as the BigMonth2020 citizen science event and the Indonesian bird atlas (Squires et al . 2021), and targeted repeat surveys of individual species (van Balen et al . 2022).…”

Section: Introductionmentioning

confidence: 99%

Distribution and abundance of threatened and heavily traded birds in the mountains of western Java

Marsden,

Junaid,

Kaprawi

et al. 2023

Bird Conservation International

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“…By contrast, recent studies and records have suggested that the species is not commonly kept in captivity (Marshall et al . 2020) and remains frequently observed and widespread in the wild (Squires et al . 2021, eBird 2022).…”

Section: Discussionmentioning

confidence: 99%

Subspeciation in the Ruby-throated Bulbul Rubigula dispar

Berryman

Collar

2023

Bulletin of the British Ornithologists’ Club

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“…For example, Ramesh et al [225] used eBird data to explore drivers of bird occupancy in the mountainous Western Ghats of India. Biogeographic gaps could be filled by citizen science data where funding or research opportunities are lacking [226,227]. Citizen scientists primed with the right knowledge could also make more informed observations, such as including breeding codes on checklists.…”

Section: Plos Climatementioning

confidence: 99%

Building a mechanistic understanding of climate-driven elevational shifts in birds

Neate‐Clegg

Tingley²

2023

PLOS Clim

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Mountains hold much of the world’s taxonomic diversity, but global climate change threatens this diversity by altering the distributions of montane species. While numerous studies have documented upslope shifts in elevational ranges, these patterns are highly variable across geographic regions and taxa. This variation in how species’ range shifts are manifesting along elevational gradients likely reflects the diversity of mechanisms that determines elevational ranges and modulates movements, and stands in contrast to latitudinal gradients, where range shifts show less variability and appear more predictable. Here, we review observed elevational range shifts in a single taxonomic group–birds–a group that has received substantial research attention and thus provides a useful context for exploring variability in range shifts while controlling for the mechanisms that drive range shifts across broader taxonomic groups. We then explore the abiotic and biotic factors that are known to define elevational ranges, as well as the constraints that may prevent birds from shifting. Across the literature, temperature is generally invoked as the prime driver of range shifts while the role of precipitation is more neglected. However, temperature is less likely to act directly on elevational ranges, instead mediating biotic factors such as habitat and food availability, predator activity, and parasite prevalence, which could in turn modulate range shifts. Dispersal ability places an intrinsic constraint on elevational range shifts, exacerbated by habitat fragmentation. While current research provides strong evidence for the importance of various drivers of elevational ranges and shifts, testing the relative importance of these factors and achieving a more holistic view of elevational gradients will require integration of expanding datasets, novel technologies, and innovative techniques.

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Citizen science rapidly delivers extensive distribution data for birds in a key tropical biodiversity area

Cited by 13 publications

References 46 publications

Distribution and abundance of threatened and heavily traded birds in the mountains of western Java

Distribution and abundance of threatened and heavily traded birds in the mountains of western Java

Subspeciation in the Ruby-throated Bulbul Rubigula dispar

Building a mechanistic understanding of climate-driven elevational shifts in birds

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