Reproductive differences between urban and forest birds across the years: importance of environmental and weather parameters

Saulnier, Agnès; Bleu, Josefa; Boos, Anne; Millet, Maurice; Zahn, Sandrine; Ronot, Pascale; Masoudi, Islah El; Rojas, Emilio; Uhlrich, Pierre; Nero, Mirella Del; Massemin, Sylvie

doi:10.1007/s11252-022-01305-9

Cited by 2 publications

(1 citation statement)

References 98 publications

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“…Further, ecological features might not just act to synchronise population age structure through effects on age-specific survival, but also through their effects on reproduction. For example, great tit reproductive rates vary along an urban–natural gradient (Bukor et al 2022; Charmantier et al 2017), and reproductive responses to weather depend on whether breeding takes place in urban or natural habitats (Saulnier et al 2023). Thus, if populations that are closer together experience more similar habitat types, this might induce spatial synchrony in their population dynamics.…”

Section: Discussionmentioning

confidence: 99%

Continent-wide drivers of spatial synchrony in age structure across wild great tit populations

Woodman,

Vriend,

Adriaensen

et al. 2024

Preprint

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Spatio-temporal variation in age structure influences population dynamics, yet we have limited understanding of the spatial scale at which its fluctuations are synchronised between populations. Using 32 great tit populations, spanning 3200km and>130,000 birds across 67 years, we quantify spatial synchrony in breeding age structure and its drivers. We show that larger clutch sizes, colder winters and summers, and larger beech crops lead to younger populations. We report distant-dependent spatial synchrony of age structure, which is maintained at approximately 650km. Despite covariation with age structure, reproductive and environmental variables do not influence the scale of synchrony, except for a moderate effect of beech masting. We suggest that local ecological and density-dependent dynamics impact how environmental variation interacts with age structure, influencing estimates of the environment’s effect on spatial synchrony. Our analyses demonstrate the operation of synchrony in age structure over large scales, with implications for age-dependent demography in populations.

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Section: Discussionmentioning

confidence: 99%

Continent-wide drivers of spatial synchrony in age structure across wild great tit populations

Woodman,

Vriend,

Adriaensen

et al. 2024

Preprint

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Unveiling the urban colonization of the Asian water monitor (Varanus salvator) across its distribution range using citizen science

Luna,

Rausell-Moreno

2024

PeerJ

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Background This study aims to investigate the urban colonization of the Asian water monitor (Varanus salvator) across its entire range of distribution, addressing the paucity of research on this species in urban ecosystems. The research spans the geographic range of the Asian water monitor, focusing on urbanized areas where the species accumulates more observations (Bangkok, Colombo, Jakarta, Kuala Lumpur and Singapore). Methods We conducted a systematic review to comprehensively assess the current knowledge of the species’ presence in cities. Additionally, citizen science data from repositories like GBIF (Global Biodiversity Information facility ) were utilized to analyze the distribution patterns of V. salvator in urban environments. To elucidate urban distribution and correct collection biases, observations were weighted by sampling effort, using as a proxy all squamate occurrences available from 2010–2023, including V. salvator. Results Despite the widespread presence of the Asian water monitor in numerous cities within its distribution range, the available studies on the topic appear to be scarce. Existing research primarily consists of descriptive reports on diet and behavior. Our findings indicate that V. salvator predominantly colonizes green patches in urban areas, such as parks and small gardens. Larger cities exhibit higher records, potentially due to both permanent populations and increased citizen science reporting. Conclusions The Asian water monitor, as the largest lizard with established populations in cities, remains scarcely studied on a broader scale. However, the urban design of each city seems relevant to understand the distribution patterns within each context. Our study highlights the need for further research to explore the ecological and human dimensions associated with the species’ presence in urban environments.

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Reproductive differences between urban and forest birds across the years: importance of environmental and weather parameters

Cited by 2 publications

References 98 publications

Continent-wide drivers of spatial synchrony in age structure across wild great tit populations

Continent-wide drivers of spatial synchrony in age structure across wild great tit populations

Unveiling the urban colonization of the Asian water monitor (Varanus salvator) across its distribution range using citizen science

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