4.7 Article

High temperatures drive offspring mortality in a cooperatively breeding bird

出版社

ROYAL SOC
DOI: 10.1098/rspb.2020.1140

关键词

climate change; cooperative breeding; dryland ecology; environmental variability; survival of young; southern pied babbler

资金

  1. University of Cambridge
  2. MAVA Foundation
  3. European Research Council [294494]
  4. DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology
  5. University of Cape Town
  6. Oppenheimer Memorial Trust [20747/01]
  7. British Ornithologists' Union
  8. Australian Research Council [FT110100188]
  9. BBSRC David Phillips Fellowship [BB/J014109/1]
  10. National Research Foundation of South Africa [99050]
  11. University of Zurich
  12. BBSRC [BB/J014109/1] Funding Source: UKRI
  13. Australian Research Council [FT110100188] Funding Source: Australian Research Council

向作者/读者索取更多资源

An improved understanding of life-history responses to current environmental variability is required to predict species-specific responses to anthopogenic climate change. Previous research has suggested that cooperation in social groups may buffer individuals against some of the negative effects of unpredictable climates. We use a 15-year dataset on a cooperative breeding arid zone bird, the southern pied babbler Turdoides bicolor, to test (i) whether environmental conditions and group size correlate with survival of young during three development stages (egg, nestling, fledgling) and (ii) whether group size mitigates the impacts of adverse environmental conditions on survival of young. Exposure to high mean daily maximum temperatures (mean T-max) during early development was associated with reduced survival probabilities of young in all three development stages. No young survived when mean T-max > 38 degrees C, across all group sizes. Low survival of young at high temperatures has broad implications for recruitment and population persistence in avian communities given the rapid pace of advancing climate change. Impacts of high temperatures on survival of young were not moderated by group size, suggesting that the availability of more helpers in a group is unlikely to buffer against compromised offspring survival as average and maximum temperatures increase with rapid anthropogenic climate change.

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