globalchange  > 气候变化与战略
DOI: 10.1111/jav.02350
论文题名:
Heat dissipation behaviour of birds in seasonally hot arid-zones: are there global patterns?
作者: Pattinson N.B.; Thompson M.L.; Griego M.; Russell G.; Mitchell N.J.; Martin R.O.; Wolf B.O.; Smit B.; Cunningham S.J.; McKechnie A.E.; Hockey P.A.R.
刊名: Journal of Avian Biology
ISSN: 9088857
出版年: 2020
卷: 51, 期:2
语种: 英语
英文关键词: birds ; climate change ; heat dissipation behaviour ; heat stress ; vulnerability
Scopus关键词: air temperature ; arid region ; behavioral response ; bird ; body mass ; drinking ; energy dissipation ; fitness ; global perspective ; heat flow ; interspecific variation ; temperature effect ; vulnerability ; Africa ; Australia ; Kalahari Desert ; United States ; Aves
英文摘要: Quantifying organismal sensitivity to heat stress provides one means for predicting vulnerability to climate change. Birds are ideal for investigating this approach, as they display quantifiable fitness consequences associated with behavioural and physiological responses to heat stress. We used a recently developed method that examines correlations between readily-observable behaviours and air temperature (Tair) to investigate interspecific variation in avian responses to heat stress in seasonally hot, arid regions on three continents: the southwestern United States, the Kalahari Desert of southern Africa and the Gascoyne region of western Australia. We found substantial interspecific variation in heat dissipation behaviours (wing-drooping, panting, activity-reduction, shade-seeking) across all three regions. However, pooling the data revealed that little of this interspecific variation was systematically explained by organismal traits (foraging guild, diet, drinking dependency, body mass or activity levels) at the scale we tested. After accounting for phylogeny, we found that larger birds engaged in wing-drooping behaviour at lower Tair and had lower activity levels at high Tair compared to smaller birds, indicating an effect of body mass on heat dissipation behaviour (HDB). In the Kalahari, reliance on drinking was correlated with significantly lower Tair at which panting commenced, suggesting a key role of water acquisition in HDB in that region. Birds also tended to retreat to shade at relatively lower Tair when more active, suggesting a behavioural trade-off between activity, heat load and microsite selection. Our results imply that the causes underlying interspecific variation in heat dissipation behaviours are complex. While the variation we observed was not systematically explained by the broad scale organismal traits we considered, we predict that the indices themselves will still reflect vulnerability to potential fitness costs of high air temperatures. Further research is needed on a species-specific basis to establish the functional significance of these indices. © 2019 Nordic Society Oikos. Published by John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159519
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作者单位: DST-NRF Centre of Excellence at the FitzPatrick Inst. of African Ornithology, Dept of Zoology and Entomology, Univ. of Pretoria, Hatfield, South Africa; South African Research Chair in Conservation Physiology, South African National Biodiversity Inst., Pretoria, South Africa; Dept of Biology, Univ. of New Mexico, Albuquerque, NM, United States; School of Biological Sciences, The Univ. of Western Australia, Crawley, WA, Australia; FitzPatrick Inst. of African Ornithology, DST–NRF Centre of Excellence, Univ. of Cape Town, Rondebosch, South Africa; Dept of Zoology and Entomology, Rhodes Univ., Grahamstown, South Africa

Recommended Citation:
Pattinson N.B.,Thompson M.L.,Griego M.,et al. Heat dissipation behaviour of birds in seasonally hot arid-zones: are there global patterns?[J]. Journal of Avian Biology,2020-01-01,51(2)
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