The interplay of wind and uplift facilitates over-water flight in facultative soaring birds.

Details

Serval ID
serval:BIB_36B5B056EE10
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
The interplay of wind and uplift facilitates over-water flight in facultative soaring birds.
Journal
Proceedings. Biological sciences
Author(s)
Nourani E., Bohrer G., Becciu P., Bierregaard R.O., Duriez O., Figuerola J., Gangoso L., Giokas S., Higuchi H., Kassara C., Kulikova O., Lecomte N., Monti F., Pokrovsky I., Sforzi A., Therrien J.F., Tsiopelas N., Vansteelant WMG, Viana D.S., Yamaguchi N.M., Wikelski M., Safi K.
ISSN
1471-2954 (Electronic)
ISSN-L
0962-8452
Publication state
Published
Issued date
08/09/2021
Peer-reviewed
Oui
Volume
288
Number
1958
Pages
20211603
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
Flying over the open sea is energetically costly for terrestrial birds. Despite this, over-water journeys of many birds, sometimes hundreds of kilometres long, are uncovered by bio-logging technology. To understand how these birds afford their flights over the open sea, we investigated the role of atmospheric conditions, specifically wind and uplift, in subsidizing over-water flight at a global scale. We first established that ΔT, the temperature difference between sea surface and air, is a meaningful proxy for uplift over water. Using this proxy, we showed that the spatio-temporal patterns of sea-crossing in terrestrial migratory birds are associated with favourable uplift conditions. We then analysed route selection over the open sea for five facultative soaring species, representative of all major migratory flyways. The birds maximized wind support when selecting their sea-crossing routes and selected greater uplift when suitable wind support was available. They also preferred routes with low long-term uncertainty in wind conditions. Our findings suggest that, in addition to wind, uplift may play a key role in the energy seascape for bird migration that in turn determines strategies and associated costs for birds crossing ecological barriers such as the open sea.
Keywords
bio-logging, energy landscape, migration, movement ecology, route selection, soaring
Pubmed
Web of science
Open Access
Yes
Create date
04/10/2021 12:22
Last modification date
08/10/2021 5:41
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