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Research articlesMigration by soaring or flapping: numerical atmospheric simulations reveal that turbulence kinetic energy dictates bee-eater flight mode
Published:06 April 2011https://doi.org/10.1098/rspb.2011.0358
Abstract
Aerial migrants commonly face atmospheric dynamics that may affect their movement and behaviour. Specifically, bird flight mode has been suggested to depend on convective updraught availability and tailwind assistance. However, this has not been tested thus far since both bird tracks and meteorological conditions are difficult to measure in detail throughout extended migratory flyways. Here, we applied, to our knowledge, the first comprehensive numerical atmospheric simulations by mean of the Regional Atmospheric Modeling System (RAMS) to study how meteorological processes affect the flight behaviour of migrating birds. We followed European bee-eaters (Merops apiaster) over southern Israel using radio telemetry and contrasted bird flight mode (flapping, soaring–gliding or mixed flight) against explanatory meteorological variables estimated by RAMS simulations at a spatial grid resolution of 250 × 250 m2. We found that temperature and especially turbulence kinetic energy (TKE) determine bee-eater flight mode, whereas, unexpectedly, no effect of tailwind assistance was found. TKE during soaring–gliding was significantly higher and distinct from TKE during flapping. We propose that applying detailed atmospheric simulations over extended migratory flyways can elucidate the highly dynamic behaviour of air-borne organisms, help predict the abundance and distribution of migrating birds, and aid in mitigating hazardous implications of bird migration.
References
- 1
Nathan R., 2005Long-distance biological transport processes through the air: can nature's complexity be unfolded in silico?Divers. Distrib. 11, 131–137.doi:10.1111/j.1366-9516.2005.00146.x (doi:10.1111/j.1366-9516.2005.00146.x). Crossref, ISI, Google Scholar - 2
Kunz T. H., 2008Aeroecology: probing and modeling the aerosphere. Integr. Comp. Biol. 48, 1–11.doi:10.1093/icb/icn037 (doi:10.1093/icb/icn037). Crossref, PubMed, ISI, Google Scholar - 3
Thorup K., Alerstam T., Hake M.& Kjellen N. . 2006Traveling or stopping of migrating birds in relation to wind: an illustration for the osprey. Behav. Ecol. 17, 497–502.doi:10.1093/beheco/arj054 (doi:10.1093/beheco/arj054). Crossref, ISI, Google Scholar - 4
Stefanescu C., Alarcon M.& Vila A. A. . 2007Migration of the painted lady butterfly, Vanessa cardui, to north-eastern Spain is aided by African wind currents. J. Anim. Ecol. 76, 888–898.doi:10.1111/j.1365-2656.2007.01262.x (doi:10.1111/j.1365-2656.2007.01262.x). Crossref, PubMed, ISI, Google Scholar - 5
Bowlin M. S.& Wikelski M. . 2008Pointed wings, low wingloading and calm air reduce migratory flight costs in songbirds. PLoS ONE 3, e2154.doi:10.1371/journal.pone.0002154 (doi:10.1371/journal.pone.0002154). Crossref, PubMed, ISI, Google Scholar - 6
Shamoun-Baranes J.& van Loon E. . 2006Energetic influence on gull flight strategy selection. J. Exp. Biol. 209, 3489–3498.doi:10.1242/jeb.02385 (doi:10.1242/jeb.02385). Crossref, PubMed, ISI, Google Scholar - 7
Brattstrom O., Kjellen N., Alerstam T.& Akesson S. . 2008Effects of wind and weather on red admiral, Vanessa atalanta, migration at a coastal site in southern Sweden. Anim. Behav. 76, 335–344.doi:10.1016/j.anbehav.2008.02.011 (doi:10.1016/j.anbehav.2008.02.011). Crossref, ISI, Google Scholar - 8
Israd S. A.& Gage S. H. . 2001Flow of life in the atmosphere. East Lansing, MI: Michigan State University Press. Google Scholar - 9
- 10
Pennycuick C. J. . 1969The mechanics of bird migration. Ibis 111, 525–556.doi:10.1111/j.1474-919X.1969.tb02566.x (doi:10.1111/j.1474-919X.1969.tb02566.x). Crossref, ISI, Google Scholar - 11
Pennycuick C. J. . 1972Soaring behaviour and performance of some East African birds observed from a motorglider. Ibis 114, 178–218.doi:10.1111/j.1474-919X.1972.tb02603.x (doi:10.1111/j.1474-919X.1972.tb02603.x). Crossref, ISI, Google Scholar - 12
Hedenström A. . 1993Migration by soaring or flapping flight in birds: the relative importance of energy cost and speed. Phil. Trans. R. Soc. Lond. B 342, 353–361.doi:10.1098/rstb.1993.0164 (doi:10.1098/rstb.1993.0164). Link, ISI, Google Scholar - 13
Shannon H. D., Young G. S., Yates M. A., Fuller M. R.& Seegar W. S. . 2002American White Pelican soaring flight times and altitudes relative to changes in thermal depth and intensity. Condor 104, 679–683.doi:10.1650/0010-5422(2002)104[0679:AWPSFT]2.0.CO;2 (doi:10.1650/0010-5422(2002)104[0679:AWPSFT]2.0.CO;2). Crossref, ISI, Google Scholar - 14
Yamada T.& Mellor G. . 1975A simulation of the Wangara atmospheric boundary layer data. J. Atmos. Sci. 32, 2309–2329.doi:10.1175/1520-0469(1975)032<2309:ASOTWA>2.0.CO;2 (doi:10.1175/1520-0469(1975)032<2309:ASOTWA>2.0.CO;2). Crossref, ISI, Google Scholar - 15
Stull R. B. . 1988An introduction to boundary layer meteorology. Dordrecht, The Netherlands: Kluwer Academic Publishers. Crossref, Google Scholar - 16
- 17
Welch A., Welch L.& Irving F. . 1977New soaring pilot, 3rd edn.London, UK: John Murray. Google Scholar - 18
Kerlinger P.& Moore F. . 1989Atmospheric structure and avian migration. Current ornithology, vol. 6 (ed.& Power D. M. ), pp. 109–142. New York, NY: Plenum Press. Crossref, Google Scholar - 19
Alerstam T.& Lindström A. . 1990Optimal bird migration: the relative importance of time, energy, and safety. Bird migration: the physiology and ecophysiology (ed.& Gwinner E. ), pp. 331–351. Berlin, Germany: Springer. Crossref, Google Scholar - 20
Liechti F.& Bruderer B. . 1998The relevance of wind for optimal migration theory. J. Avian Biol. 29, 561–568.doi:10.2307/3677176 (doi:10.2307/3677176). Crossref, ISI, Google Scholar - 21
Pielke R. A., 1992A comprehensive meteorological modeling system—RAMS. Meteorol. Atmos. Phys. 49, 69–91.doi:10.1007/BF01025401 (doi:10.1007/BF01025401). Crossref, ISI, Google Scholar - 22
Cotton W. R., 2003RAMS 2001: current status and future directions. Meteorol. Atmos. Phys. 82, 5–29.doi:10.1007/s00703-001-0584-9 (doi:10.1007/s00703-001-0584-9). Crossref, ISI, Google Scholar - 23
Walko R. L., 2000Coupled atmosphere-biophysics-hydrology models for environmental modeling. J. Appl. Meteorol. 39, 931–944.doi:10.1175/1520-0450(2000)039<0931:CABHMF>2.0.CO;2 (doi:10.1175/1520-0450(2000)039<0931:CABHMF>2.0.CO;2). Crossref, ISI, Google Scholar - 24
- 25
Snow D.& Perrins C. . 1998The complete birds of the Western Palearctic on CD-ROM. Oxford, UK: Oxford University Press. Google Scholar - 26
Cochran W. W.& Wikelski M. . 2005Individual migratory tactics of New World Catharus thrushes: current knowledge and future tracking options from space. Birds of two Worlds (eds, Marra P.& Greenberg R. ), pp. 274–289. Washington, DC: Smithsonian Press. Google Scholar - 27
Lord R. D., Bellrose F. C.& Cochran W. W. . 1962Radio telemetry of the respiration of a flying duck. Science 137, 39–40.doi:10.1126/science.137.3523.39 (doi:10.1126/science.137.3523.39). Crossref, PubMed, ISI, Google Scholar - 28
Sapir N., Wikelski M., McCue M. D., Pinshow B.& Nathan R. . 2010Flight modes in migrating European bee-eaters: heart rate may indicate low metabolic rate during soaring and gliding. PLoS ONE 5, e13956.doi:10.1371/journal.pone.0013956 (doi:10.1371/journal.pone.0013956). Crossref, PubMed, ISI, Google Scholar - 29
Sapir N., Wikelski M., Avissar R.& Nathan R. . 2011Timing and flight mode of departure in migrating European bee-eaters in relation to multi-scale meteorological processes. Behav. Ecol. Sociobiol. (doi:10.1007/s00265-011-1146-x). Crossref, ISI, Google Scholar - 30
Cochran W. W. . 1975Following a migrating peregrine from Wisconsin to Mexico. Hawk Chalk 14, 28–37. Google Scholar - 31
Cochran W. W., Bowlin M. S.& Wikelski M. . 2008Wingbeat frequency and flap-pause ratio during natural migratory flight in thrushes. Integr. Comp. Biol. 48, 134–151.doi:10.1093/icb/icn044 (doi:10.1093/icb/icn044). Crossref, PubMed, ISI, Google Scholar - 32
Cochran W. W.& Kjos C. G. . 1985Wind drift and migration of thrushes: a telemetry study. Ill. Nat. Hist. Surv. Bull. 33, 297–330. Google Scholar - 33
Kalnay E., 1996The NCEP/NCAR 40-year reanalysis project. Bull. Am. Meteorol. Soc. 77, 437–471.doi:10.1175/1520-0477(1996)077<0437:TNYRP>2.0.CO;2 (doi:10.1175/1520-0477(1996)077<0437:TNYRP>2.0.CO;2). Crossref, ISI, Google Scholar - 34
Burnham K. P.& Anderson D. R. . 2002Model selection and multimodel inference, a practical information-theoretic approach, 2nd edn.New York, NY: Springer. Google Scholar - 35
- 36
Korn E. L.& Graubard B. I. . 1995Examples of differing weighted and unweighted estimates from a sample survey. Am. Stat. 49, 291–295.doi:10.2307/2684203 (doi:10.2307/2684203). Crossref, ISI, Google Scholar - 37
- 38
Alerstam T. . 1975Crane Grus grus migration over sea and land. Ibis 117, 489–495.doi:10.1111/j.1474-919X.1975.tb04241.x (doi:10.1111/j.1474-919X.1975.tb04241.x). Crossref, ISI, Google Scholar - 39
Pennycuick C. J., Alerstam T.& Larsson B. . 1979Soaring migration of the common crane Grus grus observed by radar and from an aircraft. Ornis Scand. 10, 241–251.doi:10.2307/3676068 (doi:10.2307/3676068). Crossref, Google Scholar - 40
Horvitz N. . 2009Slow and safe or fast and risky: a comparative analysis of soaring–gliding flight performance. M.Sc. thesis, The Hebrew University of Jerusalem, Jerusalem. Google Scholar - 41
Shamoun-Baranes J., Liechti O., Yom-Tov Y.& Leshem Y. . 2003Using a convection model to predict altitudes of white stork migration over central Israel. Bound. Lay. Meteorol. 107, 673–681.doi:10.1023/A:1022824008388 (doi:10.1023/A:1022824008388). Crossref, ISI, Google Scholar - 42
Walko R. L.& Avissar R. . 2008The Ocean–Land–Atmosphere Model (OLAM). I. shallow-water tests. Mon. Weather Rev. 136, 4033–4044.doi:10.1175/2008MWR2522.1 (doi:10.1175/2008MWR2522.1). Crossref, ISI, Google Scholar - 43
Walko R. L.& Avissar R. . 2008The Ocean–Land–Atmosphere Model (OLAM). II. formulation and tests of the nonhydrostatic dynamic core. Mon. Weather Rev. 136, 4045–4062.doi:10.1175/2008MWR2523.1 (doi:10.1175/2008MWR2523.1). Crossref, ISI, Google Scholar - 44
Bowlin M. S., 2010Grand challenges in migration biology. Integr. Comp. Biol. 50, 261–279.doi:10.1093/icb/icq013 (doi:10.1093/icb/icq013). Crossref, PubMed, ISI, Google Scholar
