Abstract
At secondary contact closely related species may both compete over similar resources and/or hybridize. Simulation models suggest that hybridization increases the risk of extinction beyond the risk resulting from interspecific competition alone, but such combined effects are rarely studied empirically. Here, we use detailed records on pairing patterns, breeding success, local recruitment and immigration collected during 8 years (2002–2009) to investigate the underlying mechanism of the rapid displacement of pied flycatchers by collared flycatchers on the Swedish island of Öland. We found no differences in average reproductive success or reproductive lifespan between the two species. However, we show that young male pied flycatchers failed to establish new territories as the density of male collared flycatchers increased. In addition, as the relative frequency of collared flycatchers increased, the risk of hybridization dramatically increased for female pied flycatchers, which speeds up the exclusion process since there is a high fitness cost associated with hybridization between the two species. In a nearby control area, within the same island, where pied flycatchers breed in the absence of collared flycatchers, no decline in the number of breeding pairs was observed during the same period of time. Our results demonstrate the crucial importance of studying the combined effects of various types of heterospecific interactions to understand and predict the ecological and evolutionary implications of secondary contact between congeneric species. These findings are particularly interesting in the light of recent climate change since the expected range shifts of many taxa will increase competitive and sexual interactions between previously separated species.
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References
Alatalo RV, Lundberg A, Glynn C (1986) Female pied flycatchers choose territory quality and not male characteristics. Nature 323:152–153
Alatalo RV, Carlson A, Lundberg A (1988) The search cost in mate choice of the pied flycatcher. Anim Behav 36:289–291
Alatalo RV, Gustafsson L, Lundberg A (1994) Male coloration and species recognition in sympatric flycatchers. Proc Roy Soc Lond B Biol 256:113–118
Amarasekare P, Nisbet RM (2001) Spatial heterogeneity, source-sink dynamics, and the local coexistence of competing species. Am Nat 158:572–584
Borge T, Lindroos K, Nádvornik P, Syvänen AC, Sætre GP (2005) Amount of introgression in flycatcher hybrid zones reflects regional differences in pre and post-zygotic barriers to gene exchange. J Evol Biol 18:1416–1424
Chesson P, Huntly N (1997) The roles of harsh and fluctuating conditions in the dynamics of ecological communities. Am Nat 150:519–553
Confer JL (2006) Secondary contact and introgression of Golden-winged warblers (Vermivora chrysoptera): documenting the mechanism. Auk 123:958–961
Dale S, Rinden H, Slagsvold T (1992) Competition for a mate restricts mate search of female pied flycatchers. Behav Ecol Sociobiol 30:165–176
Dukes JS, Mooney HA (1999) Does global change increase the success of biological invaders? Trends Ecol Evol 14:135–139
Eeva T et al (2011) Geographical trends in the yolk carotenoid composition of the pied flycatcher (Ficedula hypoleuca). Oecologia 165:277–287
Gezelius L, Grahn M, Källander H, Karlsson J (1984) Habitat-related differences in clutch size of the Pied Flycatcher Ficedula-Hypoleuca. Ann Zool Fenn 21:209–212
Gregory RD, Vorisek P, Van Strien A, Meyling AWG, Jiguet F, Fornasari L, Reif J, Chylarecki P, Burfield IJ (2007) Population trends of widespread woodland birds in Europe. Ibis 149(Suppl 2):78–97
Gröning J, Hochkirch A (2008) Reproductive interference between animal species. Q Rev Biol 83:257–282
Gustafsson L, Pärt P (1991) Interspecific relations between collared and pied flycatchers. Proc XX Int Ornithol Congr 20:1425–1431
Hardin G (1960) Competitive exclusion principle. Science 131:1292–1297
Hochkirch A, Gröning J, Bücker A (2007) Sympatry with the devil: reproductive interference could hamper species coexistence. J Anim Ecol 76:633–642
Huntley B, Green RH, Collingham YC, Willis SG (2007) A climatic atlas of European breeding birds. The RSPB and Lynx Edicions, Barcelona
Hutchinson GE (1978) An introduction to population ecology. Yale University Press, New Haven
Kishi S, Nishida T, Tsubaki Y (2009) Reproductive interference determines persistence and exclusion in species interactions. J Anim Ecol 78:1043–1049
Konishi M, Takata K (2004) Impact of asymmetrical hybridization followed by sterile F-1 hybrids on species replacement in Pseudorasbora. Conserv Genet 5:463–474
Kuno E (1992) Competitive-exclusion through reproductive interference. Res Popul Ecol 34:275–284
Levin DA, Francisco-Ortega J, Jansen RK (1996) Hybridization and the extinction of rare plant species. Cons Biol 10:10–16
Lundberg A, Alatalo RV (1992) The pied flycatcher. Poyser, London
Mallet J (2005) Hybridization as an invasion of the genome. Trends Ecol Evol 2:229–237
Parmesan C, Yohe G (2003) A globally coherent fingerprint of climate change impacts across natural systems. Nature 421:37–42
Pärt T, Qvarnström A (1997) Badge size in collared flycatchers predicts outcome of male competition over territories. Anim Behav 54:893–899
Quinn GP, Keough MJ (2002) Experimental design and data analysis for biologists. Cambridge University Press, Cambridge
Qvarnström A (1997) Experimentally increased badge size increases male competition and reduces male parental care in the collared flycatcher. Proc Roy Soc Lond B Biol 264:1225–1231
Qvarnström A, Svedin N, Wiley C, Veen T, Gustafsson L (2005) Cross-fostering reveals seasonal changes in the relative fitness of two competing species of flycatchers. Biol Lett 1:68–71
Qvarnström A, Wiley C, Svedin N, Vallin N (2009) Life-history divergence facilitates regional coexistence of competing Ficedula flycatchers. Ecology 90:1948–1957
Qvarnström A, Rice AM, Ellegren H (2010) Speciation in Ficedula flycatchers. Philos Trans Roy Soc B 365:1841–1852
Rhymer JM, Simberloff D (1996) Extinction by hybridization and introgression. Annu Rev Ecol Syst 27:83–109
Ribeiro JMC, Spielman A (1986) The Satyr effect—a model predicting parapatry and species extinction. Am Nat 128:513–528
Rozhnov VV (1993) Extinction of the European mink: ecological catastrophe or a natural process? Lutreola 1:10–16
Sæther SA et al (2007) Sex chromosome-linked species recognition and evolution of reproductive isolation in flycatchers. Science 318:95–97
Sætre GP, Sæther SA (2010) Ecology and genetics of speciation in Ficedula flycatchers. Mol Ecol 19:1091–1106
Sætre GP, Král M, Bures S (1997) Differential species recognition abilities of males and females in a flycatcher hybrid zone. J Avian Biol 28:259–263
Sætre GP, Post E, Král M (1999) Can environmental fluctuation prevent competitive exclusion in sympatric flycatchers? Proc Roy Soc Lond B Biol 266:1247–1251
Siikamäki P (1995) Habitat quality and reproductive traits in the Pied Flycatcher—an experiment. Ecology 76:308–312
Svedin N, Wiley C, Veen T, Gustafsson L, Qvarnström A (2008) Natural and sexual selection against hybrid flycatchers. Proc Roy Soc B 275:735–744
Svensson L (1992) Identification guide to European passerines. Märstatryck, Stockholm
Tilman D (1982) Resource competition and community structure. Princeton University Press, Princeton
Vallin N, Rice AM, Bailey RI, Husby A, Qvarnström A (2011) Positive feedback between ecological and reproductive character displacement in a young avian hybrid zone. Evolution (in press)
Veen T, Borge T, Griffith SC, Sætre GP, Bures S, Gustafsson L, Sheldon BC (2001) Hybridization and adaptive mate choice in flycatchers. Nature 411:45–50
Veen T, Svedin N, Forsman JT, Hjernquist MB, Qvarnström A, Hjernquist KAT, Träff J, Klaassen M (2007) Does migration of hybrids contribute to post-zygotic isolation in flycatchers? Proc Roy Soc Lond B Biol 274:707–712
Veen T, Sheldon BC, Weissing FJ, Visser ME, Qvarnström A, Sætre GP (2010) Temporal differences in food abundance promote coexistence between two congeneric passerines. Oecologia 162:873–884
Wiley C, Fogelberg N, Sæther SA, Veen T, Svedin N, Kehlenbeck JV, Qvarnström A (2007) Direct benefits and costs for hybridizing Ficedula flycatchers. J Evol Biol 20:854–864
Wiley C, Qvarnström A, Andersson G, Borge T, Sætre GP (2009) Postzygotic isolation over multiple generations of hybrid descendents in a natural hybrid zone: how well do single-generation estimates reflect reproductive isolation? Evolution 63:1731–1739
Wirtz P (1999) Mother species–father species: unidirectional hybridization in animals with female choice. Anim Behav 58:1–12
Wolf DE, Takebayashi N, Rieseberg LH (2001) Predicting the risk of extinction through hybridization. Conserv Biol 15:1039–1053
Yoshimura J, Clark CW (1994) Population-dynamics of sexual and resource competition. Theor Popul Biol 45:121–131
Acknowledgments
We thank all persons helping us in the field and Zoologiska stiftelsen (N. V., A. R., H. A., K. K.), Värmlands nation (N. V.), the Swedish Research Council (A. Q.) and the European Science Foundation (A. Q.) for financial support. Three anonymous referees made useful suggestions that improved the manuscript.
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Vallin, N., Rice, A.M., Arntsen, H. et al. Combined effects of interspecific competition and hybridization impede local coexistence of Ficedula flycatchers. Evol Ecol 26, 927–942 (2012). https://doi.org/10.1007/s10682-011-9536-0
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DOI: https://doi.org/10.1007/s10682-011-9536-0