Abstract
Comparative analyses of interspecific differences in response to climate change can provide important insights into the factors initiating seasonal onset of reproduction in various species and subsequent fitness consequences. We present a comparative analysis based on a 30-year breeding survey of two related migratory songbird species [Reed Warbler Acrocephalus scirpaceus (RW) and Great Reed Warbler A. arundinaceus (GRW)], which coexist in reedbeds by means of various interspecific interactions. The RW advanced breeding by 15 days and shortened its breeding time window, which is a combined effect of higher temperatures, alleviated competition as a consequence of population declines in the dominant GRW, and reduced RW population. Although the breeding period of GRW changed only slightly, its clutch initiation was likewise related to temperature. Most probably, advanced breeding in RW is favoured by changes in food supply and accelerated reed growth, which provides the necessary nest concealment earlier, whereas this does not affect the GRW, a species less vulnerable to nest predation. Clutch size decreased later in the season, so that earlier breeding produced a net increase in both species. An additional increase of clutch size in GRW can be explained by the use of higher-quality territories in today’s smaller population. The main causes of nest losses were predation in RW and adverse weather in GRW, but reproductive success increased over the study period in both species, which was a consequence of larger clutches in RW, but of favourable weather during rearing and fewer total losses in GRW. Our results document that different causal mechanisms are involved in the reproductive changes of the two congeneric species living in the same habitat: RW breeding earlier by making use of competitive release and other ecological improvements, and GRW by benefiting from better rearing conditions. As species respond differentially to climate change depending on ecosystem and biotic interactions, predictions of population dynamics will remain vague until the specific response mechanisms have been elucidated.



Similar content being viewed by others
Explore related subjects
Discover the latest articles and news from researchers in related subjects, suggested using machine learning.References
Ahola M, Laaksonen T, Sippola K, Eeva T, Rainio KLE, Lehikoinen E (2004) Variation in climate warming along the migration route uncouples arrival and breeding dates. Glob Change Biol 10:1–8
Beier J (1981) Untersuchungen an Drossel—und Teichrohrsänger (Acrocephalus arundinaceus, A. scirpaceus): Bestandsentwicklung, Brutbiologie, Ökologie. J Ornithol 122:209–230
Beier J (1993) Bestandsentwicklung und Habitatkonkurrenz von Drossel—und Teichrohrsänger im Fränkischen Weihergebiet. Beih Veröff Naturschutz Landschaftspflege Bad-Württ 68:137–139
Bergmann F (1999) Langfristige Zunahme früher Bruten beim Teichrohrsänger (Acrocephalus scirpaceus) in einem südwestdeutschen Untersuchungsgebiet. J Ornithol 140:81–86
Berndt RK, Struwe-Juhl B (2004) Warum geht der Brutbestand des Drosselrohrsängers (Acrocephalus arundinaceus) in Schleswig-Holstein zurück? Corax 19:281–301
Berthold P (1990) Patterns of avian migration in light of current global “green house” effects: a central European perspective. Acta XX Congress International Ornithology, Vienna, pp 780–786
Borowiec M (1992) Breeding ethology and ecology of the reed warbler, Acrocephalus scirpaceus (Hermann 1804) at Milicz, SW Poland. Acta zool Cracov 35:315–350
Coltman DW (2005) Differentiation by dispersal. Nature 433:23–24
Cramp S (1992) Handbook of the birds of Europe the middle east and North Africa, vol 6. Oxford University Press, Oxford
Crick HQP (2004) The impact of climate change on birds. Ibis 146(Suppl 1):48–56
Crick HQP, Sparks TH (1999) Climate change related to egg-laying trends. Nature 399:423–424
Dykyjova D, Ondok JP, Priban K (1970) Seasonal changes in productivity and vertical structure of reed-stands (Phragmites communis Trin.). Phytosynthetica 4:280–287
Dyrcz A (1981) Breeding ecology of great reed warbler (Acrocephalus arundinaceus) and reed warbler (A. scirpaceus) at fish ponds in SW-Poland and lakes in NW-Switzerland. Acta ornithol 18:307–333
Dyrcz A, Zdunek W (1996) Potential food resources and nestling food in the great reed warbler (Acrocephalus arundinaceus) and reed warbler (Acrocephalus scirpaceus) at Milicz Fish Ponds (polish). Ptaki ´Slaska 11:123–132
Forstmeier W, Leisler B (2004) Repertoire size, sexual selection, and offspring viability in the great reed warbler: changing patterns in space and time. Behav Ecol 15:555–563
Haartman Lv (1982) Two modes of clutch size determination in passerine birds. J Yamashina Inst Ornithol 14:214–219
Hoi H, Eichler T, Dittami J (1991) Territorial spacing and interspecific competition in three species of reed warblers. Oecologia 87:443–448
Hoi H, Winkler H (1988) Feinddruck auf Schilfbrüter: eine experimentelle Untersuchung. J Ornithol 129:439–447
Hoi H, Winkler H (1994) Predation on nests: a case of apparent competition. Oecologia 98:436–440
Honza M, Moksnes A, Roskaft E (1999) Effect of great reed warbler Acrocephalus arundinaceus on the reproductive tactics of the reed warbler A. scirpaceus. Ibis 141:489–493
Järvinen A (1994) Global warming and the egg size of birds. Ecography 17:108–110
Kleindorfer S, Hoi H, Ille R (1997) Nestling growth patterns and antipredator responses: a comparison between four Acrocephalus warblers. Biologia 52:677–685
Lehikoinen E, Sparks TH, Zalakevicius M (2004) Arrival and departure dates. In: Møller A, Fiedler W, Berthold P (eds) Birds and climate change. Advances in ecological research, vol 35. Elsevier Academic Press, Amsterdam, pp 1–31
Leisler B (1981) Die ökologische Einnischung der mitteleuropäischen Rohrsänger (Acrocephalus, Sylviinae). I. Habitattrennung. Vogelwarte 31:35–74
Leisler B (1991) Acrocephalus arundinaceus. In: Glutz von Blotzheim UN, Bauer K (eds) Handbuch der Vögel Mitteleuropas, vol 12/I, Aula, Wiesbaden, pp 486–539
Leisler B, Dyrcz A (1988) Introduction to symposium: adaptations of marsh-nesting passerines. Acta XIX Congress international ornithology, vol II, Ottawa, Canada, pp 2595–2596
Lemoine N, Boening-Gaese K (2003) Potential impact of global climate change on species richness of long-distance migrants. Conserv Biol 17:577–586
Martin TE (2005) Abiotic versus biotic influences on habitat selection of coexisting species: climate change impacts? Ecology 82:175–188
McCarty JP (2001) Ecological consequences of recent climate change. Conserv Biol 15:320–331
Metzler G (2001) Vergleichende Untersuchungen der Brutbiologie von Teich- und Drosselrohrsänger (Acrocephalus scirpaceus Herm., 1804, Acrocephalus arundinaceus L., 1758) in einem Weihergebiet. Thesis, University of Göttingen, Göttingen
Møller AP, Hobson KA (2004) Heterogeneity in stable isotope profiles predicts coexistence of populations of barn swallows Hirundo rustica differing in morphology and reproductive performance. Proc R Soc Lond B 271:1355–1362
Møller AP, Berthold P, Fiedler W (2004) The challenge of future research on climate change and avian biology. In: Møller A, Fiedler W, Berthold P (eds) Birds and climate change. Advances in ecological research, vol 35. Elsevier Academic Press, Amsterdam, pp 237–245
Ostendorp W (1993) Schilf als Lebensraum. Beih Veröff Naturschutz Landschaftspflege Bad-Württ 68:173–280
Poulin B, Lefebvre G, Mauchamp A (2002) Habitat requirements of passerines and reedbed management in southern France. Biol Conserv 107:315–325
Pulido F, Berthold P (2004) Microevolutionary response to climatic change. In: Møller A, Fiedler W, Berthold P (eds) Birds and climate change. Advances in ecological research, vol 35. Elsevier Academic Press, Amsterdam, pp 151–183
Saino N, Szép T, Romano M, Rubolini D, Spina F, Møller AP (2004) Ecological conditions during winter predict arrival date at the breeding quarters in a trans-Saharan migratory bird. Ecol Lett 7:21–25
Sanz JJ (2003) Large-scale effect of climate change on breeding parameters of pied flycatchers in Western Europe. Ecography 26:45–50
Schulze-Hagen K (1991) Acrocephalus scirpaceus. In: Glutz von Blotzheim UN, Bauer K (eds) Handbuch der Vögel Mitteleuropas, vol 12/I, pp 433–486
Schulze-Hagen K, Leisler B, Winkler H (1996) Breeding success and reproductive strategies of two Acrocephalus warblers. J Ornithol 137:181–192
Sillett TS, Holmes RT, Sherry TW (2000) Impacts of a global climate cycle on population dynamics of a migratory songbird. Science 288:2040–2042
Stenseth NC, Mysterud A (2002) Climate, changing phenology, and other life history traits: nonlinearity and match-mismatch to the environment. Proc Natl Acad Sci USA 99:13379–13381
Stevenson IR, Bryant DM (2000) Climate change and constraints on breeding. Nature 406:366–367
Strode PK (2003) Implications of climate change for North American wood warblers (Parulidae). Glob Change Biol 9:1137–1144
Visser ME, Adriaensen F, van Balen JH, Blondel J, Dhondt AA, Van Dongen S, du Feu C, Ivankina EV, Kerimov AB, de Laet J, Matthysen E, McCleery R, Orell M, Thomson DL (2003) Variable responses to large-scale climate change in European Parus populations. Proc R Soc Lond B 270:367–372
Visser ME, Both C, Lambrechts MM (2004) Global climate change leads to mistimed avian reproduction. In: Møller A, Fiedler W, Berthold P (eds) Birds and climate change. Advances in ecological research, vol 35. Elsevier Academic Press, Amsterdam, pp 89–110
Visser ME, van Noordwijk AJ, Tinbergen JM, Lessells CM (1998) Warmer springs lead to mistimed reproduction in great tits (Parus major). Proc R Soc Lond B 265:1867–1870
Walther G-R, Post E, Menzel A, Parmesan C, Beebee TJC, Fromentin J-M, Hoegh-Guldberg O, Bairlein F (2002) Ecological responses to recent climate change. Nature 416:389–395
Winkel W, Hudde H (1997) Long term trends in reproductive traits of tits (Parus major, P. caeruleus) and Pied Flycatchers Ficedula hypoleuca. J Avian Biol 28:187–190
Winkler DW, Dunn PO, McCulloch CE (2002) Predicting the effects of climate change on avian life-history traits. Proc Natl Acad Sci USA 99:13595–13599
Author information
Authors and Affiliations
Additional information
Communicated by F. Bairlein
Rights and permissions
About this article
Cite this article
Schaefer, T., Ledebur, G., Beier, J. et al. Reproductive responses of two related coexisting songbird species to environmental changes: global warming, competition, and population sizes. J Ornithol 147, 47–56 (2006). https://doi.org/10.1007/s10336-005-0011-y
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10336-005-0011-y