The Mediterranean Sea has separated the sclerophyllous forests of southern Europe and northern Africa for millions of years, but its role structuring forest bird assemblages remains unclear. To address this issue we sampled bird assemblages in cork oak woodlands located north and south of the Strait of Gibraltar and compared abundance, diversity, and species and guild assemblage structure between regions. Abundance and diversity patterns were remarkably similar, but dissimilarity analyses of species and guild composition revealed differences in bird assemblage structure between regions. Differences are partly attributable to the effect of the Mediterranean as barrier to the dispersal of forest birds; a few species were unable to colonize North Africa, and many that colonized it remained in sufficient isolation to evolve into distinct taxa. In addition to this divergence of biogeographic genesis, assemblages also differ because in North African cork oak woodlands forest and insectivorous specialist species are less abundant. This dissimilarity could be due to the effect of different exploitation levels present in each region. Managed cork oak woodlands are widespread in the Western Mediterranean, and are valuable because they conciliate economic exploitation with high biodiversity. In North Africa these woodlands are of greater conservation concern because they harbour endemic bird species that give its assemblage a distinct character, cover a smaller area, and are currently under greater pressure from overexploitation. These results highlight the importance to implement management practices that increase resilience and maintain biodiversity value throughout the range of cork oak woodlands.
Generalized Linar Model
Ajbilou, R., T. Marañón and J. Arroyo. 2006. Ecological and bio-geographical analyses of Mediterranean forests of northern Morocco. Acta Oecol. 29:104–113.
Berrahmouni, N., P. Regato, M. Ellatifi, H. Daly-Hassen, M. Bugalho, S. Bensaid, M. Diáz and J. Aronson. 2009. Ecoregional planning for biodiversity conservation. In: Aronson, J., Pereira, J. S., Pausas, J. G. (eds.), Cork Oak Woodlands on the Edge. Island Press, Washington, USA, pp. 203–216.
Bibby, C. J., N.D. Burgess, D.A. Hill and S.H. Mustoe. 2005. Bird Census Techniques. Elsevier Academic Press, London, UK.
Blondel, J. 1995. Biogeographie: Approche Ecologique et Evolutive. Masson, Paris, France.
Blondel, J., J. Aronson, J.Y. Bodiou and G. Boeuf. 2010. The Mediterranean Region: Biological Diversity in Space and Time. Oxford University Press, Oxford, UK.
Borcard, D., F. Gillet and P. Legendre. 2011. Numerical Ecology with R. Springer, New York, USA.
Brito, P.H. 2005. The influence of Pleistocene glacial refugia on tawny owl genetic diversity and phylogeography in western Europe. Mol. Ecol. 14:3077–3094.
Broderick, D., Y. Idaghdour, A. Korrida and J. Hellmich. 2003. Gene fow in great bustard populations across the Strait of Gibraltar as elucidated from excremental PCR and mtDNA sequencing. Conserv. Genet. 4:793–800.
Bugalho, M., T. Plieninger, J. Aronson, M. Ellatif and D.G. Crespo. 2009. Open woodlands: A diversity of uses (and overuses). In: Aronson, J., Pereira, J.S., Pausas, J.G. (eds.), Cork Oak Woodlands on the Edge. Island Press, Washington, USA, pp. 33–45.
Bugalho, M.N., M.C. Caldeira, J.S. Pereira, J. Aronson and J.G. Pausas. 2011. Mediterranean cork oak savannas require human use to sustain biodiversity and ecosystem services. Front. Ecol. Environ. 9:278–286.
Carnicer, J., M. Coll, M. Ninyerola, X. Pons, G. Sánchez and J. Peñuelas. 2011. Widespread crown condition decline, food web disruption, and amplified tree mortality with increased climate change-type drought. Proc. Natl. Acad. Sci. USA 108:1475–1478.
Cherkaoui, I., S. Selmi, J. Boukhriss, R.I. Hamid and D. Mohammed. 2009. Factors affecting bird richness in a fragmented cork oak forest in Morocco. Acta Oecol. 35:197–205.
Cramp, S. and K.E.L. Simmons. 2006. BWPi: The Birds of the Western Palearctic interactive (DVD-ROM). BirdGuides Ltd., Sheffeld, UK.
Colwell, R. 2009. EstimateS: Statistical estimation of species richness and shared species from samples. Version 8.2. User’s Guide and application published at: https://doi.org/purl.oclc.org/estimates.
De Lattin, G. 1949. Beiträge zur Zoogeographie des Mittelmeer-gebietes. Verhandlungen der deutschen Zoologischen Gesell-schaft, Kiel, Suppl 13:143–151.
Díaz, M., P. Campos and F.J. Pulido. 1997. The Spanish dehesas: a diversity in land-use and wildlife. In: Pain, D.J., Pienkowski, M.W. (eds.), Farming and Birds in Europe. Academic Press, Cambridge, UK, pp 178–209.
Duggen, S., K. Hoernle, P. van den Bogaard, L. Rüpke and J.P. Morgan. 2003. Deep roots of the Messinian salinity crisis. Nature 422:602–606.
EBCC. 2010. Population trends of European common birds 2010. EBCC report. https://doi.org/www.ebcc.info/index.php?ID=392 (accessed 31/03/2015).
European Habitat Directive. url: https://doi.org/ec.europa.eu/environment/na-ture/legislation/habitatsdirective/ (accessed 31/03/2015).
Fishpool, L.D.C. and M.I. Evans. 2001. Important Bird Areas in Africa and Associated Islands: Priority Sites for Conservation. Birdlife International, Cambridge, UK.
García-Mudarra, J.L., C. Ibáñez and J. Juste. 2009. The Straits of Gibraltar: barrier or bridge to Ibero-Moroccan bat diversity? Biol. J. Linn. Soc. 96:434–450.
Gill, F. and D. Donsker (eds.) 2015. IOC World Bird List (v. 5.1). DOI: 10.143/IOC.ML.5.1.
Godinho, C. and J.E. Rabaça. 2011. Birds like it Corky: the influence of habitat features and management of ‘montados’ in breeding bird communities. Agrofor. Syst. 82:183–195.
Gotelli, N.J. and A. Chao. 2013. Measuring and estimating species richness, species diversity, and biotic similarity from sampling data. In: Levin, S.A. (ed) The Encyclopaedia of Biodiversity. Second edition, volume 5. Academic Press, Waltham, Massachusetts, USA, pp 195–211.
Gotelli, N.J. and G.R. Graves. 1996. Null Models in Ecology. Smithsonian Institution Press, Washington, USA.
Habel, J.C., P. Dieker and T. Schmitt. 2009. Biogeographical connections between the Maghreb and the Mediterraenan peninsulas of southern Europe. Biol. J. Linn. Soc. 98:693–703.
Heath, M.F., C. Borggreve, N. Peet and W. Hagemeijer. 2000. European Bird Populations: Estimates and Trends. Birdlife Conservation Series No 10. Birdlife International/European Bird Census Council, Cambridge, UK.
Hoogeveen, Y., J.E. Petersen, K. Balazs and I. Higuero. 2004. High Nature Value Farmland – Characteristics, Trends and Policy Challenges. EEA Report. No 1/2004. European Environment Agency, Copenhagen, Denmark.
Husemann, M., T. Schmitt, F.E. Zachos, W. Ulrich and J.C. Habel. 2014. Palaearctic biogeography revisited: evidence for the existence of a North African refugium for Western Palaearctic biota. J. Biogeogr. 41:81–94.
Leal, A.I., R.A. Correia, J.P. Granadeiro and J.M. Palmeirim. 2011a. Impact of cork extraction on birds: Relevance for conservation of Mediterranean biodiversity. Biol. Conserv. 144:1655–1662.
Leal, A.I., R.C. Martins, J.M. Palmeirim and J.P. Granadeiro. 2011b. Influence of habitat fragments on bird assemblages in Cork Oak woodlands. Bird Study 58:309–320.
Leal, A.I., R.A. Correia, J.M. Palmeirim and J.P. Granadeiro. 2013. Does canopy pruning affect foliage-gleaning birds in managed cork oak woodlands? Agrofor. Syst. 87:355–363.
Lepage, D. 2013a. Checklist of the Birds of Morocco. Avibase, the world bird database. Retrieved from https://doi.org/avibase.bsceoc.org/on 9/07/2013.
Lepage, D. 2013b. Checklist of the Birds of Spain. Avibase, the world bird database. Retrieved from https://doi.org/avibase.bsceoc.org/on 9/07/2013.
Marañón, T., R. Ajbilou, F. Ojeda and J. Arroyo. 1999. Biodiversity of woody species in oak woodlands of southern Spain and northern Morocco. For. Ecol. Manage. 115:147–156.
Myers, N., R.A. Mittermeier, C.G. Mittermeier, G.A.B. Fonseca and J. Kent. 2000. Biodiversity hotspots for conservation priorities. Nature 403:853–858.
Ojeda, F., T. Marañón and J. Arroyo. 1996. Patterns of ecological, chorological and taxonomic diversity at both sides of the Strait of Gibraltar. J. Veg. Sci. 7:63–72.
Plieninger, T. and C. Wilbrand. 2001. Land use, biodiversity conservation, and rural development in the dehesas of Cuatro Lugares, Spain. Agrofor. Syst. 51:23–34.
Pons, J.M., G. Olioso, C. Cruaud and J. Fuchs. 2011. Phylogeography of the Eurasian green woodpecker (Picus viridis). J. Biogeogr. 38:311–325.
R Development Core Team. 2011. R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria.
Rodríguez-Sánchez, F., R. Pérez-Barrales, F. Ojeda, P. Vargas and J. Arroyo. 2008. The Strait of Gibraltar as a melting pot for plant biodiversity. Quaternary. Sci. Rev. 27:2100–2117.
Rosalino, L.M., D. Ferreira, I. Leitão and M. Santos-Reis. 2011. Usage patterns of Mediterranean agro-forest habitat components by wood mice Apodemus sylvaticus. Mamm. Biol. 76:268–273.
Saetre, G.P., T. Borge and T. Moum. 2001. A new bird species? The taxonomic status of the “Atlas Flycatcher” assessed from DNA sequence analysis. Ibis 143: 494–497.
Salzburger, W., J. Martens and C. Sturmbauer. 2002. Paraphyly of the Blue Tit (Parus caeruleus) suggested from cytochrome b sequences. Mol. Phylogenet. Evol. 24:19–25.
Silva, P.M., C.A.S. Aguiar, J. Niemelä, J.P. Sousa and A.R.M. Serrano. 2009. Cork-oak woodlands as key-habitats for biodiversity conservation in Mediterranean landscapes: a case study using rove and ground beetles (Coleoptera: Staphylinidae, Carabidae). Biodivers. Conserv. 18:605–619.
Sutherland, W.J., I. Newton and R.E. Green. 2004. Bird Ecology and Conservation: A Handbook of Techniques. Techniques in Ecology and Conservation Series. Oxford University Press, Oxford, UK.
Telleria, J. L. and T. Santos. 1993. Distributional patterns of insectivorous passerines in the Iberian forests: Does abundance decrease near the border? J. Biogeogr. 20:235–240.
Telleria, J.L. 2001. Passerine bird communities of Iberian dehesas: a review. Anim. Biodivers. Conserv. 24:67–78.
Warton, D.I., S.T. Wright and Y. Wang. 2012. Distance-based mul-tivariate analysis confound location and dispersion effects. Methods Ecol. Evol. 3:89–101.
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Correia, R.A., Franco, A.M.A. & Palmeirim, J.M. Role of the Mediterranean Sea in differentiating European and North African woodland bird assemblages. COMMUNITY ECOLOGY 16, 106–114 (2015). https://doi.org/10.1556/168.2015.16.1.12
- Geographic barrier
- Cork oak
- Quercus suber
- Biodiversity conservation
- Gill and Donsker (2015)