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- W97404557 abstract "This chapter discusses the results of a long-term study on changes in rainforest birds in Gabon, West Africa, following local deforestation. A 2 km 2 study site at M'Passa in northeastern Gabon was entirely covered by mature rainforest originally and supported 175 bird species, including 30 sibling species. Statistical analysis shows that sibling species, which increased to 110, contributed more to the enhancement of local species richness than nonsibling species. Special attention is paid to the spatial organization of the species forming the sibling pairs. In the mature rainforest, two pairs of sibling species were completely syntopic, without any visible spatial segregation; in four pairs, the sibling species were vertically segregated, with one in the canopy and one in the undergrowth; and in five pairs, the species were horizontally segregated, with one in the plateau and one in the slope and river habitats. After deforestation, three pairs of new immigrants were found exclusively in syntopy in the cleared areas, but the majority, some 30 pairs, was composed of one species restricted to the rain forest and its sibling invading the deforested area. Inter-specific isolation mechanisms that prevent territorial contests and hybridization were studied at the contact zone; most were related to the use of head coloration patterns in species displaying in dense vegetation and to wing or tail patterns in those displaying in more open places. Finally, the role of the sibling species is discussed from the point of view of conservation on local, regional, and global scales." @default.
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- W97404557 date "1996-01-01" @default.
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- W97404557 title "Role of the Sibling Species in the Dynamics of the Forest-Bird Communities in M'Passa (Northeastern Gabon)" @default.
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- W97404557 doi "https://doi.org/10.1016/b978-012178075-3/50011-8" @default.
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