Biodiversity and Conservation

, Volume 23, Issue 6, pp 1469–1484

Comparison of avian assemblage structures in two upper montane forests of the Cameroon volcanic line: lessons for bird conservation

Authors

  • Eric Djomo Nana
    • Department of Ecology, Faculty of ScienceCharles University in Prague
    • IRTC—International Research and Training Center
  • Ondřej Sedláček
    • Department of Ecology, Faculty of ScienceCharles University in Prague
  • Nicholas Bayly
    • SELVA—Investigación para la Conservación en el Neotropico
  • Michal Ferenc
    • Department of Ecology, Faculty of ScienceCharles University in Prague
  • Tomáš Albrecht
    • Department of Zoology, Faculty of ScienceCharles University in Prague
    • Institute of Vertebrate Biology v.v.i., Academy of Sciences of the Czech Republic
  • Jiří Reif
    • Institute for Environmental SciencesCharles University in Prague
  • Francis Njie Motombi
    • Botanic Garden
    • Department of Ecology, Faculty of ScienceCharles University in Prague
Original Paper

DOI: 10.1007/s10531-014-0677-7

Cite this article as:
Nana, E.D., Sedláček, O., Bayly, N. et al. Biodivers Conserv (2014) 23: 1469. doi:10.1007/s10531-014-0677-7

Abstract

The Cameroon volcanic line montane forests host specific avian assemblages with many endemic species. Such unique bird assemblages deserve adequate description for proper protection. For this purpose, we sampled birds in the upper montane forests of Mts Cameroon and Oku situated at ~2,250 m. We combined point counts and continuous observations to describe species composition and estimate densities of particular species. In total, we recorded 106 species; 45 only on Mt Oku, 21 only on Mt Cameroon, and 40 common to both mountains. The higher species richness on Mt Oku was due to non-forest species that invade the forest interior due to recent human disturbance. Endemic species of the Cameroon volcanic line and montane non-endemic species had higher abundances than widespread species in general. As a result, we did not find a positive abundance–range-size relationship for both locations. Our findings support a previously made observation that montane species of the Cameroon volcanic line have higher densities compared to widespread species. However, we also show that the structures of avian assemblages vary between sites as species spatial turnover was lower on Mt Cameroon than on Mt Oku and species common to both were more abundant on Mt Cameroon. This could be attributed to the more pristine forest on Mt Cameroon, with higher annual rainfall but also due to lower human impact and the existence of a continuous forest. Conservation action within the broader landscape context is thus necessary to secure diverse montane forests in West-Central Africa in the future.

Keywords

Assemblage structure Species richness Abundance–range size relationship West-Central Africa Range-restricted species

Supplementary material

10531_2014_677_MOESM1_ESM.docx (24 kb)
Supplementary material 1 (DOCX 23 kb)

Copyright information

© Springer Science+Business Media Dordrecht 2014