December 20, 2010
Researcher Kateřina Tvardíková surveyed bird populations in primary forest and 7-year-old secondary forest following slash-and-burning in the Wanang Conservation Area along the Ramu River on the island of New Guinea. While abundance of birds was similar in both primary forest and regenerating secondary, species diversity was different. Tvardíková recorded 98 distinct bird species in primary forest and 78 species in secondary, a decline of just over 20%. In addition, 31 of the bird species were found only in primary forest, while 7 species were found only in secondary forest. Finally, important species, such as those that eat insects (insectivores) and those that disperse seeds (frugivores) were found to be "adversely affected by habitat modification […] and they seem to be confined to primary or relatively undisturbed forests," Tvardíková writes.
Tanysiptera galatea. Photo by Kateřina Tvardíková
CITATION: Tvardíková, K. 2010. Bird abundances in primary and secondary growths in Papua New Guinea: a preliminary assessment. Tropical Conservation Science Vol. 3 (4) :373-388.