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Hanya G, Zamma K, Hayaishi S, Yoshihiro S, Tsuriya Y, Sugaya S, Kanaoka MM, Hayakawa S & Takahata Y (2005) Comparisons of food availability and density of Japanese macaques in primary, naturally regenerated and plantation forests. American Journal of Primatology 66: 245-262.
Abstract
Food availability and density of Japanese
macaques in Yakushima, southern Japan, were
compared among primary forest and two habitats
with logging disturbance and different regeneration
histories. The study was conducted in an
undisturbed national park, forest that was
logged 7-18 years ago and later naturally
regenerated, and forest that was logged 19-27
years ago and later planted with Japanese
cedar Cryptomeria japonica trees. The plantation forest was primarily
composed of a large Cryptomeria japonica trees at low stand density, while the naturally
regenerated forest was composed of many small
trees. Total basal area and number of trees
in primary forest was comparable to those
in plantation forest. Annual fruit production
was greatest in naturally regenerated forest,
intermediate in primary forest, and negligible
in plantation forest. Herb availability was
high in naturally regenerated forest, but
low in primary and plantation forests. Group
density of Japanese macaques was high in
naturally regenerated forest, intermediate
in primary forest, and low in plantation
forest. Since group size in naturally regenerated
forest was small, individual density was
almost the same as in primary forest. These
results suggest that the effects on macaques
of regeneration vary between the two habitats.
Plantation forest consists mostly of Cryptomeria japonica, which supplies only flowers as food in
a limited season, and the density of macaques
is smaller there. On the other hand, in naturally
regenerated forest, fruit production and
herb availability are high probably due to
the enhanced light conditions after logging
and the macaque density there is as high
as in primary forest.
Key words: Cryptomeria japonica; expansive afforestation; frugivore; logging;
natural regeneration; plantation
<Written by: Goro Hanya (hanya.goro.5z<atmark>kyoto-u.ac.jp)>
<Contact: Goro Hanya (hanya.goro.5z<atmark>kyoto-u.ac.jp)>
<Last update: December 5, 2005>