Silviculture Research Division
Silviculture Research Division
Sakai A.,Japan International Research Center for Agricultural science |
Sakai A.,Japan Forestry and Forest Products Research Institute |
Visaratana T.,Silviculture Research Division |
Vacharangkura T.,Silviculture Research Division |
And 2 more authors.
Japan Agricultural Research Quarterly | Year: 2014
To develop silvicultural methods for dipterocarp species in degraded lands in a tropical monsoon climate, we examined uneven-aged forest management, in which dipterocarp trees were planted under nurse trees, by monitoring their growth for 20 years. In 1989, seedlings of four dipterocarp species (Dipterocarpus alatus, D. turbinatus, Hopea odorata and Shorea henryana) were planted beneath a 3-year-old Leucaena leucocephala plantation and in an open site in Sakaerat, north-east Thailand. The survival rate and tree size of the dipterocarp seedlings were monitored at both sites until 1995. Surand svival rates of the dipterocarp trees were significantly better under the Leucaena plantation. However, no apparent difference was observed in basal area between both sites, since saw vigorous growth of the surviving seedlings compensated for the loss of dead seedlings at the open site. Our results showed that D. alatus and H. odorata could be planted in an open site due to the vigorous growth of the seedlings, but that it was preferable to plant D. turbinatus beneath nurse trees. The Leucaena plantation was partially thinned to 50, 75 and 100% (clear-cut) in 1993, and the survival rate and growth of the dipterocarps was monitored until 2009. Thinning had no apparent effect on the survival rates of the dipterocarp seedlings. Although relative growth rates (RGR) of the dipterocarps reduced after thinning, thinning rates did not affect the growth of the dipterocarps. After thinning, dipterocarp trees overtook Leucaena in height at all thinning rates, possibly from 1999. An uneven-aged system combining Leucaena and dipterocarp trees is likely to be applicable to several dipterocarp species.
Ware J.L.,American Museum of Natural History |
Lal S.,Silviculture Research Division |
Grimaldi D.A.,American Museum of Natural History
Entomologica Americana | Year: 2010
A new species of Neotermes, N. gnathoferrum, is described based on soldiers, imagoes, queens and workers. Neotermes gnathoferrum is one of three Fijian species of Neotermes, along with N. papua and N. samoanus, known to infest mahogany as well as other economically important native trees. A diagnostic key is provided to distinguish these species. The lectotype and paralectotypes for Neotermes papua are also designated here. © 2010 New York Entomological Society.
PubMed | Silviculture & Research Division, U.S. Department of Agriculture and Waiariki Institute of Technology
Type: | Journal: ZooKeys | Year: 2015
A taxonomic review of the genus Ceresium (Coleoptera: Cerambycidae) found within the Fiji Islands is presented. A total of 17 species is treated. Full morphological descriptions and comparative images of each species are included, along with a dichotomous key for their identification.