Entity

Time filter

Source Type


Radloff S.E.,Rhodes University | Hepburn C.,Rhodes University | Randall Hepburn H.,Rhodes University | Fuchs S.,Goethe University Frankfurt | And 4 more authors.
Apidologie | Year: 2010

Multivariate morphometric analyses of Apis cerana Fabricius, 1793 across its full geographical range were performed. Principal components plots did not reveal distinct morphoclusters. Further substructuring of the principal component plots could not initially be derived but only by introducing local labelling did it reveal six main morphoclusters. We apply geographically based common epithets to the morphoclusters and designate them as: as "Northern cerana", "Himalayan cerana" "Indian plains cerana" "Indo-chinese cerana" "Philippine cerana"and "Indo-Malayan cerana". A. cerana naturally occurs in climatic zones ranging from rainforest, savanna, steppe, grasslands and deciduous forest to taiga. The distributions of the morphoclusters are related to these physiographic and climatic factors. The taxonomy of A. cerana is formally revised and synonymous specific and infraspecific names summarized. © 2010 INRA/DIB-AGIB/EDP Sciences.


Kiyono Y.,Japan Forestry and Forest Products Research Institute | Saito S.,Japan Forestry and Forest Products Research Institute | Takahashi T.,FFPRI | Toriyama J.,Bureau of Climate Change | And 12 more authors.
Japan Agricultural Research Quarterly | Year: 2011

We examined non-destructive methodologies for practicalities in monitoring anthropogenic greenhouse gas (GHG) emissions from tropical dry-land forest under the influence of various forms of human intervention. Spaceborne SAR withstood comparison with Landsat ETM+ in land cover classification of degraded tropical forest. For measurement of carbon stock and GHG flux per unit land area, the gain-loss method requires both growth rate and removal rate of forest carbon stock. However, the latter has rarely been obtained in tropical forest. For the stock-difference method, permanent sampling plot data can be used to estimate mean carbon stock per unit land area of each forest type. For cyclic land use that includes a clear-cutting stage such as slash-and-burn agriculture, chronosequential changes in carbon stock can be predicted by determining the time and spatial-distribution of cleared land. Changes in forest biomass by logging, storm-damage, etc., may be identified by monitoring the presence and diameter of the crowns of overstory trees. We developed five equations containing the parameter for crown diameter for estimating tree biomass. Overstory height can be a parameter for estimating ecosystem carbon stock of various plant communities, and forest height can be measured by airborne and spaceborne sensors, etc. Generic equations containing the parameter for overstory height are available for estimating community biomass of tropical and subtropical forests. PALSAR has an advantage over other remote systems by enabling frequent sensing and semidirect biomass estimation using backscattering coefficients. However, no reasonable remote sensing methods exist for monitoring the amount of carbon loss by forest conversion and logging in forests with high biomass. To compensate for the faults of the present PALSAR methodologies and to enable practical and frequent monitoring of all types of forests by humans, it is vital to devise a new methodology to detect changes in high-biomass forests.


Turjaman M.,Forest and Nature Conservation Research and Development Center | Santoso E.,Forest and Nature Conservation Research and Development Center | Susanto A.,University of Palangka Raya | Gaman S.,University of Palangka Raya | And 4 more authors.
Wetlands Ecology and Management | Year: 2011

Shorea balangeran is an important component of peat swamp forests in Southeast Asia and is an important source of timber. However, S. balangeran has been decreasing in number due to overexploitation. The objective of this study was to investigate the effect of inoculation of native ectomycorrhizal (ECM) fungi on growth of S. balangeran in degraded peat swamp forest. Spores of Boletus sp., Scleroderma sp., and Strobilomyces sp. were collected from natural peat swamp forest in Indonesia. Seedlings of S. balangeran were inoculated with or without (control) spores and grown in sterilized peat soil under nursery conditions for 6 months. Then, the seedlings were transplanted into a degraded peat swamp forest and grown for 40 months. ECM colonization was 59-67% under nursery conditions and increased shoot height and weight. Shoot height, stem diameter, and survival rates were higher in inoculated seedlings than in control 40 months after transplantation. The results suggest that inoculation of native ECM fungi onto native tree species is useful for reforestation of degraded peat swamp forests. © 2011 Springer Science+Business Media B.V.

Discover hidden collaborations