Forest Inventory and Planning Institute

Thanh Tri, Vietnam

Forest Inventory and Planning Institute

Thanh Tri, Vietnam

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Le M.,Hanoi University of Science | Nguyen T.V.,Hanoi University of Science | Duong H.T.,Hanoi University of Science | Nguyen H.M.,Center for Natural Resources and Environmental Studies | And 4 more authors.
Conservation Genetics | Year: 2014

Distribution and taxonomic status of the Roosevelt's Barking Deer (Muntiacus rooseveltorum) have remained poorly understood after more than 80 years since its description. All records of this species so far have been reported only from Lao PDR. During recent surveys in central Vietnam, we found several specimens from local hunting trophies morphologically resembling this species. Our molecular data, including both mitochondrial and nuclear genes, based on collected materials confirm for the first time that M. rooseveltorum is distributed in Vietnam. In addition, the phylogenetic analyses demonstrate that the Roosevelt's Barking Deer represents a distinct evolutionary lineage closely related to the Truong Son Muntjac, in central Vietnam, and the Leaf Muntjac in Myanmar. Given the rarity of this species and the escalating hunting and habitat loss in the region, it is important to conduct field research to assess its population status. Such information is critically needed to design a conservation plan for this highly elusive and threatened taxon. © 2014 Springer Science+Business Media Dordrecht.


Gongyu Q.I.,Wuhan University | Qiu W.,Wuhan University | Hua X.,Wuhan University | Chen H.,Forest Inventory and Planning Institute | Liu Z.,Forest Inventory and Planning Institute
Journal of Geomatics | Year: 2010

On the basis of analyzing the relationship of designed area error and boundary error, the equation for calculating boundary error is derived by the area error. Also, the graph shape is analyzed, in the end the most appropriate graphic shape for solving boundary-point error is gained.


Huy B.,Oregon State University | Kralicek K.,Oregon State University | Poudel K.P.,Oregon State University | Phuong V.T.,Vietnamese Academy of Forest science | And 3 more authors.
Forest Ecology and Management | Year: 2016

For mitigating climate change through carbon sequestration and for reporting, Viet Nam needs to develop biomass equations at a national scale. These equations need to be accurate and provide quantifiable uncertainty. Using data from 968 trees across five ecoregions of Viet Nam, we developed a set of models to estimate tree aboveground biomass (AGB) in evergreen broadleaf forests (EBLF) at the national level. Diameter at breast height (DBH), tree height (H), wood density (WD), and combination of these three tree characteristics were used as covariates of the biomass models. Effect of ecoregion, wood density, plant family on AGB were examined. Best models were selected based on AIC, Adjusted R2, and visual interpretation of model diagnostics. Cross-validation statistics of percent bias, root mean square percentage error (RMSPE), and mean absolute percent error (MAPE) were computed by randomly splitting data 200 times into model development (80%) and validation (20%) datasets and averaging over the 200 realizations. Effects models were used, the best results were obtained by using a combined variable (DBH2HWD (kg) = (DBH (cm)/100)2 × H (m) × WD (g/cm3) × 1000) model AGB = a × (DBH2HWD)b. Including a categorical WD variable as a random effect reduced AIC, percent bias, RMSPE, MAPE of models AGB = a × DBHb and AGB = a × (DBH2H)b; ecoregion as a random effect reduced the AIC of models AGB = DBHb × WD, AGB = a × (DBH2H)b, and AGB = a × (DBH2HWD)b. For models that did not include WD variable, including plant family as a random effect reduced AIC, RMSE, and MAPE; recommendations are provided for models with specific parameters for main families and without WD if this variable is not available. The overall best model for estimating AGB was the equation form AGB = a × (DBH2HWD)b with ecoregion as a random effect. © 2016 Elsevier B.V.


Muinonen E.,Finnish Forest Research Institute | Pitkanen J.,Finnish Forest Research Institute | Hung N.P.,Forest Inventory and Planning Institute | Tinh M.V.,Forest Inventory and Planning Institute | Eerikainen K.,Finnish Forest Research Institute
Australian Forestry | Year: 2014

This article presents a processing chain for forest volume mapping based on multi-source forest inventory methodology and the existing inventory data collected from the Kon Tum region, Vietnam. The modelling framework for imputing tally tree heights was built based on a mixed-effects height generalisation model. Mapping of the stem volume was based on nearest neighbour techniques (k-NN) and Landsat TM data after relative calibration with MODIS image material as underlying reference. The use of optical image materials, together with the demanding conditions set by a tropical forest structure, resulted in a moderate root mean square error value (76.6%) for the stem volume. The resulting volume maps, which were based on an objective estimation procedure, create the appropriate model dataset needed for testing the optimal large-scale inventory designs of forthcoming forest inventories that will be carried out in Vietnam. © 2014 Institute of Foresters of Australia (IFA).


Huy B.,Oregon State University | Poudel K.P.,Oregon State University | Kralicek K.,Oregon State University | Hung N.D.,Forest Inventory and Planning Institute | And 3 more authors.
Forests | Year: 2016

There are few allometric equations available for dipterocarp forests, despite the fact that this forest type covers extensive areas in tropical Southeast Asia. This study aims to develop a set of equations to estimate tree aboveground biomass (AGB) in dipterocarp forests in Vietnam and to validate and compare their predictive performance with allometric equations used for dipterocarps in Indonesia and pantropical areas. Diameter at breast height (DBH), total tree height (H), and wood density (WD) were used as input variables of the nonlinear weighted least square models. Akaike information criterion (AIC) and residual plots were used to select the best models; while percent bias, root mean square percentage error, and mean absolute percent error were used to compare their performance to published models. For mixed-species, the best equation was AGB = 0.06203 × DBH2.26430 ×H0.51415 ×WD0.79456. When applied to a random independent validation dataset, the predicted values from the generic equations and the dipterocarp equations in Indonesia overestimated the AGB for different sites, indicating the need for region-specific equations. At the genus level, the selected equations were AGB = 0.03713 × DBH2.73813 and AGB = 0.07483 × DBH2.54496 for two genera, Dipterocarpus and Shorea, respectively, in Vietnam. Compared to the mixed-species equations, the genus-specific equations improved the accuracy of the AGB estimates. Additionally, the genus-specific equations showed no significant differences in predictive performance in different regions (e.g., Indonesia, Vietnam) of Southeast Asia. © 2016 by the authors; licensee MDPI, Basel, Switzerland.


Nguyen T.Q.,Vietnam Academy of Science and Technology | Le M.D.,National American University | Pham A.V.,Tay Bac University | Ngo H.N.,Vietnam Academy of Science and Technology | And 3 more authors.
Zootaxa | Year: 2015

We describe two new species of the genus Cyrtodactylus on the basis of a new reptile collection from the limestone karst forest of Hoa Binh Province, northwestern Vietnam. Cyrtodactylus otai sp. nov.from Hang Kia-Pa Co Nature Reserve and Cyrtodactylus bobrovi sp. nov.from Ngoc Son-Ngo Luong Nature Reserve can be distinguished from each other and from their congeners by their genetic distinction and morphological differences in number of precloacal pores, femoral scales, ventral scales, lamellae, subcaudals and dorsal tubercle arrangement, as well as in size and color pattern. In phylogenetic analyses, both new species are nested in a clade containing taxa from northwestern and northcentral Vietnam and northern Laos, i.e., C. bichnganae and C. cf. martini from northwestern Vietnam, C. puhuensis from northcentral Vietnam, and C. spelaeus, C. vilaphongi, and C. wayakonei from northern Laos. Copyright © 2015 Magnolia Press.


Henderson A.,New York Botanical Garden | Dung N.Q.,Forest Inventory and Planning Institute
Phytotaxa | Year: 2013

Four new species of Calamus (Arecaceae) are described and illustrated and compared with similar species. © 2013 Magnolia Press.


Pham C.T.,Vietnam Academy of Science and Technology | Nguyen T.Q.,Vietnam Academy of Science and Technology | Hoang C.V.,Forest Inventory and Planning Institute | Ziegler T.,AG Zoologischer Garten Cologne
Herpetology Notes | Year: 2016

We record seven amphibian species for the first time from Thanh Hoa Province based on newly collected specimens from Xuan Lien Nature Reserve, comprising four species of Leptolalax, one species of Microhyla, one species of Odorrana and one species of Rhacophorus. In addition, an updated list of 50 species of amphibians for Xuan Lien Nature Reserve is provided, including three globally threatened species and five nationally endangered species. © 2016, Societas Europaea Herpetologica. All rights reserved.


PubMed | AG Zoologischer Garten Cologne, Forest Inventory and Planning Institute, Vietnam Academy of Science and Technology, Tay Bac University and New York University
Type: Journal Article | Journal: Zootaxa | Year: 2015

We describe two new species of the genus Cyrtodactylus on the basis of a new reptile collection from the limestone karst forest of Hoa Binh Province, northwestern Vietnam. Cyrtodactylus otai sp. nov. from Hang Kia-Pa Co Nature Reserve and Cyrtodactylus bobrovi sp. nov. from Ngoc Son-Ngo Luong Nature Reserve can be distinguished from each other and from their congeners by their genetic distinction and morphological differences in number of precloacal pores, femoral scales, ventral scales, lamellae, subcaudals and dorsal tubercle arrangement, as well as in size and color pattern. In phylogenetic analyses, both new species are nested in a clade containing taxa from northwestern and northcentral Vietnam and northern Laos, i.e., C. bichnganae and C. cf. martini from northwestern Vietnam, C. puhuensis from northcentral Vietnam, and C. spelaeus, C. vilaphongi, and C. wayakonei from northern Laos.


Monastyrskii A.L.,Forest Inventory and Planning Institute
Entomological Review | Year: 2015

New insights into butterfly distribution ranges are presented in the context of attempts to analyse faunogenetic processes. The mimetic ranges of models and their mimics are considered for the first time. The geographic patterns of phenotypic similarity between Parantica models and their mimics are demonstrated. It is shown that development of similar specific traits in the models distributed in different geographic areas was accompanied by their mimics acquiring the same traits. Abundance of the phenotypically similar pairs and sympatric butterfly species suggests both migratory evolution scenarios and survival and divergence in refugia during global climate changes. Isolated or overlapping ranges (interactive ranges) in similar species result from their potential or recurrent contacts. The vicariant ranges are considered as conjugated ranges for the first time. The pattern of range substitution shows a connection with the boundaries of biogeographic entities and centers of diversity. © 2015, Pleiades Publishing, Inc.

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