Razakamanarivo, H.; Razafimbelo, T.; Andriamananjara, A.; Rianahary, A.; Razafindrakoto, M.; Harinirina, A.

Site description and location of direct measured trees in the Ankeniheny Zahamena forest corridor, Madagascar

Data comprise location (zone of interest, village name, site code, longitude, latitude, altitude and slope), local tree species name, tree code and tree diameter class of trees selected for direct measurements in the Ankeniheny Zahamena forest corridor, the remains of the evergreen forest of eastern Madagascar.

Data were collected as part of a project funded by the Ecosystem Services for Poverty Alleviation (ESPA) programme under work package 4, P4GES project, grant references: NE/K008692/1, NE/K010115/1, and NE/K010220/1.

Publication date: 2017-03-03

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Supporting documentation

Format of the dataset : Comma-separated values (CSV)

This dataset is made available under the terms of the Open Government Licence

You must cite: Razakamanarivo, H.; Razafimbelo, T.; Andriamananjara, A.; Rianahary, A.; Razafindrakoto, M.; Harinirina, A. (2017). Site description and location of direct measured trees in the Ankeniheny Zahamena forest corridor, Madagascar. NERC Environmental Information Data Centre. https://doi.org/10.5285/a242e145-21f6-4c3c-b8e4-adce70e50d85

 

© Laboratoire des Radio Isotopes, Université d'Antananarivo

Where/When

Study area
Temporal extent
2013-06-01    to    2017-02-28

Supplemental information

Other useful information regarding this dataset:

Chave, J., Réjou-Méchain, M., Búrquez, A., Chidumayo, E., Colgan, M. S., Delitti, W. B. C., … Vieilledent, G. (2014). Improved allometric models to estimate the aboveground biomass of tropical trees. Global Change Biology, 20(10), 3177-3190.

Provenance & quality

A forest inventory was carried out within all sites of closed canopy in the four Zone Of Interest (ZOI). Name of species, DBH, and height (H) were recorded during the forest inventory. In order to have an idea of above-ground biomass (AGB) density, AGB at tree level was estimated by applying the allometric equation developed by Chave et al. 2014 on the inventory data. Indeed, the model developed by Chave et al. was considered because it was the most recent and included the existing national equations. Subsequently, total AGB at stand level (Mg.ha-1) for each site was calculated by summing the AGB values of all trees in the same site and dividing this value by the total survey area (ha) sampled. After, two (2) ZOIs were chosen according to the extreme values of AGB at stand level while considering the ease of access. In fact, ZOI3 has the highest value of AGB; ZOI1 and ZOI2 have very similar AGB values and have been the lowest. Thus, considering the accessibility and the cost of the work, ZOI2 was chosen for the direct measurement.

The selection of sites was based on the AGB values per site in relation to the representativeness of each tree size (proportion of trees per DBH class). In order to establish this relation, AGB per site was divided at three class so that each class has the same number of values (a percentage at around 33% of the total number of sites for each class). The aim is to see for each site, which category of tree (in terms of DBH) contributes the most to its biomass (ABG). Afterwards, consideration of contribution of each tree size into AGB density in Mg.ha-1 per site for each ZOI, at least 3 sites for each ZOI were selected for BGB direct measurements. The choice of sites also takes account of the accessibility, any restriction in field process in relation with this protected area zonage.

Target trees were chosen from the four dominant species sorted out from the forest inventory. Target trees were selected by considering the selection of zone, sites, diameter classes and species. Three categories of trees were considered, trees with DBH≥ 20cm, trees with 10≤DBH<20cm and trees with 5≤DBH<10cm.

Following all these process, in total, 54 target trees were selected for direct measurements of BGB: 2 zones * 3 sites/zone * 3 species per site * 3 diameter class / species.

Correspondence/contact details

Herintsitohaina Razakamanarivo
Laboratoire des Radio Isotopes, Université d'Antananarivo
Route d’Andraisoro
Antananarivo
Madagascar
herintsitohaina.razakamanarivo@gmail.com

Authors

Razakamanarivo, H.
Laboratoire des Radio Isotopes, Université d'Antananarivo
Razafimbelo, T.
Laboratoire des Radio Isotopes, Université d'Antananarivo
Andriamananjara, A.
Laboratoire des Radio Isotopes, Université d'Antananarivo
Rianahary, A.
Laboratoire des Radio Isotopes, Université d'Antananarivo
Razafindrakoto, M.
Laboratoire des Radio Isotopes, Université d'Antananarivo
Harinirina, A.
Laboratoire des Radio Isotopes, Université d'Antananarivo

Other contacts

Custodian
Environmental Information Data Centre
eidc@ceh.ac.uk
Publisher
NERC Environmental Information Data Centre
eidc@ceh.ac.uk

Spatial

Spatial representation type
Tabular (text)
Spatial reference system
EPSG::CRS:84

Tags

Topic categories
Economy , Environment
Keywords
Ankeniheny Zahamena forest Corridor CAZ,  location,  Madagascar tree