Identification

Title

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

Abstract

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. Full details about this dataset can be found at https://doi.org/10.5285/a242e145-21f6-4c3c-b8e4-adce70e50d85

Resource type

dataset

Resource locator

https://data-package.ceh.ac.uk/data/a242e145-21f6-4c3c-b8e4-adce70e50d85

name: Download the data

description: Download a copy of this data

function: download

https://data-package.ceh.ac.uk/sd/a242e145-21f6-4c3c-b8e4-adce70e50d85.zip

name: Supporting information

description: Supporting information available to assist in re-use of this dataset

function: information

Unique resource identifier

code

https://catalogue.ceh.ac.uk/id/a242e145-21f6-4c3c-b8e4-adce70e50d85

codeSpace

doi:

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

economy

environment

Keywords

Keyword set

keyword value

originating controlled vocabulary

title

GeoNames

reference date

date type

creation

effective date

2006-01-01

Keyword set

keyword value

CAZ

tree

location

Geographic location

West bounding longitude

43.191

East bounding longitude

50.484

North bounding latitude

-11.945

South bounding latitude

-25.69

Temporal reference

Temporal extent

Begin position

2013-06-01

End position

2017-02-28

Dataset reference date

date type

publication

effective date

2017-03-03

Frequency of update

asNeeded

Quality and validity

Lineage

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.

Conformity

Conformity report

specification

title

Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

reference date

date type

publication

effective date

2010-12-08

degree

explanation

Data format

name of format

Comma-separated values (CSV)

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Acknowledgement of the Laboratoire des Radio Isotopes, Université d'Antananarivo is required for products derived from these data

Constraint set

Limitations on public access

If you reuse this data, you should 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

custodian

Metadata on metadata

Metadata point of contact

organisation name

Environmental Information Data Centre

full postal address

Lancaster Environment Centre, Library Avenue, Bailrigg

Lancaster

LA1 4AP

email address

info@eidc.ac.uk

responsible party role

pointOfContact

Metadata date

2022-05-20T10:39:09

Metadata language

eng