This is the extracted data of the post-logging regeneration of commercial species in forest concessions under sustainable management (FSCM) in Gabon project funded by Sud Expert Plantes Développement Durable program (SEP2D) under the AAP2-81 project code. The main aim of this project was to support logging companies involved in the certification process to monitor forest regeneration relating to Forest Stewardship for the Congo Basin Region (FSC) which recommends the forest manager to set up mechanisms to monitor natural regeneration in the areas impacted by logging according to 6.3.2 indicator. Study was carried in the certified FSCM of the Rougier-Gabon company by the Institut de Recherche en Ecologie Tropicale (IRET). To monitor forest dynamic and trees regeneration of the forest areas impacted by logging, data from 652 plots of 30 m2 established on the skid trails and the 141 others from felling gaps whose sizes vary between 3,8 to 20 m2 was exploited. Skid trails are used for log extraction. Every tree ≥ 1 cm in diameter at breast height (dbh; 1.3 m above ground level) was measured.
The data in this sampling event resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 793 records.
1 extension data tables also exist. An extension record supplies extra information about a core record. The number of records in each extension data table is illustrated below.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
The table below shows only published versions of the resource that are publicly accessible.
How to cite
Researchers should cite this work as follows:
Engone Obiang N L, Mboma R, Mba Nzuè M, Niangadouma R, Menvi Nzomo J, Magama-Mucketou A, Chézeaux É (2023): Forest dynamic and trees regeneration in the logging gaps in Gabon. v1.6. Herbier National du Gabon. Dataset/Samplingevent. https://ipt-gabon.gbif.fr/resource?r=regefor&v=1.6
Researchers should respect the following rights statement:
The publisher and rights holder of this work is Herbier National du Gabon. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
This resource has been registered with GBIF, and assigned the following GBIF UUID: 3eaece88-38a5-4252-9f34-e90b05fdbfba. Herbier National du Gabon publishes this resource, and is itself registered in GBIF as a data publisher endorsed by Participant Node Managers Committee.
Samplingevent; plants; Gabon; post-logging regeneration
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Study was carried out in the certified forest concessions of Rougier-Gabon, especially those of Haut-Abanga, in the northwest (293,833 ha) and Moyabi (188,989 ha), in the southeast of Gabon.
|Bounding Coordinates||South West [-4.171, 8.833], North East [2.416, 14.81]|
These data that come from 793 plots contain 6251 trees including 276 species, 184 genera and 56 families. The both logging gaps are characterized by the similar floristic compositions where the light-demanding taxa as Macaranga, Alcornea, Xylopia, Discoglypremna, Dichostemma and Harungana are more abundants.
|Family||Apocynaceae, Aptandraceae, Asteraceae, Burseraceae, Cannabaceae, Cardiopteridaceae, Centroplacaceae, Chrysobalanaceae, Clusiaceae, Connaraceae, Coulaceae, Dipterocarpaceae, Ebenaceae, Erythroxylaceae, Euphorbiaceae, Fabaceae, Gelsemiaceae, Gentianaceae, Huaceae, Hypericaceae, Irvingiaceae, Ixonanthaceae, Lamiaceae, Lauraceae, Lecythidaceae, Malvaceae, Melastomataceae, Meliaceae, Moraceae, Myristicaceae, Myrtaceae, Ochnaceae, Olacaceae, Pandaceae, Passifloraceae, Peraceae, Phyllanthaceae, Polygalaceae, Putranjivaceae, Rhamnaceae, Rhizophoraceae, Rubiaceae, Rutaceae, Salicaceae, Sapindaceae, Sapotaceae, Simaroubaceae, Stemonuraceae, Strombosiaceae, Thomandersiaceae, Urticaceae, Violaceae, Vochysiaceae|
|Start Date / End Date||2018-06-02 / 2020-09-02|
Specifically, this project aims to fill data gaps through Digitalization of herbarium specimens at the National Herbarium of Gabon (LBV). The images of the scanned specimens will be linked and available online in a database that has already been developed during the previous project. We plan to scan about 2000 herbarium specimens. Categorization of medicinal, cosmetic, endemic and threatened plants using an existing database created during the a previous BID project. Further categorization will improve the database and will greatly accelerate their utilization. Habitat modeling of commercial timber species for their sustainable management in Gabon. This activity will concern the main commercial timber and threatened species. Appropriate communication tools about data to decision-makers such as the production of online checklists of medicinal, endemic and cosmetic plants, and writing policy briefs for policy-makers.
|Title||Mobilization and use of botanical data as decision-making tools in Gabon|
|Funding||JRS Biodiversity Foundation GBIF|
The personnel involved in the project:
To collect data, 652 plots was established on the skid trails and the 141 others in the felling gaps of the two forest concessions, either a total of 793 plots.
|Study Extent||Study was carried in two FSCM of the Rougier-Gabon company, that of Haut-Abanga (288,626 ha), in the northwest and the Moyabi one, in the southeast of Gabon (71,716 ha). Rougier-Gabon was also a project partner.|
|Quality Control||GBIF species matching and BRAHMS database was used for data quality control. After species identification in the field their confirmation was done by the Herbier national du Gabon botanists.|
Method step description:
- In the two FSCM of the Rougier-Gabon company, data come from 652 plots of 30 m2 in the skid trails and the 141 others whose size varies from 3.38 to 20 m2 from felling gaps. The skid trails and the felling gaps are themselves located in the annual areas cutting from 0 to 26 years old. The plots, 100 m apart from center to center, was placed along the skid trails and numbered from 1 to n; 1 being the first plot, adjacent to the road or park and n le last one, inside the forest. The plots of the felling gaps of the same area (20 m2) were successively placed in the axis which connects the stump to the crown. They were also numbered from 1 (first plot after the stump) to n, last plot of variable size X. In the two cases, every tree ≥ 1 cm in diameter at breast height (dbh; 1.3 m above ground level) was measured.
- Brunck, F., Grison, F., & Maitre, H. F. (1990). Okoume (Aucoumea klaineana): a monograph. Okoume (Aucoumea klaineana): a monograph.
- Engone Obiang N.L., Ngomanda A., Hymas O., Chézeaux É. & Picard N. 2014. Diagnosing the demographic balance of two light-demanding tree species populations in central Africa from their diameter distribution. Forest Ecology and Management 313: 55–62.
- Engone Obiang Nestor, Mba Nzuè Martial-T et Niangadouma Raoul – 2019 : Régénération post exploitation des essences commerciales dans les concessions forestières sous aménagement durable au Gabon. Rapport final du projet Sud Expert Plante AAP2-81
- Gravel, D., Canham, C. D., Beaudet, M., & Messier, C. (2010). Shade tolerance, canopy gaps and mechanisms of coexistence of forest trees. Oikos, 119(3), 475-484.
- Poorter, L., & Rose, S. A. (2005). Light-dependent changes in the relationship between seed mass and seedling traits: a meta-analysis for rain forest tree species. Oecologia, 142(3), 378-387. Rougier Gabon, Plan d’aménagement des CAD du Haut Abanga et de Moyabi