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      A new species of Rhaptopetalum (Lecythidaceae) from south-western Gabon

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      Author(s): 1 , 2 , , 3
      Publication date (Electronic):
      Journal: PhytoKeys
      Publisher: Pensoft Publishers
      Keywords: ForestGEO, Gabon, IUCN Red List, new species, permanent plot, Rabi, rainforest, taxonomy

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          Abstract

          Rhaptopetalum rabiense Kenfack & Nguema, sp. nov. from the Rabi forest in south-western Gabon is described, illustrated and assigned a provisional conservation status of “Critically Endangered”. An identification key to the five Gabonese species of Rhaptopetalum is also provided.

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          Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool

          Steven Bachman, Justin Moat, Andrew Hill … (2011)
          Abstract GeoCAT is an open source, browser based tool that performs rapid geospatial analysis to ease the process of Red Listing taxa. Developed to utilise spatially referenced primary occurrence data, the analysis focuses on two aspects of the geographic range of a taxon: the extent of occurrence (EOO) and the area of occupancy (AOO). These metrics form part of the IUCN Red List categories and criteria and have often proved challenging to obtain in an accurate, consistent and repeatable way. Within a familiar Google Maps environment, GeoCAT users can quickly and easily combine data from multiple sources such as GBIF, Flickr and Scratchpads as well as user generated occurrence data. Analysis is done with the click of a button and is visualised instantly, providing an indication of the Red List threat rating, subject to meeting the full requirements of the criteria. Outputs including the results, data and parameters used for analysis are stored in a GeoCAT file that can be easily reloaded or shared with collaborators. GeoCAT is a first step toward automating the data handling process of Red List assessing and provides a valuable hub from which further developments and enhancements can be spawned.
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            Flowering Plants

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              Ecological Importance of Small-Diameter Trees to the Structure, Diversity and Biomass of a Tropical Evergreen Forest at Rabi, Gabon

              Hervé R Memiaghe, James A Lutz, Lisa Korte … (2016)
              Tropical forests have long been recognized for their biodiversity and ecosystem services. Despite their importance, tropical forests, and particularly those of central Africa, remain understudied. Until recently, most forest inventories in Central Africa have focused on trees ≥10 cm in diameter, even though several studies have shown that small-diameter tree population may be important to demographic rates and nutrient cycling. To determine the ecological importance of small-diameter trees in central African forests, we used data from a 25-ha permanent plot that we established in the rainforest of Gabon to study the diversity and dynamics of these forests. Within the plot, we censused 175,830 trees ≥1 cm dbh from 54 families, 192 genera, and 345 species. Average tree density was 7,026 trees/ha, basal area 31.64 m2/ha, and above-ground biomass 369.40 Mg/ha. Fabaceae, Ebenaceae and Euphorbiaceae were the most important families by basal area, density and above-ground biomass. Small-diameter trees (1 cm ≥ dbh <10 cm) comprised 93.7% of the total tree population, 16.5% of basal area, and 4.8% of the above-ground biomass. They also had diversity 18% higher at family level, 34% higher at genus level, and 42% higher at species level than trees ≥10 cm dbh. Although the relative contribution of small-diameter trees to biomass was comparable to other forests globally, their contribution to forest density, and diversity was disproportionately higher. The high levels of diversity within small-diameter classes may give these forests high levels of structural resilience to anthropogenic/natural disturbance and a changing climate.
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                Author and article information

                Contributors
                David Kenfack
                Journal
                Journal ID (nlm-ta): PhytoKeys
                Journal ID (iso-abbrev): PhytoKeys
                Journal ID (publisher-id): 3
                Journal ID (index): urn:lsid:arphahub.com:pub:f7fce910-8e78-573f-9c77-7788555f8aad
                Title: PhytoKeys
                Publisher: Pensoft Publishers
                ISSN (Print): 1314-2011
                ISSN (Electronic): 1314-2003
                Publication date Collection: 2019
                Publication date (Electronic): 23 July 2019
                Volume: 128
                Pages: 39-46
                Affiliations
                [1 ] Forest Global Earth Observatory (ForestGEO), Smithsonian Tropical Research Institute, Apartado Postal 0843-03092, Panamá, República de Panamá Smithsonian Tropical Research Institute Panamá Panama
                [2 ] Physical address: Department of Botany, National Museum of Natural History - MRC 166, P.O. Box 37012, Washington, DC 20013-7012, USA National Museum of Natural History Washington United States of America
                [3 ] Gabon Biodiversity Program, Centre for Conservation and Sustainability, Smithsonian Conservation Biology Institute, BP 48, Gamba, Gabon Smithsonian Conservation Biology Institute Gamba Gabon
                Author notes
                Corresponding author: David Kenfack ( kenfackd@ 123456si.edu )

                Academic editor: Thomas L.P. Couvreur

                Article
                Publisher ID: 34640 Other ID: urn:lsid:arphahub.com:pub:fa90d763-bb94-545c-9f6f-5d2c0ad98a79
                DOI: 10.3897/phytokeys.128.34640
                PMC ID: 6667394
                PubMed ID: 31379455
                SO-VID: 069128a7-f001-4587-b248-b04a416a040d
                License:

                This is an open access article distributed under the terms of the CC0 Public Domain Dedication.

                History
                Date received : 18 March 2019
                Date accepted : 24 May 2019
                Funding
                Funded by: Smithsonian Tropical Research Institute 100009201 http://doi.org/10.13039/100009201
                Categories
                Subject: Research Article
                Subject: Lecythidaceae
                Subject: Taxonomy
                Subject: Africa

                ScienceOpen disciplines: Plant science & Botany
                Keywords: forestgeo,gabon,iucn red list,new species,permanent plot,rabi,rainforest,taxonomy
                Data availability:
                ScienceOpen disciplines: Plant science & Botany
                Keywords: forestgeo, gabon, iucn red list, new species, permanent plot, rabi, rainforest, taxonomy

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