Titre: Forest cover changes in Côte d'Ivoire and Upper Guinea Auteur:Chatelain, Cyrille; Dao, Quoc-Hy; Gautier, Laurent; Spichiger, Rodolphe-Edouard Editeur:
Wallingford, CABI Publishing, Wallingford (UK)
Results are given of a study on the changes in forest cover in Côte d'Ivoire from 1990 to 2000 based on satellite images. The changes in forest cover were investigated at 4 scales of resolution. Firstly, the total forest area in West Africa was determined. Then, the total forest cover of Côte d'Ivoire, in particular the total protected area, was analysed. Thirdly, the forest cover in the region of Abidjan was also analysed as an example for the country. Finally, forest fragmentation was investigated in detail for 8 blocks of 20×20 km in Abidjan.
Fait partie de:
Bongers, F., Loorens, P., Kouamé, F. N., Hawthorne, W. D, Biodiversity of West African forests: an ecological atlas of woody plant species, 45-82
Titre: Diversity, distribution and conservation status assessment of Paraguayan palms (Arecaceae) Auteur:Gauto Espinola, Maria Irène; Spichiger, Rodolphe-Edouard; Stauffer, Fred Walter Date:
Open Access - Licence nationale Springer
Indigenous palm species of Paraguay are presented with data on their diversity, distribution, threats and conservation status. The Paraguayan palm flora consists of 23 native species in 11 genera, representing two of the five subfamilies recognized in the group. The palm distribution in the country is strongly related to the different ecoregions present in Paraguay, with number of species by ecoregion being as follow: Cerrado (18), Upper Parana Atlantic forest (6), Wet Chaco (4), Pantanal (2), and Dry Chaco (1). Half of the species display an acaulescent habit reflecting an interesting ecological adaptation to natural fires in the Cerrado. The alarming rate of habitat modification that the country is undergoing since 1940s has put palms under a high risk of extinction in the wild. A GIS model was used to calculate the extent of occurrence and the area of occupancy of the species in order to assess their conservation status applying the IUCN Red List Categories and Criteria. This analysis shows that about 30% of the species are threatened; one species is Critically Endangered, three of them are Endangered, and three are Vulnerable. One species (Acrocomia hassleri) is considered Near Threatened, 13 are Least Concern whereas two species are insufficiently known and therefore unable to be assessed. Important areas for palm conservation in Paraguay were identified, revealing the importance of the Amambay department. Conservation measures for the threatened species identified are proposed.
Fait partie de:
Biodiversity and Conservation, 2011, 20, 12, 2705-2728
Titre: Chloroplast DNA variation and parentage analysis in 55 apples Auteur:Savolainen, Vincent; Corbaz, Roger; Moncousin, Charles; Spichiger, Rodolphe-Edouard; Manen, Jean François Date:
- Non-coding DNA sequence
- DNA polymorphism
- Parentages analysis Description:
The chloroplastic atpB-rbcL spacer and the first 53 codons of the rbcL coding sequence was sequenced for 40 apple cultivars and 15 wild species. This chloroplast DNA region is 904 base pairs long, and only five mutations sites were found among the tested samples. Although the cpDNA variation was low, some parentages are proposed based on the maternal inheritance of plastid DNA: the male and female parents are specified, or else suggested, for Worcester, Discovery, Starking, Starkrimson, Kidd's Orange Red, Priscilla, and Gloster, as well as for the putative wild origin for Malus x domestica.
Fait partie de:
Theoretical and Applied Genetics, 1995, 90, 7-8, 1138-1141
Titre: Floristics of the angiosperm flora of Sub-Saharan Africa : an analysis of the African Plant Checklist and Database Auteur:Klopper, Ronell R.; Gautier, Laurent Vincent; Chatelain, Cyrille; Smith, Gideon F.; Spichiger, Rodolphe-Edouard Date:
The African Plant Checklist and Database Project (APCD) provides botanists with the first angiosperm checklist and database for Sub-Saharan Africa. This was achieved by merging the existing datasets for Southern and Tropical Africa. The checklist is published as a one-off hardcopy publication. The database, with all attached additional information, is freely accessible via the internet and will be regularly updated. The APCD, for the first time, gives accurate statistics for the angiosperm flora of Sub-Saharan Africa. There are 50,136 current taxa (representing approximately 44,830 species) in the database, plus an additional 393 taxa where there are discrepancies in genus concept between the two original datasets. Taxa are classified into 274 families and 3,802 current genera. Several other important statistics can also be drawn from the database. Furthermore, by pointing out problems and discrepancies in taxonomic opinion, the APCD highlights taxa where further research is necessary. The APCD will be an invaluable tool to botanists working on the African flora. It also has an important role to play in greater projects such as the Global Plant Checklist Project and has already emerged as a nomenclatural standard for the African Plants Initiative.
Fait partie de:
Taxon, 2007, 56, 1, 201-208