Abstract: Eight new records of pteridophytes are listed for the flora of Annobon (Equatorial Guinea). Specimen information is provided for 12 literature-based record in the Flora de Guinea Ecuatorial. An account of pteridophyte collecting on the island is provided. Pteridophyte diversity in Annobon is updated to 49 species.
Abstract: In the small island of Annobon, four vegetation formations conditioned by its vigorous relief can be recognized. Meadows and dry communities occur in the lowest zones of the Northern and Southern tips of the island. A tropical dry forest, which grows over it, is gradually substituted by a tropical wet forest in higher altitudes. A mist forest very rich in epiphytes occurs in the highest island summits. The distribution of these vegetation formations in the island is not symmetric due to the SW trade winds. The plant cover has been deeply transformed by the human presence. The high biological and ecological value of the mist forest, which plays an important hydrological role in the isle, is noteworthy.
Abstract: A further 182 publications concerning with the fauna of three of the four islands in the Gulf of Guinea (Principe, Sao Tome and Annobon) are listed.
Abstract: Data on land snail diversity in the Gulf of Guinea islands is presented and the biogeograpphy of the Gulf of Guinea fauna is discussed with reference to island snail faunas in other areas of the world. Although the land snail faunas of the four islands clearly have west and central African affinities, speciation events following rare colonizations have led to high rates of endemism at the species and generic levels. The influence of island size, altitude, isolation and other factorson the development of the land snail faunas is discussed. The effect of land use changes on the land snail fauna over the last 150 years is evaluated. Current threats include recent changes in agricultural practice leading to the destruction of snail habitats in both forest and plantation areas. The potential threat posed by introduced species is also discussed. The Gulf of Guinea snail faunas appear to be in relatively good health in comparison to many other island snail faunas. However, the uniqueness of the faunas make it imperative that further ecological and taxonomic research is undertaken both to understand the processes by which they developed and to evaluate the current status of many species in terms of distribution and threats.
Abstract: A list of 317 works concerned with the fauna of the Democratic of Sao Tome e Principe and the island of Annobon, Republic of Equatorial Guinea is presented. Most of the papers included refer directly to one of the islands or endemic species from the islands in their titles. However, other works that include significant sections on the islands are included, as well as unpublished papers that contribute useful information.
