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Journal articles on the topic 'WEST-CENTRAL TROPICAL AFRICA'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

MASSA, BRUNO. "Orthoptera Tettigoniidae as indicators of biodiversity hotspots in the Guinean Forests of Central and West Tropical Africa." Zootaxa 4974, no. 3 (2021): 401–58. http://dx.doi.org/10.11646/zootaxa.4974.3.1.

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The present paper has two aims: 1) to present the results of the study of selected species of Orthoptera Tettigoniidae collected in the Guinean forests of West Africa and in the important hotspot of Dzanga-Ndoki National Park (Central African Republic); 2) to carry out a check-list of six subfamilies of Tettigoniidae (Pseudophyllinae, Conocephalinae, Hexacentrinae, Phaneropterinae, Mecopodinae and Hetrodinae) living in Central-West tropical Africa, in particular in two main tropical forests, in the subregion of upper Guinea, and in the subregion Nigeria-Cameroon plus the biodiversity hotspots

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Jenkins, G. S., and J. H. Ryu. "Space-borne observations link the tropical Atlantic ozone maximum and paradox to lightning." Atmospheric Chemistry and Physics Discussions 3, no. 6 (2003): 5725–54. http://dx.doi.org/10.5194/acpd-3-5725-2003.

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Abstract. The causes of high tropospheric column ozone values over the Tropical Atlantic Ocean during September, October, and November (SON) are investigated by examining lightning during 1998–2001. The cause for high tropospheric column ozone in the hemisphere opposite of biomass burning (tropical ozone paradox) is also examined. Our results show that lightning is central to high tropospheric column ozone during SON and responsible for the tropical ozone paradox during December, January, and February (DJF) and June, July and August (JJA). During SON large numbers of flashes are observed in So

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Asefi-Najafabady, Salvi, and Sassan Saatchi. "Response of African humid tropical forests to recent rainfall anomalies." Philosophical Transactions of the Royal Society B: Biological Sciences 368, no. 1625 (2013): 20120306. http://dx.doi.org/10.1098/rstb.2012.0306.

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During the last decade, strong negative rainfall anomalies resulting from increased sea surface temperature in the tropical Atlantic have caused extensive droughts in rainforests of western Amazonia, exerting persistent effects on the forest canopy. In contrast, there have been no significant impacts on rainforests of West and Central Africa during the same period, despite large-scale droughts and rainfall anomalies during the same period. Using a combination of rainfall observations from meteorological stations from the Climate Research Unit (CRU; 1950–2009) and satellite observations of the

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Jenkins, G. S., and J. H. Ryu. "Linking horizontal and vertical transports of biomass fire emissions to the Tropical Atlantic Ozone Paradox during the Northern Hemisphere winter season: climatology." Atmospheric Chemistry and Physics Discussions 3, no. 5 (2003): 5061–98. http://dx.doi.org/10.5194/acpd-3-5061-2003.

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Abstract. During the Northern hemisphere winter season, biomass burning is widespread in West Africa, yet the total tropospheric column ozone values (<30 DU) over much of the Tropical Atlantic Ocean (15° N–5° S) are relatively low. At the same time, the tropospheric column ozone values in the Southern Tropical Atlantic are higher than those in the Northern Hemisphere (ozone paradox). We examine the causes for low tropospheric column ozone values by considering the horizontal and vertical transport of biomass fire emissions in West Africa during November through March, using observed data wh

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Jenkins, G. S., and J. H. Ryu. "Linking horizontal and vertical transports of biomass fire emissionsto the tropical Atlantic ozone paradox during the Northern Hemisphere winter season: climatology." Atmospheric Chemistry and Physics 4, no. 2 (2004): 449–69. http://dx.doi.org/10.5194/acp-4-449-2004.

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Abstract. During the Northern hemisphere winter season, biomass burning is widespread in West Africa, yet the total tropospheric column ozone values (<30DU) over much of the Tropical Atlantic Ocean (15°N-5°S) are relatively low. At the same time, the tropospheric column ozone values in the Southern Tropical Atlantic are higher than those in the Northern Hemisphere (ozone paradox). We examine the causes for low tropospheric column ozone values by considering the horizontal and vertical transport of biomass fire emissions in West Africa during November through March, using observed data which

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FULLER, T. L., M. F. DUCATEZ, K. Y. NJABO, et al. "Avian influenza surveillance in Central and West Africa, 2010–2014." Epidemiology and Infection 143, no. 10 (2014): 2205–12. http://dx.doi.org/10.1017/s0950268814003586.

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SUMMARYAvian influenza virus (AIV) is an important zoonotic pathogen, resulting in global human morbidity and mortality and substantial economic losses to the poultry industry. Poultry and wild birds have transmitted AIV to humans, most frequently subtypes H5 and H7, but also different strains and subtypes of H6, H9, and H10. Determining which birds are AIV reservoirs can help identify human populations that have a high risk of infection with these viruses due to occupational or recreational exposure to the reservoir species. To assess the prevalence of AIV in tropical birds, from 2010 to 2014

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7

Janicot, S. "Impact of warm ENSO events on atmospheric circulation and convection over the tropical Atlantic and West Africa." Annales Geophysicae 15, no. 4 (1997): 471–75. http://dx.doi.org/10.1007/s00585-997-0471-x.

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Abstract. Empirical studies have shown that warm El Nino/Southern Oscillation (ENSO) episodes are associated during northern summer with, first, a southward location of the intertropical convergence zone (ITCZ) over the tropical Atlantic, and, second, a weakened convection over West Africa where the ITCZ is near its mean latitude. A modelling experiment presented here is used to help explain this apparent contradiction. In simulated ENSO conditions, the ITCZ is located southwards over the tropical Atlantic. Over West Africa the intertropical front is also displaced southwards, but more slightl

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Cribb, P. J., and I. la Croix. "New Polystachya Species (Orchidaceae) from Tropical West and South-Central Africa." Kew Bulletin 51, no. 3 (1996): 571. http://dx.doi.org/10.2307/4117036.

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Sukhorukov, Alexander, Maria Kushunina, and Filip Verloove. "Notes on Atriplex, Oxybasis and Dysphania (Chenopodiaceae) in West-Central Tropical Africa." Plant Ecology and Evolution 149, no. (2) (2016): 249–56. https://doi.org/10.5091/plecevo.2016.1181.

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<b>Background and aims</b> – The indigenous representatives of Chenopodiaceae in tropical Africa are still insufficiently studied. Some genera, especially <i>Atriplex</i> L., <i>Oxybasis</i> Kar. & Kir. and <i>Dysphania</i> R.Br. (subfam. Chenopodioideae), are difficult to diagnose and are often confused with other native or alien taxa.<b>Methods</b> – The morphological characters of <i>Atriplex, Oxybasis</i> and <i>Dysphania</i> were reviewed using specimens from the herbaria B, BM, BR, BRLU, E, G, K, LE, MHA, MW, P, and W.<b>Key results</b> – A new species <i>Atriplex congolensis</i> Suk

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10

Mekonnen, Ademe, Chris D. Thorncroft, and Anantha R. Aiyyer. "Analysis of Convection and Its Association with African Easterly Waves." Journal of Climate 19, no. 20 (2006): 5405–21. http://dx.doi.org/10.1175/jcli3920.1.

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Abstract The association between convection and African easterly wave (AEW) activity over tropical Africa and the tropical Atlantic during the boreal summer is examined using satellite brightness temperature (TB) and ECMWF reanalysis datasets. Spectral analysis using 18 yr of TB data shows significant variance in the 2–6-day range across most of the region. Within the regions of deep convection, this time scale accounts for about 25%–35% of the total variance. The 2–6-day convective variance has similar amplitudes over western and eastern Africa, while dynamic measures of AEW activity show str

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Massa, Bruno. "Orthoptera Tettigoniidae as indicators of biodiversity hotspots in the Guinean Forests of Central and West Tropical Africa." Zootaxa 4974, no. 3 (2021): 401–58. https://doi.org/10.11646/zootaxa.4974.3.1.

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Massa, Bruno (2021): Orthoptera Tettigoniidae as indicators of biodiversity hotspots in the Guinean Forests of Central and West Tropical Africa. Zootaxa 4974 (3): 401-458, DOI: 10.11646/zootaxa.4974.3.1

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Jabbour, Florian, and Stefan Dressler. "Neotypification of Delphinium dasycaulon (Ranunculaceae)." Phytotaxa 231, no. 2 (2015): 197. http://dx.doi.org/10.11646/phytotaxa.231.2.10.

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The afromontane species Delphinium dasycaulon Fresenius (1837: 272) is one of the three species of Delphinium Linnaeus (1753: 530) (Ranunculaceae) distributed in tropical Africa. This perennial plant has a disjunct distribution, with isolated populations in East Africa (from Djibouti and Eritrea in the North to Malawi and Zambia in the South) and West Africa (Cameroon and Nigeria) (Milne-Redhead & Turrill 1952). Interestingly, no specimen has ever been collected in the central part of the East African Rift region (Kenya and Uganda), where the two other afromontane species of the genus occu

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Da Silva, Carlos Marques, Bernard Landau, and Rafael La Perna. "Biogeography of Iberian Atlantic Neogene marginelliform gastropods (Marginellidae, Cystiscidae): global change and transatlantic colonization." Journal of Paleontology 85, no. 6 (2011): 1052–66. http://dx.doi.org/10.1666/11-104.1.

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The Marginellidae Fleming and the Cystiscidae Stimpson, herein collectively referred to as marginelliform gastropods, are convergent families of thermophilic marine gastropods. Shallow-water marginelliform gastropods are found in the Ibero-Moroccan Gulf and Mediterranean, diversity rapidly increasing towards tropical West Africa. Surprisingly, in the tropical and subtropical European Miocene fossil record, marginelliform genera of tropical affinity such asPersiculaSchumacher andPrunumHerrmannsen, occurring today in West Africa, are altogether missing. Others, such asMarginellaLamarck, are pres

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Stévart, T., G. Dauby, P. P. Lowry, et al. "A third of the tropical African flora is potentially threatened with extinction." Science Advances 5, no. 11 (2019): eaax9444. http://dx.doi.org/10.1126/sciadv.aax9444.

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Preserving tropical biodiversity is an urgent challenge when faced with the growing needs of countries. Despite their crucial importance for terrestrial ecosystems, most tropical plant species lack extinction risk assessments, limiting our ability to identify conservation priorities. Using a novel approach aligned with IUCN Red List criteria, we conducted a continental-scale preliminary conservation assessment of 22,036 vascular plant species in tropical Africa. Our results underline the high level of extinction risk of the tropical African flora. Thirty-three percent of the species are potent

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VERLOOVE, FILIP, JANE BROWNING, and ATTILA MESTERHÁZY. "Pycreus rubidomontanus (Cyperaceae), a widespread but undescribed species from tropical West Africa." Phytotaxa 405, no. 2 (2019): 83. http://dx.doi.org/10.11646/phytotaxa.405.2.3.

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Pycreus rubidomontanus is described as a new species. It is relatively widespread in tropical West Africa where it had been confused up to present with P. atrorubidus, a very rare endemic species from Zambia in south-central Africa that probably is known only from the type gathering. Differences between these and other similar species are discussed and the new species is copiously illustrated.

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Jenkins, G. S., and J. H. Ryu. "Space-borne observations link the tropical atlantic ozone maximum and paradox to lightning." Atmospheric Chemistry and Physics 4, no. 2 (2004): 361–75. http://dx.doi.org/10.5194/acp-4-361-2004.

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Abstract. The potential enhancement of tropospheric column ozone values over the Tropical Atlantic Ocean on a seasonal basis by lightning is investigated using satellite derived ozone data, TRMM lightning data, ozonesonde data and NCEP reanalysis during 1998-2001. Our results show that the number of lightning flashes in Africa and South America reach a maximum during September, October and November (SON). The spatial patterns of winds in combination with lightning from West Africa, Central Africa and South America is likely responsible for enriching middle/upper troposphere ozone over the Trop

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Cumberlidge, Neil, David Rollinson, Jozef Vercruysse, Louis-Albert Tchuem Tchuenté, Bonnie Webster, and Paul F. Clark. "Paragonimusand paragonimiasis in West and Central Africa: unresolved questions." Parasitology 145, no. 13 (2018): 1748–57. http://dx.doi.org/10.1017/s0031182018001439.

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AbstractParagonimiasis, human lung fluke disease, is a foodborne anthropozoonosis caused by the trematodes assigned toParagonimusand is regarded by the World Health Organization as a Neglected Tropical Disease (NTD). The life cycle of this medically important parasite centres on a complex freshwater biological community that includes two intermediate hosts: a mollusc and a decapod, usually a brachyuran. Although there is a perception that the biology, symptoms, diagnosis and treatment ofParagonimusis well understood, in reality, this is not the case, especially in Africa. Much remains unknown

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Sukhorukov, Alexander, Maria Kushunina, and Filip Verloove. "Notes on Atriplex, Oxybasis and Dysphania (Chenopodiaceae) in West-Central Tropical Africa." Plant Ecology and Evolution 149, no. 2 (2016): 249–56. http://dx.doi.org/10.5091/plecevo.2016.1181.

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Haran, Julien, Raphael François Xavier Ndzana Abanda, Laure Benoit, Claude Bakoumé, and Laurence Beaudoin-Ollivier. "Multilocus phylogeography of the world populations of Elaeidobius kamerunicus (Coleoptera, Curculionidae), pollinator of the palm Elaeis guineensis." Bulletin of Entomological Research 110, no. 5 (2020): 654–62. http://dx.doi.org/10.1017/s0007485320000218.

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AbstractElaeidobius kamerunicus Faust (Coleoptera, Curculionidae) is one of the specific pollinators on inflorescences of the African oil palm Elaeis guineensis Jacquin. This derelomine weevil is native to tropical Africa. During the late 20th century, it was introduced into all tropical regions where E. guineensis is grown, in order to improve its pollination and fruit set. Despite an overall success, a decline in pollination efficiency has been documented in several regions. In this study, we reconstructed a multilocus phylogeography of the world populations of E. kamerunicus, in order to ex

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WÜSTER, WOLFGANG, LAURENT CHIRIO, JEAN-FRANÇOIS TRAPE, et al. "Integration of nuclear and mitochondrial gene sequences and morphology reveals unexpected diversity in the forest cobra (Naja melanoleuca) species complex in Central and West Africa (Serpentes: Elapidae)." Zootaxa 4455, no. 1 (2018): 68. http://dx.doi.org/10.11646/zootaxa.4455.1.3.

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Cobras are among the most widely known venomous snakes, and yet their taxonomy remains incompletely understood, particularly in Africa. Here, we use a combination of mitochondrial and nuclear gene sequences and morphological data to diagnose species limits within the African forest cobra, Naja (Boulengerina) melanoleuca. Mitochondrial DNA sequences reveal deep divergences within this taxon. Congruent patterns of variation in mtDNA, nuclear genes and morphology support the recognition of five separate species, confirming the species status of N. subfulva and N. peroescobari, and revealing two p

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CROP, ESKE DE, KOBEKE VAN DE PUTTE, SERGE DE WILDE, ANDRÉ-LEDOUX NJOUONKOU, ANDRÉ DE KESEL, and ANNEMIEKE VERBEKEN. "Lactifluus foetens and Lf. albomembranaceus sp. nov. (Russulaceae): look-alike milkcaps from gallery forests in tropical Africa." Phytotaxa 277, no. 2 (2016): 159. http://dx.doi.org/10.11646/phytotaxa.277.2.3.

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The ectomycorrhizal milkcap genus Lactifluus is commonly found within Central and West African gallery forests. During field expeditions in Cameroon and Togo, several collections of white Lactifluus species were found, resembling Lactifluus foetens. Molecular and morphological research indicates that these collections belong to two unrelated species, i.e. Lactifluus foetens and an undescribed taxon. The latter is here described as Lactifluus albomembranaceus sp. nov. from the gallery forests in Central and Western Africa. In Cameroon, at least, Lactifluus albomembranaceus is a popular edible f

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Laing, Arlene G., Stanley B. Trier, and Christopher A. Davis. "Numerical Simulation of Episodes of Organized Convection in Tropical Northern Africa." Monthly Weather Review 140, no. 9 (2012): 2874–86. http://dx.doi.org/10.1175/mwr-d-11-00330.1.

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Abstract A large-domain convection-permitting numerical model is used to simulate episodes of deep convection, which are generated during the day over the Ethiopian Highlands and then propagate westward over the eastern and central Sahel region (5°–20°N) of northern Africa. The simulation comprises 12.5 days within the African Monsoon Multidisciplinary Analysis (AMMA) field campaign in 2006. During this period, long-lived precipitation episodes that survived beyond a single diurnal cycle occurred in the lee of the Ethiopian Highlands only every 2–3 days in both the simulation and observations.

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COCQUYT, CHRISTINE, and EDIT LOKELE NDJOMBO. "Description of two new Geissleria species (Bacillariophyta) from Central and West tropical Africa." Phytotaxa 402, no. 5 (2019): 241. http://dx.doi.org/10.11646/phytotaxa.402.5.3.

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During a recently started-up project in the Biosphere Reserve at Yangambi, DR Congo, an unknown Geissleria taxon was observed in a small tributary of the Congo River. This taxon is here described as new to science based on detailed light and scanning electron microscopy observations. Geissleria lubiluensis sp. nov. can be distinguished by the slightly tri-undulate valve margins and the very distinct annulus located at a distance of 3 striae from the apex. The comparison of this taxon with various other Geissleria taxa with resembling valve outline or with resembling annulus structure, led to t

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Antunes, Francisco, Rita Cordeiro, and Ana Virgolino. "Monkeypox: From A Neglected Tropical Disease to a Public Health Threat." Infectious Disease Reports 14, no. 5 (2022): 772–83. http://dx.doi.org/10.3390/idr14050079.

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Since the first case of human monkeypox was diagnosed in 1970, the disease remained endemic in several countries in West and Central Africa. In 1996, there was a sudden increase in cases in the Democratic Republic of Congo (DRC), and since 2017 an ongoing outbreak in Nigeria took place, probably related to the population growth, human invasion of MPXV animal habitat reservoirs, and the waning of the cross-protection offered from smallpox immunization, later ending in 1980. Since May 2022, an unprecedented outbreak of human monkeypox has rapidly spread around the world, outside endemic regions

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Descourvières, Pascal, João N. M. Farminhão, Vincent Droissart Jean-Yves Dubuisson, Murielle Simo-Droissart, and Tariq Stévart. "A new genus of angraecoid orchids (Orchidaceae: Angraecinae) with highly distinctive pollinaria morphology, including three new species from tropical West and Central Africa." Phytotaxa 373, no. 2 (2018): 99–120. https://doi.org/10.11646/phytotaxa.373.2.1.

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Descourvières, Pascal, Farminhão, João N. M., Dubuisson, Vincent Droissart Jean-Yves, Simo-Droissart, Murielle, Stévart, Tariq (2018): A new genus of angraecoid orchids (Orchidaceae: Angraecinae) with highly distinctive pollinaria morphology, including three new species from tropical West and Central Africa. Phytotaxa 373 (2): 99-120, DOI: 10.11646/phytotaxa.373.2.1, URL: http://dx.doi.org/10.11646/phytotaxa.373.2.1

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Tenkouano, Abdou, Niéyidouba Lamien, Josephine Agogbua, et al. "Promising High-Yielding Tetraploid Plantain-Bred Hybrids in West Africa." International Journal of Agronomy 2019 (April 21, 2019): 1–8. http://dx.doi.org/10.1155/2019/3873198.

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The devastating threat of black leaf streak disease caused by Pseudocercospora fijiensis on plantain production in West Africa spurred the development of resistant hybrids. The goal of this research and development (R&D) undertaken was assessing the development and dissemination of two plantain hybrids PITA 3 and FHIA 21 bred in the 1980s by the International Institute of Tropical Agriculture (IITA, Nigeria) and the Fundación Hondureña de Investigación Agrícola (FHIA, Honduras), respectively. In Côte d’Ivoire, plantain growers selected PITA 3 and FHIA 21 based on their improved agronomic c

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Berry, Gareth J., and Chris Thorncroft. "Case Study of an Intense African Easterly Wave." Monthly Weather Review 133, no. 4 (2005): 752–66. http://dx.doi.org/10.1175/mwr2884.1.

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The life cycle of an intense African easterly wave (AEW) over the African continent is examined using European Centre for Medium-Range Weather Forecasts (ECMWF) operational analyses, Meteosat satellite images, and synoptic observations. This system, the strongest AEW of 2000, can be tracked from central North Africa into the eastern Atlantic Ocean, where it is associated with the genesis of Hurricane Alberto. Synoptic analysis of the kinematic and thermodynamic fields is supplemented by analysis of potential vorticity (PV), allowing exploration at the role of multiple scales in the evolution o

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Williams, J. E., M. P. Scheele, P. F. J. van Velthoven, et al. "The influence of biomass burning and transport on tropospheric composition over the tropical Atlantic Ocean and Equatorial Africa during the West African monsoon in 2006." Atmospheric Chemistry and Physics 10, no. 20 (2010): 9797–817. http://dx.doi.org/10.5194/acp-10-9797-2010.

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Abstract. Biomass burning (BB) in southern Africa is the largest emission source of CO and O3 precursors within Africa during the West African Monsoon (WAM) between June and August. The long range transport and chemical processing of such emissions thus has the potential to exert a dominant influence on the composition of the tropical troposphere over Equatorial Africa (EA) and the Tropical Atlantic Ocean (TAO). We have performed simulations using a three-dimensional global chemistry-transport model (CTM) to quantify the effect that continental transport of such BB plumes has on the EA region.

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Brée, Baptiste, Andrew J. Helmstetter, Kévin Bethune, Jean-Paul Ghogue, Bonaventure Sonké, and Thomas L. P. Couvreur. "Diversification of African Rainforest Restricted Clades: Piptostigmateae and Annickieae (Annonaceae)." Diversity 12, no. 6 (2020): 227. http://dx.doi.org/10.3390/d12060227.

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African rainforests (ARFs) are species rich and occur in two main rainforest blocks: West/Central and East Africa. This diversity is suggested to be the result of recent diversification, high extinction rates and multiple vicariance events between west/central and East African forests. We reconstructed the diversification history of two subtribes (Annickieae and Piptostigmateae) from the ecologically dominant and diverse tropical rainforest plant family Annonaceae. Both tribes contain endemic taxa in the rainforests of West/Central and East Africa. Using a dated molecular phylogeny based on 32

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KUMAR, ANAND, and KUMAR AVINASH BHARATI. "Second-step lectotypification of Fimbristylis alboviridis (Cyperaceae)." Phytotaxa 442, no. 1 (2020): 41–42. http://dx.doi.org/10.11646/phytotaxa.442.1.7.

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Fimbristylis alboviridis C.B. Clarke (1893: 638) was described based on the collections of Griffith, Hooker and Jenkins from East Bengal, River Megna and Upper Assam, respectively. The species is mainly distributed in West & West Central tropical Africa, tropical Asia, Indo-China and Malesia (Govaerts et al. 2020). In India, it is confined to Andhra Pradesh, Assam, Bihar, Goa, Karnataka, Madhya Pradesh, Maharashtra, Meghalaya and Uttar Pradesh (Patil & Prasad 2009, Anitha 2011, Prasad 2017, Kumar et al. 2017). The species is often confused with F. dichotoma (Linnaeus 1753: 50) Vahl (18

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Nganou, Blaise K., Jubie Selvaraj, Pierre Tane, et al. "A Review on Adenocarpus mannii; a Main Species of the Genus Adenocarpus." Current Traditional Medicine 6, no. 1 (2020): 3–12. http://dx.doi.org/10.2174/2215083805666190708153634.

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: The fabaceae are rooted in rosaceae pods known as "vegetables" by the early botanists. They are the third family of angiosperms which includes 642 genus divided into about 18,000 species. The fabaceae family is known as the most important family of the ecosystem as it is indispensable in medicine, agriculture, industry and livestock. The Adenocarpus genus has about 50 species that are frequently found in tropical regions of Northern Africa, the southern part of West Europe and in the central and southern Italy. They are used in traditional medicine for the treatment of several diseases: such

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Bell, Gerald D., and Muthuvel Chelliah. "Leading Tropical Modes Associated with Interannual and Multidecadal Fluctuations in North Atlantic Hurricane Activity." Journal of Climate 19, no. 4 (2006): 590–612. http://dx.doi.org/10.1175/jcli3659.1.

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Abstract Interannual and multidecadal extremes in Atlantic hurricane activity are shown to result from a coherent and interrelated set of atmospheric and oceanic conditions associated with three leading modes of climate variability in the Tropics. All three modes are related to fluctuations in tropical convection, with two representing the leading multidecadal modes of convective rainfall variability, and one representing the leading interannual mode (ENSO). The tropical multidecadal modes are shown to link known fluctuations in Atlantic hurricane activity, West African monsoon rainfall, and A

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Mboumba, Jean-François, and Véronique Guyot. "Contribution of small rodent communities (Muridae) to the history of West Central African savannas (case of Gabonese savannas): diversity, biogeographic affinities, phylogeography and paleoenvironmental analyses." International Journal of Biological and Chemical Sciences 17, no. 3 (2023): 920–34. http://dx.doi.org/10.4314/ijbcs.v17i3.13.

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Savannas of West Central Africa stand around or inside the large rainforest block. They result from paleo-climatic fluctuations, but the details of their history remain poorly known. The aim of the present study is to explain the present distribution of savannas in West Central Africa, considering the two classic anthropic or paleoclimatic hypotheses about their origin. The study was focused on Gabonese savannas and based on small terrestrial mammal patterns. The phylogeography of small species of strictly savanicolous rodents was compared using nested clade analysis of haplotype networks base

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Lachenaud, Olivier, George Schatz, Gilles Dauby, and Tariq Stévart. "Two new species of Diospyros (Ebenaceae) from Central Africa." Plant Ecology and Evolution 150, no. (2) (2017): 217–24. https://doi.org/10.5091/plecevo.2017.1305.

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<b>Background and aims</b> – <i> Diospyros</i> (Ebenaceae), a large genus with a mostly tropical distribution, includes 736 species worldwide, 104 of which occur in continental Africa. During recent field work in west-central Gabon, two new species of <i> Diospyros</i> were collected. They are described and illustrated here, and compared with their most similar relatives. Preliminary conservation status assessments are also provided.<b>Methods</b> – Normal practices of herbarium taxonomy were applied to study all available herbarium material, mainly from BR, BRLU, LBV, MO, P and WAG. The conse

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Massa, Bruno. "Revision of the Afrotropical genus Leiodontocercus (Orthoptera, Tettigoniidae, Phaneropterinae) with a description of four new species." ZooKeys 951 (July 22, 2020): 47–65. http://dx.doi.org/10.3897/zookeys.951.53814.

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Specimens belonging to the genus Leiodontocercus are rare or even absent in natural history museum collections; this is likely due to at least two reasons, notably, their relatively small size, and, the sheer difficulty in finding them in dense Afrotropical forests. Until recently, three species from less than fifteen specimens were known from this genus, whose identification relied on a singular diagnostic character, that is, the shape of the male cerci. The present contribution is based on the examination of thirty specimens collected from various countries, ranging from central to west Afri

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Villacorta Linaza, Rocio, Timothy Garner, and Chantelle Genovezos. "Building supply chain capacity for neglected tropical diseases: experience from the Ascend West and Central Africa programme." Transactions of The Royal Society of Tropical Medicine and Hygiene 115, no. 8 (2021): 841–46. http://dx.doi.org/10.1093/trstmh/trab068.

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Abstract The Ascend West and Central Africa programme, funded by the UK Foreign, Commonwealth and Development Office (FCDO) is supporting integrated preventative chemotherapy for up to five neglected tropical diseases (NTDs), including intestinal worms, lymphatic filariasis, river blindness, trachoma and schistosomiasis. The programme is implemented across 13 countries by a consortium of four leading international development partners: Sightsavers, Liverpool School of Tropical Medicine, Schistosomiasis Control Initiative Foundation and Mott Macdonald. This paper presents messages learnt from c

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Kasarla, Rajeshwar Reddy. "Human Monkeypox: An Emerging and Neglected Viral Zoonosis of Public Health Concern." Journal of Universal College of Medical Sciences 10, no. 01 (2022): 1–3. http://dx.doi.org/10.3126/jucms.v10i01.47113.

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The world has witnessed several emerging and re-emerging infectious diseases. The recent COVID-19 pandemic is one of the biggest incidents that happened in human history. The war against COVID-19 is not over yet, and the sudden and unexpected outbreak of monkey pox has begun to invoke panic worldwide. Monkeypox is a rare viral zoonotic disease that occurs primarily in tropical rainforest areas of central and West Africa.

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Hall, David W., and David T. Patterson. "Itchgrass–Stop the Trains?" Weed Technology 6, no. 1 (1992): 239–41. http://dx.doi.org/10.1017/s0890037x00034631.

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Itchgrass [Rottboellia cochinchinensis(Lour.) Clayton ♯ ROOEX] is a large aggressive annual in the Poaceae. This weedy grass is native to Southeast Asia. It now occurs also in tropical and subtropical areas of Australia and Africa and has been introduced into the West Indies and North, Central, and South America. It apparently was introduced into the United States at Miami, Fla. and Lafayette, La. in the early 1900s (1, 6, 7).

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Sauvage, B., V. Thouret, J. P. Cammas, F. Gheusi, G. Athier, and P. Nédélec. "Tropospheric ozone over Equatorial Africa: regional aspects from the MOZAIC data." Atmospheric Chemistry and Physics Discussions 4, no. 3 (2004): 3285–332. http://dx.doi.org/10.5194/acpd-4-3285-2004.

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Abstract. We analyze MOZAIC ozone observations recorded over Equatorial Africa, from April 1997 to March 2003 to give the first ozone climatology of this region. The monthly mean vertical profiles have been systematically analyzed with monthly mean ECMWF data using a Lagrangian-model (LAGRANTO). We assess the roles played by the dynamical features of Equatorial Africa and the intense biomass burning sources within the region in defining the ozone distribution. The lower troposphere exhibits layers of enhanced ozone during the biomass burning season in each hemisphere (boreal winter in the nort

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Petrozzi, Fabio, Stephanie N. Ajong, Nic Pacini, et al. "Spatial Niche Expansion at Multiple Habitat Scales of a Tropical Freshwater Turtle in the Absence of a Potential Competitor." Diversity 13, no. 2 (2021): 55. http://dx.doi.org/10.3390/d13020055.

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Resource partitioning, the division of limited resources by species to help avoid competition, has been observed in freshwater turtle assemblages in several natural systems but has rarely been studied in tropical African ecosystems. Here, we investigate habitat preferences of two congeneric species in the family Pelomedusidae, Pelusios castaneus and P. cupulatta, in riverine/wetland habitats in the southern Ivory Coast (West Africa). Pelusios castaneus is a widespread species across West-central African savannahs and open forests, whereas P. cupulatta is endemic to the Upper Guinean forest reg

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Alahacoon, Niranga, Mahesh Edirisinghe, Matamyo Simwanda, ENC Perera, Vincent R. Nyirenda, and Manjula Ranagalage. "Rainfall Variability and Trends over the African Continent Using TAMSAT Data (1983–2020): Towards Climate Change Resilience and Adaptation." Remote Sensing 14, no. 1 (2021): 96. http://dx.doi.org/10.3390/rs14010096.

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This study reveals rainfall variability and trends in the African continent using TAMSAT data from 1983 to 2020. In the study, a Mann–Kendall (MK) test and Sen’s slope estimator were used to analyze rainfall trends and their magnitude, respectively, under monthly, seasonal, and annual timeframes as an indication of climate change using different natural and geographical contexts (i.e., sub-regions, climate zones, major river basins, and countries). The study finds that the highest annual rainfall trends were recorded in Rwanda (11.97 mm/year), the Gulf of Guinea (river basin 8.71 mm/year), the

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KASCHULA, SARAH A., and CHARLIE M. SHACKLETON. "Quantity and significance of wild meat off-take by a rural community in the Eastern Cape, South Africa." Environmental Conservation 36, no. 3 (2009): 192–200. http://dx.doi.org/10.1017/s0376892909990282.

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SUMMARYWhen compared to tropical forest zones in west and central Africa, off-take of wild meat from savannah and grassland biomes by local rural communities has not been well assessed. This case study of wild meat collection activities within a rural community in the Mount Frere region of the Eastern Cape (South Africa) uses last-catch records derived from 50 wild meat gatherers to calculate average off-take of taxa, species and fresh mass of wild meat per collection event. When per-event off take is overlaid onto household hunting frequency data, annual off-take would be 268.6 kg km−2 yr−1 o

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Lissambou, Brandet-Junior, Olivier J. Hardy, Christiane Atteke, et al. "Taxonomic revision of the African genus Greenwayodendron (Annonaceae)." PhytoKeys 114 (December 31, 2018): 55–93. http://dx.doi.org/10.3897/phytokeys.114.27395.

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Greenwayodendron (Annonaceae) is a tropical African genus of trees occurring mainly in rain forests. Until recently, Greenwayodendron contained only two species: Greenwayodendronoliveri from West Africa and Greenwayodendronsuaveolens from Central and East Africa. Genetic data, using chloroplast haplotypes and nuclear microsatellites as well as morphometric analyses, provided important information on the delineation of species. Greenwayodendron now contains six species, including two new species (Greenwayodendronglabrum Lissambou, Hardy &amp; Couvreur, sp. nov. and Greenwayodendronlittorale

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Gedil, Melaku, Wende Mengesha, Oluyinka Ilesanmi, and Abebe Menkir. "Advances in Genetic Enhancement of Nutritional Quality of Tropical Maize in West and Central Africa." Agriculture 14, no. 4 (2024): 577. http://dx.doi.org/10.3390/agriculture14040577.

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Micron3 nutrient deficiencies are pervasive in the diets of millions of people in developing countries, calling for effective mitigation measures. The development of biofortified cultivars through breeding holds promise for sustainable and affordable solutions to combat micronutrient deficiencies. Breeding efforts in the past decade have resulted in dozens of biofortified open-pollinated varieties and hybrids adapted to diverse agroecological zones. Advances in genomics and molecular tools enabled rapid identification of maize cultivars enriched with essential micronutrients such as pro vitami

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Chinouya, Martha Judith, and Sarah Lewis-Newton. "“Boys and Men”: The Making of Senegambian and Congolese Masculinity and Identities in Tropical Africa: A Reflection." Genealogy 9, no. 1 (2025): 10. https://doi.org/10.3390/genealogy9010010.

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Our paper focuses on two white pioneering scientists, Dr Dutton, who was English, and Dr Todd, a Canadian, employed by the Liverpool School of Tropical Medicine (LSTM) to study sleeping sickness in colonial Senegambia, West Africa. We analysed photographs and some published personal letters to help us reflect on some of their constructions of Senegambian and Congolese male identities in tropical colonial Africa. In this paper, we connect with the history of tropical medicine, a precursor to public health. Public health was a research area that was central to Peter Aspinall’s work as he argued

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Oumarou, Ngoute Charly, and C. H. F. Rowell. "Review of the African genus Digentia Stål, 1878 (Orthoptera, Acrididae, Oxyinae)." Journal of Orthoptera Research 34, no. (1) (2025): 11–30. https://doi.org/10.3897/jor.34.126949.

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The genus <i>Digentia</i> Stål, 1878 currently has four described species from the tropical forest areas of West Central Africa. Here, we describe a new species, <i>Digentia viridissima</i> sp. nov., and its natural habitat in the swamps of the humid forests of southern Cameroon. Additionally, we include a description of <i>Digentia punctatissima</i> (Stål, 1875) and redescriptions of <i>Digentia rufogeniculata</i> (Bolívar, 1911), <i>Digentia fasciata</i> Ramme 1929, and <i>Digentia karnyi</i> Ramme 1929. We also provide a key to identify the species of the genus.

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Sall, A. A., P. M. de A. Zanotto, O. K. Sene, et al. "Genetic Reassortment of Rift Valley Fever Virus in Nature." Journal of Virology 73, no. 10 (1999): 8196–200. http://dx.doi.org/10.1128/jvi.73.10.8196-8200.1999.

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ABSTRACT Rift Valley fever virus (RVFV), a phlebovirus of theBunyaviridae family, is an arthropod-borne virus which emerges periodically throughout Africa, emphasizing that it poses a major threat for animal and human populations. To assess the genetic variability of RVFV, several isolates from diverse localities of Africa were investigated by means of reverse transcription-PCR followed by direct sequencing of a region of the small (S), medium (M), and large (L) genomic segments. Phylogenetic analysis showed the existence of three major lineages corresponding to geographic variants from West A

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Viennois, G., N. Barbier, I. Fabre, and P. Couteron. "Multiresolution quantification of deciduousness in West Central African forests." Biogeosciences Discussions 10, no. 4 (2013): 7171–200. http://dx.doi.org/10.5194/bgd-10-7171-2013.

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Abstract. The characterization of leaf phenology in tropical forests is of major importance and improves our understanding of earth-atmosphere-climate interactions. The availability of satellite optical data with a high temporal resolution has permitted the identification of unexpected phenological cycles, particularly over the Amazon region. A primary issue in these studies is the relationship between the optical reflectance of pixels of 1 km or more in size and ground information of limited spatial extent. In this paper, we demonstrate that optical data with high to very-high spatial resolut

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Mascarello, Maurizio, Olivier Lachenaud, Mario Amalfi, et al. "Genetic characterization of a group of commercial African timber species: From genomics to barcoding." PLOS ONE 18, no. 4 (2023): e0284732. http://dx.doi.org/10.1371/journal.pone.0284732.

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In the last decades, illegal logging has posed a serious threat for the integrity of forest ecosystems and for biodiversity conservation in tropical Africa. Although international treaties and regulatory plans have been implemented to reduce illegal logging, much of the total timber volume is harvested and traded illegally from tropical African forest regions. As a result, the development and the application of analytical tools to enhance the traceability and the identification of wood and related products is critical to enforce international regulations. Among available techniques, DNA barcod

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Vizy, Edward K., and Kerry H. Cook. "Mid-Twenty-First-Century Changes in Extreme Events over Northern and Tropical Africa." Journal of Climate 25, no. 17 (2012): 5748–67. http://dx.doi.org/10.1175/jcli-d-11-00693.1.

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Abstract Changes in rainfall and temperature extremes are predicted by many global climate models as a response to greenhouse gas increases, and such changes will have significant environmental and social impacts. A regional climate model is used to predict changes in extremes across tropical and northern Africa for 2041–60 under a midline emissions forcing scenario. Six indicators are examined, including annual extreme and daily diurnal temperature ranges, heat wave days, number of dry days, number of extreme wet days, and extreme wet day rainfall intensity. Confidence in the projections is e

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