Botanical Sampling Gaps Across the Cameroon Mountains

Sainge, Moses N.; Onana, Jean-Michel; Nchu, Felix; Kenfack, David; Peterson, A. Townsend

doi:10.17161/bi.v12i0.6707

Cited by 8 publications

(5 citation statements)

References 12 publications

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“…The montane forests of the Cameroon Highlands are known internationally for their rich flora and high levels of endemism, combined with high degrees of threat, making them a conservation priority (Myers, Mittermeier, Mittermeier, Fonseca, & Kent, ; Onana & Cheek, ). While several studies on plant diversity in the Cameroon Highlands have been recently published (see Sainge, Onana, Nchu, Kenfack, & Peterson, and references therein), none has assessed AGB. If Cameroon Highland forests are also shown to have high biomass, carbon projects could help conserve these threatened forests, with the added benefit of conserving high plant diversity.…”

Section: Introductionmentioning

confidence: 99%

Investigating above‐ground biomass in old‐growth and secondary montane forests of the Cameroon Highlands

Ngute

Sonké

Sainge³

et al. 2020

Afr J Ecol

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Tropical montane forests can store and sequester substantial amounts of carbon in above‐ground biomass (AGB), but variations in this storage related to location or degradation have not been quantified in the Cameroon Highlands. We established 25 permanent plots (20 m × 40 m) and sampled all trees ≥10 cm diameter following standard RAINFOR protocols. We estimated AGB and investigated variations related to taxonomic and structural forest attributes, including the height–diameter allometry in five forest types (four old‐growth dominated by different species and one secondary forest). Secondary forests had significantly lower AGB than old‐growth forests (49.4 ± 2.5 vs. >476.3 ± 168.7 Mg/ha, respectively), mostly related to lower basal area and tree height. Significant differences in species composition but not in forest structure or AGB were found between the four types of old‐growth forests studied, located at different altitudes and mountains. We discuss the importance of these montane forests for carbon storage and, considering their high diversity and current threats, their potential for carbon finance mechanisms related to both avoided deforestation and forest restoration.

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Section: Introductionmentioning

confidence: 99%

Investigating above‐ground biomass in old‐growth and secondary montane forests of the Cameroon Highlands

Ngute

Sonké

Sainge³

et al. 2020

Afr J Ecol

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“…The location and biome of the Cameroon's mountains, including Adamawa, make it one of West Africa's biggest hot spots (Myers et al 2000). The region has more than 200 plant species considered endangered, of which more than 80 are endemic (Sainge et al 2017). The entire mountain region of Cameroon is one of the most important African sites in terms of its level of endemism and species richness.…”

Section: Biogeographic Aspectsmentioning

confidence: 99%

A review of the subgenus Parapisa of Apisa (Lepidoptera: Erebidae: Arctiinae) with description of a remarkable species from Cameroonian Highlands

PAŚNIK¹,

Tarcz²,

Przybyłowicz³

2023

ASP

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The subgenus Parapisa of the genus Apisa is reviewed based on the examination of 104 specimens. Apisa (P.) cinereocostata and A. (P.) subargentea are redescribed and their intraspecific variation is analysed in detail. A new species A. (P.) asipa, similar in the general coloration to other Apisa taxa, but very distinctive in the male genital morphology and the shape of the wing scales, is described from Cameroon and Nigeria. Apisa (P.) cinereocostata is hypothesized to be a widespread, but highly polymorphic taxon with significant variation in body size, intensity of grey coloration, and the proportions and shape of certain morphostructures of male genitalia. Determination keys and extensive illustrations of the variation are provided to enable proper identification of specimens.

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“…The CVL includes a chain of isolated volcanic or plutonic mountain peaks that covers ~40,877 km 2 , stretching from Annobón Island in the Gulf of Guinea to the Mandara Mountains in the Far North Region in Cameroon. It includes a broader continental part and a smaller oceanic portion in the form of four major islands (Ayonghe et al 1999;Frodin 2001;Sainge et al 2017). The CVL is known for its rich and diverse flora with high levels of endemism combined with many threats (Sosef et al 2017;Droissart et al 2018), which led to its classification of a biodiversity hotspot Myers et al 2000;Barthlott et al 2005).…”

Section: Importance and Conservation Of The Cameroon Volcanic Linementioning

confidence: 99%

Taxonomic description and pollination ecology of Cyrtorchis okuensis (Orchidaceae, Angraecinae), a new species endemic to the Cameroon Volcanic Line

Azandi¹,

Stévart²,

Sonké³

et al. 2021

Pl. Ecol. Evol.

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Background and aims – A recent taxonomic and molecular study of the genus Cyrtorchis revealed three new species. Here, we describe one of these new species, endemic to the Cameroon Volcanic Line (CVL), and compare it to its closest relatives. Its conservation status is provided along with detailed information on its ecology and reproductive biology.Material and methods – A detailed examination of 21 herbarium specimens was performed using standard practices of herbarium taxonomy. The conservation status of the new species was assessed using the IUCN Red List Categories and Criteria. Furthermore, we investigated the reproductive biology of the new species in an easily accessible subpopulation in Cameroon and tested the hypothesis of hawkmoth pollination in the genus Cyrtorchis. Key results – The newly discovered species, here named C. okuensis, is restricted to the montane forest (1600 to 2500 m elevation) of the CVL and is currently assessed as Near Threatened (NT). Among angraecoid orchids in which hawkmoth pollination is recorded (~16 species), C. okuensis has the shortest nectar spur (19–40 mm). In situ observations revealed hawkmoths with short proboscis of the genus Hippotion (H. celerio, H. eson, and H. osiris) as the main pollinators. The rate of pollination and fruiting under natural conditions was low and among the 448 surveyed flowers only 38.8% (174/448 flowers) had their pollinia removed, 19% produced fruits (87/448 flowers), and 16% (70/448 flowers) set mature fruits. Conclusion – Cyrtorchis okuensis is clearly differentiated from C. submontana by its longer and wider floral bracts, longer anther caps, and wider triangular dorsal sepal.

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Botanical Sampling Gaps Across the Cameroon Mountains

Cited by 8 publications

References 12 publications

Investigating above‐ground biomass in old‐growth and secondary montane forests of the Cameroon Highlands

Investigating above‐ground biomass in old‐growth and secondary montane forests of the Cameroon Highlands

A review of the subgenus Parapisa of Apisa (Lepidoptera: Erebidae: Arctiinae) with description of a remarkable species from Cameroonian Highlands

Taxonomic description and pollination ecology of Cyrtorchis okuensis (Orchidaceae, Angraecinae), a new species endemic to the Cameroon Volcanic Line

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