Species richness and distribution of the largest plant radiation of Angola: Euphorbia (Euphorbiaceae)

Frazão, Raquel; Catarino, Sílvia; Goyder, D. J.; Darbyshire, Iain; Magalhães, María Filomena; Romeiras, Maria M.

doi:10.1007/s10531-019-01878-6

Cited by 7 publications

(11 citation statements)

References 47 publications

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“…This map was produced at a global scale and reflects the regionalization of the Earth's terrestrial biodiversity, defining units that contain a distinct assemblage of natural communities sharing a large majority of species, dynamics, and environmental conditions [20]. WWF ecoregions has been used as a basis for studies on biotic diversity and conservation in Angola [19,21,74].…”

Section: Wwf Ecoregions Protected Areas and Land Cover Datamentioning

confidence: 99%

“…Angola encompasses a great diversity of habitats from desert to tropical rain forests but is dominated by grasslands, savannas, and scrublands [19]. In total, 15 different ecoregions of the global ecoregions map of World Wildlife Fund (WWF) are present in Angola [20], of which the most widespread are the Miombo woodlands of the central plateau, and the western Congolian forest-savanna mosaics in the north [21].…”

Section: Introductionmentioning

confidence: 99%

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Spatial and Temporal Trends of Burnt Area in Angola: Implications for Natural Vegetation and Protected Area Management

et al. 2020

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Fire is a key driver of natural ecosystems in Africa. However, human activity and climate change have altered fire frequency and severity, with negative consequences for biodiversity conservation. Angola ranks among the countries with the highest fire activity in sub-Saharan Africa. In this study, we investigated the spatial and temporal trends of the annual burnt area in Angola, from 2001 to 2019, and their association with terrestrial ecoregions, land cover, and protected areas. Based on satellite imagery, we analyzed the presence of significant trends in burnt area, applying the contextual Mann–Kendall test and the Theil–Sen slope estimator. Data on burnt areas were obtained from the moderate-resolution imaging spectroradiometer (MODIS) burnt area product and the analyses were processed in TerrSet. Our results showed that ca. 30% of the country’s area burned every year. The highest percentage of annual burnt area was found in northeast and southeast Angola, which showed large clusters of decreasing trends of burnt area. The clusters of increasing trends were found mainly in central Angola, associated with savannas and grasslands of Angolan Miombo woodlands. The protected areas of Cameia, Luengue-Luiana, and Mavinga exhibited large areas of decreasing trends of burnt area. Conversely, 23% of the Bicuar National Park was included in clusters of increasing trends. Distinct patterns of land cover were found in areas of significant trends, where the clusters of increasing trends showed a higher fraction of forest cover (80%) than the clusters of decreasing trends (55%). The documentation of burnt area trends was very important in tropical regions, since it helped define conservation priorities and management strategies, allowing more effective management of forests and fires in countries with few human and financial resources.

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Section: Wwf Ecoregions Protected Areas and Land Cover Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Trends of Burnt Area in Angola: Implications for Natural Vegetation and Protected Area Management

et al. 2020

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“…In particular, the chapters on the flora of Angola (Goyder & Gonçalves 2019) and landscape changes in Angola (Mendelsohn 2019) have informed the current work. Some recent collections by D. J. Goyder (K) from Angola are housed in the fledgling herbarium of the government's Instituto Nacional da Biodiversidade e Áreas de Conservação, which is not yet listed on Index Herbariorum; this is abbreviated to 'INBAC' (following Darbyshire & Goyder 2019).…”

Section: Methodsmentioning

confidence: 99%

“…Although unexpected, this range extension is not unprecedented; for example Justicia subsessilis Oliv. has recently been recorded from Angola for the first time, a long way west of its previously known Zambian range (Darbyshire & Goyder 2019 Perennial herb or subshrub, 10 -60 cm tall; stems strigose with white anvil-shaped hairs, young stems often also patent glandular-pubescent; mature stems with pale greyish bark, glabrescent. Leaf buds densely whitestrigose.…”

Section: Key To Infraspecific Variants Of Barleria Matopensismentioning

confidence: 96%

“…The Lubango area is particularly noteworthy as the only half-degree-square to hold more than 10 Barleria taxa. The Lubango Highlands (Serra da Chela) potentially hold as many as 200 endemic plant species (Goyder & Gonçalves 2019), and several endemic or range- with highest species richness and so of high conservation importance (Frazão et al 2019). Parallel radiations within Acanthaceae, e.g., in the genus Petalidium, further exemplify the botanical importance of these two regions.…”

Section: Angolamentioning

confidence: 99%

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A taxonomic revision of Acanthaceae tribe Barlerieae in Angola and Namibia. Part 2

2021

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SummaryThe second part of a taxonomic revision of the tribe Barlerieae (Acanthaceae) in Angola and Namibia covers Barleria sects. Somalia and Stellatohirta. Thirty-one taxa including 27 accepted species are treated. Four new species (Barleria eburnea, B. imatensis, B. louiseana and B. thunbergiiflora), one new subspecies (B. kacondensis subsp. glabrescens) and one new variety (B. violascens var. humpatana) are described. In addition, B. taitensis S.Moore var. occidentalis S.Moore is elevated to subspecies status and B. newtonii Lindau is resurrected as a distinct species endemic to the Lubango Highlands of Angola. Full descriptions, citations of types and representative specimens, and notes on their habitat(s), ecology and biogeography are provided for each taxon. Thirteen names in Barleria are lectotypified and a neotype is selected for B. newtonii. A preliminary assessment of the conservation status and extinction risk is provided for each taxon. Of the 31 taxa enumerated, five are assessed as Endangered, two as Vulnerable, two as Near Threatened, and 13 are of Least Concern, whilst nine are currently considered to be Data Deficient. This contribution completes our revision of Barleria in Angola and Namibia, with 59 accepted species, four additional subspecies, four additional varieties and two incompletely known taxa documented in total. A remarkable 75% of the taxa are endemic or near-endemic to Angola and Namibia.

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Risk perceptions of wildlife by the resident human population in the Iona National Park, southwest Angola

Fabiano,

Verschueren,

Shikangalah

2024

Wildlife Biology

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Establishing conservation management requires an understanding of local livelihoods, human–wildlife interactions, and community risk perceptions of wildlife, particularly in fragile landscapes with residing human populations. The Iona National Park in Angola is characterized by a harsh but unique arid environment and is home to semi‐nomadic human residents. Due to the prolonged civil war, the park's management only resumed in the early 2000s. To understand the socio‐ecological needs of such systems, we conducted semi‐structured questionnaires with 356 respondents across all villages in the national park. We identified main livelihood strategies in Iona National Park as livestock production of goat and cattle, and cultivation of maize. Estimates of livestock biomass (8.42 kg ha‐1) indicated severe overstocking. Seventeen wild mammal species were reported as threatening livelihoods, of which leopard and cheetah presented the highest risk for cattle; leopard, fox species, and caracal for goats; and porcupine and baboon for crops. The complexity of human–wildlife conflict was highlighted by contrasting perceptions of species abundance, perceived risk, and culprit species. The restoration of arid African landscapes may require the implementation of community‐based natural resource management that is aligned with ecosystem carrying capacity. This study therefore provided new insights and baseline information for effective conservation management, both for the Iona National Park and for areas with a similar socio‐environmental context.

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Species richness and distribution of the largest plant radiation of Angola: Euphorbia (Euphorbiaceae)

Cited by 7 publications

References 47 publications

Spatial and Temporal Trends of Burnt Area in Angola: Implications for Natural Vegetation and Protected Area Management

Spatial and Temporal Trends of Burnt Area in Angola: Implications for Natural Vegetation and Protected Area Management

A taxonomic revision of Acanthaceae tribe Barlerieae in Angola and Namibia. Part 2

Risk perceptions of wildlife by the resident human population in the Iona National Park, southwest Angola

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