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

2020-08Journal article Open access
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dc.contributor.authorCatarino, Silvia
dc.contributor.authorRomeiras, Maria M.
dc.contributor.authorFigueira, Rui
dc.contributor.authorAubard, Valentine
dc.contributor.authorSilva, João M. N.
dc.contributor.authorPereira, José M. C.
dc.date.accessioned2021-07-21T17:37:06Z
dc.date.available2021-07-21T17:37:06Z
dc.date.issued2020-08
dc.description.abstractFire 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.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCatarino, S.; Romeiras, M.M.; Figueira, R.; Aubard, V.; Silva, J.M.N.; Pereira, J.M.C. Spatial and Temporal Trends of Burnt Area in Angola: Implications for Natural Vegetation and Protected Area Management. Diversity 2020, 12, 307. https://doi.org/10.3390/d12080307pt_PT
dc.identifier.doi10.3390/d12080307pt_PT
dc.identifier.urihttp://hdl.handle.net/10451/49044
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationFCT SFRH/BD/120054/2016pt_PT
dc.relationcE3c UID/BIA/00329/2019pt_PT
dc.relationFCT UID/AGR/04129/2019pt_PT
dc.relationFCT UIDB/00239/2020pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titleSpatial and Temporal Trends of Burnt Area in Angola: Implications for Natural Vegetation and Protected Area Managementpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue8pt_PT
oaire.citation.startPage307pt_PT
oaire.citation.titleDiversitypt_PT
oaire.citation.volume12pt_PT
person.familyNameRomeiras
person.givenNameMaria
person.identifier520836
person.identifier.ciencia-id6A1C-085E-9038
person.identifier.orcid0000-0002-9373-6302
person.identifier.ridJ-4552-2013
person.identifier.scopus-author-id15842082800
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationea7b586c-693d-44b0-a338-990949ac6e02
relation.isAuthorOfPublication.latestForDiscoveryea7b586c-693d-44b0-a338-990949ac6e02

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