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people from the INERA, which have helped intensively with the inventory and the species identification, as well as all the people from the University of Kisangani (UNIKIS) and the Institut Facultaire des ...doi:10.1890/es15-00342.1 fatcat:75we74cawrbdhhhu24gu2u4a2m
slash-and-burn agriculture, including clearing after 159 burning and cultivation until the soil loses fertility; the fields are then left uncultivated 160 for up to 20 years to allow soil regeneration (De ...doi:10.1111/jvs.12512 fatcat:totoyggisvbwjakm7547i2g2pm
Policies to reduce emissions from deforestation and forest degradation largely depend on accurate estimates of tropical forest carbon stocks. Here we present the first field-based carbon stock data for the Central Congo Basin in Yangambi, Democratic Republic of Congo. We find an average aboveground carbon stock of 162±20 Mg C ha À 1 for intact old-growth forest, which is significantly lower than stocks recorded in the outer regions of the Congo Basin. The best available tree height-diameterdoi:10.1038/ncomms3269 pmid:23912554 fatcat:ze4ymdfahfg6varkzzp7haplge
more »... tionships derived for Central Africa do not render accurate canopy height estimates for our study area. Aboveground carbon stocks would be overestimated by 24% if these inaccurate relationships were used. The studied forests have a lower stature compared with forests in the outer regions of the basin, which confirms remotely sensed patterns. Additionally, we find an average soil carbon stock of 111 ± 24 Mg C ha À 1 , slightly influenced by the current land-use change.
Measured trees were identified up to the species-level in the field, and samples were deposited in the Herbarium and botanical African library of the Université libre de Bruxelles (references Bastin-Serckx ...doi:10.1371/journal.pone.0142146 pmid:26555144 pmcid:PMC4640573 fatcat:e5amtgxwxbambd5o5ieouy7jsi
Perturbations caused by alien species on native plant regeneration and on soil microbial dynamics are major problem to biodiversity conservation. In this study, our main objective was to evaluate the impact of the propagation of an exotic plant species, Psidium cattleianum, i) on soil Arbuscular Mycorrhizal (AM) fungus dynamics, and ii) on the regeneration of Uapaca ferruginea, a native species in the Eastern forest of Madagascar. Soil samples were collected within (i) a homogenous formation ofdoi:10.1007/s11355-017-0340-z fatcat:arnvzkopdja6lbqwk4evckuwsi
more »... P. cattleianum, (ii) a natural forest devoid of P. cattleianum dominated mainly by U. ferruginea, and (iii) a degraded soil outside the forest and devoid of P. cattleianum. Soil enzymatic activities, soil microbial activity, the Most Probable Number (MPN) of mycorrhizal propagules in soil and the total number of Arbucular Mycorrhiza spores in soil were assessed. Seedling development of U. ferruginea planted on these three soil samples were assessed after 5 months culturing under greenhouse conditions. The total numbers of AM Fungal spores were significantly high on colonized soil by P. cattleianum. Global microbial activity was significantly higher on natural forest soil than those recorded on the other soil samples. Seedling development of U. ferruginea decreased from soil forest to invaded soil by P. cattleianum and degraded soil.
Given the impact of tropical forest disturbances on atmospheric carbon emissions, biodiversity, and ecosystem productivity, accurate long-term reporting of Land-Use and Land-Cover (LULC) change in the pre-satellite era (<1972) is an imperative. Here, we used a combination of historical (1958) aerial photography and contemporary remote sensing data to map long-term changes in the extent and structure of the tropical forest surrounding Yangambi (DR Congo) in the central Congo Basin. Our studydoi:10.3390/rs12040638 fatcat:unnc7v63ybdz5e4fa6c7xsxlzi
more »... raged structure-from-motion and a convolutional neural network-based LULC classifier, using synthetic landscape-based image augmentation to map historical forest cover across a large orthomosaic (~93,431 ha) geo-referenced to ~4.7 ± 4.3 m at submeter resolution. A comparison with contemporary LULC data showed a shift from previously highly regular industrial deforestation of large areas to discrete smallholder farming clearing, increasing landscape fragmentation and providing opportunties for substantial forest regrowth. We estimated aboveground carbon gains through reforestation to range from 811 to 1592 Gg C, partially offsetting historical deforestation (2416 Gg C), in our study area. Efforts to quantify long-term canopy texture changes and their link to aboveground carbon had limited to no success. Our analysis provides methods and insights into key spatial and temporal patterns of deforestation and reforestation at a multi-decadal scale, providing a historical context for past and ongoing forest research in the area.
The responses of tropical forests to environmental change are critical uncertainties in predicting the future impacts of climate change. The positive phase of the 2015–2016 El Niño Southern Oscillation resulted in unprecedented heat and low precipitation in the tropics with substantial impacts on the global carbon cycle. The role of African tropical forests is uncertain as their responses to short-term drought and temperature anomalies have yet to be determined using on-the-ground measurements.doi:10.1073/pnas.2003169118 pmid:34001597 pmcid:PMC8166131 fatcat:tf6yasemjnf2ze4cq4pi7eop6i
more »... African tropical forests may be particularly sensitive because they exist in relatively dry conditions compared with Amazonian or Asian forests, or they may be more resistant because of an abundance of drought-adapted species. Here, we report responses of structurally intact old-growth lowland tropical forests inventoried within the African Tropical Rainforest Observatory Network (AfriTRON). We use 100 long-term inventory plots from six countries each measured at least twice prior to and once following the 2015–2016 El Niño event. These plots experienced the highest temperatures and driest conditions on record. The record temperature did not significantly reduce carbon gains from tree growth or significantly increase carbon losses from tree mortality, but the record drought did significantly decrease net carbon uptake. Overall, the long-term biomass increase of these forests was reduced due to the El Niño event, but these plots remained a live biomass carbon sink (0.51 ± 0.40 Mg C ha−1 y−1) despite extreme environmental conditions. Our analyses, while limited to African tropical forests, suggest they may be more resistant to climatic extremes than Amazonian and Asian forests.
d'Aménagement et de Gestion 609 intégrés des Forêts et Territoires tropicaux (ERAIFT Kinshasa), WWF-D.R.Congo, WCS-610 D.R.Congo, the Université de Kisangani, Université Officielle de Bukavu, Université ... Parcs Nationaux de Gabon (ANPN), Institut de Recherche en Ecologie 603 Tropicale du Gabon, Rougier-Gabon, the Marien Ngouabi University of Brazzaville, the Ministère 604 des Eaux et Forêts (République ...doi:10.1038/s41586-020-2035-0 pmid:32132693 fatcat:4nqkj752mnas7ngcupqomkn4me
Both metrics were indeed weighted by basal area, driven de facto by the largest trees. Their consistency across sites and continents was not expected though. ...doi:10.1111/geb.12803 fatcat:wn3o6aawnbgspfdqx4ew2zgtvy
Alidé Kidimbu, Elisabeth Kearsly and Thalès de Haulleville are warmly thanked for the selection of the forest plots at the Yangambi Biosphere Reserve. ... The authors are indebted to Cyrille Gerstmans and Daniel De Wit for technical assistance. ... removed the genus Piccolia A.Massal. from synonymy with Biatorella De Not., recognizing four species. Recently Knudsen & Lendemer (2007) transferred B. nannaria (Tuck.) ...doi:10.5091/plecevo.2013.906 fatcat:vwhigkuoyvdynjcudcupuiunme
Opepa, Jeanette Kemp, Wilmar Lopez Oviedo, Jean-Remy Makana, Faustin Mbaya 359 Mpanya Lukasu, Irina Mendoza Polo, Edi Mirmanto, Sam Moore, Jacques Mukinzi, Pétrus Naisso, 360 Lucas Ojo, Raimunda Oliveira de ...doi:10.1126/science.aaw7578 pmid:32439789 fatcat:4scf3gfnyvdeppu6srjkymvdqu
Un inventaire des oiseaux du sous-bois a ete fait dans la Reserve de biosphere de Yangambi, RD Congo, en septembre 2012, a faide de filets japonais. ... L'objectif etait de comparer la presence des oiseaux en foret primaire, en foret secondaire et en foret de transition dans cette zone tropicale humide de basse altitude. ... We are grateful to Elizabeth Kearsley, Thales de Haulleville, Hilde Keunen, Erik Verheyen, Celestin Danadu and Heritier Fundji, among others, who helped to organise our field campaign. ...doi:10.5962/p.310193 fatcat:yfsn5gryzzeufkwd55pqfn32wq
We thank Katja van Nieuland and Thales de Haulleville for their help with the sample processing and chemical analyses. ... The best-studied of these monodominant forests in Africa is that dominated by Gilbertiodendron dewevrei (De Wild.) J. ...doi:10.1002/ece3.2589 pmid:28070293 pmcid:PMC5216677 fatcat:xbw6yss6cja3hjqid7igwag7ea
Alidé Kidimbu, Elisabeth Kearsly and Thalès de Haulleville are warmly thanked for the selection of the forest plots at the Yangambi Biosphere Reserve. ... The authors are indebted to Cyrille Gerstmans and Daniel De Wit for technical assistance. ...doi:10.1017/s0024282913000790 fatcat:m3pqawrrlrgf5dya6yqs5zynaa
We thank Katja van Nieuland and Thales de Haulleville for their help with the sample processing and chemical analyses. CO N FLI C T O F I NTE R E S T None declared. ... plots of one hectare were installed and measured in 2012 (Kearsley et al., 2013) in old-growth mixed forest (n = 5), and old-growth monodominant forest (n = 5) dominated by Gilbertiodendron dewevrei (De ...doi:10.1002/ece3.4836 pmid:31031910 pmcid:PMC6476792 fatcat:fsc6borinrhfvbu5u4ylwvpv2u
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