The biodiversity of the Albertine Rift

Plumptre, Andrew J.; Davenport, Tim R.B.; Behangana, Mathias; Kityo, Robert; Eilu, Gerald; Ssegawa, P.; Ewango, Corneille; Meirte, Danny; Kahindo, Charles; Herremans, Marc; Peterhans, Julian Kerbis; Pilgrim, John D.; Wilson, Moira; Languy, Marc; Moyer, David

doi:10.1016/j.biocon.2006.08.021

Cited by 302 publications

(297 citation statements)

References 11 publications

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“…Many species are endemic for the area and the central African Highlands (Graham et al, 1995;Sun et al, 1996;Masozera and Alavalapati, 2004;Plumptre et al, 2007;Fischer and Killmann, 2008).…”

Section: Site Description and Soil Samplingmentioning

confidence: 99%

Spatial variations of nitrogen trace gas emissions from tropical mountain forests in Nyungwe, Rwanda

Gharahi

Werner²,

Ntaboba³

et al. 2012

Biogeosciences

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Abstract. Globally, tropical forest soils represent the second largest source of N 2 O and NO. However, there is still considerable uncertainty on the spatial variability and soil properties controlling N trace gas emission. Therefore, we carried out an incubation experiment with soils from 31 locations in the Nyungwe tropical mountain forest in southwestern Rwanda. All soils were incubated at three different moisture levels (50, 70 and 90 % water filled pore space (WFPS)) at 17 • C. Nitrous oxide emission varied between 4.5 and 400 µg N m −2 h −1 , while NO emission varied from 6.6 to 265 µg N m −2 h −1 . Mean N 2 O emission at different moisture levels was 46.5 ± 11.1 (50 %WFPS), 71.7 ± 11.5 (70 %WFPS) and 98.8 ± 16.4 (90 %WFPS) µg N m −2 h −1 , while mean NO emission was 69.3 ± 9.3 (50 %WFPS), 47.1 ± 5.8 (70 %WFPS) and 36.1 ± 4.2 (90 %WFPS) µg N m −2 h −1 . The latter suggests that climate (i.e. dry vs. wet season) controls N 2 O and NO emissions. Positive correlations with soil carbon and nitrogen indicate a biological control over N 2 O and NO production. But interestingly N 2 O and NO emissions also showed a positive correlation with free iron and a negative correlation with soil pH (only N 2 O). The latter suggest that chemodenitrification might, at least for N 2 O, be an important production pathway. In conclusion improved understanding and process based modeling of N trace gas emission from tropical forests will benefit from spatially explicit trace gas emission estimates linked to basic soil property data and differentiating between biological and chemical pathways for N trace gas formation.

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Section: Site Description and Soil Samplingmentioning

confidence: 99%

Spatial variations of nitrogen trace gas emissions from tropical mountain forests in Nyungwe, Rwanda

Gharahi

Werner²,

Ntaboba³

et al. 2012

Biogeosciences

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“…Rwanda, along with Burundi, are also part of the Eastern Afromontane biodiversity hotspot, which harbours tremendously high endemic diversity [23].Burundi and Rwanda are also in the top 10 countries with the highest combined rank (Table 1), and are both in the lowest categories in the Global Food Security Index (Figure 3). They are located along the Albertine Rift area of the hotspot, which encompasses much of the western Rift valley from southern Tanzania to the Rwenzori Mountains, bordering Uganda and the Democratic Republic of the Congo [36]. The Albertine rift is one of the most important regions for conservation in Africa, as it is the most species rich region for vertebrates on the African continent, containing species such as the mountain gorilla [36].…”

Section: Discussionmentioning

confidence: 99%

Global Hotspots of Conflict Risk between Food Security and Biodiversity Conservation

Molotoks

Dawson

Smith

2017

Land

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Abstract:The global challenges of food security and biodiversity are rarely addressed together, though recently there has been an increasing awareness that the two issues are closely related. The majority of land available for agriculture is already used for food production, but despite the productivity gains, one in nine people worldwide are classified as food insecure. There is an increasing risk that addressing food insecurity through methods such as agricultural expansion or intensification could lead to biodiversity loss through destruction of habitats important for conservation. This analysis uses various indicators of biodiversity at a global scale, including biodiversity hotspots, total species richness, and threatened and endemic species richness. Areas where high biodiversity coexists with high food insecurity or a high risk of agricultural expansion, were examined and found to mainly occur in the tropics, with Madagascar standing out in particular. The areas identified are especially at risk of biodiversity loss, and so are global priorities for further research and for policy development to address food insecurity and biodiversity loss together.

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“…Field data collection was conducted within the fourth sampling grid cell (Figure 1) along the riparian communities of Nyabarongo River, within the official boundaries of Kigali, the capital city of the Republic of Rwanda. The study area falls within both the Albertine Rift, a globally-recognized biodiversity hotspot with many endemic and endangered species (Plumptre et al 2007), and the Nile River and Lake Victoria Basin, one of world's great rivers and inland lakes. Since 2010, Nyabarongo and associated wetlands have been classified by the Ministerial Order No 008/ 16.01 of 13/10/2010 in the category of those to be offered fully protection.…”

Section: Study Areamentioning

confidence: 99%

Evidence for pre-dispersal predation of seeds of Tithonia diversifolia by the black-faced canary (Serinus capistratus)

Seburanga

2014

Journal of Plant Interactions

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Pre-dispersal predation of seeds of exotic Asteraceae by foraging birds is understudied. Using phenological records and photo-assisted analysis of damages made to seed heads, this paper provides evidence that the black-faced canary Serinus capistratus Finsch and Hartlaub feeds on immature achenes of Tithonia diversifolia (Hemsley) A. Gray and may control its propagule pressure up to 18% of the total number of achenes aged between 20-30 days counted from petal fall.

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The biodiversity of the Albertine Rift

Cited by 302 publications

References 11 publications

Spatial variations of nitrogen trace gas emissions from tropical mountain forests in Nyungwe, Rwanda

Spatial variations of nitrogen trace gas emissions from tropical mountain forests in Nyungwe, Rwanda

Global Hotspots of Conflict Risk between Food Security and Biodiversity Conservation

Evidence for pre-dispersal predation of seeds of Tithonia diversifolia by the black-faced canary (Serinus capistratus)

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