Taxonomic study ofBarbus neumayeriandBarbus pellegrinifrom the Lake Kivu-Lake Edward region, East Africa

2013 ◽  
Vol 51 (2) ◽  
pp. 300-306
Author(s):  
Chrisestom Mwatete Mlewa
Keyword(s):  
East Africa ◽  
Taxonomic Study ◽  
Lake Kivu ◽  
Lake Edward

scholarly journals Missing atmospheric noble gases in a large, tropical lake: The case of Lake Kivu, East-Africa

2020 ◽  
Vol 532 ◽  
pp. 119374
Author(s):  
Fabian Bärenbold ◽  
Martin Schmid ◽  
Matthias S. Brennwald ◽  
Rolf Kipfer
Keyword(s):  
East Africa ◽  
Noble Gases ◽  
Tropical Lake ◽  
Lake Kivu

Microcrystalline sphalerite in resin globules suspended in Lake Kivu, East Africa

1972 ◽  
Vol 7 (1) ◽  
Author(s):  
E.T. Degens ◽  
H. Okada ◽  
S. Honjo ◽  
J.C. Hathaway
Keyword(s):  
East Africa ◽  
Lake Kivu

scholarly journals Nitrous oxide and methane seasonal variability in the epilimnion of a large tropical meromictic lake (Lake Kivu, East-Africa)

2016 ◽  
Vol 79 (2) ◽  
pp. 209-218 ◽  
Author(s):  
Fleur A. E. Roland ◽  
François Darchambeau ◽  
Cédric Morana ◽  
Alberto V. Borges
Keyword(s):  
Nitrous Oxide ◽  
East Africa ◽  
Seasonal Variability ◽  
Meromictic Lake ◽  
Lake Kivu

scholarly journals Chemoautotrophy and anoxygenic photosynthesis within the water column of a large meromictic tropical lake (Lake Kivu, East Africa)

2016 ◽  
Vol 61 (4) ◽  
pp. 1424-1437 ◽  
Author(s):  
Cédric Morana ◽  
Fleur A. E. Roland ◽  
Sean A. Crowe ◽  
Marc Llirós ◽  
Alberto V. Borges ◽  
...  
Keyword(s):  
Water Column ◽  
East Africa ◽  
Tropical Lake ◽  
Anoxygenic Photosynthesis ◽  
Lake Kivu

Monohydrocalcite in the sediments of Lake Kivu (East Africa)

Sedimentology ◽  
1974 ◽  
Vol 21 (1) ◽  
pp. 163-170 ◽  
Author(s):  
PETER STOFFERS ◽  
REINHARD FISCHBECK
Keyword(s):  
East Africa ◽  
Lake Kivu

Lowland forest collapse and early human impacts at the end of the African Humid Period at Lake Edward, equatorial East Africa

2017 ◽  
Vol 89 (1) ◽  
pp. 7-20 ◽  
Author(s):  
Sarah J. Ivory ◽  
James Russell
Keyword(s):  
East Africa ◽  
Iron Age ◽  
Human Activities ◽  
Human Impacts ◽  
Early Holocene ◽  
Pollen Record ◽  
Holocene Climate ◽  
Lowland Forest ◽  
Lake Edward ◽  
Early Human

AbstractIn Africa, the early Holocene was characterized by wetter, warmer conditions than today, followed by rapid aridification at ~5.2 ka. However, a lack of lowland vegetation records has prevented a detailed evaluation of forest response to Holocene climate change. Additionally, although modern vegetation communities are linked to human disturbance, few studies have addressed how prehistoric human activities helped engineer the character of modern African ecosystems. Understanding the architecture of lowland and highland forests is important to prevent further degradation from climate/land-use change. We present an 11,000 yr fossil pollen record from Lake Edward, Uganda. We show that Guineo-Congolian forests dominated the highlands and lowlands in equatorial East Africa in the early Holocene, highlighting the importance of rainfall and temperature in controlling forest communities. These forests remained until ~5.2 ka, when the climate became drier. The lacustrine ecosystem response to aridification was abrupt; however, forest decreased gradually, replaced by deciduous woodlands. Woodlands dominated until after an arid period at 2 ka; however, forest did not recover. Increased disturbance indicators and grasses suggest that the arrival of Iron Age people resulted in the modern fire-tolerant vegetation. Although late Holocene climate played a role in vegetation opening, the modern ecosystem architecture in East Africa is linked to early human activities.

scholarly journals Biogeochemistry of a large and deep tropical lake (Lake Kivu, East Africa): insights from a stable isotope study covering an annual cycle

2014 ◽  
Vol 11 (12) ◽  
pp. 17227-17254 ◽  
Author(s):  
C. Morana ◽  
F. Darchambeau ◽  
F. A. E. Roland ◽  
A. V. Borges ◽  
F. Muvundja ◽  
...  
Keyword(s):  
Organic Matter ◽  
Stable Isotope ◽  
East Africa ◽  
Mixed Layer ◽  
Seasonal Variability ◽  
Rainy Season ◽  
Dry Season ◽  
Tropical Lake ◽  
Particulate Nitrogen ◽  
Lake Kivu

Abstract. During this study, we investigated the seasonal variability of the concentration and the stable isotope composition of several inorganic and organic matter reservoirs in the large, oligotrophic and deep tropical Lake Kivu (East Africa). Data were acquired during one year at a fornightly temporal resolution. The δ13C signature of the dissolved inorganic carbon (DIC) increased linearly with time during the rainy season, then suddenly decreased during the dry season due to vertical mixing with δ13C-depleted DIC waters. This pattern reflects the net autotrophic status of the mixed layer of Lake Kivu, contrary to the common observation that oligotrophic aquatic ecosystems tend to be net heterotrophic. The δ13C signature of the particulate organic carbon pool (POC) revealed the presence of a consistently abundant methanotrophic biomass in the oxycline throughout the year. We also noticed a seasonal shift during the dry season toward higher values in the δ15N of particulate nitrogen (PN) in the mixed layer and δ15N-PN was significantly related to the contribution of cyanobacteria to the phytoplankton assemblage, suggesting that rainy season conditions could be more favourable to atmospheric nitrogen-fixing cyanobacteria. Finally, zooplankton were slightly enriched in δ13C compared to the autochtonous POC pool, and the δ15N signature of zooplankton followed well the seasonal variability in δ15N-PN, being consistently 3.0 ± 1.1‰ heavier than the PN pool. Together, δ13C and δ15N analysis suggests that zooplankton directly incorporate algal-derived organic matter in their biomass, and they would rely almost exclusively on this source of organic matter throughout the year in general agreement with the very low allochthonous organic matter inputs from rivers in Lake Kivu.

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