Alfred Ngomanda

Biographic Data

ID5628955
NAMEAlfred Ngomanda
GIVEN NAMESAlfred
FAMILY NAMENgomanda
SIGNATURENGOMANDA A
AFFILIATIONSInstitut Africain d'Informatique
VERIFIEDNo
TOTAL WORKS9
TOTAL CITATIONS41
WORKS AS AUTHOR9
WORKS AS EDITOR0
FIRST PUBLICATION YEAR2005
LATEST PUBLICATION YEAR2021
H-INDEX2

  • Establishment and functioning of the savanna marshes of the Lopé National Park in Gabon since the termination of the African humid period and the arrival of humans 2500 years ago

    Open AccessLaurent Brémond, Richard Oslisly et al.ARTICLEThe Holocene2021References: 8

    Holocene paleoecological studies in tropical Africa are rare because most lakes either dried out at the termination of the African Humid Period or have since filled up. However, tropical sedge marshes can be an alternative to perform long-term ecological studies. The Lopé National Park (LNP) in Gabon is a mosaic of forest and savanna enclosed in the equatorial forest, where open areas facilitated the development of peat marshes accumulating sever…

  • The light-deficient climates of western Central African evergreen forests

    Open AccessNathalie Philippon, Guillaume Cornu et al.ARTICLEEnvironmental Research Letters2018

    Rainfall thresholds under which forests grow in Central Africa are lower than those of Amazonia and southeast Asia. Attention is thus regularly paid to rainfall whose seasonality and interannual variability has been shown to control Central African forests' water balance and photosynthetic activity. Nonetheless, light availability is also recognized as a key factor to tropical forests. Therefore this study aims to explore the light conditions pre…

  • Improved allometric models to estimate the aboveground biomass of tropical trees

    Open AccessJérôme Chaves, Jerome Chave et al.ARTICLEGlobal Change Biology2014

    Terrestrial carbon stock mapping is important for the successful implementation of climate change mitigation policies. Its accuracy depends on the availability of reliable allometric models to infer oven‐dry aboveground biomass of trees from census data. The degree of uncertainty associated with previously published pantropical aboveground biomass allometries is large. We analyzed a global database of directly harvested trees at 58 sites, spannin…

  • Assessment of landscape‐scale distribution of sympatric great apes in African rainforests

    Open AccessYoshihiro Nakashima, Yuji Iwata et al.ARTICLEAmerican Journal of Primatology2013

    Information on the distribution and abundance of sympatric great apes (Pan troglodytes troglodytes and Gorilla gorilla gorilla) are important for effective conservation and management. Although much research has been done to improve the precision of nest-surveys, trade-offs between data-reliability and research-efficiency have not been solved. In this study, we used different approaches to assess the landscape-scale distribution patterns of great…

  • Coupled Rock-Eval pyrolysis and spectrophotometry for lacustrine sedimentary dynamics

    Open AccessDavid Sebag, Maxime Debret et al.ARTICLEThe Holocene2013Cited by: 1References: 3

    In recent years, Nguène Lake and Kamalété Lake (Gabon, West Central Africa) have been studied repeatedly, providing comprehensive reconstructions of environmental changes over the last millennia. Both lakes are in different geomorphological and environmental settings. They are therefore excellent sites to test new methodological approaches. Indeed, the sedimentary cores provide various facies, and the previous studies provide references for calib…

  • First farmers in the Central African rainforest

    Open AccessKatharina Neumann, Koen Bostoen et al.ARTICLEQuaternary International2011Cited by: 34References: 18

  • Seasonality change and the third millennium BP rainforest crisis in southern Cameroon (Central Africa)

    Open AccessAlfred Ngomanda, Katharina Neumann et al.ARTICLEQuaternary Research2009

    The third millennium BP crisis of the central African rainforest is not sufficiently understood. The low resolution of most pollen profiles and a large plateau of the calibration curve aggravate the exact dating of the event, and its causal climatic parameters are debated. We present a high-resolution pollen profile from the swamp site Nyabessan in the southern Cameroonian rainforest, covering the period 3100-2300 cal yr BP. Between 3100 and 2500…

  • Lowland rainforest response to hydrological changes during the last 1500 years in Gabon, Western Equatorial Africa

    Open AccessAlfred Ngomanda, Dominique Jolly et al.ARTICLEQuaternary Research2007

    Pollen and δ 13 C TOM data obtained from two contrasting lake sequences (Lakes Kamalété and Nguène), located 200 km apart in the lowland rainforest of Gabon, provide complementary local and regional 1500-yr records of high resolution (15–30 yr) vegetation change. A combination of aquatic, semi-aquatic and terrestrial pollen showed in both records that the tropical rainforest increased during periods of high rainfall and decreased during drought i…

  • Vegetation changes during the past 1300 years in western equatorial Afnrca

    Open AccessAlfred Ngomanda, Alex Chepstow-Lusty et al.ARTICLEThe Holocene2005Cited by: 6References: 5

    Vegetation changes during the past 1300 years are reconstructed in western equatorial Africa using a high-resolution pollen record from Lake Kamalete This small marshy basin (c. 5-7 ha) is located in forest-savanna mosaic in Lope Reserve (043'S, 116'E), central Gabon. The Kamalete pollen data show the persistence over the past 1300 years of a relatively stable forest-savanna mosaic, associated with significant changes of the forest component. Thr…