Reference : Spatio-temporal dynamics of phytoplankton and primary production in Lake Tanganyika u...
Scientific journals : Article
Life sciences : Multidisciplinary, general & others
Life sciences : Environmental sciences & ecology
Life sciences : Aquatic sciences & oceanology
Physical, chemical, mathematical & earth Sciences : Multidisciplinary, general & others
http://hdl.handle.net/2268/2757
Spatio-temporal dynamics of phytoplankton and primary production in Lake Tanganyika using a MODIS based bio-optical time series
English
Bergamino, Nadia mailto [> >]
Horion, Stéphanie [> >]
Stenuite, Stéphane mailto [> >]
Cornet, Yves mailto [Université de Liège - ULg > Département de géographie > Télédétection, photogrammétrie (y compris photogram. satel.) >]
Loiselle, Steven mailto [> >]
Plisnier, Pierre-Denis mailto [> >]
Descy, Jean-Pierre mailto [> >]
2010
Remote Sensing of Environment
Elsevier Science
Yes (verified by ORBi)
International
0034-4257
[en] Primary production ; Phytoplankton dynamics ; Regionalisation ; Ocean colour ; MODIS-Aqua ; Lake Tanganyika
[en] Lake Tanganyika, the second largest freshwater ecosystem in Africa, is characterised by a significant heterogeneity in phytoplankton concentration linked to its particular hydrodynamics. To gather a proper understanding of primary production, it is necessary to consider spatial and temporal dynamics throughout the lake. In the present work, daily MODIS-AQUA satellite measurements were used to estimate chlorophyll-a concentrations and the diffuse attenuation coefficient (K490) for surface waters. The spatial regionalisation of Lake Tanganyika, based on Empirical Orthogonal Functions of the chlorophyll-a dataset (July 2002–November
2005), allowed for the separation of the lake in 11 spatially coherent and co-varying regions, with 2 delocalised coastal regions. Temporal patterns of chlorophyll-a showed significant differences between regions. Estimation of the daily primary production in each region indicates that the dry season is more productive than the wet season in all regions with few exceptions. Whole-lake daily primary productivity calculated on an annual basis (2003) was 646±142 mgC m−2 day−1. Comparing our estimation to previous studies, photosynthetic production in Lake Tanganyika appears to be presently lower (about 15 %), which is consistent
with other studies which used phytoplankton biovolume and changes of δ13C in the lake sediments. The decrease in lake productivity in recent decades may be associated to changes in climate conditions.
Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy
CLIMFISH
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/2757
10.1016/j.rse.2009.11.013
© 2009 Published by Elsevier Inc.

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
Bergamino_et_al_2009_Uncorrected_proof.pdfin pressPublisher postprint1.23 MBRequest copy

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.