FN Archimer Export Format
PT J
TI Impacts of nutrient loading and fish grazing on the phytoplankton community and cyanotoxin production in a shallow tropical lake: Results from mesocosm experiments
BT 
AF AHOUTOU, Mathias K.
   YAO, Eric Kouame
   DJEHA, Rosine Y.
   KONE, Mamadou
   TAMBOSCO, Kevin
   DUVAL, Charlotte
   HAMLAOUI, Sahima
   BERNARD, Cecile
   BOUVY, Marc
   MARIE, Benjamin
   MONTUELLE, Bernard
   TROUSSELLIER, Marc
   KONAN, Felix K.
   COULIBALY, Julien Kalpy
   DOSSO, Mireille
   HUMBERT, Jean-Francois
   QUIBLIER, Catherine
AS 1:1,2;2:1;3:1;4:1;5:3;6:4;7:4;8:4;9:5;10:4;11:6;12:5;13:2;14:1;15:1;16:3;17:4,7;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;15:;16:;17:;
C1 Institut Pasteur d'Abidjan, Abidjan, Côte d'Ivoire
   Université Jean Lorougnon Guédé UFR Environnement, Daloa, Côte d'Ivoire
   iEES Paris, INRAE‐Sorbonne Université, Paris, France
   MNHN, UMR 7245 Molécules de Communication et Adaptation des Microorganismes, Paris, France
   UMR MARBEC, IRD‐Université de Montpellier, Montpellier, France
   UMR CARRTEL, INRAE‐Université de Savoie, Thonon‐Les‐Bains, France
   Université Paris Cité UFR Sciences du vivant, Paris, France
C2 INST PASTEUR COTE D'IVOIRE, COTE IVOIRE
   UNIV JEAN LOROUGNON GUEDE, COTE IVOIRE
   INRAE, FRANCE
   MNHN, FRANCE
   IRD, FRANCE
   UNIV SAVOIE, FRANCE
   UNIV PARIS CITE, FRANCE
UM MARBEC
IN WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 3.4
TC 4
UR https://archimer.ifremer.fr/doc/00770/88224/93769.pdf
LA English
DT Article
DE ;biomanipulation;eutrophication;freshwater lagoon;Ivory Coast;mesocosm experiment;phytoplankton
AB Given the increasing eutrophication of water bodies in Africa due to increasing anthropogenic pressures, data are needed to better understand the responses of phytoplankton communities to these changes in tropical lakes. These ecosystems are used by local human populations for multiple purposes, including fish and drinking water production, potentially exposing these populations to health threats if, for example, an increase in toxic cyanobacterial blooms is associated with increasing eutrophication. To test the short-term response of the phytoplankton community to the addition of nutrients (phosphorus and nitrogen, alone or in combination) and Nile tilapia, we developed an in situ mesocosm experiment in a freshwater lagoon located near Abidjan (Ivory Coast). We found that phytoplankton growth (estimated by chlorophyll-a quantification) was highly stimulated when both nitrogen and phosphorus were added, while there was no clear evidence for such colimitation by these two nutrients when considering their concentrations in the lagoon. Phytoplankton growth was accompanied by significant changes in the diversity and composition of this community and did not lead to an increase in the proportions of cyanobacteria. However, the addition of fish to some mesocosms resulted in a drastic decrease in phytoplankton biomass and a dominance of chlorophytes in this community. Finally, these experiments showed that the addition of nitrogen, alone or combined with phosphorus, stimulated microcystin production by cyanobacteria. In addition, no evidence of microcystin accumulation in the fish was found. Taken together, these data allow us to discuss strategies for controlling cyanobacterial blooms in this tropical ecosystem. 
PY 2022
PD APR
SO Microbiologyopen
SN 2045-8827
PU Wiley
VL 11
IS 2
UT 000787848100001
DI 10.1002/mbo3.1278
ID 88224
ER

EF