@article{fdi:010077025,
  title = {{V}ery low phytoplankton diversity in a tropical saline-alkaline lake, with co-dominance of {A}rthrospira fusiformis ({C}yanobacteria) and {P}icocystis salinarum ({C}hlorophyta)},
  author = {{B}ernard, {C}. and {E}scalas, {A}. and {V}illeriot, {N}. and {A}gogue, {H}. and {H}ugoni, {M}. and {D}uval, {C}. and {C}arr{\'e}, {C}laire and {G}ot, {P}. and {S}arazin, {G}. and {J}ezequel, {D}. and {L}eboulanger, {C}hristophe and {G}rossi, {V}. and {A}der, {M}. and {T}roussellier, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{L}ake {D}ziani {D}zaha ({M}ayotte {I}sland, {I}ndian {O}cean) is a tropical thalassohaline lake which geochemical and biological conditions make it a unique aquatic ecosystem considered as a modern analogue of {P}recambrian environments. {I}n the present study, we focused on the diversity of phytoplanktonic communities, which produce very high and stable biomass (mean(2014-2015) = 652 +/- 179 mu g chlorophyll a {L}-1). {A}s predicted by classical community ecology paradigms, and as observed in similar environments, a single species is expected to dominate the phytoplanktonic communities. {T}o test this hypothesis, we sampled water column in the deepest part of the lake (18 m) during rainy and dry seasons for two consecutive years. {P}hytoplanktonic communities were characterized using a combination of metagenomic, microscopy-based and flow cytometry approaches, and we used statistical modeling to identify the environmental factors determining the abundance of dominant organisms. {A}s hypothesized, the overall diversity of the phytoplanktonic communities was very low (15 {OTU}s), but we observed a co-dominance of two, and not only one, {OTU}s, viz., {A}rthrospira fusiformis ({C}yanobacteria) and {P}icocystis salinarum ({C}hlorophyta). {W}e observed a decrease in the abundance of these co-dominant taxa along the depth profile and identified the adverse environmental factors driving this decline. {T}he functional traits measured on isolated strains of these two taxa (i.e., size, pigment composition, and concentration) are then compared and discussed to explain their capacity to cope with the extreme environmental conditions encountered in the aphotic, anoxic, and sulfidic layers of the water column of {L}ake {D}ziani {D}zaha.},
  keywords = {{P}hytoplankton ; {D}iversity ; {C}yanobacteria ; {P}icoeukaryote ; {E}xtreme environment ; {T}halassohaline lake ; {OCEAN} {INDIEN} ; {MAYOTTE} ; {COMORES}},
  booktitle = {},
  journal = {{M}icrobial {E}cology},
  volume = {78},
  numero = {3},
  pages = {603--617},
  ISSN = {0095-3628},
  year = {2019},
  DOI = {10.1007/s00248-019-01332-8},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077025},
}