some metabolic pathways which are possible in terms of
thermodynamics have not yet been identified within
haloalkaliphiles. It is noteworthy that microorganisms
which may oxidize acetate in soda lakes were not identified
so far, nor those who could benefit from the oxidation of NO
during the course of heterotrophic denitrification.
10.7.3.1 Phototrophic Primary Producers
A characteristic feature of the majority of soda lakes is their
color. According to the chemistry of their water, soda lakes
can be green, pink, red, or orange because of their permanent
or seasonal abundance of microorganisms. This reflects an
extremely high primary carbon production more than
10 g C m
À2 d
À1 . Indeed, soda lakes are mainly located in
areas of the world that benefit of high light intensities and
where the temperature is high (30–35
C). Phosphate availability and virtually unlimited availability to CO 2 in the
Table 10.4 (continued)
Halanaerobiales
Halobacteroidaceae
Fuchsiella, Halonatronum, Natroniella
Natranaerobiales
Natranaerobiaceae
Natranaerobius
Phylum Proteobacteria
Alphaproteobacteria
Rhizobiales
Bradyrhizobiaceae
Nitrobacter
Rhodobacterales
Rhodobacteraceae
Maritimibacter; Rhodobaca, Roseinatronobacter,
Roseibaca
Betaproteobacteria
Nitrosomonadales
Nitrosomonadaceae
Nitrosomonas
Deltaproteobacteria
Desulfobacterales
Desulfobacteraceae
Desulfonatronobacter
Desulfobulbaceae
Desulfurivibrio, Desulfopila
Desulfovibrionales
Desulfohalobiaceae
Desulfonatronospira, Desulfonatronovibrio
Desulfonatronaceae
Desulfonatronum
Desulfuromonadales
Geobacteraceae
Geoalkalibacter
Gammaproteobacteria
Alteromonadales
Alteromonadaceae
Nitrincola, Salinimonas
Moritellaceae
Paramoritella
Chromatiales
Chromatiaceae
Thioalkalicoccus, Marichromatium
Ectothiorhodospiraceae
Alkalilimnicola, Alkalispirillum, Ectothiorhodospira,
Halorhodospira, Thiorhodospira, Thiohalospira,
Thioalkalivibrio
Thioalkalispiraceae
Thioalkalispira
Methylococcales
Methylococcaceae
Methylomicrobium (Methylohalobius)
Oceanospirillales
Halomonadaceae
Halomonas
(continued)
Table 10.4 (continued)
Oceanospirillaceae
Marinospirillum
Pseudomonadales
Pseudomonadaceae
Pseudomonas
Thiotrichales
Piscirickettsiaceae
Methylophaga, Thioalkalimicrobium
Vibrionales
Vibrionaceae
Salinivibrio
Gammaproteobacteria non classified
Alkalimonas
Phylum Spirochaetes
Spirochaetes
Spirochaetales
Spirochaetaceae
Spirochaeta
Domain Archaea
Phylum Euryarchaeota
Halobacteria
Halobacteriales
Halobacteriaceae
Natrialba, Natrinema, Natronoarchaeum,
Natronobacterium
Natronomonas, Natronorubrum, Natronolimnobius
Natronococcus, Halorubrobacterium (Halorubrum)
Methanobacteria
Methanobacteriales
Methanobacteriaceae
Methanobacterium
Methanomicrobia
Methanosarcinales
Methanosarcinaceae
Methanosalsum, Methanohalophilus
388
J.-L. Cayol et al.