@article{fdi:010061297, title = {{F}reshwater prokaryote and virus communities can adapt to a controlled increase in salinity through changes in their structure and interactions}, author = {{C}ombe, {M}arine and {B}ouvier, {T}. and {P}ringault, {O}livier and {R}ochelle {N}ewall, {E}mma and {B}ouvier, {C}. and {A}gis, {M}. and {T}hu, {P}.{T}. and {T}orr{\'e}ton, {J}ean-{P}ascal and {T}huoc, {C}.{V}. and {B}ettarel, {Y}van}, editor = {}, language = {{ENG}}, abstract = {{L}ittle information exists on the ecological adaptive responses of riverine microorganisms to the salinity changes that typically occur in transitional waters. {T}his study examined the precise effects of a gradual increase in salinity (+3 units per day for 12 days) on freshwater virus and prokaryote communities collected in the {R}ed {R}iver {D}elta (northern {V}ietnam). {T}he abundance, activity, morphology and diversity of both communities were examined along this simulated salinity gradient (0-36). {T}hree main successive ecological stages were observed: (1) a continuous decline in prokaryotic and viral abundance from the start of the salinization process up to salinity 12-15 together with a strong decrease in the proportion of active cells, (2) a shift in both community compositions (salinity 9-15) and (3) a marked prevalence of lysogenic over lytic cycles up to salinity 21 followed by a collapse of both types of viral infection. {F}inally, after salinity 21, and up to seawater salinities (i.e. 36) the prokaryotic community showed multiple signs of recovery with their abundance and function even reaching initial levels. {T}hese results suggest that most of the physiological and phylogenetic changes that occurred within the salinity range 10-20 seemed to favor the installation of osmotically adapted prokaryotes accompanied by a specific cortege of viral parasites which might both be able to survive and even proliferate in saltwater conditions.}, keywords = {virus ; prokaryote ; salinity ; microbial ecology ; estuaries ; lysogeny ; tropical aquatic ecosystems ; {VIET} {NAM}}, booktitle = {}, journal = {{E}stuarine {C}oastal and {S}helf {S}cience}, volume = {133}, numero = {}, pages = {58--66}, ISSN = {0272-7714}, year = {2013}, DOI = {10.1016/j.ecss.2013.08.013}, URL = {https://www.documentation.ird.fr/hor/fdi:010061297}, }