@article{fdi:010066973, title = {{C}olonization and release processes of viruses and prokaryotes on artificial marine macroaggregates}, author = {{B}ettarel, {Y}van and {M}otegi, {C}. and {W}einbauer, {M}. {G}. and {M}ari, {X}avier}, editor = {}, language = {{ENG}}, abstract = {{M}arine organic aggregates are sites of high of viral accumulation; however, still little is known about their colonization processes and interactions with their local bacterial hosts. {B}y taking advantage of a novel approach (paramagnetic functionalized microsphere method) to create and incubate artificial macroaggregates, we examined the small-scale movements of viruses and bacteria between such marine snow particles and the surrounding water. {T}he examination of the codynamics of both free-living and attached viral and bacterial abundance, over 12 hours of incubation in virus-free water, suggests that aggregates are rather comparable to viral factories than to viral traps where a significant part of the virions production might be locally diverted to the water column. {A}lso, the near-zero proportion of lysogenized cells measured in aggregates after mitomycin-{C} induction seems to indicate that lysogeny is not a prominent viral reproduction pathway in organic aggregates where most viruses might rather be virulent. {F}inally, we hypothesize that, contrary to bacteria, which can use both strong attachment and detachment from aggregates (two-way motion of bacteria), the adsorption of planktonic viruses appears to be numerically negligible compared to their massive export from the aggregates into the water column (one-way motion of viruses).}, keywords = {viruses ; bacteria ; aggregates ; seawater ; ecology ; {NOUVELLE} {CALEDONIE}}, booktitle = {}, journal = {{F}ems {M}icrobiology {L}etters}, volume = {363}, numero = {1}, pages = {fnv216 [8 ]}, ISSN = {0378-1097}, year = {2016}, DOI = {10.1093/femsle/fnv216}, URL = {https://www.documentation.ird.fr/hor/fdi:010066973}, }