@article{fdi:010077005, title = {{S}patial heterogeneity and hydrological fluctuations drive bacterioplankton community composition in an {A}mazon floodplain system}, author = {dos {R}eis, {M}. {C}. and {B}agatini, {I}. {L}. and {V}idal, {L}. {D}. and {B}onnet, {M}arie-{P}aule and {M}arques, {D}. {D}. and {S}armento, {H}.}, editor = {}, language = {{ENG}}, abstract = {{A}mazonian floodplains form complex hydrological networks that play relevant roles in global biogeochemical cycles, and bacterial degradation of the organic matter in these systems is key for regional carbon budget. {T}he {A}mazon undergoes extreme seasonal variations in water level, which produces changes in landscape and diversifies sources of organic inputs into floodplain systems. {A}lthough these changes should affect bacterioplankton community composition ({BCC}), little is known about which factors drive spatial and temporal patterns of bacterioplankton in these {A}mazonian floodplains. {W}e used high-throughput sequencing ({I}llumina {M}i{S}eq) of the {V}3-{V}4 region of the 16{S} r{RNA} gene to investigate spatial and temporal patterns of {BCC} of two size fractions, and their correlation with environmental variables in an {A}mazon floodplain lake ({L}ago {G}rande do {C}uruai). {W}e found a high degree of novelty in bacterioplankton, as more than half of operational taxonomic units ({OTU}s) could not be classified at genus level. {S}patial habitat heterogeneity and the flood pulse were the main factors shaping free-living ({FL}) {BCC}. {T}he gradient of organic matter from transition zone lake -{A}mazon {R}iver was the main driver for particle-attached ({PA}) {BCC}. {T}he {BCC} reflected the complexity of the system, with more variation in space than in time, although both factors were important drivers of the {BCC} in this {A}mazon floodplain system.}, keywords = {{BRESIL} ; {AMAZONIE} ; {GRANDE} {DO} {CURUAI} {LAC}}, booktitle = {}, journal = {{P}los {O}ne}, volume = {14}, numero = {8}, pages = {e0220695 [19 p.]}, ISSN = {1932-6203}, year = {2019}, DOI = {10.1371/journal.pone.0220695}, URL = {https://www.documentation.ird.fr/hor/fdi:010077005}, }