Publications des scientifiques de l'IRD

dos Reis M. C., Bagatini I. L., Vidal L. D., Bonnet Marie-Paule, Marques D. D., Sarmento H. (2019). Spatial heterogeneity and hydrological fluctuations drive bacterioplankton community composition in an Amazon floodplain system. Plos One, 14 (8), p. e0220695 [19 p.]. ISSN 1932-6203.

Titre du document
Spatial heterogeneity and hydrological fluctuations drive bacterioplankton community composition in an Amazon floodplain system
Année de publication
2019
Type de document
Article référencé dans le Web of Science WOS:000485004000013
Auteurs
dos Reis M. C., Bagatini I. L., Vidal L. D., Bonnet Marie-Paule, Marques D. D., Sarmento H.
Source
Plos One, 2019, 14 (8), p. e0220695 [19 p.] ISSN 1932-6203
Amazonian 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. The Amazon undergoes extreme seasonal variations in water level, which produces changes in landscape and diversifies sources of organic inputs into floodplain systems. Although these changes should affect bacterioplankton community composition (BCC), little is known about which factors drive spatial and temporal patterns of bacterioplankton in these Amazonian floodplains. We used high-throughput sequencing (Illumina MiSeq) of the V3-V4 region of the 16S rRNA gene to investigate spatial and temporal patterns of BCC of two size fractions, and their correlation with environmental variables in an Amazon floodplain lake (Lago Grande do Curuai). We found a high degree of novelty in bacterioplankton, as more than half of operational taxonomic units (OTUs) could not be classified at genus level. Spatial habitat heterogeneity and the flood pulse were the main factors shaping free-living (FL) BCC. The gradient of organic matter from transition zone lake -Amazon River was the main driver for particle-attached (PA) BCC. The 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 Amazon floodplain system.
Plan de classement
Ecologie, systèmes aquatiques [036] ; Hydrologie [062]
Description Géographique
BRESIL
Localisation
Fonds IRD [F B010077005]
Identifiant IRD
fdi:010077005
Contact