RT info:eu-repo/semantics/article
T1 Prokaryotic community diversity in the sediments of saline lagoons and its resistance to seasonal disturbances by water level cycles
A1 Sáenz de Miera Carnicer, Luis Enrique
A1 Gutiérrez González, Juan J.
A1 Arroyo Hernández, Paula
A1 Falagán Fernández, Jorge
A1 Ansola González, Gemma
A2 Genetica
K1 Biología
K1 Botánica
K1 Ecología. Medio ambiente
K1 Salty lagoons
K1 Microbial community composition
K1 Diversity
K1 Salinity alteration
K1 16S rDNA
K1 Drought resistance
K1 2511 Ciencias del Suelo (Edafología)
K1 24 Ciencias de la Vida
AB PurposeApart from having high concentrations of salt, some natural saline wetlands also go through cyclical fluctuations in water level. They are frequently considered vulnerable habitats. In the last decades, the reduction of rainfall in many areas, coupled with fertilizer overuse, is transforming wetlands, especially in climates with a pronounced dry season. We studied a seasonally flooded saline wetland, and focused on the changes in the microbial communities.MethodsHigh-throughput sequencing was used to explore the diversity and structure of the prokaryotic communities present in the surface sediments. A water and soil salinity gradient along different lagoons in the wetland complex was observed.ResultsSalinity affected both microbial richness and composition. The highest microbial richness was observed in lagoons with lower salinity. Statistical analysis suggests that the differences in community composition were associated with differences in salinity level, although an anthropic disturbance (increasing levels of soil organic matter, SOM) that was present predominantly in one lagoon also had a noticeable effect. Sorting of samples using beta diversity distances revealed that differences among communities were due to the distinct habitats, that is, a lagoon’s salinity and SOM, not water level cycles. Differences between flooded and dry-out seasons were also explored and the linear model showed that only a small number of OTUs (2.5%) had statistical differences between seasons.ConclusionOur findings will help in understanding the effects that both salinity and drying-out periods, which are increasing problems worldwide, may have on microbial communities and their resistance to seasonal fluctuations in water levels.
PB Springer
SN 3169-3184
LK http://hdl.handle.net/10612/13683
UL http://hdl.handle.net/10612/13683
NO 1-16
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 26-abr-2024