2024-03-29T08:13:07Zhttp://buleria.unileon.es/oai/requestoai:buleria.unileon.es:10612/136832021-11-23T01:00:20Zcom_10612_17col_10612_18
Prokaryotic community diversity in the sediments of saline lagoons and its resistance to seasonal disturbances by water level cycles
Sáenz de Miera Carnicer, Luis Enrique
Gutiérrez González, Juan J.
Arroyo Hernández, Paula
Falagán Fernández, Jorge
Ansola González, Gemma
Genetica
Facultad de Ciencias Biologicas y Ambientales
Biología
Botánica
Ecología. Medio ambiente
Salty lagoons
Microbial community composition
Diversity
Salinity alteration
16S rDNA
Drought resistance
2511 Ciencias del Suelo (Edafología)
24 Ciencias de la Vida
1-16
Purpose
Apart 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.
Methods
High-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.
Results
Salinity 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.
Conclusion
Our 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.
SI
2021-07-21
info:eu-repo/date/embargoEnd/2022-07-27
2021-11-22T11:18:58Z
2021-11-22T11:18:58Z
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
3169-3184
https://link.springer.com/article/10.1007/s11368-021-03026-6
http://hdl.handle.net/10612/13683
https://doi.org/10.1007/s11368-021-03026-6
eng
info:eu-repo/semantics/openAccess
CCBY
Springer