Greenhouse gases and biogeochemical diel fluctuations in a high-altitude wetland

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dc.contributor.authorMolina, Verónica
dc.contributor.authorEissler, Yoanna
dc.contributor.authorFernandez, Camila
dc.contributor.authorCornejo-D'Ottone, Marcela
dc.contributor.authorDorador, Cristina
dc.contributor.authorBebout, Brad M.
dc.contributor.authorRomero, Carlos
dc.contributor.authorWade H., Jeffrey
dc.contributor.authorHengst, Martha
dc.date.accessioned2022-11-30T02:46:36Z
dc.date.available2022-11-30T02:46:36Z
dc.date.issued2021
dc.description.abstractThe landscapes of high-altitude wetland ecosystems are characterized by different kinds of aquatic sites, including ponds holding conspicuous microbial life. Here, we examined a representative pond of the wetland landscape for dynamics of greenhouse gases, and their association with other relevant biogeochemical conditions including diel shifts of microbial communities' structure and activity over two consecutive days. Satellite image analysis indicates that the area of ponds cover 238 of 381.3 Ha (i.e., 62.4%), representing a significant landscape in this wetland. Solar radiation, wind velocity and temperature varied daily and between the days sampled, influencing the biogeochemical dynamics in the pond, shifting the pond reservoir of inorganic versus dissolved organic nitrogen/phosphorus bioavailability, between day 1 and day 2. Day 2 was characterized by high dissolved organic nitrogen/phosphorus and N2O accumulation. CH4 presented a positive excess showing maxima at hours of high radiation during both days. The microbial community in the sediment was diverse and enriched in keystone active groups potentially related with GHG recycling including bacteria and archaea, such as Cyanobacteria, Verrucomicrobia, Rhodobacterales and Nanoarchaeaota (Woesearchaeia). Archaea account for the microbial community composition changes between both days and for the secondary productivity in the water measured during day 2. The results indicate that an intense recycling of organic matter occurs in the pond systems and that the activity of the microbial community is correlated with the availability of nutrients. Together, the above results indicate a net sink of CO2 and N2O, which has also been reported for other natural and artificial ponds. Overall, our two-day fluctuation study in a representative pond of a high-altitude wetland aquatic landscape indicates the need to explore in more detail the short-term besides the long-term biogeochemical variability in arid ecosystems of the Andes plateau, where wetlands are hotspots of life currently under high anthropogenic pressure.en_ES
dc.facultadFacultad de Cienciasen_ES
dc.file.nameMolina_Gre2021.pdf
dc.identifier.doihttps://doi.org/10.1016/j.scitotenv.2020.144370
dc.identifier.urihttp://repositoriobibliotecas.uv.cl/handle/uvscl/7436
dc.languageen
dc.publisherElsevier
dc.rights© 2020 Elsevier B.V. All rights reserved.
dc.sourceScience of The Total Environment
dc.subjectGREENHOUSE GASESen_ES
dc.subjectDIEL DYNAMICSen_ES
dc.subjectBACTERIAen_ES
dc.subjectARCHAEAen_ES
dc.subjectHIGH-ALTITUDE WETLANDen_ES
dc.subjectMICROBIAL DIVERSITYen_ES
dc.subjectC AND N BIOGEOCHEMICAL CYCLES|en_ES
dc.titleGreenhouse gases and biogeochemical diel fluctuations in a high-altitude wetland
dc.typeArticulo
uv.departamentoInstituto de Quimica y Bioquimica
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