Ash from forestal fires in coastal environments: chemical characterization and efects in microbial communities
| Autor: | Díaz-Alonso, Alexandra, Gutierréz-Barral, A. (Alberto), Justel, Maider, Fernández, Ana, Álvarez-Salgado, X.A. (Xosé Antón), Nieto-Cid, M. (Mar), Dittmar, T. (Thorsten), Osterholz, H. (Helena), Teira, E. (Eva), Fernández, E. (Emilio) |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | e-IEO. Repositorio Institucional Digital de Acceso Abierto del Instituto Español de Oceanografía instname |
| Popis: | Oral communication The frequency of bushfires will enhance as a result of increasing occurrence of extreme heat and drought periods related to global warming. A fraction of the combusted matter generated during these episodes may reach coastal ecosystems while washed away by runoff waters. Nevertheless, the nature of this material and their ecological impact on the planktonic communities remains largely unknown. In this study, we investigated the impact of large fires that occurred in Galicia (NW of the Iberian Peninsula) in October 2017, with the aim of: a) chemically characterizing the materials produced during the event reaching the adjacent coastal areas and b) experimentally assessing the response of bacteria and phytoplankton to these episodic inputs. Significant increases in the concentrations of substances of pyrogenic origin, inorganic and organic nutrients together with an almost 6-fold increase in Chl a were measured at the stations located closest to the coast coinciding with the first strong rains after the fires. Ash addition experiments carried out in summer and winter showed a positive response of bacterial abundance (1.5-fold increase) and phytoplankton Chl a (2.6-fold increase) when these communities were limited by nutrients. No negative effects of the water-soluble fraction of ash were observed in any of the experiments conducted in this study. ASLO |
| Databáze: | OpenAIRE |
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