Version 1
: Received: 18 June 2024 / Approved: 20 June 2024 / Online: 20 June 2024 (13:01:44 CEST)
How to cite:
Monteiro, M. C.; Pereira, L. C. C.; Costa, R. M. Effects of climate events on the trophic status of an Amazonian estuary. Preprints2024, 2024061423. https://doi.org/10.20944/preprints202406.1423.v1
Monteiro, M. C.; Pereira, L. C. C.; Costa, R. M. Effects of climate events on the trophic status of an Amazonian estuary. Preprints 2024, 2024061423. https://doi.org/10.20944/preprints202406.1423.v1
Monteiro, M. C.; Pereira, L. C. C.; Costa, R. M. Effects of climate events on the trophic status of an Amazonian estuary. Preprints2024, 2024061423. https://doi.org/10.20944/preprints202406.1423.v1
APA Style
Monteiro, M. C., Pereira, L. C. C., & Costa, R. M. (2024). Effects of climate events on the trophic status of an Amazonian estuary. Preprints. https://doi.org/10.20944/preprints202406.1423.v1
Chicago/Turabian Style
Monteiro, M. C., Luci Cajueiro Carneiro Pereira and Rauquírio Marinha Costa. 2024 "Effects of climate events on the trophic status of an Amazonian estuary" Preprints. https://doi.org/10.20944/preprints202406.1423.v1
Abstract
In recent years, climate events such as Drought, El Niño, and La Niña have become increasingly frequent and more intense. Oceanographic monitoring was used to collect hydrological data in the middle and lower sectors of the Caeté estuary in different years. Negative rainfall anomalies of up to 45% were recorded during periods marked by Drought and El Niño events, which make the water of the Caeté estuary more saline and alkaline. During these events, the retention of dissolved inorganic nutrients in the middle sector appear to support increased eutrophication and more productive waters, whereas moderate eutrophication and lower productivity were observed in the lower sector. During the La Niña events, by contrast, positive rainfall anomalies may reach 60%, resulting in more oxygenated water in the estuary. In addition, the lower sector tends to more eutrophic during periods of high rainfall and freshwater discharge, as observed in this study during a La Niña event. The paucity of data on the effects of extreme climate events in Amazonian environments means that the findings of the present study may provide a useful model for the assessment of the effects of these events on other natural environments in the Amazon region.
Keywords
rainfall anomalies; hydrology; eutrophication.
Subject
Environmental and Earth Sciences, Oceanography
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
