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. 2024 Apr 30;14:9975. doi: 10.1038/s41598-024-60792-2

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Seasonal Analysis of Chl-a Concentrations in Saronikos Gulf (1997–2017): Seasonal Variations and Phenology. (a) Monthly Seasonal Cycle at Station S11, (b) Monthly Seasonal Cycle at Station S16, (c) Weekly Time Series and Phenology at Station S11, (d) Weekly Time Series and Phenology at Station S16. Shaded areas in panels (a) and (b) represent the 95% confidence interval. Vertical dashed lines in panels (c) and (d) indicate the initiation and termination of growth periods at both stations.