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. 2016 Nov 22;7:1857. doi: 10.3389/fmicb.2016.01857

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Copyright © 2016 Hernández, Yannicelli, Olsen, Dorador, Menschel, Molina, Remonsellez, Hengst and Jeffrey.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Statistical multivariate principal component analysis to evaluate environmental similarity among stations including salinity, NO₂^-, PO₄^3-, and NO₃^- concentrations, chlorophyll a concentration, photosynthetic efficiency of photosystem II for microalgae (Qy450) and cyanobacteria (Qy620). Stations are plotted according to their the first and second principal component (PC) scores; environmental variables are plotted according to PC1 and PC2 coefficients; because PC scores were in the range -100 to 100, they were divided by 100 and the two coordinate systems were overlaid at the same scale (ranging from -1 to 1 for both × and y-axis). (B) Group average cluster of station similarity based on microalgae abundance data across seven stations studied.