Ordination diagram displaying the first and second axes of principal components analysis (PCA).

<p>Loadings of the environmental and biological variables (DIN, dissolved inorganic nitrogen; P, dissolved inorganic phosphorus; Dino, Dinoflagellate; Cyano, cyanobacteria(mainly <i>Trichodesmium</i> spp.); Pico, Pico-size Chla; Nano, Pico-size Chla; Micro, Micro-size Chla) are displayed as blue line; the scheme for temporal variation of water parameters of samples depending on the scores of the first two principal components.