Figure 4. Impact of ocean warming (+4 °C) and acidification (ΔpH = 0.4) on Zostera noltii.

(a) Auroxanthin; (b) antheraxanthin; (c) violaxanthin; (d) β-carotene; (e) luteín and (f) zeaxanthin contents (μg g⁻¹ ww). Values represent mean ± SD [(n = 40 per experimental treatment (i.e., n = 10 per replicate system (n = 4), per experimental treatment)]. Different letters represent statistical differences between temperature and pH treatments, following a significant interaction (p < 0.013). Abbreviations: μg: microgram; g: gram; ww: wet weight.