The present research investigated the effect of pCO₂ levels (C), seawater temperature (T), and nutrient availability (N) on the growth and physiochemical changes in Pyropia haitanensis. With nutrient enrichment, the interaction of higher pCO₂ increased relative growth rates (RGR) by 105.9% when temperature increased (22 °C) compared with the control (lower T, lower C, and lower N: LTLCLN). The higher pCO₂ decreased the P_m rates at the lower temperature (18 °C), yet displayed no interaction with higher T or N levels. The higher N increased dark respiration rate (R_d) at 18 °C. At 22 °C, higher pCO₂ significantly enhanced the maximum ratio of (quantum yields (F_v/F_o) and the maximum quantum yield (ψ_po), while it sharply decreased the absorption of photons per active reaction center (ABS/RC) and dissipation of energy fluxes (per RC) (DI_o/RC). Higher temperature obviously reduced the F_v/F_o and ψ_po under ambient CO₂ level. The higher pCO₂ significantly increased the phycoerythrin (PE) and phycocyanin (PC) contents, while higher temperature decreased the PE contents with elevated CO₂ and declined the PC content regardless of CO₂ condition. At lower nutrient condition, higher pCO₂ increased Chl a content. Soluble carbohydrates (SC) and soluble protein (SP) content almost was unchanged among all treatments. Our findings indicate that nutrient availability may regulate photosynthetic mechanism to offset the negative effect of future ocean warming on P. haitanensis, thereby sustaining or increasing the biomass yield of the algae.

本研究调查了p CO ₂水平（C），海水温度（T）和养分有效性（N）对海丹拟南芥生长和理化变化的影响。随着营养物的富集，与对照（较低的T，较低的C和较低的N：LTLCLN）相比，温度升高（22°C）时，较高的p CO ₂相互作用使相对生长速率（RGR）增加了105.9％。较高的p CO ₂在较低的温度（18°C）下降低了P _m速率，但与较高的T或N水平无相互作用。较高的氮增加了暗呼吸速率（R _d）在18°C下。在22℃，更高的p CO ₂显著增强的（量子产率（最大比˚F _v / ˚F _ö）和最大的量子产率（ψ _PO），而它急剧减少单位反应中心的光子的吸收（ABS / RC）和能量通量的耗散（每RC）（DI _ø / RC）。较高的温度明显降低的˚F _v / ˚F _ö和ψ _PO在环境CO ₂水平。越高p CO ₂不论CO ₂条件如何，较高的温度都会显着增加藻红蛋白（PE）和藻蓝蛋白（PC）的含量，而较高的温度会随着CO ₂升高而降低PE含量，并降低PC含量。在较低的营养条件下，较高的p CO ₂增加叶绿素一个内容。在所有处理中，可溶性碳水化合物（SC）和可溶性蛋白质（SP）含量几乎没有变化。我们的发现表明，养分的可利用性可能调节光合作用机制，以抵消未来海洋变暖对海坛松的负面影响，从而维持或增加藻类的生物量产量。