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Effects of pollution and environmental disturbance

机译:污染与环境干扰的影响

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Ocean acidification (OA), which is a major environmental change caused by increasing atmospheric CO2, has considerable influences on marine phytoplankton. But few studies have investigated interactions of OA and seasonal changes in temperature and photoperiod on marine diatoms. In the present study, a marine diatom Skeletonema costatum was cultured under two different CO2 levels (LC, 400 uatm; HC, 1000 uatm) and three different combinations of temperature and photoperiod length (8 V 16 L V D with 5 C, 12 V 12 L V D with 15 C, 16 V 8 L V D with 25 C), simulating different seasons in typical temperate oceans, to investigate the combined effects of these factors. The results showed that specific growth rate of S. costatum increased with increasing temperature and day length. However, OA showed contrasting effects on growth and photosynthesis under different combinations of temperature and day length: while positive effects of OA were observed under spring and autumn conditions, it significantly decreased growth (11 %) and photosynthesis (21 %) in winter. In addition, OA alleviated the negative effect of low temperature and short day length on the abundance of RbcL and key photosystem Ⅱ (PSII) proteins (D1 and D2). These data indicated that future ocean acidification may show differential effects on diatoms in different clusters of other factors.
机译:海洋酸化(OA)是由于大气二氧化碳增加引起的主要环境变化,对海洋植物植物植物的影响具有相当大的影响。但是,很少有研究在海洋硅藻中研究了OA和季节性变化的相互作用。在本研究中,在两种不同的CO 2水平(LC,400 UATM; HC,1000 UATM)和温度和光周期长度的三种不同组合下培养了海洋硅藻骨骨型蛋白质(LC,400 UATM),(8 V 16 LVD,12 V 12,12 vd 12 LVD含有15℃,16 V 8 LVD,25℃),模拟典型的温带海洋中的不同季节,探讨这些因素的综合影响。结果表明,S.Stautum的特定生长速率随着温度和日期的升高而增加。然而,OA在温度和日长度的不同组合下对生长和光合作用进行了对比作用:虽然在春季和秋季条件下观察到OA的积极作用,但在冬季的增长(11%)和光合作用(21%)显着降低。此外,OA减轻了低温和短日长度对RBCL和关键照相Ⅱ(PSII)蛋白(D1和D2)的负面影响。这些数据表明,未来的海洋酸化可能对其他因素的不同簇的硅藻表示差异影响。

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    《Oceanographic Literature Review》 |2021年第4期|874-880|共7页
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