Growth responses of Ulva prolifera to inorganic and organic nutrients: Implications for macroalgal blooms in the southern Yellow Sea, China.
Growth responses of Ulva prolifera to inorganic and organic nutrients: Implications for macroalgal blooms in the southern Yellow Sea, China.
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DOI：
10.1038/srep26498
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发表时间：
2016-05-20
影响因子：
4.6
通讯作者：
Legendre L
中科院分区：
文献类型：
--
作者：
Li H;Zhang Y;Han X;Shi X;Rivkin RB;Legendre L
海洋大型植物石莼是中国黄海南部主要的绿潮形成海藻。在这里，我们在实验室评估了浒苔对不同营养处理的生长速度和营养吸收反应。在添加有机和无机氮的培养过程中，生长速率得到提高[即。硝酸盐 (NO3−)、铵 (NH4+)、尿素和甘氨酸] 和磷 [即磷酸盐 (PO43−)、三磷酸腺苷 (ATP) 和 6-磷酸葡萄糖 (G-6-P)]，相对于对照。当富含溶解的有机氮（尿素和甘氨酸）和磷（ATP 和 G-6-P）时，浒苔的相对生长率高于无机氮（NO3− 和 NH4+）和磷（PO43−）。相反，对无机营养素的亲和力高于对有机营养素的亲和力。南黄海的现场数据显示，大型藻类生物量与溶解的有机营养物之间存在显着的负相关性。我们的实验室和现场结果表明，尿素、甘氨酸和 ATP 等有机营养物可能有助于南黄海大型藻华的发展。
The marine macrophyte Ulva prolifera is the dominant green-tide-forming seaweed in the southern Yellow Sea, China. Here we assessed, in the laboratory, the growth rate and nutrient uptake responses of U. prolifera to different nutrient treatments. The growth rates were enhanced in incubations with added organic and inorganic nitrogen [i.e. nitrate (NO3−), ammonium (NH4+), urea and glycine] and phosphorus [i.e. phosphate (PO43−), adenosine triphosphate (ATP) and glucose 6-phosphate (G-6-P)], relative to the control. The relative growth rates of U. prolifera were higher when enriched with dissolved organic nitrogen (urea and glycine) and phosphorus (ATP and G-6-P) than inorganic nitrogen (NO3− and NH4+) and phosphorus (PO43−). In contrast, the affinity was higher for inorganic than organic nutrients. Field data in the southern Yellow Sea showed significant inverse correlations between macroalgal biomass and dissolved organic nutrients. Our laboratory and field results indicated that organic nutrients such as urea, glycine and ATP, may contribute to the development of macroalgal blooms in the southern Yellow Sea.