中国海洋大学学报（自然科学版）2026，Vol.56Issue(6)：66-77,12.DOI:10.16441/j.cnki.hdxb.20250210
磷限制对莱州湾浮游植物碳氮磷化学计量特征影响的实验研究
Study on the Effects of Phosphorus Limitation on the Stoichiometric Characteristics of Carbon,Nitrogen and Phosphorus in Phytoplankton in Laizhou Bay
摘要
Abstract
The study was conducted in the Laizhou Bay,a region characterized by high nitrogen levels,low phosphorus levels,and severe phosphorus limitation.Through in-situ mesocosm experiments regu-lated by nitrogen-to-phosphorus ratios and laboratory cultivation experiments of different phytoplankton types,the stoichiometric characteristics of phytoplankton under varying N/P conditions were analyzed.The results indicate that phytoplankton in Laizhou Bay exhibit flexible absorption of nitrogen and phos-phorus nutrients.Under non-phosphorus-limited conditions,phytoplankton absorb nutrients essentially according to the Redfield ratio(16∶1),and the intracellular ratios of particulate organic carbon(POC)to particulate nitrogen(PN)to particulate phosphorus(PP)closely approximate the Redfield ratio(106∶16∶1).Under phosphorus-limited conditions,phytoplankton luxuriously absorb and assimilate nitrogen,leading to intracellular POC/PN ratios lower than the Redfield ratio,while POC/PP and PN/PP ratios become higher than the Redfield ratio.Furthermore,as the N/P ratio increases,the POC/PN ratio decreases,whereas the POC/PP and PN/PP ratios increase.Phosphorus limitation causes an im-balance in the intracellular POC/PN/PP ratios of phytoplankton,resulting in an increase in high-carbon substances within the cells and a reduction in carbon assimilation efficiency.关键词
莱州湾/磷限制/浮游植物/化学计量比/围隔实验Key words
Laizhou Bay/phosphorus limitation/phytoplankton/stoichiometric ratios/mesocosm expe-riment分类
海洋科学引用本文复制引用
夏旦琳,王友华,段晓萌,张明政,李宏观,梁生康,王修林..磷限制对莱州湾浮游植物碳氮磷化学计量特征影响的实验研究[J].中国海洋大学学报（自然科学版）,2026,56(6):66-77,12.基金项目
国家自然科学基金项目(42576040) （42576040）
崂山实验室科技创新项目(LSKJ202203901) （LSKJ202203901）
山东省重点研究发展项目(2022QNLM040002) （2022QNLM040002）
中央高校基本科研业务费专项(20247200)资助Supported by the National Natural Science Foundation of China(42576040) （20247200）
the Laoshan Laboratory Science and Technology Innova-tion Project(LSKJ202203901) （LSKJ202203901）
the Key Research and Development Project of Shandong Province(2022QNLM040002) （2022QNLM040002）
the Special Fund for Basic Scientific Research Business Expenses of Central Universities(20247200) （20247200）
