浮游植物
海水
有一固定的比值
生物地球化学循环
营养物
海湾
营养水平
环境化学
生态系统
营养循环
初级生产者
富营养化
环境科学
生态化学计量学
海洋学
生态学
化学
生物
地质学
作者
Xiaoqian Lu,Wei Ma,Bin Chen,Zhiyuan Ma,Guangcheng Chen,Feiyang Ge,Shenqun An,Wenxuan Han
标识
DOI:10.1016/j.marpolbul.2022.114566
摘要
Anthropogenic activities dramatically alter biogeochemical cycling and stoichiometry of carbon (C), nitrogen (N), and phosphorus (P) within coastal marine ecosystems. Long-term nutrient input has led to significant deviation of the C, N and P stoichiometry of phytoplankton (C167N28P1) and surface seawater (C1299N24P1) from the Redfield ratio (C106N16P1), and overall P-limitation in Xiamen Bay. The bio-P in phytoplankton was spatially consistent with that of inorganic P in seawater; and the phytoplankton bio-C:N:P shifted towards the same trend as the seawater under prolonged nutrient stress, as one of the cascade effects of the imbalanced seawater elemental stoichiometry on the species composition and abundance, and in turn on bio-elemental stoichiometry, of phytoplankton community. It is suggested that the significant deviations in elemental stoichiometry of primary producers might impair their capacity of nutrient supply for organisms at higher trophic-levels of the food chains in the local coastal ecosystem and thus damage its health.
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