| 摘要: |
| 于1985年8月-1986年12月和1991年5月-1993年11月通过对胶州湾表层海水营养盐的调查，根据Justic等（1995）建立的浮游植物生长的化学计量及可能营养盐限制因素标准，并结合海洋硅藻正常所需的Si，N，P之间的原子比，用数学统计的方法研究了胶州湾表层海水营养盐结构。结果表明，含有丰富溶解无机氮和磷的胶州湾，Si:P的值有了显著的下降，同时Si:DIN和DIN:P的值也表现出下降的趋势，使胶州湾水域营养盐结构发生了明显的变化。胶州湾由于受人类活动的影响，近年来浮游植物生长受溶解无机硅制约的可能性显著增大。 |
| 关键词: 胶州湾 营养盐 富营养化 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院重大项目资助，KY85-08号 |
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| A STUDY OF CHANGES IN NUTRIENT STRUCTURE OF JIAOZHOU BAY |
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Zhang Junshun, Shen Zhiliang
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Institute of Oceanology , Chinese Academy of Sciences, Qingdao 266071
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| Abstract: |
| Some months’ nutrients in Jiaozhou Bay in the mid-1980s and early 1990s were determined. According to Justic's criteria for stoichiometric and probable nutrient limitations, and the atomic Si:N:P ratios of marine diatoms, we analyzed extensive nutrient data sets from Jiaozhou Bay. The main results were as follows: First, silicon: phosphorus ratios in surface waters of Jiaozhou Bay decreased significantly from the mid-1980s to the early 1990s, while silicon: nitrogen and nitrogen: phosphorus ratios also decreased. Secondly, the relative frequency of probable silicon limitation in the mid-1980s was about 36.6%, but increased to about 69.6% in the early 1990s. On the other hand, because dissolved inorganic nitrogen and phosphorus concentrations were higher, relative frequency of nitrogen and phosphorus limitations in Jiaozhou bay was zero or nearly zero from the mid-1980s to the early 1990s. Consequently, we believed that the nutrient structure in Jiaozhou Bay surface waters underwent significant changes, and the potential for silicon limitation in Jiaozhou Bay increased. |
| Key words: Jiaozhou Bay, Nutrients, Eutrophication |
