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光照时间和水温对浮游植物生长影响的初步剖析——以胶州湾为例 总被引：7，自引：0，他引：7
能语言是一般描述系统的一种方法 ,因为所有现象都伴随着能的转化［６］。整个世界生态系统的功能几乎毫无例外地取决于海洋植物光合作用固定的能量。其中 ,最大量的能量是由生活在海洋有光照的表层水中的微小浮游植物固定的［８］。因此 ,作者以胶州湾为例 ,尝试考虑太阳的热能给水体的能量输入及对水体生态系统浮游植物的生长过程的影响 ,认为光不仅是浮游植物的光合作用的能源而且是水体贮藏热能来提高水温的来源。本文用模型框图进行分解讨论光照时间、水温对浮游植物生长的影响过程 ,以阐释胶州湾光照时间、水温影响初级生产力时空变化… 相似文献
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The phytoplankton reproduction capacity (PRC), as a new concept regarding chlorophyll-a and primary production (PP) is described. PRC is different from PP, carbon assimilation number (CAN) or photosynthetic rate ( P^B ) . PRC quantifies phytoplankton growth with a special consideration of the effect of seawater temperature. Observation data in Jiaozhou Bay, Qingdao, China, collected from May 1991 to February 1994 were used to analyze the horizontal distribution and seasonal variation of the PRC in Jiaozhou Bay in order to determine the characteristics, dynamic cycles and trends of phytoplankton growth in Jiaozhou Bay; and to develop a corresponding dynamic model of seawater temperature vs. PRC. Simulation curves showed that seawater temperature has a dual function of limiting and enhancing PRC. PRC‘s periodicity and fluctuation are similar to those of the seawater temperature. Nutrient silicon in Jiaozhou Bay satisfies phytoplankton growth from June 7 to November 3. When nutrients N, P and Si satisfy the phytoplankton growth and solar irradiation is sufficient, the PRC would reflect the influence of seawater temperature on phytoplankton growth. Moreover, the result quantitatively explains the scenario of one-peak or two-peak phytoplankton reproduction in Jiaozhou Bay, and also quantitatively elucidates the internal mechanism of the one- or two-peak phytoplankton reproduction in the global marine areas. 相似文献
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ＩＮＴＲＯＤＵＣＴＩＯＮＮａｎｄＰｉｎｐｕｔｔｅｄｉｎｔｏＪｉａｏｚｈｏｕＢａｙｂｙｒｉｖｅｒｓａｎｄｂｙｓｅｗａｇｅｅｆｆｌｕｅｎｔｓｏｆｃｉｔｉｅｓ ,ｈａｖｅｍａｄｅｔｈｅＢａｙｂｅｃｏｍｅｍｏｒｅａｎｄｍｏｒｅｅｕｔｒｏｐｈｉｃｄａｙｂｙｄａｙ .Ｓｈｅｎ ( 1994)ｔｈｏｕｇｈｔｔｈａｔｐｈｙｔｏｐｌａｎｋｔｏｎｇｒｏｗｔｈｗａｓｌｉｍｉｔｅｄｂｙｔｈｅｃｈａｎｇｅｆｒｏｍｎｉｔｒｏｇｅｎｔｏｐｈｏｓｐｈｏｒｏｕｓ ;ａｎｄｔｈａｔｔｈｅｓｉｌｉｃａｔｅｃｏｎｃｅｎｔｒａｔｉｏｎｉｎＪｉａｏｚｈ… 相似文献
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Silicon limitation on primary production and its destiny in Jiaozhou Bay, China V： Silicon deficit process 总被引：1，自引：0，他引：1
Silicon is a necessary nutrient for diatoms, silicon uptake in diatom reproduction decreased seawater silicon content. This paper clarified the characteristics of silicon transferring in the sea, which plays an important role in phytoplankton growth, zooplankton graze and marine ecosystem. Analysis revealed that silicate is supplied by terrestrial sources, through plankton uptake, death, and eventually deposits to the sea bottom, and cannot diffuse upward. This is a general silicon deficit process. Many global marine waters showed the same silicon transfer route: land→silicon biogeochemical process→sea bottom. River flow brings abundant silicate into marine waters, silicate concentration in the waters decreased in the distance away from the river estuaries. In discussion of silicon characteristics and its transfer route, it was considered that the main factor controlling the mechanism of diatom and non-diatom red tides occurrence is silicon, and the changes in silicon source. Human activities, such as sea-route cutting by building embankment and dam, and silicon supplement by the sea, such as sandstorm, rainstorm and storm tide, have largely impaired the earth ecosystem and hugely threatened the human existence. It is suggested in this paper that man should resume the original face of the Si input into the sea to keep natural ecosystem in sustainable pattern. 相似文献
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Silicon limitation on primary production and its destiny in Jiaozhou Bay,China V:Silicon deficit process 总被引：1，自引：0，他引：1
1 INTRODUCTION Land-sourced silicon are continuously input into the sea by rivers. After being assimilated by thousands of living organisms in the sea, silicon sinks with the marine living organisms to the sea bottom, showing a complete silicon transfer process. The study of this dynamic process need clarifying the characteristics of silicon in the sea, which plays an important role in phytoplankton growth, zoo-plankton graze and marine ecosystem. 2 SILICON BEING INDISPENSABLE N… 相似文献
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用海项目的海域使用论证是海域管理的重要技术支撑,其质量控制具有非常重要的意义。文章主要根据笔者的论证实践和学习体会,对海域使用论证质量控制的关键环节问题进行了详细阐述。内容主要包括：在论证的前期阶段,要重视质量控制的起始环节,如论证资金的管理、项目的实地考察以及论证大纲的前期策划等;在论证的中期阶段,要对论证报告书质量严格控制;在论证的后期阶段,专家组评审要严格把关,海洋主管部门要进行严格审批,此外建议开展海域使用后评价研究,以加强项目审批后的监督管理,维护国家海域所有权,促进海洋资源的可持续利用和合理用海。 相似文献
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