Spatial distribution of primary production off Sanriku, northwestern Pacific, during spring estimated by Ocean Color and Temperature Scanner (OCTS)

An algorithm to estimate primary production by chlorophylla and sea surface temperature from satellite was evaluated with primary production data from the Ocean Color and Temperature Scanner (OCTS) Sanriku field campaign. The algorithm was applied to the data of OCTS on the Advanced Earth Observing Satellite (ADEOS) off Sanriku, North Pacific, on April 26, 1997. The wavelength-, time-, and depth-resolved model reasonably estimated the chlorophyll-specific primary production of each depth and water column integrated primary production. Although the model parameters were adjusted with the photosynthesis-irradiance curves obtained in the region, the resultant primary production was not significantly different from the global model of Antoine and Morel (1996). This is probably because there is considerable variability in the physiological parameters in this limited area, off Sanriku, and in the limited time, spring. Estimated integrated primary production was well correlated with chlorophylla but not with temperature. This indicates that the temperature dependence of the primary production was less than the variability caused by chlorophylla concentration.     

Studies on primary productivity model in shallow mixed waters

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海洋初级生产过程中原核生物和真核生物的作用

于１９９２年８月－１９９３年５月，运用生物抑制剂方法和＾１４Ｃ，＾１５Ｎ同位素示踪方法研究胶州湾表层水中小于２００μｍ的浮游生物群落中原核生物和真核生物对初级生产力的贡献，以及在硝态氮（ＮＯ３＾－－Ｎ）、氨态氮（ＮＨ４＾＋－Ｎ）和氨基酸氮（ＡＡ－Ｎ）吸收中的作用。结果表明，原核生物在总初级生产力中占有相当比重（１６．３８％－４１．００％），ＮＯ３＾－－Ｎ主要由真核生物所吸收（６４．８６％－８７．２     

欧巴拉格铜金矿床成矿地质、物化探模型研究

在总结欧巴拉格铜金矿床地质、地球物理和地球化学特征的基础上,进行了物探激电中梯和化探原生晕剖面的试验研究,认为物探ηｓ异常的基本形态和分布规律与矿区主要断裂带展布规律一致,在３．５％以上的异常范围内有铜金隐伏矿体的存在;化探Ｃｕ、Ａｕ、Ａｇ、Ｂｉ元素组合异常为隐伏铜金矿体晕显示。表明铜金矿床的形成受构造控制的次火山岩热液作用,从而建立了欧巴拉格铜金矿床成矿地质、物化探模型。     

碎屑岩成岩过程中各种造岩矿物溶解特征的热力学模型

不同温压条件下,与碎屑岩在成岩过程中各种造岩矿物溶解相关的7个反应吉布斯自由能增量(ΔG)和平衡常数(K)的计算结果说明:各种造岩矿物(钾长石、钠长石、钙长石以及铁镁暗色矿物中的辉石、角闪石等)在成岩过程中的稳定性都较弱、抗溶蚀能力不高;铁镁暗色矿物和中-基性斜长石在碎屑岩的成岩条件酸性介质中,比酸性斜长石和碱性长石更易发生溶解形成次生溶蚀孔隙,为油气的储集和运移提供空间和通道.     

抚顺东部地区太古宙花岗质侵人体的地质特征及成因

抚顺东部地区太古宙花岗质侵入体为一套组成较复杂的大陆弧花岗岩,包括紫苏花岗岩和TTG岩系,具有奥长花岗岩及钙碱性双重演化趋势,形成于晚太古代大陆边缘或大陆弧环境中,其成因直接导源于古老的板块俯冲运动及区域变质变形作用,侵位机制属于主动型岩浆底辟作用。     

山东金青顶金矿床的叠加晕模式

金青顶为一大型石英脉型金矿床。１９８７年研究了－４００ｍ标高以上矿体原生晕特点,预测Ⅱ号矿体向下有很大延深,经钻探证实矿体延深到－７００ｍ,表明金青顶金矿床Ａｕ元素具有多中心富集和多阶段成矿成晕叠加特点,从而建立金青顶金矿床的叠加成矿成晕模式,表明在有Ａｕ异常存在条件下,Ａｓ、Ｈｇ、Ｓｂ前缘晕元素异常指示深部存在盲矿体;当前缘晕指示元素Ａｓ、Ｈｇ、Ｓｂ异常与尾晕元素Ｂｉ、Ｍｏ、Ｍｎ异常共存,指示矿体向下延深较大。－７００ｍ处叠加晕的显示,表明矿体仍向深部延伸,１９９７年钻探控制了－９００ｍ,矿体还未尖灭。     

^14C标记现场测定海洋初级生产力培养方法比较

以大亚湾和台湾海峡的实测数据为依据，认为培养过程中的搅动十分重要。对比＾１４Ｃ测定初级生产力的几种培养方法，结果表明，悬挂式现场培养法比较可靠，但其应用受到一定限制；旋转培养法与悬挂式现场培养法结果相近，又可在甲板上进行，值得推广；静置培养法由于培养过程中缺乏搅动，数据不稳，结果偏低，不宜采用。２４ｈ连续悬挂式现场培养法的结果及计算机对培养过程的模拟指出，新固定的碳可快速损失，因此培养时间不宜超过     

Primary Production and Growth Dynamics in Posidonia oceanica

Abstract. Studies on leaf growth and production were performed in two stands, at depths of 5 m and 22m, in the Posidonia oceanica (L.) D elile bed off Lacco Ameno, Ischia (Gulf of Naples). Experiments were carried out in situ from May 1988 to August 1989 at monthly intervals.
Leaf growth and production profiles differed in the two stands investigated. Growth rates were higher at 5 m, with a peak in autumn (5.8 mg · shoot^-1· d^-1) and another in March (3.8 mg · shoot^-1· d^-1). At 22 m the maximum rate occurred in May (3.9 mg · shoot^-1· d^-1). These differential growth rates resulted in a delayed maximum leaf surface and biomass at the deep stand, where lower irradiance values and different temperature patterns were also found. The biomass of epiphytic algae showed trends similar to those of leaves; however, there were remarkable differences in the values between the two stations and for the two investigated years.
The production data of the present study are compared with those of other reports, and it is shown that growth processes are greatly influenced by physical factors.