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厦门港小型浮游生物对可溶性活性磷的吸收和再生通量 总被引：1，自引：0，他引：1
应用＾３２ＰＯ４＾３－同位素稀释技术比较研究了厦门港３个站位４个季节表层浮游生物对可溶性活性磷吸收和再生通量。结果表明,ＳＲＰ吸收和再生通量夏季最大,冬季最小;近河口的Ⅱ站ＳＰＲ一最大且季节波动性大,位于港口外缘的１站ＳＲＰ通量最小且季节波上;各站ＳＲＰ通量变化的差异与其不同的理化环境有关。文中还研究探讨了浮游生物在不同季节、不同站位对ＳＲＰ吸收和再生通量的变化特性及生态适应机制。 相似文献
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钝段螺旋藻（Ｓｐｉｒｕｌｉｎａ ｐｌａｔｅｎｓｉｓＧｅｉｔｌｅｒ）培养在低浓度ＮａＨＣＯ３（２～５ｇ／ｄｍ＾３）和适量生长素ＱＳ（０．５～５ｍｇ／ｄｍ＾３）中,研究了生长素ＱＳ对钝顶螺旋藻生长、生物量和生化组成的影响,结果表明,在生长素ＱＳ为１ｍｇ／ｄｍ＾３,ＮａＨＣＯ３浓度为５ｇ／ｄｍ＾３时,钝顶螺旋藻的生长最好,生物量、蛋白质及总碳水化合物的含量也与主浓度ＮａＨＣＯ３（８ｇ／ｄｍ＾３）培养条件下的基本相同,说明生物素ＱＳ的加入在一定程度上可降低ＮａＨＣＯ３的使用量,而不影响钝顶螺旋藻生长、生物量和生化组成。因而生长素ＱＳ在钝顶螺旋灌的养殖中可作为ＮａＨＣＯ３部分替代剂,从而达到降低养殖成本的目的。 相似文献
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氢化物-原子荧光法测定海水痕量硒及其形态 总被引：2，自引：0，他引：2
采用氢化物原子荧光法（ＨＧＡＦＳ） 测定海水痕量硒,并利用ＫＢＨ４ 对Ｓｅ（ Ⅳ） 和Ｓｅ（ Ⅵ） 的还原能力不同,以６ｍｏｌ／ｄｍ３ＨＣｌ 将海水中Ｓｅ（ Ⅵ） 还原为Ｓｅ（ Ⅳ） 再经氢化反应而测定其形态浓度。以正交设计法对ＨＧＡＦＳ法测定硒的实验条件进行优化选择。在佳化条件下本方法测定溶解态硒的检出限为０ ．０７２μｇ／ｄｍ３ ,对１ ．００μｇ／ｄｍ３Ｓｅ 浓度的样品变异系数为±２．３ ％ 。标准曲线表明,在０～２５μｇ／ｄｍ３Ｓｅ 浓度范围内有理想的线性关系。该方法可直接测定海水中的溶解态总硒、Ｓｅ（ Ⅳ） 及Ｓｅ（ Ⅵ） ,回收率为９９ ±２ ％ 。 相似文献
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３种常见的海洋浮游藻类－－扁藻、杜氏藻和牟氏角刺藻作为实验材料,采用正交方法设计实验条件,研究盐度、和光强的变化对藻类细胞内二甲基硫丙酸（ＤＭＳＰ）含量的影响。结果表明,３种藻类细胞ＤＭＳＰ含量相差很大。扁藻ＤＭＳＰ含量最高,其次为杜氏藻,牟氏角刺藻呈最低,种间差别的影响明显高于环境条件的变化对藻ＤＭＳＰ含量的影响。３种环境因陬对藻细胞ＤＭＳＰ含量的影响效果不同,盐度变化引起藻细胞ＤＭＳＰ含量的变 相似文献
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青岛西北地区矿泉水的水化学特征与形成机理 总被引：1，自引：0，他引：1
研究青岛西北部橄榄安粗岩系分布区饮用天然矿泉水形成的水文地质条件及水化学特征。指出：作为水岩反应的结果体现,其主要化学成份Ｃａ２＋、Ｍｇ２＋与Ｓｒ２＋间构成明显的成份正相关;而Ｋ＋、Ｃａ２＋、Ｍｇ２＋、ＨＣＯ－３与Ｈ２ＳｉＯ３间构成负相关,Ｓｒ２＋与Ｈ２ＳｉＯ３间亦呈负相关。并对矿泉水形成的影响因素和机理进行探讨 相似文献
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鲑科鱼类（Ｓａｌｍｏｎｉｄａｅ）中的一些种类属于加拿大的主要经济鱼类,被列为捕捞或养殖对象。Ｍｃａｌｌｉｓｔｅｒ,Ｄ．Ｅ．１９９０年报道,目前加拿大有记载的鲑科鱼类共３８种,隶属于３个亚科。亚科一白鲑亚科Ｃｏｒｅｇｏｎｉｎａｅ,共３属,２０种。１．湖白鲑Ｃ．ａｒｔｅｄｉｉ（ＬｅＳｕｅｕｒ,１８１８）２．秋白鲑Ｃ．ａｕｔｕｍｎａｌｉｓ（Ｐａｌｌａｓ,１７７６）３．鲱形白鲑Ｃ．ｃｌｕｐｅａｆｏｒｍｉｓ（Ｍｉｔｃｈｉｌｌ,１８１８）４．霍伊氏白鲑Ｃ．ｈｏｙｉ（Ｇｉｌｌ,１８７２）５．汉特斯曼氏白鲑Ｃ．… 相似文献
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由青岛沿岸潮间带表层沉积物分离出４株光合细菌，经鉴定属于荚膜红假单胞菌（Ｐｈｏｄｏｐｓｅｕｄｏｍｏｎａｓｃａｐｓｕｌａｔａ）（菌株ＨＤ３、ＲＳ、ＭＤ２）和球形红假单胞菌（Ｒｈｏｄｏｐｓｅｕｄｏｍｏｎａｓｓｐｈｅｒｏｉｄｅｓ）（菌株ＰＳ２－２）。光照厌氧培养生长实验表明ＨＤ３的最适盐度为Ｓ＝１５～２５，ＰＳ２－２为一淡水菌株。菌株ＨＤ３的最适ＰＨ范围为６．３５～８．３。ＨＤ３、ＲＳ均不能利用硫化物且其生长受较高浓度的硫化物抑制。 相似文献
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Design and Implementation of the Hydrographic Production and Management Information System (HYPAMIS)
With the development of hydrographic work and information techniques, the traditional work mode is not suitable for the Chinese Marine Safety Administration Bureau (CMSAB). Aiming at the separation of charts production and management, a new idea that is the integration of production, management, and quality control is presented. Geographic Information System (GIS), Management Information System (MIS), Office Automation (OA) and Spatial Database Management (SDM) advanced techniques are introduced into the workflows in CMSAB. To realize information sharing, a mixed mode with Browser/Server (B/S) mode and Client/Serve (C/S) mode are adopted. Based on the above ideas and strategies, an integrated system named Hydrographic Production And Management Information System (HYPAMIS) was developed. The whole workflow and three subworkflows including survey management workflow, production workflow, and quality control workflow of are outlined after re-engineering the CMSAB organization. Some design principles and key techniques of the HYPAMIS including the cooperation of GIS and MIS, object-oriented spatial data model and management, data management based on database, and security control are illustrated in detail. Then the implementation of the system is introduced briefly. Finally, performance evaluation of the system and future work is given. 相似文献
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Design and Implementation of the Hydrographic Production and Management Information System (HYPAMIS)
With the development of hydrographic work and information techniques, the traditional work mode is not suitable for the Chinese Marine Safety Administration Bureau (CMSAB). Aiming at the separation of charts production and management, a new idea that is the integration of production, management, and quality control is presented. Geographic Information System (GIS), Management Information System (MIS), Office Automation (OA) and Spatial Database Management (SDM) advanced techniques are introduced into the workflows in CMSAB. To realize information sharing, a mixed mode with Browser/Server (B/S) mode and Client/Serve (C/S) mode are adopted. Based on the above ideas and strategies, an integrated system named Hydrographic Production And Management Information System (HYPAMIS) was developed. The whole workflow and three subworkflows including survey management workflow, production workflow, and quality control workflow of are outlined after re-engineering the CMSAB organization. Some design principles and key techniques of the HYPAMIS including the cooperation of GIS and MIS, object-oriented spatial data model and management, data management based on database, and security control are illustrated in detail. Then the implementation of the system is introduced briefly. Finally, performance evaluation of the system and future work is given. 相似文献
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南大西洋在地理上连接着北大西洋、南大洋和印度洋。通过环流输运或海表温度变化,该海域的上层海洋热含量(OHC)的变化可能对与之相连的各个洋盆间的再分布产生影响。本文基于1958—2015年的ORAS4全球海洋再分析数据和中国科学院大气物理研究所的格点海温数据集,利用经验正交函数(EOF)分析、相关分析等方法,分析了南大西洋上层海洋不同积分深度(0~100 m,0~300 m,0~500 m,0~700 m)OHC的时空变化特征。EOF第一模态显示,过去60 a来,南大西洋上层700 m存在一个洋盆尺度的变暖趋势,而且随着热含量积分深度的增加,第一模态所解释的方差占比也明显增加。OHC变化EOF第一模态与以年际变化为主的NAO和ENSO指数相关性很低,而与代表较长时间变率的AMO和PDO指数却有较好相关性,且与AMO的相关性随着积分深度的增加而提高。超前滞后相关分析显示AMO滞后南大西洋OHC变化9~12 a,显示南大西洋OHC变化对北大西洋气候变化的潜在影响。南大西洋OHC变化EOF第一模态与PDO之间相关性随着积分深度的增加而降低,显示PDO对OHC的影响主要在表层。另外发现整个洋盆的热含量变化与温跃层变化呈正相关,热含量的变化反映温跃层的动态波动。 相似文献
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Shaw JP Dondero F Moore MN Negri A Dagnino A Readman JW Lowe DR Frickers PE Beesley A Thain JE Viarengo A 《Marine environmental research》2011,72(1-2):13-24
The aim of this study was to examine whether a combination of biochemical, histopathological and toxicogenomic data could be used as a valuable tool for the assessment of biological risk associated with pollutants within the Tamar River and Estuary, S.W. England, U.K. Accordingly, biochemical and histopathological biomarkers (protein carbonyls, lipofuscin, neutral lipids, lysosomal stability [N-acetyl-β-hexosaminidase and neutral red], lysosomal volume, ferric reducing antioxidant power [FRAP] and malonaldehyde [MDA]) and gene expression profiles were assessed in 5 sites from the Tamar River and Estuary (Neal Point, Town Quay, Wilcove, Cremyll Ferry and Whitsand; and a reference site, Trebarwith Strand, N. Cornwall). PAHs were measured in mussel tissue and sediment and metals were measured in mussel tissue only. Data from the biomarkers was integrated into a Mussel Expert System (MES) model to produce a simple assessment of mussel stress. Clear gradients of mussel toxicity were identified by the biomarkers (with the exception of neutral lipids) with the highest impacted animals found furthest up the Tamar, whilst the MES was unable to identify a gradient of effect. Gene expression profiles also indicated a gradient of stress with the greatest number of significantly up- or down- regulated genes found at the uppermost 2 sites. The MES did, however, determine that mussels from all sites, except the reference site, were highly stressed; a conclusion that could not be inferred from the biomarker data alone. It is concluded that the MES is a valuable tool that permits integration and interpretation of complex sets of biomarker data by identifying the biological meaning of biomarker changes. 相似文献
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The Localized Weighted Ensemble Kalman Filter(LWEnKF) is a new nonlinear/non-Gaussian data assimilation(DA) method that can effectively alleviate the filter degradation problem faced by particle filtering, and it has great prospects for applications in geophysical models. In terms of operational applications, along-track sea surface height(AT-SSH), swath sea surface temperature(S-SST) and in-situ temperature and salinity(T/S) profiles are assimilated using the LWEnKF in the northern South China ... 相似文献
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误差订正对2018年夏季次季节尺度海冰预测的作用 总被引：1，自引：1，他引：0
北极海冰次季节尺度预测在针对破冰船和商船的实际服务中十分重要,但常常受制于气候模拟的模拟能力。本研究提出了一种误差订正方法并分别应用到两个气候模式：海洋一所地球系统模式（FIOESM）和美国国家环境预报中心（NCEP）的气候预报系统（CFS）,来改善北极海冰60天尺度的预测。本研究的预测工作是中国第9次北极科学考察和2018年夏季中远集团北极商业航行的业务化海冰服务保障的重要部分。模式起报时间分别是2018年7月1日、8月1日和9月1日,预报时效均是60天。结果显示,FIOESM整体上低估了海冰密集度的数值,平均偏差可达30%。误差订正对海冰密集度（SIC）的均方根偏差（RMSE）的改进比例可达27%,对海冰外缘线（SIE）的整体偏差（IIEE）的改进比例为10%。而对于CFS,SIE在边缘区域的过高估计是其主要特点。误差订正导致了SIC的RMSE改进了7%,而对SIE的IIEE改进了17%。在海冰范围预测方面,FIOESM预测的最小范围数值和时间点都和观测接近,而CFS的预测结果偏差较大。另外和其他S2S模式的结果比较发现,本研究提出的误差订正方法对存在较大偏差的预测结果改进更为有效。 相似文献