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Estimating Synechococcus spp. growth rates and grazingpressure by heterotrophic nanoplankton in theEnglish Channel and the Celtic Sea

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Acta Oceanologica Sinica 1992年第2期11卷 255-273页

作者： ning xiuren and Daniel Vaulot

-Marine chroococcoid phycoerythrin - containing Synechococcus spp. recently have been implicated as a substantial component of the photosynthetic picoplankton in the ocean. Although the importance of Synechococcus as food sources for heterotrophic nanoplankton are now recognized, the information about its cycling of biomass and diel patterns is limited and the methodology used varies according to different authors. A selective metabolic inhibitor method was used to allow simultanous estimation of both growth rates and grazing disappearance rates of Synechococcus. Results obtained in the English Channel show growth rates ranging from 0. 25 to 0. 72 d-1 with an average value of 0. 51 d -1and grazing disappearance rates ranged from 0. 21 to 0. 64 d-1 (mean = 0. 44 d-1). Offshore in the Celtic Sea of the Northeast Atlantic Ocean, both rates were lower than in the channel. The similarity between average growth and grazing rates suggests a rapid recycling of Synechococcus biomass. In diel pattern, Synechococcus grazing mortality rates were higher during the day (mean = 0. 61 d-1) than during the night (mean = 0. 21d-1) in all the experiments. A positive correlation was observed between growth rates and in situ temperature ranged from 9 to 20 ℃. Sire-fractionated experiments demonstrate that up to about 7 0 % of Synechococcus disappearance could be attributed to the grazer smaller than 2 μm in diameter. The variations of Synechococcus cell characteristics such as size and phycoerythin contents in the growth and grazing experiments were determined with a flow cytometer. The methodology recently used on estimating dynamics of Synechococcus population is reviewed.

关键词： Estimating Synechococcus spp growth rates and grazingpressure by heterotrophic nanoplankton in theEnglish Channel and the Celtic Sea

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The patterns of distribution of chlorophyll a and primary production in coastal upwelling area off Zhejiang

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海洋学报(英文版) 1988年第1期7卷 126-136页

作者： ning xiuren and Liu Zilin State Oceanographic Administration Hangzhon China. China

-Investigations of Chi, a and primary production were carried out in the coastal upwelling area (27°’-30°30’N, west to 124°00’E) off Zhejiang in August and October 1981. The high-value areas of Chl. a were in nearshore waters and on top of the upwelling front, where Chl. a occurred the maximum 7.40 mg/m3. With the average of 1.25 g C/m2.d, the primary production was more than 2.0gC/m2·d incenteral area of the upwelling, and the whole surveyed area’s output was about 4.4 ×104 tons C/d.

关键词： chlorophyll coastal surveyed salinity waters productivity varied Photosyn photosynthetic nutrients

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Standing Crop and Primary Production of Benthic Microalgae on the Tidal Flats in Yueqing Bay

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Journal of Ocean University of China 2011年第2期10卷 157-164页

作者： HAO Qiang CAI Yuming ning xiuren LIU Chenggang PENG Xin TANG Xuexi College of Marine Life Sciences Ocean University of China Qingdao 266003 P. R. China Second Institute of Oceanography State Oceanic Administration （ SOA Hangzhou 310012 China） SOA Key Lab of Marine Ecosystem and B iogeochemistry Hangzhou 310012 China Zhejiang Mariculture Research Institute Wenzhou 325000 China

The standing stock and primary production of benthic microalgae on tidal flats were measured seasonally at 3 transects (Puqing, Dahengchuang and Puqi) in Yueqing Bay during 2002 2003. The results showed that the integral chlorophyll a (Chl a) concentration in tidal flat mud exhibited a seasonal variation with the order of magnitude: winter (14.0 4.2 mg m-2) > spring (13.0 6.3 mg m-2) > autumn (7.7 5.9 mg m-2) > summer (4.6 3.2 mg m-2). The primary production showed an order of magnitude: spring (270.5 224.9 mgC m-2 d-1)>winter (238.7 225.5 mgC m-2 d-1)>autumn (214.1 56.2 mgC m-2 d-1)>summer (71.6 44.6 mgC m-2 d-1). Both chlorophyll a and primary production showed maximum values in the surface layer of sediment, and decreased rapidly with increasing depth due to sun light limitation. The results of variance analysis indicated that seasonal variation and tidal flat condition affected Chl a greatly, but had no significant effect on primary production. The annual primary production of benthic microalgae on tidal flats in Yueqing Bay was estimated at 16143 tons carbon, which is sufficient to support 1.02×105 tons shellfish production. The environmental factors affecting chlorophyll and primary production on the tidal flats in Yueqing Bay were discussed. By comparing with other bays on China's coast, it was observed that Yueqing Bay is a region with high benthic microalgae standing crop and primary production, which may be related to the type of its sediment.

关键词： chlorophyll a primary production benthic microalgae tidal flat Yueqing Bay

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Standing stock of phytoplankton and primary productivity in Penaeus orientalis larval multiplication releasing area of the Xiangshan Bay

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Acta Oceanologica Sinica 2000年第1期19卷 109-118页

作者： Liu Zilin Cai Yuming Shi Junxiang ning xiuren (1. Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China) Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China

The standing stock of phytoplankton (phy. ) and primary productivity (pp) in the Xiangshan Bay were observed in 1992. The results showed higher biological parameters in the bay. The average chlorophyll a (chl a) concentration was (3. 50 5. 93 ) mg/m3 and the primary productivity (444. 5 871. 0) mg/(m2 d). The distribution of chl a and productivity showed distinct spatial and temporal patterns in the bay. The continent influence was Obvious at the top of the bay, lower seawater exchange and higher stability led to higher standing stock of phytoplankton and productivity. At the bay mouth, seawater exchanged continuously with adjacent waters by rapid currents, resulting in fast and unstable exchange and lower standing stock of phytoplankton and primary productivity. The seasonal characters of those parameters were pronounced, in the sequence of spring, summer, autumn and winter. The results of size--fractionated showed that the average contribution of the nano--and picoplankton (< 20pm) to total chl a and productivity were 75 % and 87%, respectively, indicating their importance in phytoplankton community biomass and productivity of the Xiangshan Bay.

关键词： Standing stock phytoplankton chl a primary productivity size-fractionated Xiangshan

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Community structure of picoplankton abundance and biomass in the southern Huanghai Sea during the spring and autumn of 2006

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Acta Oceanologica Sinica 2010年第1期29卷 58-68页

作者： LE Fengfeng ning xiuren LIU Chenggang HAO Qiang SHI Junxian Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China State Key Laboratory of Satellite Ocean Environment Dynamics Hangzhou 310012 China Key Laboratory of Marine Ecosystems and Biogeochemistry of State Oceanic Administration Hangzhou 310012 China

During spring and autumn of 2006, the investigations on abundance, carbon biomass and distri- bution of picoplankton were carried out in the southern Huanghai Sea （Yellow Sea, sHS）. Three groups of picoplankton-Synechococcus （Syn）, Picoeukaryotes （PEuk） and heterotrophic bacteria （BAC） were identified, but Prochlorococcus （Pro） was undetected. The average abundance of Syn and PEuk was lower in spring （5.0 and 1.3×10^3 cells/cm^3, respectively） than in autumn （92.4 and 2.7×0^3 cells/cm^3, respectively）, but it was opposite for BAC （1.3 and 0.7×10^6 cells/cm^3 in spring and autumn, respectively）. And the total carbon biomass of picoplankton was higher in spring （37.23×11.67） mg/m^3 than in autumn （21.29×13.75） mg/m^3. The ratios of the three cell abundance were 5：1：1 341 and 30：1：124 in spring and autumn, respectively. And the ratios of carbon biomass of them were 5：7：362 and 9：4：4 in spring and autumn, respectively. Seasonal distribution characteristics of Syn, PEuk, BAC were quite different from each other. In spring, Syn abundance decreased in turn in the central waters （where phytoplankton bloom in spring occurred）, the southern waters and inshore waters of the Shandong Peninsula （where even Syn was undetected）; the high values of PEuk abundance appeared in the central and southern waters and the inshore of the Shandong Peninsula; the abundance of BAC was nearly three order of magnitude higher than that of photosynthetic picoplankton, and high values appeared in the central waters. In autumn, Syn abundance in central waters was higher than that in surrounding waters, while for PEuk abundance, it decreased in turn in the inshore waters of the Shandong Peninsula, the southern waters and the central waters; BAC presented a complicated blocky type distribution. Sub-surface maximum of each group of picopalnkton appeared in both spring and autumn. Compared with the available lit- eratures concerning the studied area, the range of Syn abundance was larger, and the abunda

关键词： southern Huanghai Sea photosynthetic picoplankton heterotrophic bacteria abundance and carbon biomass distribution

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Bacterioplankton production in dilution zone of the Changjiang (Yangtze) Estuary

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Acta Oceanologica Sinica 2001年第1期20卷 131-139页

作者： Liu Zilin 1,2 , Koshikawa Hiroshi 3, ning xiuren 1,2 , Shi Junxian 2, Cai Yuming 1,21.KeyLaboratoryofSubmarineGeosciences,StateOceanicAdministration,China2.SecondInstituteofOceanography,StateOceanicAdministration,Hangzhou310012,China3.Nationa Key Lab. of Submarine Geosciences State Oceanic Administration China Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China National Institute for Environmental Studies Tsukuba 305-0053 Japan

The bacterioplankton production and bacterioplankton abundance were surveyed in dilution zone of the Changjiang Estuary and a mesocosm experimental device for enriched phosphate experiment and oil contaminated experiment was placed in the waters nearby Luhua Island during October 1997 and May 1998. The results showed that the average bacterioplankton production in spring was higher than that in autumn, the production at the surface water was higher than that at the bottom in the surveyed area; the higher values appeared in the middle of the area. The results from mesocosm experiment with adding phosphate and oil contaminated showed that the bacterioplankton production increased rising trend day by day during the experiment period.

关键词： Bacterioplankton production estuary the Changjiang River

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海洋浮游植物溶解有机碳释放研究进展

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地球科学进展 2010年第2期25卷 123-132页

作者：刘诚刚宁修仁郝锵乐凤凤中国海洋大学山东青岛266003 卫星海洋环境动力学国家重点实验室浙江杭州310012 国家海洋局海洋生态系统与生物地球化学重点实验室浙江杭州310012 国家海洋局第二海洋研究所浙江杭州310012

溶解有机碳(DOC)是海洋中最大的有机碳库,其中化学性质不稳定的成分大部分来自海洋浮游植物的释放。简要回顾了浮游植物溶解有机碳释放研究的发展历史,从光合作用合成的溶解有机碳(PDOC)释放占初级生产力的比重,PDOC的化学组成,浮游植物... 详细信息

溶解有机碳(DOC)是海洋中最大的有机碳库,其中化学性质不稳定的成分大部分来自海洋浮游植物的释放。简要回顾了浮游植物溶解有机碳释放研究的发展历史,从光合作用合成的溶解有机碳(PDOC)释放占初级生产力的比重,PDOC的化学组成,浮游植物DOC释放的途径与机制,PDOC释放的环境调控,浮游植物群落组成对PDOC释放的影响,以及浮游植物释放DOC对异养细菌的生态意义等方面对相关研究进行了综述和分析。讨论了浮游植物溶解有机碳释放研究的现状和存在的问题,并对PDOC初级生产力测定的推广和相关研究的深化提出建议。

关键词：浮游植物溶解有机碳初级生产力 PDOC 细胞外释放

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乐清湾大型底栖生物群落特征及其对水产养殖的响应

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生态学报 2007年第1期27卷 34-41页

作者：杨俊毅高爱根宁修仁张东声国家海洋局海洋生态系统与生物地球化学重点实验室杭州310012

乐清湾大型底栖生物的四季采样研究,发现124种大型底栖生物,其中多毛类41种、软体动物37种、甲壳类22种、棘皮动物10种和其他类14种。乐清湾大型底栖生物年均生物量41.95g·m-2,年均密度85个·m-2,生物量棘皮动物居首(约占60%);密度软... 详细信息

乐清湾大型底栖生物的四季采样研究,发现124种大型底栖生物,其中多毛类41种、软体动物37种、甲壳类22种、棘皮动物10种和其他类14种。乐清湾大型底栖生物年均生物量41.95g·m-2,年均密度85个·m-2,生物量棘皮动物居首(约占60%);密度软体动物最大(约占35%)。生物量和密度分布春季为最高。对乐清湾大型底栖生物分布现状与以往资料及邻近海湾进行了比较,并将大型底栖生物群落对乐清湾牡蛎养殖和网箱养殖的响应做了分析探讨。

关键词：大型底栖生物生态水产养殖乐清湾

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Standing crop and primary production of benthic microalgae on tidal flats in the Sanggou and Jiaozhou Bays, China

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Acta Oceanologica Sinica 2003年第1期22卷 75-88页

作者：宁修仁蔡昱明刘子琳胡锡钢刘诚刚 Second Institute of Oceanography State Oceanic AdministrationHangzhou 310012ChinaSOA Key Labs of Submarine Sciences and Ocean Dynamic Processes & Satellite OceanographyHangzhou 310012China Second Institute of Oceanography State Oceanic AdministrationHangzhou 310012China

The standing crop and primary production of benthic microalgae on tidal flats have seasonally been observed in the Sanggou and Jiaozhou Bays of the northern China coast during 1999 - 2000. The results show that the annual primary productions of benthic microalgae on tidal flats in the two bays are 2 532 and 7 542 tons carbon, which would be able to support 3.1 x 103 and 9.2 x 103 tons shellfish meat, respectively. The nature of sediment is essential for governing the biomass and primary production of benthic microalgae on tidal flats. The biomass and primary production of benthic microalgae on tidal flats with muddy sediments are higher than those with sandy sediments, which resulted from higher nutrient concentration and lower grazing pressure. That is the reason why in comparison with Xiangshan Bay the standing crop and production of benthic microalgae on tidal flats of the Sanggou and Jiaozhou Bays are low. Light was a key factor controlling vertical distribution of biomass and production of benthic microalgae on tidal flats of the two bays, resulted in appearance of maximum chlorophyll a and primary production at the surface layer and sharply decreased with depth of sediment.

关键词： Chlorophyll a and phaeopigments primary production benthic microalgae microphyto-benthos tidal flats the Sanggou Bay the Jiaozhou Bay

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Size fractionated biomass and productivity of phytoplankton and new production in the Prydz Bay and the adjacent Indian sector of the Southern Ocean during the austral summer 1998/1999

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Acta Oceanologica Sinica 2003年第4期22卷 651-670页

作者： Cai Yuming 1,3, ning xiuren 1,2,3, Zhu Genghai3, Shi Junxian3 1. Key Laborary of Submarine Geosciences of State Oceanic Administration,Hangzhou 310012,China. 2. Key Laborary of Ocean Dynamic Processes and Satellite Oceanography of State Oceanic Administration,Hangzhou 310012,China 3. Second Institute of Oceanography of State Oceanic Administration, Hangzhou 310012,China Key Lab Submarine Geosci State Ocean Adm Hangzhou 310012 Peoples R China Key Lab Ocean Dynam Proc Satellite Oceanog State Ocean Adm Hangzhou 310012 Peoples R China Inst Oceanog State Ocean Adm 2 Hangzhou 310012 Peoples R China

The paper deals with the studies on the cell abundance, the composition of dominant species, size fractionated biomass and productivity of phytoplankton, new production, the environmentally restricted mechanism in the Prydz Bay and the adjacent Indian sector of the Southern Ocean during the austral summer 1998/1999. The results showed that there was marked feature of spatial zonation in the sea areas investigated. In the Prydz Bay and its adjacent continental shelf, the biomass and productivity of phytoplankton were high; those of continental slope and open ocean area were obviously low. The nutrient concentration had opposite distribution trend, due to the consumption of phytoplankton. It mainly affected by the vertical stability of water column, grazing pressure of zooplankton, temperature and light etc. The results of size-fractionation showed that the average contribution of netplankton to total chlorophyll a in studied sea areas was 52.2 %, those of nano- and picoplankton were 29.4 % and 18.4 %, respectively. The average contribution of netplankton to total primary production was 52.4 %, those of nano- and picoplankton were 28.7 % and 18.9 %, separately. It is same as previous conclusion that the contribution of picoplankton to productivity is slightly larger than that to biomass of phytoplankton communities. The average new production and f-ratio were 230.6 mg/ (m(2.)d) and 0.43, respectively.

关键词： phytoplankton standing stock primary productivity size-fractionation new production the Southern Ocean

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