武汉东湖和态系中浮游物的营养结构     

林婉莲  刘鑫洲 《海洋与湖沼》1990,21(5):411-417

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METHODOLOGY FOR STUDIES OF CARBONDYNAMICS BETWEEN PHYTOPLANKTONPRIMARY PRODUCTION AND HETEROTROPHICBACTERIAL SECONDARY PRODUCTION     

林婉莲  Jurgen Overbeck 《中国海洋湖沼学报》1989,(1)

The SCENTO-System was used to study the carbon dynamics between phytoplankton primary production and heterptrophic bacterial secondary production. Most of the methods used nowadays in situ for limnological synecology studies were applied. Primary production measurement showed an increasing tendency with increasing content of chlorophylla .It provided a true photosynthetic rate lying within the range of eutrophic lakes. Net EOC released from the algae ranged from 8.5 to 27.5μg C l-1 (6h)-1. Accompanying the algal products the number of bacteria increased from 1.475×109 to 8.074×109 cells l-1. The bacterial mean cell volume was small, between 0.0315 and 0.0548um3. Bacterial carbon production from direct growth estimates was compared with independent calculations of bacterial growth from EOC uptake and 3H-thymidine incorporation. Direct estimates were 2.97-10.0μg Cl-1 (24 h)-1 with the exception of a zero-growth on the third day. EOC uptake was 123.5-191.0μg Cl-1 (6h)-1.That calculated from 3H-thymidi  相似文献   

武汉东湖水柱沉降物有机碎屑碳测定初报   总被引：1，自引：1，他引：1       下载免费PDF全文

林婉莲  刘鑫洲 《海洋与湖沼》1985,16(6):488-549

经沉淀采样器在东湖悬挂24小时采得沉淀物,作总颗粒有机碳分析;用显微镜计量出浮游植物活体体积及浮游动物活体的个体数。把两者换算成有机碳量,然后从总颗粒有机碳量与浮游生物活体碳量之差,求得颗粒有机碎屑碳量。1982年,测得东湖沉降物颗粒有机碎屑碳的沉降速率分别为18.65g·m~(-2)·a~(-1)(站Ⅰ)及23.03g·m~(-2)·a~(-1)(站Ⅱ)。直线迴归表明,沉降物中颗粒有机碎屑碳量与颗粒物量的线性相关很显著。  相似文献   

武汉东湖生态系中浮游物的营养结构   总被引：4，自引：0，他引：4  

林婉莲  刘鑫洲 《海洋与湖沼》1990,21(5):411-417

本工作主要探讨东湖水柱浮游物的颗粒有机物在营养结构上量的关系。定量测定武汉东湖浮游物的干重、无灰重及浮游动、植物生物量并进行相应的碳、氮、磷分析。1983和1984两年东湖浮游物总颗粒有机碳现存量(mg/m~3)分别为3993与2819(Ⅰ站),2958与1856(Ⅱ站);总颗粒有机氮为762与584(I站),565与369(Ⅱ站);总颗粒有机磷为105与56(Ⅰ站),59与37(Ⅱ站)。颗粒有机碎屑碳一般占浮游物总颗粒有机碳的50％,占浮游生物活体碳的61％—104％。与浮游植物生物量碳相比,有机碎屑碳是它的2—6倍。  相似文献   

武汉东湖颗粒有机碎屑碳、氮、磷的沉降速率   总被引：1，自引：0，他引：1  

林婉莲  刘鑫洲 《海洋与湖沼》1989,20(2):163-170

1983—1984年,测定了东湖水柱总沉降颗粒有机物中的碳、氮、磷、叶绿素a含量和浮游动物数量,以及该湖浮游动、植物优势种的干重/湿重、C/N及C/P比值。利用所得数值计算出其颗粒有机碎屑的沉降速率。东湖这两年的颗粒有机碎屑的沉降速率[g/m~2·a),Ⅰ站分别为10.67与10.97(碳),2.15与2.68(氮)及0.29与0.30(磷);Ⅱ站分别为10.35与7.26(碳),2.17与1.12(氮)及0.22与0.16(磷)。与水柱浮游植物净生产量相比,这两年有机碎屑碳的沉降量,Ⅰ站仅占1.96％与2.39％,Ⅱ站占1.36％与0.93％。  相似文献   

CHANGE IN THE ACTIVITY OF THE RESPIRATORY ELECTRON TRANSPORT SYSTEM IN NATURAL PHYTOPLANKTON ASSEMBLAGES AND CULTURED ALGAE     

王建  林婉莲 《中国海洋湖沼学报》1993,11(4):375-380

Activities of the respiratory electron transport system (ETS), C uptake, chlorophyll and temperature were determined at a station in the center of Donghu Lake. Seasonal, fluctuations in ETS-activities ranged from 100 to 460μg O2 h-1.L-1. Production: respiration ratio (P/R) calculated from C uptake and ETS-activity, ranged from 0.2 to 6.8. The test on cultured algae ETS-activity revealed marked differences in different growth phases. ETS activity is suggested as an indicator of lake nutrient status.  相似文献   

武汉东湖超微藻生态学的初步研究   总被引：7，自引：2，他引：5  

王建  林婉莲 《湖泊科学》1998,10(4):71-76

论述了武汉东湖超微藻年数量,叶绿素含量,生产量分布,于室内模拟了不同光强与不同浓度Ｐ营养对超微藻光合性能的影响,同时与国外海洋与淡水超微藻的生产力,生物量和各自所占百分比进行了比较。文中还就东湖超微藻分布与生态环境之间关系进行了讨论。  相似文献