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1.
虾池小型底栖动物的数量研究   总被引:2,自引:0,他引:2  
提出1987年5月至10月在黄岛养虾池对虾生长周期内对小型底栖动物数量逐月调查。指出:小型底栖动物总平均密度为1092.4inds·10cm-2,自由生活海洋线虫和底栖桡足类是主要类群,其总平均密度分别为466.9和457.9inds·10cm-2。89.7%的小型底栖动物分布在沉积物表层2cm内。结果指明小型底栖动物被对虾捕食,并提出了捕食模式。  相似文献   

2.
尹毅  许广森 《海岸工程》1996,15(2):25-28
根据北戴河东、西污水处理工程建设的需要,对北戴河沿海及拟建污水处理工程排污口附近沉积物中Cu、Zn、Pb、Cd、Hg的现状值进行了调查研究,并就减轻沉积物污染的措施及污水排海的方式提出了建议。  相似文献   

3.
尹毅  仲维妮 《海岸工程》1996,15(1):7-11
从洋浦开发区污水处理工程建设的需要出发,对排污海区海水及沉积物的环境质量现状进行了调查研究,为污水处理工程的设计及洋浦开发区沿海海洋环境的保护提供了基础性研究资料。  相似文献   

4.
南极长城站、中山站考察支撑平台改造   总被引:1,自引:0,他引:1       下载免费PDF全文
我国在南极建有长城和中山两站。长城站建成于1985年2月20日,经1986年、1992年和1996年的几次较大扩建后,目前站区总建筑面积约3400m^2余。中山站建成于1989年2月26日,站区总建筑面积约2700m^2余。两站建筑设施主要包括:生活栋、科研栋、通信栋、气象栋、发电栋、车库、综合库、食品冷冻、冷藏库等。为了保障考察站的正常运行,两站除配备了供电、供水、取暖、通信等系统外,还建有油料储备供应系统、垃圾处理和污水处理设施、水陆交通运输工具和工程机械等。长城站已运转了20年,中山站也已运转了15年,为了能满足我国南极考察事业发展的需要,计划在“十五”期间对南极两站进行逐步实施改建和增建部分建筑和考察设施。  相似文献   

5.
东寨港红树林小型底栖动物的密度和生物量研究   总被引:3,自引:1,他引:2  
刘均玲  黄勃  梁志伟 《海洋学报》2013,35(2):187-192
2012年2月对海南省东寨港红树林滩涂沉积物小型底栖动物进行研究,结果表明,红树林中有六大类小型底栖动物,包括自由生活线虫、桡足类、涡虫、多毛类、寡毛类、海螨.在种类组成上,自由生活线虫为优势类群,在4个采样站位中,分别占小型底栖动物总数量的95.30%,97.02%,96.45%,90.53%.东寨港红树林小型底栖动物的总栖息密度为(1 082.23±563.76)个/(10 cm2),总生物量为(764.06±511.63)μg/(10 cm2).4个采样站位平均多样性指数H'分别为0.26、0.17、0.20、0.45,平均均匀度指数 J 分别为0.13、0.09、0.10、0.23.最小显著极差法(LSR)进行多重比较分析表明,4个采样点小型底栖动物差异明显.海洋线虫与桡足类的数量之比(N/C)显示东寨港红树林受到了有机质污染.  相似文献   

6.
朱根海 《海洋学报》1991,13(2):282-289
长城站位于62°12′59″S、58°57′52″W,沿岸砾砂滩潮间带小型底栖植物丰盛,它是贝类、鱼类和潮间带其他底栖动物的重要饵料。国外,Van Heurck和William等对南极底栖生活的硅藻类已作过调查研究;国内,仅少数学者记录了沉积物中的硅藻类和潮间带的小型藻类,而对长城站潮间带小型底栖植物的调查研究尚未见报道。本文为我国对中国南极长城站沿岸砾砂滩潮间带小型底栖植物的种类组成、数量分布、种类多样性指数值(d)和不同测站的相似性指数值(S)的首次考察报告。  相似文献   

7.
烟台市污水处理深海排放工程设计方案研究与选择   总被引:2,自引:0,他引:2  
沿海城市污水处理深海排放工程在我国起步较晚,烟台市污水处理深海排放工程我国目前规模最大的同类工程,且已进入施工阶段,本文详细阐述了该工程及水工设计方案,在我国城市污水2深海排放工程领域作了积极有益的探索。  相似文献   

8.
赤点石斑鱼繁殖生物学和种苗培育研究概况   总被引:8,自引:0,他引:8  
赤点石斑鱼(Epinephelusakaara)肉质鲜美,营养丰富,是名贵的海产经济鱼类之一。80年代以来,广东、广西、海南、福建和浙江等省沿海大力发展石斑鱼网箱养殖。赤点石斑鱼属鲈形目的科,为暖水性底层鱼类,喜栖息于岩礁或底质为砂砾的海域,以小型甲壳类和小型鱼类为食,活动范围小,常年生活于岛礁附近,不作长距离洄游,仅在生殖季节作短距离产卵洄游。分布于日本、朝鲜、印度和我国南海及东海。1性转变、群体年龄结构和生长。赤点石斑鱼属于雌雄同体雌性先熟鱼类,在其生活史中存在着性转变现象[1,15]。戴庆…  相似文献   

9.
基于2016年希腊第16届国际小型底栖生物会议资料及我国已有的信息,本文论述了国内外小型底栖生物的研究概况,着重介绍了我国该领域的主要进展,包括小型底栖生物的方法学、丰度与生物量的分布、海洋线虫和底栖桡足类的分类学、入侵植物种对线虫群落的影响、粒径谱和次级生产力、摄食生态学、实验室培养和生活史、环境检测、海洋线虫的分子生物学与系统演化、生态动力学-水层底栖耦合模型以及人才培养。依据国内外研究现状提出了今后的发展目标和应着重加强的研究方向。  相似文献   

10.
2013年6月-2014年6月对青岛岩礁潮间带鼠尾藻、孔石莼、蜈蚣藻附植小型底栖生物进行了连续13个月的逐月采样,对小型底栖生物的丰度、生物量、生产量、类群组成及其季节动态进行了研究。共鉴定出小型底栖生物16个类群。鼠尾藻附植小型底栖生物的年平均丰度和生物量分别为7×103 ind·g-1 dwt algae·a-1和56×103μg·g-1 dwt algae·a-1。孔石莼附植小型底栖生物的年平均丰度和生物量分别为2×103 ind·g-1 dwt algae·a-1和8×103μg·g-1 dwt algae·a-1。蜈蚣藻附植小型底栖生物的年平均丰度和生物量分别为3×103 ind·g-1 dwt algae·a-1和16×103μg·g-1 dwt algae·a-1。三种藻类附植小型底栖生物平均丰度和生物量的高低依次为:鼠尾藻蜈蚣藻孔石莼。附植小型底栖生物及其主要类群的丰度具有明显的季节变化,其中鼠尾藻、孔石莼附植小型底栖生物丰度与海水温度和盐度显著相关。附植小型底栖生物的丰度还可能与藻类生长周期关系密切,三种藻类附植小型底栖生物的丰度的最高值均出现在藻类的快速生长期之前。三种藻类附植小型底栖生物群落差异显著,鼠尾藻上线虫为最优势类群,孔石莼和蜈蚣藻上底栖桡足类为最优势类群。藻类形态和藻类生活周期是影响附植小型底栖生物类群组成、丰度和生物量的关键因素。  相似文献   

11.
A value chain analysis is conducted to identify upgrading, that is, improvements in quality and product design that enable producers to gain enhanced value or through diversification in the product lines served. However, a range of data and information of use to managing small-scale fisheries can be also be produced. Eight value chain studies, carried out for specific fish species in different locations around the Philippines, are examined. Policy and management lessons learned and interventions resulting from the value chain analysis for small-scale fisheries management are discussed. Recommendations for using value chain analysis in small-scale fisheries management include stricter regulation on size limits of harvest, monitoring schemes, certification processes, post-harvest facilities, seasonal closures, social enterprises, credit facilities, and habitat protection.  相似文献   

12.
焦卫东 《台湾海峡》2005,24(3):304-309
土壤渗滤处理系统设备简单、投资少、操作管理方便、能耗低,净化效果良好,在处理海岛生活污水领域具有广阔的发展前景.根据鼓浪屿目前污水水质、水量的特点,采用土壤渗滤高度水处理技术对污水进行处理,污染物经过土壤的物理、化学和生物作用,出水达到《城市污水再生利用城市杂用水水质》(GB/T18920-2002),具有不产生污泥,运行简单,氮磷去除效率高,无二次污染等特点.  相似文献   

13.
Mangrove forests are known to accomplish crucial ecosystem functions and services. They are nursery areas for fish, prawns and crabs, which provide coastal communities with a variety of food, timber and chemicals, and protect coasts from catastrophic events, such as tsunamis. Recently, a novel ecological service has been proposed for mangrove systems, namely natural wastewater treatment wetlands. This hypothesis was based on experimental data collected mainly in Chinese mangrove systems, which proved that mangrove soils were efficient in absorbing nutrients. Moreover, sewage loading seemed harmless to both plants and benthic communities in these systems. However, before promoting the use of natural mangroves as pollution buffers, or constructed mangrove wetlands as sewage treatment facilities, more data are needed on their overall tolerance to organic loading. Differences in macrobenthos patterns were thus investigated between peri-urban mangroves and sites not affected by sewage disposal in East Africa. We assessed differences in epifaunal assemblages, comprising crabs and molluscs, employing multivariate ACI unbalanced analyses to compare peri-urban mangrove swamps with those characteristic of non-urban mangroves with similar ecological traits. The sampling design was spatially nested, replicates being assessed at equatorial (southern Kenya) and subtropical (southern Mozambique) sites. The results manifested a consistent increase in crab biomass at the peri-urban sites in both Kenya and Mozambique. Moreover, the peri-urban systems were richer than the non-urban mangroves, both in terms of fiddler crabs (Uca spp.) which feed on benthic microalgae and bacteria, and sesarmids, such as Perisesarma guttatum and Neosarmatium meinerti, which feed on both substratum and leaf litter. The abundance of gastropods, in contrast, decreased significantly, especially in Kenya, mainly due to the disappearance of the mud whelk Terebralia palustris. The results thus indicate that, in East African mangrove systems, domestic wastewater has detectable effects on crabs and molluscs, suggesting their usefulness as bioindicators of its effects in mangroves. Transformed benthic patterns at the peri-urban sites indicated the need for further study of the actual potential of natural mangrove forests to absorb pollution in sewage treatment.  相似文献   

14.
本研究在广东省现有入海排污口清单的基础上,将入海排污口划分为4类,研究分析了入海排污口的数量、类型和分布情况.研究表明,广东省共有入海排污口1436个,东西两翼数量多于珠三角,区域和地市差异明显.结合广东省近岸海域环境质量状况和排污口分布特征,针对性提出了推进入海排污口规范化设置与备案、分类推进各类排污口污染治理,提升...  相似文献   

15.
A lipid biomarker survey was conducted in Victoria Harbour, Canada, to compare the distribution of sewage-derived organic matter with existing results from bacterial studies. Previous surveys [Miller (1993) Report prepared by Capital Regional District Engineering Department, Victoria, B.C. Canada and Milleret al. (1995) Report prepared by CRD Environmental Services Group and Aquatic Science Consultants Ltd., B.C., Canada] of sewage contamination in the harbour were based principally on infrequent faecal coliform counts. The use of lipid biomarkers to determine time-averaged concentrations of sewage components in sediments may be a more appropriate method for defining areas where sewage is causing environmental or human health risks. 5β-Coprostanol was measured together with other sterols, fatty acids and fatty alcohols. Generally, sewage contamination shown by these lipid biomarkers was coincident with high faecal coliform counts from previous studies. However, this survey suggests, contrary to faecal coliform counts, that Portage Inlet was a region where sewage had accumulated in the sediments, possibly due to nearby overflow facilities or tidal pumping. Although the bacterial counts were low, sewage-derived organic matter was accumulating in the slack areas. In sediments of the Gorge and West Bay there were low faecal biomarker concentrations; this was probably due to the strong tidal currents which do not allow faecal matter to settle in sediments. Faecal coliform counts, however, indicated poor water quality in these same regions but this probably reflects fresh discharges passing through this area without leading to settlement.  相似文献   

16.
本文通过实测资料,分析了黄河清水沟流路入海泥沙淤积在三角洲陆上和滨海以及漂向外海的泥沙分配,统计了三角洲淤积造陆沿岸线的淤积延伸宽度以及泥沙在滨海水下的淤积范围,并对潮流和余流引起的泥沙扩散进行了分析。  相似文献   

17.
竹醋对生活污水好氧处理的强化作用初步研究   总被引:1,自引:0,他引:1  
采用在生活污水好氧处理之前投加外源物质的方法 ,研究了竹醋 (Bamboo Vinegar,BV)及其主要有机成分 (乙酸 )对污水好氧处理效果的强化作用。结果表明 :1当 VBV/ V污水 的比值达到1 / 1 0 6时 ,BV对污水 CODcr的去除有极显著的强化作用 :CODcr去除率比不加竹醋的对照组提高1 0 %。但是 ,BV对污水中 NH+ 4 - N,T- P的去除率没有影响。 2乙酸单独使用亦可显著提高污水CODcr去除率 ,当 V乙酸 / V污水 为 1 / 1 0 7时 ,强化效果最好 ,CODcr去除率提高 1 3%。由于乙酸具有与BV相似的作用特点 ,所以认为 BV对污水处理效果的强化作用来自其中的乙酸。为了将 BV应用于污水处理中 ,需要进一步研究确定 BV对活性污泥法、生物膜法处理污水的强化效果  相似文献   

18.
生物强化技术对于改善现有污水处理工艺的效果具有重要作用 。实验研究以生活污水中添加有效微生物群(EM)和单以生活污水两种方式培养活性污泥,然 后分别将其引入SBR反应器,以考察EM对SBR工艺处理生活污水的强化作用。结果表明,在正 常生活污水浓度和最优工艺条件(污水pH6~8,曝气2h,静置沉淀0.5h)下,EM-SBR反应器对 污水CODcr、NH+4-N的平均去除率分别比普通SBR工艺高19.08%和23.17%;且具有较好 的稳定性。此外,EM强化的SBR工艺还具有极强的抗冲击负荷能力,当进水CODcr为2738mg.L-1时,处理3h后,出水CODcr即可达到《污水综合排放标准》的要求,去除率高于96 %,而普通SBR工艺即使处理6h也不能达标。  相似文献   

19.
The intertidal zone around Mar del Plata’s sewage discharge (38° S, 57° W) is characterized by the presence of the non-indigenous spionid polychaete Boccardia proboscidea. This species has been classified as tolerant to moderate and high levels of organic contamination. During early stages of colonization this species can reach very high densities without suffering from interspecific competition, building biogenic structures such as reef. The aim of this work was evaluate the recovery time of the reef to a small-scale experimental physical disturbance. Five independent rocks with B. proboscidea reefs on them were selected randomly and a small-scale disturbance was generated by corers (16 cm2). At the beginning of the experiment, six corers were collected in each reef to produce the disturbance. The original density of B. proboscidea in each reef was determined in these corers. The reefs with disturbed corer were sampled on successive days to assess the reef recovery time. The number of larvae, juveniles and adults was quantified. Polychaete reefs had very high densities before the disturbance (mean density: 1,021,250 ind m−2). Boccardia proboscidea reefs had a fast recovery rate after small-scale disturbance. Four days after disturbance the density reached about 50% of the original density and after 5 days the disturbed reefs could not be differentiated from the undisturbed reef. The initial recolonization of disturbed patches occurs as a result of migration which appears to be driven by larvae and juveniles. These reefs can not be seen as biodiversity hotspots and the presence of the species demonstrates great environmental deterioration.  相似文献   

20.
次氯酸钠作为消毒剂已在很多行业得到了广泛应用,作为油田污水处理用杀菌剂进行工业性试验还属首次。介绍了电解盐水现场产生次氯酸钠直接用于油田污水杀菌处理的技术原理、特点以及在大港油田庄大污水处理站的应用效果。并对次氯酸钠杀菌的加入浓度,以及对注水设备的腐蚀性进行了研究试验,结果表明次氯酸钠杀菌有很好的连续性,虽然杀菌后的污水腐蚀速率略有增加,但使用是安全的。  相似文献   

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