九龙江口红树林区底栖动物体内的多环芳烃

2001年8月和11月在九龙江口红树林区采集了6种底栖动物,测定了它们体内16种多环芳烃的含量.紫游螺(Neritina [Dostia] violacea)、黑口滨螺(Littoraria melanostoma)、可口革囊星虫(Phascolosoma esculenta)、弹涂鱼(Periophthalmus cantonensis)、查加拟蟹守螺(Cerithideadj adjariensis)、孔虾虎鱼(Trypauchen vagina)对沉积物中多环芳烃的富集系数均小于1.弹涂鱼和黑口滨螺体内多环芳烃的含量有随沉积物中多环芳烃含量的增加而增加的趋势,但它们的富集系数却有随沉积物中多环芳烃含量增加而减少的趋势.弹涂鱼、黑口滨螺、查加拟蟹守螺和可口革囊星虫体内多环芳烃主要由二环多环芳烃组成,紫游螺和孔虾虎鱼体内分别是四环和五环多环芳烃比例最高.     

九龙江口红树林区底栖动物的生态

根据1987年2、5、8、11月的调查资料,研究了福建九龙江口红树林区底栖动物生态。结果表明,该区共有底栖动物172种,主要由多毛类、软体动物和甲壳动物组成,以近岸广盐性种类占优势。平均生物量和栖息密度分别为48.03g/m~2和311个/m~2,以甲壳动物占优势;数量的季节变化显著;中潮区数量较大。潮汐、盐度和沉积物是影响本区底栖动物分布的主要因素。     

九龙江口红树林上附着动物的生态

福建九龙江口红树林附着动物７种，白脊藤壶Ｂａｌａｎｕｓ ａｌｂｉｃｏｓｔａｔｕｓ和白条地藤壶Ｅｕｒａｐｈｉａ ｗｉｔｈｅｒｓｉ在数量上占绝对优势，是危害红树的主要附着动物。附着动物在河口红树林区的数量分布随着盐度的降低而减少，其栖息密度和生物量的高峰期在夏，秋两季。生长茂密的红树林（郁蔽度大于０．５），附着动物主要分布于水流畅通的向海边缘和潮沟边缘的红树上。水流畅通程度是影响附着动物在红树林区向纵     

九龙江口红树林土壤微生物的类群及抗菌活性

研究了九龙江口的秋茄(Kandelia candel)林和白骨壤(Avicennia marina)林两个红树林群落及其相应对照光滩土壤微生物的类群及抗菌活性.对微生物类群的研究结果表明:九龙江口红树林区土壤细菌中,芽孢杆菌(Bacillus)是最占优势的属;放线菌以小单胞菌属(Micromonospora)最具优势;其次是链霉菌属(Streptomyces),从秋茄林到白骨壤林,由于潮位降低,小单胞菌比例增加,而链霉菌比例下降;丝状真菌以半知菌占绝对优势,木霉(Trichoderma)、曲霉(Aspergillus)和青霉(Penicillum)是最常见的属;随着土壤深度的增加,微生物的类群减少,但芽孢杆菌和小单胞菌的相对比例增加;红树林土壤微生物类群比对照光滩丰富,缘于林内土壤营养与微生物的栖息条件比光滩优越.对抗菌活性研究表明:土壤真菌的抗菌活性低,抗菌谱窄;放线菌的抗菌活性高,抗菌谱宽,具有抗菌活性的放线菌多为小单胞菌,小单胞菌是一类值得重视的放线菌.     

九龙江口红树植物叶片重金属元素含量及动态

本文探讨了福建九龙江口潮间带秋茄、木榄、红海榄、白骨壤和桐花树等红树植物叶片重金属元素Ｃｕ、Ｐｂ、Ｚｎ、Ｃｄ、Ｍｎ的含量及动态。结果表明，该河口红树林区表层土壤沉积物元素含量顺序为Ｍｎ〉Ｚｎ〉Ｐｂ〉Ｃｕ〉Ｃｄ；５种红树植物叶片元素含量顺序为Ｍｎ〉Ｚｎ〉Ｃｕ〉Ｐｂ〉Ｃｄ；不同物种叶片元素含量大都有明显差异；叶片对土壤元素富集系数，以Ｍｎ、Ｃｄ较高，Ｐｂ最低；随叶片从幼叶－成熟叶－黄叶的生长发育，Ｍｎ     

九龙江口枝角类的分布

本文根据1983年2月至1984年1月在九龙江口采集的浮游动物样品,并参考1979年2月以来所采的样品,分析报道了该海区枝角类的种类组成和数量分布.共鉴定枝角类31种,以淡水类群占优势,种数季节分布为双周期型,总量分布为单周期型,种数和总量在河口上部数量高,在口部数量低。文中还讨论了其分布与环境因素的关系。     

九龙江口硒的化学行为

代表旱雨季的４航次九龙江口硒的调研中，发现总溶解无机硒和Ｓｅ（Ⅳ）皆呈保守行为；溶解有机硒和颗粒氧化物硒则无甚规律可循。沉积物中机硒与有机磷含量良好正相关关系。由沉积相向上覆水体提供的溶解无硒和有机硒的通量，分别为１７０和２００ｎｍｏｌ／（ｍ＾２．月）。     

九龙江口鱼类多样性和营养级分析

2009年5月和11月对九龙江口进行了两个航次的拖网渔业资源调查,探讨了该河口鱼类群落结构和物种多样性特征。结果表明,两次拖网调查共鉴定鱼类35种,隶属于2纲12目22科。其中中上层鱼类3种,近底层鱼类7种,底层鱼类25种;暖水种22种,暖温种13种;河口性鱼类10种,海洋性鱼类25种;低级肉食性鱼类7种,中级肉食性鱼类28种。中华海鲇Arius sinensis、凤鲚Coilia mystus和红狼牙鰕虎鱼Odontamblyopus rubicundus是5月的优势种,中华海鲇Arius sinensis、凤鲚Coilia mystus和叫姑鱼Johnius belengerii是11月的优势种。5月和11月鱼类重量密度分别是471.53kg.km 2和143.97kg.km 2,5月和11月尾数密度分别为40811ind.km 2和3804ind.km 2。九龙江口鱼类多样性指数为1.20,均匀度指数为0.39,丰富度指数为3.11,营养级指数为3.55。与1985年同期的调查资料相比,九龙江口鱼类群落结构和物种多样性发生了很大的变化,平均营养级明显降低。九龙江口鱼类多样性下降的主要原因可能是过度捕捞、环境污染和栖息地丧失等。     

九龙江河口区磷的转移和入海通量

1992～1993年4个航次的调查研究结果表明，九龙江河口区总磷的分布和转移受悬浮物含量明显控制。当SPM含量低时，其迁移过程接近理想行为；SPM含量高时则为非理想行为。估算得出，九龙江水体总磷的平均人海通量为1．47×103t／a。其中，溶解态磷为0．43×103t／a，约占29％；颗粒态磷占71％，九龙江水磷的输入以颗粒态为主。溶解态磷的分布，基本上在某一水平上了波动，其入海通量受环境影响很小，可能意味着颗粒磷的缓冲作用。     

Qeochemical behaviour of iodine in Jiulong River Estuary

Dissolved iodine species and the relationship between its distribution and salinity in Jiulong River estuarine water have been determined. It has been found that the total iodine, iodate and iodide are positive linear with salinity. This indicates that dissolved iodine species (IO-3 and I- ) in estuarine water .how conservative behaviour. The river water contains 2. 40μg/1 as iodide and less than 1. 0μg/1 as iodate, and iodide is the predominant species. Whereas the sea water contains 39. 4μg/1 as iodate and 4. 00μg/1 as iodide, and iodate is the dominant form. The distribution of dissolved iodine in pore water, as a function of depth, has been studied. Iodine in pore water occurs as iodide. The apparent fluxes of soluble iodine from the sediment to the overlying water in the estuary have been determined. The values are 2. 4 (15℃) and 27μmol/(m2·d) (30℃) respectively.     

九龙江河口区有机物的转移和入海通量

１９９２－１９９３年４年个航次调查结果表明，九龙江河口区水体中总有机物的含量和转移与悬浮物含量密切相关。当ＳＰＭ含量低时，其转移过程接近于理想行为；当ＳＭＰ含量高时，同为非理想行为。     

九龙江河口沉积物重金属污染评价

选择九龙江河口水域的沉积物为对象,以地质累计指数法、生态危害指数法对该水域沉积物重金属的污染程度及潜在生态危害进行评价,并利用主成分分析法分析其可能的来源。地质累积指数结果表明,九龙江河口水域沉积物中Zn、Cr均属无污染,大部分站位的Cu、Pb、Hg、As为无污染或轻度污染,大部分站位的Cd则为轻度或中度污染：生态危害...     

Size-fractionated uranium isotopes in surface waters in the Jiulong Estuary in China

Surface water was collected from the Jiulong Estuary for determination of activity concentrations of uranium isotopes in different size fractions, namely, greater than 53, 10 -53, 2 - 10, 0.4 -2 μm, 10 000 u -0.4 μm and less than 10 000 u fractions by microfihration and cross-flow uhrafiltration technologies. Results indicated that most of the dissolved uranium （ 〈 0.4 μm） exis- ted in the low molecular mass fraction （ 〈 10 000 u）, and the colloidal uranium-238 （10 000 u -0.4 μm） only contributed less than 1% of the dissolved uranium-238. The fractions of colloidal uranium in the dissolved phases decreased with the increasing sa- linity. A positive linear relationship between uranium-238 activities and salinities was observed for the dissolved, colloidal and low molecular mass fractions, indicating a conservative behavior of uranium in the Jiulong Estuary. In the particulate phases （ 〉 0.4 μm）, the partitioning of uranium isotopes among different size fractions was controlled by the partitioning of particle concentrations. In the regions with salinities below 20, the partitioning of uranium-238 among different size fractions was as follows： 10 - 53 μm 〉 2 - 10 μm 〉 0.4 - 2 μm greater than above 53 μm. However, the order at the offshore station with salinities above 30 changed as follows ： 0.4 - 2 μm 〉 10 - 53 μm 〉 2 - 10 μm greater than above 53 μm. The fraction of the 0.4 - 2 μm particles increased at the offshore station, suggesting the increased contribution of the authigenic uranium. The activity ratio of uranium-234 to uranium-238 in the dissolved phases, including the low molecular mass fraction and the colloidal fraction, was larger than unity, showing the occurrence of excess uranium-234. In contrast, the activity ratio of uranium-234 to uranium-238 in all size fractions of the particulate phase was close to the equilibrium value （1.0）. The observed different values of the activity ratio of uranium-234 to uranium-238 in the dissolved phase and the partic     

Characteristics of Heavy Minerals Composition and Distribution in Jiulong River Estuary Sediment

The bottom sediment samples were gathered during island investigation in 1994 and in the period of carrying out the natural science fund project of Fujian in 1999.The composition,distribution and assemblage characteristics of heavy minerals which granularity distributes from 0.063 to 0.125mm in the sediment from Jiulong River estuary are studied in the paper.The results show that there are 49kinds of heavy minerals and the average content of them is 9.38%.The dominant and characteristic minerals are magnetite.hematite,epidote,ilmentite,limonite,homblende,zircon,andalusite,biotite and so on,4mineral assemblage zones(Ⅰ.The watercourse gateway of Jiulong River mineral zone,Ⅱ.The northern estuary of Jiulong River mineral zone,Ⅲ.The southern estuary mineral zone,Ⅳ.The eastern estuary of Jiulong River mineral zone),can be divided based on the heavy mineral contents and the sdistribution characteristics,which not only relates to the matter sources but also is controlled by hydrodynamic condition and the sedimentary environment in the Jiulong River estuary.     

九龙江河口区表层水铀同位素的粒级分布

利用微滤和超滤技术研究了九龙江河口区表层水中铀及其同位素组成的粒级分布和地球化学行为.结果表明,溶解态(<0.4μm)中低分子量组分(<10 000 u)占主要份额,胶体态(10 000 u~0.4μm)238U所占比例不足1%,且随盐度的增加其所占份额逐渐降低.溶解态、低分子量组分和胶体态238U的比活度与盐度之间存在良好的线性正相关关系,证实它们在九龙江河口区呈现保守行为.在颗粒态(>0.4μm)中,各粒级组分238U所占份额主要受控于相应颗粒物的浓度,在盐度小于20的区域,各粒级颗粒组分238U占颗粒态的份额有如下变化次序:10~53μm>2~10μm>0.4~2μm>大于53μm,而在盐度大于30的近外海站位,该次序发生一些变化:0.4~2μm>10~53μm>2~10μm>大于53μm,最小粒级颗粒组分238U的贡献有所增加,反映了自生铀贡献的加强.九龙江河口区表层水中溶解态(包括低分子量组分和胶体态)的234U/238U)_A.R.均大于1,显示出234U过剩的特征,而各粒级颗粒组分中的234U/238U)_A.R.则接近于平衡值(1.0).这一现象与陆地岩石风化过程中水体对铀的淋滤释出量及234U的优先浸出有关.对232Th/238U质量比的研究显示,溶解态及其所包括的低分子量组分和胶体态的232Th/238U质量比均小于1,而颗粒态及其所包括的4个粒级组分中的232Th/238U质量比均大于1,反映了向外海输送过程中铀、钍地球化学行为的差异.     

邻近城市土壤重金属对九龙江口沉积土壤的影响

在研究建立于漳州地区生态地球化学调查基础上,对河口湾沉积物的重金属与人口高度集中的城市地区土壤重金属的分布特征进行了对比,分析了人为活动对河口的影响,结果表明,城区与河口湾表层样品都舍有相对区域基准值较高的Hg、Cd,而且Hg富集系数要远高于Cd的富集系数。分析两种元素来源与迁移方式可知,Hg由于可通过气态形式迁移而对河口影响更大。城区与河口湾样品的重金属进行聚类分析与主因子分析结果表明：城区土壤的As、Zn、Mo、Ni、Cr和Mn主要来自基岩来源。Pb、Se、Cd可以作为人为污染的指示元素,Hg、Sn显示与其他元素具有相对独立的行为。河口湾的元素组合与城区重金属基本相似,但Pb、Cu、Se、Mo、Cd显示出两种因素都有较大影响,可以指示人为影响与基岩源的双重作用。     

九龙江口ATP分布与环境因子的关系

本文根据１９９４年７月至１９９５年４月间４个航次调查资料而得。结果表明，九龙江口ＡＴＰ的含量平均值为２７８．４μｇ／ｍ＾３，变化范围在３２．４￣８５７．６μｇ／ｍ＾３之间。ＡＴＰ与叶绿素ａ和ＰＯＣ之间存在着正相关性。Ｃｈｌ－ａ／ＡＴＰ的高值区出现在盐度为２５￣３０间。ＰＯＣ（Ｂ）／ＰＯＣ的高温区出现在盐度为１５￣２５间。该区域颗粒碳含有最大比例的活体的有机碳约占６０％。     

九龙江口和厦门西港海域若干重金属元素的生物地球化学特性

根据１９８７年３月至１９８８年１２月九龙江口，厦门西港海域的调查资料，初步探讨该海域Ｆｅ，Ｍｎ，Ｃｕ，Ｚｎ，Ｎｉ，Ｃｏ，Ｐｂ，Ｃｄ等重金属元素的生物地球化学特性，及其与磷的生物地球化学的关系。结果表明该海域重金属元素的分布主要受九龙江径流的影响。在河水与海水混合过程中，悬浮颗粒态重金属元素发生明显转移，Ｆｅ，Ｍｎ，Ｃｏ，Ｚｎ等元素自悬浮颗粒物上解吸，Ｃｕ可能被吸附，颗粒态重金属元素与颗粒态磷呈良好     

中国九龙江河口营养盐基准值研究

One of the key concerns in estuarine and coastal environments is eutrophication, which is known to be closely connected to nutrient enrichment. To control and improve surface water quality, nutrient criteria are recommended in order to provide reference conditions for the environment. However, the current datasets of nutrient criteria in China are either designed for surface water or sea water, and as such these are not suitable for assessing estuarine water quality, especially given the unique ecosystem and dynamic properties of estuaries. To address this issue in current estuarine water management, nutrient criteria have been developed for a local estuary in the southeast of China. Segmentation of the Jiulong River Estuary, China was firstly analysed through field investigations carried out during 2013–2014, which resulted in the delineation of three segments characterized by their distinct properties in relation to salinity, hydrology, ecosystems, etc. Historical records from 1997 to 2014 were then analysed using statistical modelling to develop candidate nutrient criteria for the estuary.This stage of the analysis was undertaken in combination with the study of nutrient status records from the 1980s,which were used to establish a baseline reference condition. The recommended criteria values of dissolved inorganic nitrogen(DIN) in Segments Ⅰ, Ⅱ and Ⅲ of the Jiulong River Estuary are 64, 21 and 14 μmol/L,respectively, and the corresponding values for soluble reactive phosphorus(SRP) are 0.89, 0.76 and 0.89 μmol/L,respectively. It should be emphasised that these values are site-dependent, and that different results may be achieved at other locations depending on the physical and biogeochemical characteristics of an estuary, or even a single site within a catchment. It is hoped that by demonstrating a possible methodological approach and methods of nutrient criteria derivation in the Jiulong River Estuary, the current study will offer researchers some fundamental basis from which to begin to develop more complete nutrient criteria indices for the study of nutrient conditions in other estuaries throughout China.