泉州潮间带贝类的生态分布   总被引：1，自引：1，他引：0  

谢进金  谢进辉  林娟娟  冯琳  齐兆明  陈琳钦 《海洋科学》2006,30(1):54-62

报道了泉州市潮间带贝类的种类、数量及其生态分布。经记录整理、鉴定共得标本125种,隶属于3纲、46科和84属。其中,多板纲3种,双壳纲63种,腹足纲59种。根据它们对温度的适应性质可分为4个类群:暖温带种占5.6%;亚热带种占40.8%;广温广布种占48.0%;热带种占5.6%。  相似文献   

青岛湾潮间带活体底栖有孔虫Ammonia aomoriensis (Asano,1951)壳体δ¹⁸O值的季节变化     

俞宙菲  类彦立  李铁刚 《海洋科学》2016,40(7):132-139

近岸浅水底栖有孔虫是陆架海区古环境重建的重要手段,但是至今对其活体的研究非常缺乏。2014年6月至2015年5月对青岛湾潮间带活体底栖有孔虫Ammonia aomoriensis进行了连续12个月的采样,用虎红染色以确认活体。对壳径范围在200~550μm的活体壳体,以每增加50μm壳径为一组,进行δ18O测试。结果显示,A.aomoriensis壳体δ18O的月平均值的季节变化趋势与温度和盐度一致,与温度反相关,与盐度正相关,即青岛湾A.aomoriensis壳体δ18O值受温度和海水δ18O的影响,其壳体δ18O值表现出了很好的季节性波动。但是A.aomoriensis壳体δ18O的变化滞后于所测温度和盐度约2个月,其记录的是虫体在生长周期内在真实钙化温度下分馏所得的δ18O值。  相似文献   

基于河口潮间带底栖微藻群落水平的环境质量状态评价   总被引：1，自引：1，他引：0  

杜国英  郑异教  许恒龙 《海洋学报(英文版)》2016,35(6):112-120

The feasibility of community-based bioassessment of environmental quality status was studied using microphytobenthos(MPB) in estuarine intertidal ecosystems.The sediment samples of MPB were collected monthly during a 1-year cycle(September 2006–August 2007) at four sampling stations in the Nakdong River Estuary,Korea.Environmental variables,such as salinity,radiation,grain size of sediment,Si(OH)_4(Si),nitrate(NO_3~–),nitrite(NO_2~–),ammonium(NH_4~+) and phosphates(PO_4~(3–)),were measured synchronously for comparison with biotic parameters.The statistical analyses were carried out for assessment the relationship between biotic and environmental parameters.The results showed that:(1) the MPB community structures were significant differences among four sampling stations;(2) spatial variation in the MPB communities were significantly correlated with environmental variables,especially the nutrient NH_4+ in combination with salinity and grain size;(3) three species(Navicula lacustris,Pleurosigma anglulatum and Fragilaria sp.1) were significantly correlated with nutrients and/or Si;and(4) the species richness and diversity were significantly correlated with the grain size.It is suggested that MPB communities may be used as a potentially robust bioindicator for assessing environmental quality status in estuarine intertidal ecosystems.  相似文献   

Dredging for edible cockles (Cerastoderma edule) on intertidal flats: short-term consequences of fisher patch-choice decisions for target and non-target benthic fauna     

Kraan  Casper; Piersma  Theunis; Dekinga  Anne; Koolhaas  Anita; van der Meer  Jaap 《ICES Journal of Marine Science》2007,64(9):1735-1742

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Sedimentary processes on an intertidal mudflat in the upper macrotidal Seine estuary, France     

J. Deloffre  R. Lafite  P. Lesueur  S. Lesourd  R. Verney  L. Guzennec 《Estuarine, Coastal and Shelf Science》2005,64(4):1073

In order to understand the hydrodynamic parameters that control the fluvial sediment dynamics on an intertidal mudflat located in a sheltered zone in the upper part (fluvial part) of the macrotidal Seine estuary (France), a two-year field study of high-frequency field measurements was carried out. The bed-level evolution of the mudflat surface was measured from the semi-diurnal period to annual time scales using a high-resolution altimeter. The data showed that the sedimentary patterns on the mudflat were mainly controlled by river flows and tides. During high river flows in winter, sedimentation dominated; suspended particulate matter concentrations were higher, submersion was constant and at semi-diurnal scale, sedimentation duration was more important than erosion due to an asymmetrical tide. By contrast during low river flows in summer, erosion dominated mainly as a result of immersion/emersion of tidal flats during semi-diurnal cycle. From this annual sedimentation–erosion cycle we identify a temporary storage of 10–30% of the fine-grained (<63 μm) river-borne particles on mudflats in the upper section of the fluvial Seine estuary during high river flows.River-related sediment fluxes were estimated from the measurement of fine-grained sedimentation zones in the fluvial part of the estuary. The erosion/sedimentation processes were perennial, and the amounts of contributing sediments were directly related to the solid river load. Our results indicate that mudflats in the fluvial part of the Seine estuary play an important role in the downstream transfer of fine-grained suspended particulate matter (SPM) towards the turbidity maximum and the Rouen docks particularly during low river flows, when roughly 30–50% of the SPM originates from the eroded intertidal flats.  相似文献   

杭州湾期间带生态学研究──Ⅱ．数量组成与分布     

王海明  蔡如星  邵晓阳  范明生 《海洋学研究》1996,(4)

杭州湾潮间带生物数量比其它河口湾偏低，这与该湾粉砂质底质及强烈的水冲刷作用所导致的不稳定生境密切相关。从湾底向湾口，生物数量逐步增多，湾性分布明显；就垂直分布而言，中潮区的生物数量为最大；生物数量的季节变化明显，栖息密度以夏季为最高（４０２个／ｍ２），而生物量以秋季为最大（１８９．０３ｇ／ｍ２），数量的低值出现在冬季。生物量的季节变动受软体动物决定，而栖息密度则受软体动物、甲壳动物和多毛类三大动物类群的影响。  相似文献   

山东蓬莱沿海岩相潮间带贝类的垂直分布   总被引：1，自引：0，他引：1  

王晓华  朱龙  罗世菊  隋凤美 《海洋湖沼通报》2003,(4):79-83

蓬莱 ( 37°2 5’N～ 37°4 9’56”N ,1 2 0°34’4 4”E～ 1 2 1°0 9’E)位于山东半岛的北端 ,黄渤海交界处。作者通过对蓬莱沿海潮间带生物的调查 ,初步分析了岩相潮间带贝类种类及其垂直分布特点 ,依潮间带的不同区域而呈带状分布 (高潮带为滨螺群落 ,中潮带为牡蛎群落 ,低潮带为贻贝 -锈凹螺群落 )并简单分析了主要经济贝类的分布状况 ,为潮间带贝类资源合理开发与保护提供了基础资料 ,供海洋生态学、环保、水产部门参考  相似文献   

Content versus concentration: Effects of units on measuring the biogeochemical properties of soft sediments   总被引：1，自引：0，他引：1  

T.J. Tolhurst  A.J. Underwood  R.G. Perkins  M.G. Chapman 《Estuarine, Coastal and Shelf Science》2005,63(4):665-673

A variety of scientific disciplines require measurements of the biological, physical and chemical (biogeochemical) properties of soft sediments. These properties vary temporally and spatially in a highly complex fashion, due to interaction and feedback between the processes that control them. This paper presents theoretical and real examples showing how interaction between the properties of sediments and the use of different units of expression (i.e. content and concentration) can change patterns in the data and thereby alter the interpretation of results. Common mistakes leading to incorrect measurements being taken and incorrect inference of data are presented and a new conceptual way of thinking about natural sediments is discussed. We conclude that the presentation and interpretation of data expressed as concentration is preferable to content for biogeochemical measurements in sediments, because content data is confounded by various factors (including core density/mass), leading to mistaken inference.  相似文献   

The effects of semi-lunar spring and neap tidal change on nitrification, denitrification and N₂O vertical distribution in the intertidal sediments of the Yangtze estuary, China   总被引：3，自引：0，他引：3  

L.J. Hou  M. Liu  S.Y. Xu  D.N. Ou  J. Yu  S.B. Cheng  X. Lin  Y. Yang 《Estuarine, Coastal and Shelf Science》2007,73(3-4):607-616

To explore the influences of semi-lunar spring and neap tidal changes on nitrogen cycling in intertidal sediments, a comparative study among waterlogged, desiccated and reflooded systems was carried out in August 2005 and February 2006 by analyzing nitrification, denitrification and N₂O depth profiles in the intertidal flats of the Yangtze estuary. Laboratory experiments showed that alternating emersion and inundation resulted in the significant changes in nitrification and denitrification rates in the intertidal sediment systems. Due to the desiccation-related effects, lowest nitrification and denitrification rates were observed in the desiccated sediment cores. Highest nitrification and denitrification rates were however detected in the waterlogged and reflooded systems, respectively. It is hypothesized that the highest nitrification rates in the waterlogged sediments were mainly attributed to higher nitrifier numbers and NH₄⁺ being more available, whereas the availability of NO₃⁻ might dominate denitrification in the reflooded sediments. In addition, the highest N₂O concentrations were detected in the reflooded sediment cores, and the lowest found in the dried sediment cores. It was also shown that N₂O in the intertidal sediments was mainly from nitrification under the desiccated condition. In contrast, N₂O in the intertidal sediments was produced mainly via denitrification under the waterlogged and reflooded conditions. It is therefore concluded that the semi-lunar tidal cycle has a significant influence on nitrification, denitrification and N₂O production in the intertidal sediment systems.  相似文献   

南麂列岛环境质量调查与潮间带生态研究   总被引：3，自引：2，他引：3  

陈国通  杨晓兰 《海洋学研究》1994,12(2):1-15

１９９２年５月～１９９３年３月对南麂列岛潮间带１７条断面和本岛陆域环境进行了全面的生态调查和环境质量评价。共获大型底栖动物２７８种，大型藻类１２１种，微小型藻类１５５种。研究结果表明，本区种类组成以软体动物最为丰富，生物数量以甲壳动物占绝对优势。区系特点与福建、广东沿岸较为相似。生物量以春季为高，栖息密度在秋季有一明显高峰。生物量的大小顺序为开敞岩礁大于隐蔽岩礁大于巨砾大于泥滩大于沙滩。种类组成、数量分布和群落结构与底质类型、波浪作用关系密切。文中还对生物的地域断裂分布现象作了探讨，对环境质量保护问题提出了建议。  相似文献