Soft bottom macrobenthic communities of North Biscay revisited: Long-term evolution under fisheries-climate forcing     

C. Hily  F. Le Loc'h  J. Grall  M. Glémarec 《Estuarine, Coastal and Shelf Science》2008

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Effects of water exchange and vegetation on the macroinvertebrate fauna composition of shallow land-uplift bays in the Baltic Sea     

Joakim P. Hansen  Sofia A. Wikström  Lena Kautsky 《Estuarine, Coastal and Shelf Science》2008

Shallow bays with soft sediment bottoms are common habitats along the Swedish and Finnish Baltic Sea coastline. These bays undergo a process of geomorphometric evolution with the natural isostatic land-uplift process, whereby open bays and sounds decrease in depth and are gradually isolated from the sea, forming bays with narrow openings. This study tested the relationship between the morphometric isolation of the bays from the sea and the macroinvertebrate fauna community of these bays. Additionally, we tested the specific role of the submerged vegetation as an indicator of the macroinvertebrate fauna community. We chose two environmental factors for the analyses, water exchange of the bays and the taxon richness of the macroflora in the bays. We found a hierarchical relationship between water exchange, flora taxon richness, and fauna biomass and taxon richness using structural equation modelling: decreased biomass and taxon richness of fauna were related to decreased flora taxon richness, which in turn was related to decreased water exchange. Using multivariate redundancy analysis, the two environmental factors included in the model were found to explain 47.7% of the variation in the fauna taxon composition and 57.5% of the variation in the functional feeding groups of the fauna. Along the morphometric isolation gradient of the bays, the fauna assemblages changed from a community dominated by gastropods, bivalves, and crustaceans, to a community mainly consisting of a few insect taxa. Moreover, the proportion of predators, gathering collectors, and shredders increased while that of filtering collectors and scrapers decreased. Our results indicate that the density and taxon richness of macroinvertebrate fauna are higher in less morphometrically isolated bays than in more isolated bays in the Baltic Sea. Furthermore, we suggest that the taxon richness of macroflora can serve as an indicator of the fauna community.  相似文献   

Meiofauna in closed coastal saline lagoons in the United Kingdom: Structure and biodiversity of the nematode assemblage     

N. Barnes  R.N. Bamber  C.B. Moncrieff  M. Sheader  T.J. Ferrero 《Estuarine, Coastal and Shelf Science》2008

Coastal saline lagoons are rare in North West Europe and tend to be closed, brackish water systems. In the United Kingdom they are small and isolated, each exhibiting extremely variable habitat conditions, both spatially and temporally. This paper represents the first species-level study of lagoonal nematode assemblages in the UK. Samples were taken from seven ponds in a saline lagoon system on the south coast of England in order to describe the nematode assemblage in relation to habitat type and to assess the possibility of lagoonal specialisation. At each site samples were also taken, or data were already available, for salinity, sediment granulometry, sediment organic carbon content, photosynthetic pigments and lagoon topography.  相似文献   

烟台海域中度嗜盐菌分离、鉴定和系统进化研究   总被引：1，自引：0，他引：1  

冯二梅  宿红艳  王磊 《海洋通报》2010,29(1)

为研究山东烟台海域中度嗜盐菌的分布情况及种群特征,从烟台近海盐场采集的土样和水样中利用高氏一号培养基分离得到22株中度嗜盐菌。通过菌落形态观察、生理生化特征分析比较,选取其中的9株进行16SrDNA序列分析和系统进化分析,结果表明这些中度嗜盐菌分别属于7个属:芽孢杆菌属(Bacillus)、枝芽孢杆菌属(Virgibacillus)、薄壁芽孢杆菌属(Gracilibacillus)、刘氏菌属(Liuella)、产微球茎菌属(Microbulbifer)、拟诺卡氏菌属(Nocardiopsis)和交替单胞菌属(Alteromonas),其中菌株YTM-8、YTM-12和YTM-13可能是潜在的新种。以上研究结果表明烟台海域中存在有较为丰富的嗜盐微生物多样性,并且潜藏着新类型的嗜盐菌资源。  相似文献   

Summertime community structure of intertidal macrobenthos in Changdao Archipelago,Shandong Province,China     

王晓晨  李新正  李宝泉  王洪法 《中国海洋湖沼学报》2009,27(3):425-434

The community structure of intertidal macrobenthos in Changdao Archipelago(north of Shandong Peninsula,between Bohai Bay and the northern Yellow Sea) was examined based on samples collected from 14 stations in five transects in June 2007.Three stations corresponding to high,medium and low tidal areas were set up for each transect.A total of 68 macrobenthic species were found in the research region,most of which belonged to Mollusca and Crustacea.The average abundance and biomass of the macrobenthos was 1 38...  相似文献   

气候变化对海洋生物多样性的影响   总被引：3，自引：0，他引：3  

陈宝红  周秋麟  杨圣云 《台湾海峡》2009,28(3):437-444

本文针对国内外有关气候变化对海洋生物多样性影响的研究情况,分别从温度、CO2浓度变化、海平面上升、降雨量、海洋水文结构和海流变化以及紫外线辐射增强等方面探讨气候变化对海洋生物多样性的影响,并从病原生物传播、浮游生物群落结构、海洋鱼类群落结构变化等方面分析气候变化对海洋生态系统的影响．针对全球气候变化对我国海洋生物多样性保护带来的挑战,提出了今后的研究重点．  相似文献   

A preliminary study on the diversity of fish species and marine fish faunas of the South China Sea     

Caihua Ma  Kui You  Meizhao Zhang  Fengqi Li  Dagang Chen 《中国海洋大学学报(英文版)》2008,7(2):210-214

There are 3048 species offish occurring in the China Seas (CS), of which at least 2321 species are found in the South China Sea (SCS), belonging to 35 orders, 236 families and 822 genera. The fish species diversity is analyzed in this paper based on biogeography, biostatisties, fishing methods, etc. It is found that the regional environment, especially biological factors, plays an important role in the distribution of faunas, and there are two fish faunas in the SCS, one in the north and another in the center and south. This regional division is of value for sustainable fishery production and efficient management of fishery resources.  相似文献   

南海深海生物多样性国际研究态势与热点分析          下载免费PDF全文

张灿影  徐奎栋  焦英毅  张均龙  冯志纲  陈春 《海洋科学》2023,47(3):128-136

南海是西太平洋边缘海,有陆架、陆坡、岛礁、深海平原、海山、冷泉等多种生境,近10年来南海逐渐成为世界深海研究的热点。南海是中国海洋生物多样性最高的区域,与作为海洋生物多样性中心的印太珊瑚大三角区具有一定的环境与生物连通性,对南海的深海生物探测研究可丰富对西太平洋及印太交汇区生物多样性及地理分布格局的认知。目前有关南海的生物多样性研究主要集中在北部陆架浅海及岛礁,对于深海生物多样性认知明显不足。本研究梳理了全球深海生物多样性的主要国际战略布局,并对南海深海生物多样性SCIE论文发表情况进行了综合分析,探讨了南海深海生物多样性研究态势,对未来南海深海生物多样性调查与研究提出了研究展望和建议。  相似文献   

环境RNA技术在水生生态系统生物多样性监测中的应用          下载免费PDF全文

李文琼  代书勤  张辉  线薇薇 《海洋科学》2023,47(8):90-100

随着人类活动在全球范围内的不断增强，水生生态系统的生物多样性丧失，群落结构发生巨大变化。因此，进行准确可靠的生物多样性监测来确定目标区域的物种丰度和群落结构对生态保护和资源可持续利用至关重要。环境DNA技术（eDNA）作为一种非入侵性的新手段，正在迅速发展，然而，eDNA技术易出现假阳性，从而导致实时生物多样性监测不准确的现象仍然普遍存在。与eDNA技术相比，环境RNA技术（eRNA）的快速降解使得它具有减少eDNA监测结果假阳性的潜力。本文概述了eRNA技术在水生生态系统的生物多样性监测中的可行性，主要从eRNA技术在水生生态系统中的可检测性和提高检测分辨率的潜力两个方面来介绍；综述了eRNA技术目前在水生生态系统生物多样性监测方面的研究进展；指出了eRNA技术目前存在的问题并分析了未来的研究方向。本文对未来将eRNA技术实际应用于水生生态系统的生物多样性监测、生态保护和资源可持续利用具有一定的参考价值。  相似文献   

夏季庙岛群岛大型底栖动物群落特征          下载免费PDF全文

张悦  于国旭  徐勇  李新正  王金宝  隋吉星 《海洋科学》2023,47(7):96-110

根据2022年8月大潮期间庙岛群岛岛屿的潮间带和潮下带大型底栖动物的调查结果,对其种类组成、数量分布、优势种、多样性以及群落结构特点进行了研究。结果表明:本次潮间带定量调查共鉴定大型底栖动物52种,其中甲壳动物最多(17种);定性调查共鉴定42种,软体动物最多(30种)。潮下带定量调查共鉴定大型底栖动物39种,低于潮间带定量调查,其中软体动物最多(26种)。潮间带大型底栖动物平均丰度为234个/m²,平均生物量为82.82g/m²。潮下带平均丰度为180.2个/m²,平均生物量为708.02g/m²。潮间带大型底栖动物多样性指数(H′)、丰富度指数(D)和均匀度指数(J′)平均值分别为1.187、1.723和0.540;潮下带H′、D和J′平均值均高于潮间带,分别为1.301、2.204和0.669。在本次潮间带定量调查中,大型底栖动物优势种为施氏玻璃钩虾(Hyaleschmidti)、平背蜞(Gaeticedepressus)、潮间海钩虾(Pontogeneialittorea)等。潮下带优势种与...  相似文献