Biodegradation of Acetamiprid by Isolated Bacterial Strain Rhodococcus sp. BCH2 and Toxicological Analysis of Its Metabolites in Silkworm (Bombax mori)          下载免费PDF全文

Swapnil S. Phugare  Jyoti P. Jadhav 《洁净——土壤、空气、水》2015,43(2):296-304

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Robust planning for restoring diadromous fish species in New Zealand's lowland rivers and streams     

J.R. Leathwick  J. Elith  D. Rowe  K. Julian 《新西兰海洋与淡水研究杂志》2013,47(3):659-671

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乐清湾口海域春、秋季鱼类种类组成和数量分布   总被引：1，自引：0，他引：1  

闫丽娜  叶深  李德伟  周青松  谢旭  郑基  程郡  俞存根 《海洋与湖沼》2013,44(4):1062-1067

根据2012年4月(春季)、10月(秋季)在乐清湾口的大小门岛海域开展拖网渔业资源调查所获得的鱼类数据, 用渔获率作为鱼类资源数量分布的指标, 对乐清湾口调查海域的鱼类种类组成、区系特点、数量分布等进行了分析。结果表明, 乐清湾口海域春、秋两季共获得并鉴定出的鱼类有49种, 隶属于10目26科,其中以鲈形目最多, 有20种, 占鱼类总种数的40.8%; 鲱形目次之, 有9种, 占鱼类总种数的18.4%; 优势种有龙头鱼和刀鲚; 数量是秋季较多且分布较均匀; 根据鱼类适温性可将该海域的鱼类分为暖水性和暖温性2种适温类型, 其中暖水性种类占55.1%; 同时, 根据其生态习性, 可分为河口性、沿岸性和近海性3种生态类群。  相似文献   

Organic wastewater effects on benthic invertebrates in the Manawatu River     

D. M. Suckling 《新西兰海洋与淡水研究杂志》2013,47(3-4):263-270

The effects of the 3 main wastewater discharges on the benthic fauna of the Manawatu River were studied between March 1979 and January 1980. At least 4 replicate Surber samples were taken from each of 6 sites, on 5 occasions during this period. Deleatidium sp. (Ephemeroptera), Hydora sp. (Coleoptera), and the Chironomidae were the most useful indicator organisms, according to a ranking system based on the occurrence of significant differences (P<0.05) between populations at different sites. These taxa exhibited significant differences between sites in about 70% of all inter‐site comparisons, using Mann‐Whitney U‐tests. The Coefficient of Similarity was successful at summarising the comparisons between the clean‐water and down‐stream sites, ranging between 95% similarity to the clean‐water site for a recovery site in winter, and less than 10% similarity to the clean water site for the lower reaches in summer. It is suggested that relative indices may be more appropriate than absolute indices for measuring water pollution. Water quality, indicated by species diversity, was generally good (allowing for the effects of agricultural runoff), although midsummer organic loading induced marked changes in benthic species composition, including the disappearance of Deleatidium sp. from several sites.  相似文献   

Fishes from Porirua and Pauatahanui inlets: Occurrence in gill nets     

J. B. Jones  J. D. Hadfield 《新西兰海洋与淡水研究杂志》2013,47(4):477-484

From June 1983 to July 1984, gill nets were set at intervals of approximately one month in the Porirua and Pauatahanui Inlets, Wellington. During this period, 24 species of fish were caught, bringing the total number of species known from the two inlets to 43. The inlets are a nursery area for juvenile Callorhynchus milii, Mustelus lenti‐culatus, Rhombosolea plebeia, and Arripis trutta.  相似文献   

New species of Spongia (Porifera: Demospongiae: Dictyoceratida) from New Zealand,and a proposed subgeneric structure     

Steve de C. Cook  Patricia R. Bergquist 《新西兰海洋与淡水研究杂志》2013,47(1):33-58

This paper is the fifth in a series revising the taxonomy of New Zealand dictyoceratid sponges (phylum Porifera, subclass Ceractinomorpha, order Dictyoceratida). Six new species of the genus Spongia are added to New Zealand's known fauna. The use of subgenera within the genus Spongia is discussed, and two new subgenera are proposed. The genus Hippospongia is revised, and an emended generic diagnosis is proposed.  相似文献   

绿藻浒苔对浮游植物群落结构影响研究   总被引：1，自引：0，他引：1  

张雪  栾青杉  孙坚强  王俊 《海洋科学》2013,37(6):24-31

为了解浒苔(Enteromorpha prolifera)对浮游植物群落的影响,于2011年7月末在青岛第三海水浴场附近海域,现场采集了浒苔鲜组织和含自然浮游植物群落的海水,进行了10d 的浒苔与浮游植物群落室内受控共培养实验。设计4个处理,包括1个对照组和3个实验组,每个处理设置3个平行。对照组未添加浒苔,实验组分别按照0.8(低)、2.4(中)和7.2 g/L(高)的湿质量进行添加。研究结果表明,在整个共培养期间,硅藻的生长受到了浒苔明显的抑制,在3个不同的实验组细胞丰度显著降低(ANOVA, P<0.05),降幅分别达到84.1%、92.1%和95.3%。优势种长菱形藻(Nitzschia longissima)在高实验组的第10天,细胞丰度更是低至对照组的0.38%。甲藻丰度在各组皆表现出先升高后降低的趋势,优势种利玛原甲藻(Prorocentrum lima)在高实验组的第3天,细胞丰度高达对照组的98.7倍。浒苔通过影响浮游植物细胞丰度和优势种演替,改变了浮游植物的群落结构。高密度浒苔的存在会使浮游植物优势种组成趋于单一,物种多样性程度和群落稳定性大为降低。但是,浒苔对单细胞浮游植物的克生作用可以抑制赤潮藻的过度繁殖,有益于赤潮的生物防治和水域环境的生态修复。  相似文献   

Recruitment,habitat selection and larval photoresponse of Paraleucilla magna (Porifera,Calcarea) in Rio de Janeiro,Brazil     

André Padua  Emilio Lanna  Carla Zilberberg  Paulo César de Paiva  Michelle Klautau 《Marine Ecology》2013,34(1):56-61

Little is known about the recruitment and behaviour of sponge larvae, especially of the class Calcarea. The calcareous sponge Paraleucilla magna is very common in Southeast Brazil, where it is considered a cryptogenic species. This study quantified recruitment rates in shaded and illuminated habitats for 2 years in Rio de Janeiro, Brazil, and analyzed larval photoresponses of this species. Four structures, each containing a shaded and an illuminated surface, were exchanged every 3 months for 2 years. The number of recruits was quantified on each plate. In the laboratory, larvae of P. magna were placed in half‐shaded Petri dishes and the number of settlers in each side was counted after 24 h. Paraleucilla magna recruited continuously throughout the experiment. Recruits occurred in greater abundance on shaded surfaces than on illuminated surfaces, and the larvae were negatively phototactic in vitro. Despite the possible influence of other factors in the recruitment of sponges (such as sedimentation, competition and predation), the prevalence of P. magna in shaded habitats may also be related to larval choice.  相似文献   

我国近海镉的水质基准及生态风险研究   总被引：3，自引：1，他引：2  

穆景利  王莹  张志锋  王菊英 《海洋学报》2013,35(3):137-146

以镉为研究对象,在分析我国海水水生生物区系特征的基础上,筛选了栖息我国境内的海水水生生物物种的毒性数据,采用基于物种敏感度分布(SSD)模型不同拟合曲线(log-logistic、log-normal、 Gumbel、Weibull和Burr Ⅲ)的方法分别推导了保护水生生物的海水水质急性基准值和慢性基准值,并分析了引入淡水数据推导海水水质基准的可行性;同时,结合我国海水中镉的分布特征,对海水中镉的生态风险了初步评价。结果表明:Burr Ⅲ对各组数据拟合的效果最佳;引入淡水数据可能会对海水生物造成"过保护"风险;基于Burr Ⅲ对海水数据所推导的急性和慢性基准推荐值分别为63.0 μg/L和8.0 μg/L;将我国近岸水体中镉的浓度与基准值比较显示,我国近岸水体中镉对水生生物的潜在风险较低。研究结果有望为我国水质基准研究及标准制定提供参考。  相似文献   

Repeat photography as a tool for detecting and monitoring historical changes in South African coastal habitats     

《African Journal of Marine Science》2013,35(3):387-398

Repeat photography was used to illustrate long-term changes occurring in coastal habitats in the Western Cape, South Africa. Historic images were sourced from books and theses, the public and subject specialists, and repeat photographs were then taken from the same perspectives. Visible changes could be categorised into four types: (1) changes in species’ ranges; (2) biological invasions; (3) sea level changes; and (4) direct engineering impacts. In terms of range changes, the images depict a progressive easterly spread of the cold-water kelp Ecklonia maxima and parallel easterly contraction of the warmer-water mussel Perna perna, both evidence for declining water temperatures along the South-West Coast. Since c. 1980 most shores have also become conspicuously invaded by the alien Mediterranean mussel Mytilus galloprovincialis, while those on the West Coast have also been visibly invaded by the more-recently introduced Pacific barnacle Balanus glandula. No changes in vertical zonation due to changing sea levels could be detected, despite suitable images being available. Construction along the shore has radically altered the appearance of the shoreline in urban areas. Repeat photography thus proved a useful tool for both detecting and dramatically illustrating historic changes over the past century. These changes have altered substantially both the appearance and ecological attributes of many rocky shores in this region.  相似文献