The Dunbar-Hunter expedition (1804-1805): early analyses of spring waters in the Louisiana Purchase     

Hanor JS 《Ground water》2007,45(6):803-807

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Biodegradation of petroleum products in experimental plots in Antarctic marine sediments is location dependent     

Powell SM  Harvey PM  Stark JS  Snape I  Riddle MJ 《Marine pollution bulletin》2007,54(4):434-440

Clean sediment collected from O'Brien Bay, East Antarctica, was artificially contaminated with a mix of Special Antarctic Blend diesel fuel and lubricating oil and deployed in two uncontaminated locations (O'Brien and Sparkes Bays) and a previously contaminated bay (Brown Bay) to evaluate whether a history of prior contamination would influence the biodegradation process. Detailed analysis of the hydrocarbon composition in the sediment after 11 weeks revealed different patterns of degradation in each bay. Biodegradation indices showed that hydrocarbon biodegradation occurred in all three bays but was most extensive in Brown Bay. This study shows that even within a relatively small geographical area, the longevity of hydrocarbons in Antarctic marine sediments can be variable. Our results are consistent with faster natural attenuation of spilt oil at sites with previous exposure to oil but further work is needed to confirm this. Such information would be useful when evaluating the true risk and longevity of oils spills.  相似文献   

From policy to practice in developing ecologically sustainable fisheries: reply to Valdimarsson?     

Gray JS  Dayton P  Thrush S  Kaiser MJ 《Marine pollution bulletin》2007,54(4):491-3; discussion 495-500

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Harpiosquilla harpax (Crustacea, Stomatopoda) as a biomonitor of trace metal contamination in benthic sediments in Hong Kong waters     

Ng JS  Lui KK  Lai CH  Leung KM 《Marine pollution bulletin》2007,54(9):1523-1529

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On effects of trawling, benthos and sampling design     

Gray JS  Dayton P  Thrush S  Kaiser MJ 《Marine pollution bulletin》2006,52(8):840-843

The evidence for the wider effects of fishing on the marine ecosystem demands that we incorporate these considerations into our management of human activities. The consequences of the direct physical disturbance of the seabed caused by towed bottom-fishing gear have been studied extensively with over 100 manipulations reported in the peer-reviewed literature. The outcome of these studies varies according to the gear used and the habitat in which it was deployed. This variability in the response of different benthic systems concurs with established theoretical models of the response of community metrics to disturbance. Despite this powerful evidence, a recent FAO report wrongly concludes that the variability in the reported responses to fishing disturbance mean that no firm conclusion as to the effects of fishing disturbance can be made. This thesis is further supported (incorrectly) by the supposition that current benthic sampling methodologies are inadequate to demonstrate the effects of fishing disturbance on benthic systems. The present article addresses these two erroneous conclusions which may confuse non-experts and in particular policy-makers.  相似文献   

Total mercury in sediments and in Brazilian Ariidae catfish from two estuaries under different anthropogenic influence     

Azevedo JS  Braga ES  Favaro DT  Perretti AR  Rezende CE  Souza CM 《Marine pollution bulletin》2011,62(12):2724-2731

Santos-São Vicente estuary, located in São Paulo State, Brazil, has a history of contamination by inorganic chemicals such as mercury (Hg). In the 1980s the Cubatão was considered one of the most polluted sites in the world as a consequence of the intense industrial activities located in the city close to the estuary. To provide data and evaluate the local biota, total mercury (THg) contents were determined in sediments and in fish, Cathorops spixii, from different areas of the Santos-São Vicente estuary. For comparison, samples were also collected in a non-polluted system with similar hydrochemistry characteristics, the Cananeia estuary. The water characteristics and THg levels in sediment and fish samples confirmed a high human influence in the Santos-São Vicente estuary. The lowest THg values, observed in Cananeia, were evidence of low anthropogenic influence. High values observed in Santos-São Vicente show the necessity for a monitoring program.  相似文献   

Perfluorinated compounds in estuarine and coastal areas of north Bohai Sea, China   总被引：3，自引：0，他引：3  

Wang T  Lu Y  Chen C  Naile JE  Khim JS  Park J  Luo W  Jiao W  Hu W  Giesy JP 《Marine pollution bulletin》2011,62(8):1905-1914

Perfluorinated compounds (PFCs) in water, sediment, soil, and biota collected from estuarine and coastal areas of the north Bohai Sea, China, were determined by use of HPLC-MS/MS. Significant concentrations of PFCs were found in water (mean: 18.4 ng/l) and biologic samples (fish: 265 ng/g dw), while concentrations of PFCs in soils and sediments were less. The predominately detected compound was perfluorooctanesulfonate (PFOS), with a maximum concentration of 30.9 ng/l in water and 791 ng/g dw in fish. Concentrations of PFCs were significantly greater in the Liaohe River system than other locations, which suggests point sources in this urbanized and industrialized region. PFOS concentrations in water and biota were both less than the reported threshold concentrations. Detection of PFCs at relatively great concentrations in various environmental matrices from this region suggested that further studies characterizing concentrations of PFCs, their sources and potential risk to both humans and wildlife are needed.  相似文献   

耳穴埋针配合体针治疗冲任失调型痤疮30例临床观察          下载免费PDF全文

周薇  王佳捷  周仲瑜 《应用海洋学学报》2022,38(1):73

目的：观察耳穴埋针配合体针治疗冲任失调型痤疮的临床疗效。方法：将60 例冲任失调型痤疮患者随机分为治疗组与对照组,每组各30 例。治疗组采用耳穴埋针配合体针治疗,对照组采用体针治疗。2组均每天治疗1次,10次为1个疗程。疗程间休息3d再进行下1个疗程,共治疗3个疗程。比较2组综合疗效,治疗前后及随访1个月的痤疮综合分级系统（GAGS）评分、中医证候积分。结果：总有效率治疗组为80.0%（24/30）,对照组为76.7%（23/30）,2组比较,差异无统计学意义（P>0.05）。2组痤疮GAGS评分、中医证候积分治疗前后、随访1个月组内比较及随访1个月组间比较,差异均有统计学意义（P<0.05或P<0.01）。结论：耳穴埋针配合体针能有效改善冲任失调型痤疮患者皮损程度及中医症状。  相似文献   

Effects of settling organic matter on the bioaccumulation of cadmium and BDE-99 by Baltic Sea benthic invertebrates     

Thorsson MH  Hedman JE  Bradshaw C  Gunnarsson JS  Gilek M 《Marine environmental research》2008,65(3):264-281

Settling organic matter (OM) is the major food source for heterotrophic benthic fauna. The high sorption affinity of many contaminants for OM implies that OM can influence both the distribution and bioavailability of contaminants. Here, we experimentally examine the role of settling OM of various nutritional qualities on the bioaccumulation of cadmium and the flame retardant BDE-99 by three benthic invertebrates; Macoma balthica, Monoporeia affinis and Marenzelleria sp. Contaminants were associated with three types of OM; a microalgae (Tetraselmis spp.), lignin and sediment. Bioaccumulation of Cd was proportional to OM nutritional quality for all three species, and was species-specific in the order Marenzelleria>M. balthica>M. affinis. BDE-99 bioaccumulation was highest in the treatment with the most nutritious OM (Tetraselmis). Consequently, both benthic species composition and the nutritive value of organic matter settling to the seafloor can have a substantial effect on the bioaccumulation of both metals and organic contaminants.  相似文献   

验证技术：选择地震属性和验证其结果的技术     

Schu.  JS 《国外地质勘探技术》1999,(4):1-4,31

为了更好地确定井间岩石属性，特别是进行府层研究的需要，已经导致不断利用地震首属性作为岩石属性的标记，加果在井位能够确定地震和岩石属性的有效的关系，可以大大地降低井间的不确定性。  相似文献