Decrease of Zn, Cd and Pb concentrations in marine fish species over a decade as response to reduction of anthropogenic inputs: the example of Tagus estuary     

Raimundo J  Pereira P  Caetano M  Cabrita MT  Vale C 《Marine pollution bulletin》2011,62(12):2854-2858

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Galaxy number counts – IV. Surveying the Herschel Deep Field in the near-infrared     

H. J. McCracken  N. Metcalfe  T. Shanks  A. Campos  J. P. Gardner †  R. Fong 《Monthly notices of the Royal Astronomical Society》2000,311(4):707-718

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Post-Messinian evolutional patterns of the central Alboran Sea     

J. Campos  A. Maldonado  A. C. Campillo 《Geo-Marine Letters》1992,12(2-3):173-178

The northern Alboran Ridge margin depicts fault-bounded, structural blocks tilted downward to the basins. Post-Messinian sequences fill depressions on these blocks with thick depositional wedges thinning basinward. A change in the stress field after the Early Pliocene produced structural inversions and generalized uplifting of the Alboran Ridge from the Late Pliocene to Recent time.  相似文献   

Comparison of Phytoplankton Species Composition and Abundance in the Rias Arosa and Muros (NW Spain)   总被引：1，自引：0，他引：1  

M. J. Campos  J. Mariño 《Marine Ecology》1982,3(1):1-12

Abstract. Seasonal changes in phytoplankton species composition and abundance were studied in the Rias de Arosa and Muros (NW Spain) in November 1975, April and August 1976. Data on density and percentage contribution of species were used to calculate spatial and temporal relationships of phytoplankton communities by affinity matrices. The phytoplankton communities of both rias differed in species composition and abundance during the three sampling seasons. Diatoms dominated and total abundance was always higher in Arosa. Both rias have upwelling of nutrient-rich oceanic water but the Arosa has an intense raft aquaculture of the edible mussel Mytilus edulis.  相似文献   

Evaluating fish stock changes from the fragmentary catch and effort data of the Angolan fisheries     

De Campos Rosado  J. M. 《ICES Journal of Marine Science》1974,35(2):180-184

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The Influence of Environmental Factors and Fishing Pressure on Catch Rates of Diplodus vulgaris     

Vânia Baptista  Carlos J. A. Campos  Francisco Leitão 《Estuaries and Coasts》2016,39(1):258-272

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Improving seismotectonics and seismic hazard assessment along the San Ramón Fault at the eastern border of Santiago city,Chile     

A. Pérez  J. A. Ruiz  G. Vargas  R. Rauld  S. Rebolledo  J. Campos 《Natural Hazards》2014,71(1):243-274

The San Ramón Fault is an active west-vergent thrust fault system located along the eastern border of the city of Santiago, at the foot of the main Andes Cordillera. This is a kilometric crustal-scale structure recently recognized that represents a potential source for geological hazards. In this work, we provide new seismological evidences and strong ground-motion modeling from hypothetic kinematic rupture scenarios, to improve seismic hazard assessment in the Metropolitan area of Central Chile. Firstly, we focused on the study of crustal seismicity that we relate to brittle deformation associated with different seismogenic fringes in the main Andes in front of Santiago. We used a classical hypocentral location technique with an improved 1D crustal velocity model, to relocate crustal seismicity recorded between 2000 and 2011 by the National Seismological Service, University of Chile. This analysis includes waveform modeling of seismic events from local broadband stations deployed in the main Andean range, such as San José de Maipo, El Yeso, Las Melosas and Farellones. We selected events located near the stations, whose hypocenters were localized under the recording sites, with angles of incidence at the receiver <5° and S–P travel times <2 s. Our results evidence that seismic activity clustered around 10 km depth under San José de Maipo and Farellones stations. Because of their identical waveforms, such events are interpreted like repeating earthquakes or multiplets and therefore providing first evidence for seismic tectonic activity consistent with the crustal-scale structural model proposed for the San Ramón Fault system in the area (Armijo et al. in Tectonics 29(2):TC2007, 2010). We also analyzed the ground-motion variability generated by an M _w 6.9 earthquake rupture scenario by using a kinematic fractal k ^?2 composite source model. The main goal was to model broadband strong ground motion in the near-fault region and to analyze the variability of ground-motion parameters computed at various receivers. Several kinematic rupture scenarios were computed by changing physical source parameters. The study focused on statistical analysis of horizontal peak ground acceleration (PGAH) and ground velocity (PGVH). We compared the numerically predicted ground-motion parameters with empirical ground-motion predictive relationships from Kanno et al. (Bull Seismol Soc Am 96:879–897, 2006). In general, the synthetic PGAH and PGVH are in good agreement with the ones empirically predicted at various source distances. However, the mean PGAH at intermediate and large distances attenuates faster than the empirical mean curve. The largest mean values for both, PGAH and PGVH, were observed near the SW corner within the area of the fault plane projected to the surface, which coincides rather well with published hanging-wall effects suggesting that ground motions are amplified there.  相似文献   

Out‐of‐plane behaviour of a full scale stone masonry façade. Part 2: shaking table tests     

Alexandre A. Costa  António Arêde  Alfredo Campos Costa  Andrea Penna  Aníbal Costa 《地震工程与结构动力学》2013,42(14):2097-2111

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Fecal Sterols in Estuarine Sediments as Markers of Sewage Contamination in the Cubat?o Area, S?o Paulo, Brazil     

Valquíria Campos  Renata Fracácio  Leonardo F. Fraceto  André H. Rosa 《Aquatic Geochemistry》2012,18(5):433-443

Sterol biomarkers serve as an alternative method for detecting sewage pollution. Sterols were extracted from samples of surface sediment collected in Cubat?o (the Vila dos Pescadores and Vila Esperan?a communities) and quantified using GC–MS after Soxhlet extraction, cleanup, and derivatization. Fecal contamination was evaluated based on the concentration of coprostanol and the ratio of the selected sterols. The most abundant sterol was cholestanol, followed by coprostanol. The concentrations of coprostanol in surface sediments ranged from a minimum of 4.21?μg?g^?1 dry sediment (Vila dos Pescadores station) to a maximum of 8.32?μg?g^?1 dry sediment (Vila Esperan?a station). A coprostanol concentration of about 10?μg?g^?1 was found, indicating areas of high sewage contamination. Coprostanol levels at sewage stations were higher than in other Brazilian coastal areas, which may be attributed to the fraction of the population without sanitation services.  相似文献   

Image analysis of the solar corona from the July 11, 1991 eclipse     

O. T. Matsuura  E. Picazzio  R. P. Campos 《Solar physics》1993,144(1):89-99

Morphological properties of the corona and coronal structures, and modifications occurring in a time span greater than 3 hours were investigated through image analysis of three successive color pictures obtained by the Multi-station International Coronal Experiment (MICE). The model of Saito and Akasofu (1987) for the general magnetic field of the Sun was a suitable framework for interpreting the observational results. Color-index images allowed a closer inspection of the relationships between rays and underlying chromospheric activity. Besides the chromospheric active centres, the rays exhibited clear morphological alterations. Suggestions are presented for future observational efforts searching for slight morphological changes and tiny fluctuations in brightness and color-indices.  相似文献