benthic foraminifera environment

The freshwater is supplied mainly by Vouga and Antuã rivers with average flows over 50 and 5 m3 s−1, respectively [26] and in less way by small rivers such as Boco river, which flows into the south Ílhavo channel, and the Caster river, which flows into the north of Ovar channel, with an average flow less than 1 m3 s−1 [25]. In cold seeps, the ecology of these organisms remains uncertain, in particular their ability to thrive during active phases of seepage. The authors would like to thank the collaboration of the Biology Department of Aveiro University, as well as Prof. Fernando Rocha of Aveiro University and Prof. Maria Antonieta Rodrigues, Universidade do Estado do Rio de Janeiro—UERJ for the support. Foraminiferal densities ranged from 28 to 98 specimens per 10 cm3 of sediment. According to these characteristics, Warwick [71] developed a method based on the abundance and biomass curves (ABC) for the detection of perturbation and to analyze the species response to environmental changes. The application of the ABC curves method in foraminiferal assemblages is a promising alternative to evaluate the environmental conditions and to access specific areas over time, and thus, they can be applied in environmental monitoring studies. Ammonia tepida has been invariably reported as a potential bioindicator of pollution at the majority of the coastal polluted sites [1]. The benthic Ammotium cassis (Parker 1870) is a Northern Hemisphere cold-water species, which needs high salinities for reproduction (Olsson, 1976). Salinity is a key factor for governing the structure (diversity) of foraminifera assemblages, as well as the concentrations of PTE, whereas the sensitive species (“marine species”) avoid the inner lagoonal environments. Indeed, the low densities of foraminifera around the DTCS diffusers illustrate the impact of environmental stress on the benthos. Location of Campos Basin in the Southwest Atlantic Ocean and sampling sites of the study area (Oceanprof and Habitats project): red circle (station in the Almirante Câmara canyon); and blue circle (station in the Almirante Câmara canyon). Deciphering the impacts of domestic and industrial pollutants is difficult because they often occur together in sheltered coastal environments (bays or estuaries). The values of density and biomass of living benthic foraminifera allow us to suggest that the Almirante Câmara canyon is a greater entrapment site of organic matter between 400 and 1000 m isobaths in comparison to the open areas at the same isobaths [76]. Deep-sea benthic foraminifera have played a central role in biostratigraphic, paleoecological, and paleoceanographical research for over a century. The geographical positions of the sampling stations were determined using the global positioning system (GPS), with the UTM datum SAT 69. These functional groups were used to calculate the FORAM Index. Naira Yamamoto, Dr. Raquel Fernanda Passos, Dr. Renata Hanae Nagai (Center for Marine Studies, Federal University of Paraná), Carla Ito, Dr. Leticia Burone (Facultad de Ciencias, Universidad de la República), Dr. Marina Fukumoto, MScs. [27], each of the main channels may be considered as presenting features of separate estuaries, owing to typical estuarine longitudinal gradients of water salinity and temperature, with values close to the characteristics of the oceanic water near the inlet and close to freshwater furthest upstream. … Furthermore, the noticeable wind effect can have an important influence on the lagoon circulation. The high supply of continental nutrients in addition to the nutrients of the coastal upwelling of Cabo Frio and adjacent areas disturbs the natural equilibrium of the biological communities of this area. (“Bénthos” is the Greek word for “depth” and describes life at the bottom of an ocean or lake.) Planktonic and benthic foraminifera reveal the state and the dynamics of the surface and deep ocean in the past. In fact, it is expected that the ABC curves can be used to identify both natural and anthropogenic stressors. By testing this method on datasets from five Italian TWs, we showed that EcoQ’s assessment based on foraminifera reflected changes in environmental conditions. The pollutants can enter the food chain and may even reach the highest trophic levels [2]. In 1999, exploration and production of hydrocarbons in deep waters (below 2000 m of depth) started in the Campos Basin. We are a community of more than 103,000 authors and editors from 3,291 institutions spanning 160 countries, including Nobel Prize winners and some of the world’s most-cited researchers. This allows for the use of these foraminifera to quantify environmental quality with respect to coral health. The distribution of the living foraminifera species results in several blooms throughout the year, for this reason the abundance and diversity of foraminifera is naturally temporally variable [17]. In this study, the variables considered for statistical analysis included the sand and mud contents, particulate organic matter flux to the sea floor, bottom water dissolved oxygen concentrations, calcium carbonate, total organic carbon, total nitrogen, and total lipid contents in the sediment (see details in [75]). Stations SSC3 ( 266 specimens ) provides us with unique insight into environment... Redox ( Eh ) were measured in water and sediments in each site continental discharge rainy... 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