scholarly journals Persistence of Enterobacteriaceae Drawn into a Marine Saltern (Saline di Tarquinia, Italy) from the Adjacent Coastal Zone

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1443
Author(s):  
Susanna Gorrasi ◽  
Marcella Pasqualetti ◽  
Andrea Franzetti ◽  
Alejandro Gonzalez-Martinez ◽  
Jesus Gonzalez-Lopez ◽  
...  
Keyword(s):  
Coastal Zone ◽  
Coastal Waters ◽  
High Abundance ◽  
Hypersaline Environments ◽  
Anthropic Impact ◽  
Clinical Specimens ◽  
Health Implications ◽  
Important Health ◽  
Potential Reservoir

Enterobacteriaceae is present in various niches worldwide (i.e., the gastrointestinal tracts of animals, clinical specimens, and diverse environments) and hosts some well-known pathogens (i.e., salmonellas, shigellas and pathogenic coliforms). No investigation has focused on its occurrence in marine salterns, and it is not clear if these hypersaline environments could be a reservoir for these bacteria including some potentially harmful members. In this study, a two-year metabarcoding survey was carried out on samples collected from different ponds of the “Saline di Tarquinia” salterns and the nearby coastal waters. Enterobacteriaceae was recorded almost constantly in the seawaters feeding the saltern. Its abundance was generally higher in the sea than in the ponds, probably due to the higher anthropic impact. The same trend was evidenced for the key genus (Escherichia/Shigella) and OTU (OTU 5) of the Enterobacteriaceae community. Various parameters affected taxon/OTU abundance: Enterobacteriaceae, Escherichia/Shigella and OTU5 decreased with increasing salinity and rains; moreover, Escherichia/Shigella and OTU 5 were higher in autumn than in spring. Although Enterobacteriaceae did not seem to find the most favourable conditions for a high-abundance persistence in the saltern environment, it did not disappear. These observations suggested this environment as a potential reservoir for bacteria with possible important health implications.

Urban Wastewater Discharge and Bacteriological Quality of Receiving Coastal Waters: Processes and Modelling

1993 ◽  
Vol 27 (12) ◽  
pp. 223-226
Author(s):  
J.-F. Guillaud ◽  
M. Pommepuy ◽  
E. Dupray ◽  
J.-C. Salomon ◽  
B. Thouvenin
Keyword(s):  
Coastal Zone ◽  
Coastal Waters ◽  
Wastewater Treatment Plants ◽  
Enteric Bacteria ◽  
Wastewater Discharge ◽  
Urban Wastewater ◽  
Bacteria Transport

The aim of this paper is to present some results of bacterial studies which were developed by IFREMER in coastal discharge areas of urban wastewaters; they are focused on the determination of bacterial inputs by wastewater treatment plants, the role of environmental factors on the enteric bacteria survival in the coastal zone, and the modelling of bacteria transport and disappearance in order to provide useful management information for minimizing faecal pollution in the coastal zone.

scholarly journals Monitoring the circulation of coastal waters off the Southern coast of Crimea

2019 ◽  
Vol 485 (4) ◽  
pp. 507-510
Author(s):  
V. A. Ivanov ◽  
A. S. Kuznetsov ◽  
A. N. Morozov
Keyword(s):  
Spectral Analysis ◽  
Coastal Zone ◽  
Coastal Waters ◽  
Low Frequency ◽  
Water Dynamics ◽  
Southern Coast ◽  
Jet Streams ◽  
Integrated Monitoring ◽  
Low Frequency Oscillations ◽  
The Crimea

The paper presents the results of integrated monitoring of water dynamics in the coastal zone off the Southern coast of the Crimea for 2008-2016. The regime and features of circulation of coastal waters were determined. An intensive contribution of low-frequency oscillations of coastal currents at the seasonal and synoptic scales was identified based on the results of spectral analysis of a nine-year set of vector dynamics series. For water fluctuations in the coastal zone, the alongshore structure of reciprocating jet streams caused by water dynamics at the shelf and continental slope dominates.

scholarly journals Carbon dynamics and CO<sub>2</sub> air-sea exchanges in the eutrophied coastal waters of the Southern Bight of the North Sea: a modelling study

2004 ◽  
Vol 1 (2) ◽  
pp. 147-157 ◽  
Author(s):  
N. Gypens ◽  
C. Lancelot ◽  
A. V. Borges
Keyword(s):  
Surface Water ◽  
Coastal Zone ◽  
North Sea ◽  
Coastal Waters ◽  
Co2 Flux ◽  
Open Ocean ◽  
Atmospheric Co2 ◽  
Southern Bight ◽  
The North ◽  
The North Sea

Abstract. A description of the carbonate system has been incorporated in the MIRO biogeochemical model to investigate the contribution of diatom and Phaeocystis blooms to the seasonal dynamics of air-sea CO2 exchanges in the Eastern Channel and Southern Bight of the North Sea, with focus on the eutrophied Belgian coastal waters. For this application, the model was implemented in a simplified three-box representation of the hydrodynamics with the open ocean boundary box ‘Western English Channel’ (WCH) and the ‘French Coastal Zone’ (FCZ) and ‘Belgian Coastal Zone’ (BCZ) boxes receiving carbon and nutrients from the rivers Seine and Scheldt, respectively. Results were obtained by running the model for the 1996–1999 period. The simulated partial pressures of CO2 (pCO2) were successfully compared with data recorded over the same period in the central BCZ at station 330 (51°26.05′ N; 002°48.50′ E). Budget calculations based on model simulations of carbon flow rates indicated for BCZ a low annual sink of atmospheric CO2 (−0.17 mol C m-2 y-1). On the opposite, surface water pCO2 in WCH was estimated to be at annual equilibrium with respect to atmospheric CO2. The relative contribution of biological, chemical and physical processes to the modelled seasonal variability of pCO2 in BCZ was further explored by running model scenarios with separate closures of biological activities and/or river inputs of carbon. The suppression of biological processes reversed direction of the CO2 flux in BCZ that became, on an annual scale, a significant source for atmospheric CO2 (+0.53 mol C m-2 y-1). Overall biological activity had a stronger influence on the modelled seasonal cycle of pCO2 than temperature. Especially Phaeocystis colonies which growth in spring were associated with an important sink of atmospheric CO2 that counteracted the temperature-driven increase of pCO2 at this period of the year. However, river inputs of organic and inorganic carbon were shown to increase the surface water pCO2 and hence the emission of CO2 to the atmosphere. Same calculations conducted in WCH, showed that temperature was the main factor controlling the seasonal pCO2 cycle in these open ocean waters. The effect of interannual variations of fresh water discharge (and related nutrient and carbon inputs), temperature and wind speed was further explored by running scenarios with forcing typical of two contrasted years (1996 and 1999). Based on these simulations, the model predicts significant variations in the intensity and direction of the annual air-sea CO2 flux.

Relations between optical properties, dinoflagellates and zooplanktonic crustaceans in Antofagasta Bay (23°S, Chile)

Crustaceana ◽  
2020 ◽  
Vol 93 (1) ◽  
pp. 41-49
Author(s):  
Patricio De los Ríos ◽  
Angel Contreras ◽  
Gladys Lara ◽  
Mirtha Latsague ◽  
Carlos Esse
Keyword(s):  
Optical Properties ◽  
Primary Productivity ◽  
Coastal Waters ◽  
Climate Changes ◽  
Global Climate ◽  
High Abundance ◽  
Global Climate Changes ◽  
High Diversity ◽  
High Reflectance ◽  
Chlorophyll Concentrations

Abstract Antofagasta Bay is characterized by a high primary productivity due to the presence of the cold Humboldt Stream that is associated with a high diversity in flora and fauna in the benthic and pelagial environments of the Chilean west coast. Nevertheless, due to the global climate changes, the existing biodiversity patterns change as well. The aim of the present study was to analyse Antofagasta Bay for determining the existence of patterns between optical properties of the water, and the phytoplankton and zooplankton. The results show that one site had high chlorophyll concentrations, high reflectance, a high abundance of the dinoflagellate genus Dinophysis, and a high abundance of copepodites, whereas five sites had low chlorophyll concentrations, a low reflectance value, low copepodite abundances, and high abundances of dinoflagellates of the genera Ceratium, Gymnodinium and Prorocentrum. These results are similar to earlier observations for the coastal waters along northern Chile.

scholarly journals Salmon lice-induced mortality of Atlantic salmon during post-smolt migration in Norway

2020 ◽  
Author(s):  
Ingrid A Johnsen ◽  
Alison Harvey ◽  
Pål Næverlid Sævik ◽  
Anne D Sandvik ◽  
Ola Ugedal ◽  
...  
Keyword(s):  
Environmental Impact ◽  
Atlantic Salmon ◽  
Coastal Zone ◽  
Coastal Waters ◽  
State Of The Art ◽  
Regulatory System ◽  
Data Sets ◽  
Infestation Level ◽  
Wild Salmon ◽  
Salmon Lice

Abstract The expansion of salmonid aquaculture has resulted in environmental challenges, including salmon lice that may infest both farmed and wild fish. For wild Atlantic salmon post-smolts that migrate from their rivers to the ocean, the first phase of their journey in the coastal zone, where aquaculture occurs, is critical when considering lice exposure. To evaluate the lice influence during the post-smot migration we have developed a migration model. An archive with spatiotemporal concentrations of lice larvae in Norwegian coastal waters has been established using a combination of state-of-the-art hydrodynamic and lice biology models. To estimate lice-induced mortality of wild salmon from Norwegian rivers, the infestation level on the virtual post-smolts was calibrated to match that observed on wild post-smolts genetically assigned their rivers of origin. The lice infestation pressure was modelled on post-smolts from 401 rivers covering all of Norway. Based on this, aquaculture-produced salmon lice-induced mortality of wild salmon post-smolts was estimated to be &lt;10% for 179 rivers, 10–30% for 140 rivers, and &gt;30% for 82 rivers in 2019. Estimated mortalities were used together with other data sets to evaluate aquaculture sustainability in Norway. The aquaculture regulatory system represents a globally leading example of science-based management that considers the environmental impact.

scholarly journals Spatio-temporal variability in hydro-chemical characteristics of coastal waters of Salimpur, Chittagong along the Bay of Bengal

2016 ◽  
Vol 4 (1) ◽  
pp. 335 ◽  
Author(s):  
Avijit Talukder ◽  
Debbrota Mallick ◽  
Tasnuba Hasin ◽  
Ishrat Zahan Anka ◽  
Md Mehedi Hasan
Keyword(s):  
Water Quality ◽  
Coastal Zone ◽  
Coastal Waters ◽  
Temporal Variability ◽  
Seasonal Characteristics ◽  
Ship Breaking ◽  
Investigation Period ◽  
Spatio Temporal ◽  
Negative Impacts ◽  
Freshwater Inputs

Diverse seasonal characteristics of hydro-chemical parameters in the coastal zone are significantly related to aquaculture development. In this paper, general water quality condition derived from laboratory analysis from the coastal waters of Salimpur, Chittagong is presented. Samples were collected from onshore and offshore site of two adjacent coastal locations named as North Salimpur (experimental location) and South Kattoli (control) during a monsoon and a dry season spanning 2013-14. The spatio-temporal variability of studied parameters were found as air temperature 26.5-32.5 ˚C, water temperature 23-33 °C, pH 7.1-7.9, DO 4.29-7.11 mg/L, BOD 1.10-3.25 mg/L, salinity 1.6-21 ppt, EC 3.40-35.68 mS/cm, TDS 2.02-21.99 g/L, TSS 0.62-2.76 g/L, transparency 4.5-14 cm, precipitation 64-1992 mm, NO2-N 1.94-2.58 µg/L, PO4-P 0.45-1.84 µg/L, SiO3-Si 130.46-956.31 µg/L during investigation period. Average values of physicochemical parameters were found to be in compliance with standard guidelines. The ship breaking activities near experimental location possess negative impacts on local geomorphology, freshwater inputs, precipitation and aquatic environment as well. Moreover, wind driven forces, tidal action, wave characteristics and changes in monsoon pattern regulate the coastal processes. This research suggests the importance of regular monitoring to assess present status of water quality and future prospect of aquaculture in the Chittagong coastal zone.

scholarly journals To the study of macrophytobenthos of coastal waters of Karadzhinsky Plot on Tarkhankut Peninsula (Crimea, Black Sea)

2020 ◽  
Vol 5 (1) ◽  
pp. 78-89
Author(s):  
S. Ye. Sadogurskiy
Keyword(s):  
Coastal Zone ◽  
Black Sea ◽  
Coastal Waters ◽  
Structural Features ◽  
Habitats Directive ◽  
The Black Sea ◽  
Nature Protection ◽  
Protected Natural Area ◽  
Nature Park ◽  
Eu Habitats Directive

Composition and distribution of seaweeds in coastal waters of the Karadzhinskaya Bay, adjacent to the southern cluster of a specially protected natural area “Tarkhankut” Nature Park (Crimea, Tarkhankut Peninsula, Black Sea), are described and discussed. Peculiarities of the coastal zone geomorphology determine structural features of macrophytobenthos and its intermediate position in relation to macrophytobentos of adjacent abrasive and accumulative coasts. Totally 57 species of seaweeds were identified (Chlorophyta – 12, Ochrophyta (сl. Phaeophyceae) – 12, Rhodophyta – 33); 21 of them occur in pseudolittoral, and 56 – in sublittoral. Biomass ranges from 0.5 kg per m² in pseudolittoral to 4.5 kg per m² in sublittoral. Nature and quantity of benthic vegetation, flora composition, and ratio of main ecological-floristic groups of macrophytobenthos are generally characteristic for the Tarkhankut-Sevastopol hydrobotanical region of the Black Sea. A rare fraction of flora includes 14 taxa listed in nature conservation lists of various ranks. The biotope subjects to special protection according to the EU Habitats Directive (Directive 92/43/EEC). The territorial-aquatic complex is important both from nature protection and recreation points of view. Its conservation will contribute to structural and functional integrity of Black Sea coastal zone ecosystem.

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