We investigated the environmental impact of a deep water fish farm (190 m). Despite deep water and low water currents, sediments underneath the farm were heavily enriched with organic matter, resulting in stimulated biogeochemical cycling. During the first 7 months of the production cycle benthic fluxes were stimulated >29 times for CO(2) and O(2) and >2000 times for NH(4)(+), when compared to the reference site. During the final 11 months, however, benthic fluxes decreased despite increasing sedimentation. Investigations of microbial mineralization revealed that the sediment metabolic capacity was exceeded, which resulted in inhibited microbial mineralization due to negative feed-backs from accumulation of various solutes in pore water. Conclusions are that (1) deep water sediments at 8 °C can metabolize fish farm waste corresponding to 407 and 29 mmol m(-2) d(-1) POC and TN, respectively, and (2) siting fish farms at deep water sites is not a universal solution for reducing benthic impacts.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.envpol.2012.06.007 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Through restful waters and deep commotion: A study on burnout and health impairment of Italian seafarers from the JD-R model perspective.
F1000Res
January 2025
Psychology, University of Turin Department of Psychology, Turin, Piedmont, Italy.
Background: The work experience of seafarers differs significantly from other land-based occupations due to several factors, particularly remoteness and the restricted work environment. This study seeks to examine the impact of burnout and health impairment in the maritime industry, using the Job Demand-Resources theory as a framework.
Methods: To investigate these phenomena, an online questionnaire was sent to 239 Italian seafarers (94.
Microbial seafood safety assessment following a marine mucilage disaster in the Sea of Marmara.
Environ Microbiol Rep
February 2025
Faculty of Engineering, Department of Chemistry, Istanbul University-Cerrahpaşa, Istanbul, Türkiye.
Marine mucilage disasters, primarily caused by global warming and marine pollution, threaten food security and the sustainability of marine food resources. This study assessed the microbial risks to public health in common sole, deep-water rose shrimp, European anchovy, Atlantic horse mackerel and Mediterranean mussel following the mucilage disaster in the Sea of Marmara in 2021. The total viable count, total Enterobacteriaceae count and the presence of Escherichia coli O157:H7, Salmonella spp.
View Article and Find Full Text PDFEnhanced streamflow forecasting using hybrid modelling integrating glacio-hydrological outputs, deep learning and wavelet transformation.
Sci Rep
January 2025
UNESCO Centre of Water Law, Policy & Science, University of Dundee, Dundee, UK.
Understanding snow and ice melt dynamics is vital for flood risk assessment and effective water resource management in populated river basins sourced in inaccessible high-mountains. This study provides an AI-enabled hybrid approach integrating glacio-hydrological model outputs (GSM-SOCONT), with different machine learning and deep learning techniques framed as alternative 'computational scenarios, leveraging both physical processes and data-driven insights for enhanced predictive capabilities. The standalone deep learning model (CNN-LSTM), relying solely on meteorological data, outperformed its counterpart machine learning and glacio-hydrological model equivalents.
View Article and Find Full Text PDFSynthesis of a novel starch-based emulsion gel with remarkable low-temperature stability via esterification, ozone-oxidation and ion induction.
Carbohydr Polym
March 2025
Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education, Hubei Key Laboratory for Processing and Transformation of Agricultural Products, Wuhan Polytechnic University, Wuhan 430023, PR China; School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China. Electronic address:
A novel starch-based emulsion gel was designed via octenyl succinic anhydride (OSA) esterification, ozone oxidation, and ion (Ca) induction. The gel properties and low-temperature stability of emulsion gel with different oxidation time (0, 5, 10, 15, 25 min; OW-0, 5, 10, 15, 25) were systematically investigated. FTIR revealed that the oxidation of CC and -OH groups in OW-0 by ozone oxidation led to their cleavage into carbonyl groups, and than transformed to carboxyl groups.
View Article and Find Full Text PDFCarbon capture from controlled degassing of deep meromictic lakes: Insights to techno-economic and environmental feasibility, from the "killer lakes" in Cameroon.
Sci Total Environ
January 2025
The University of Yaoundé I, National Advanced School of Engineering of Yaoundé, P.O. Box: 8390, Yaoundé, Cameroon. Electronic address:
Carbon dioxide (CO) accumulation and emission are well-known features of deep lakes, making them a significant unavoidable carbon source to the atmosphere. In the case of meromictic lakes, degassing devices are installed to controllably release through a pipe the CO trapped in the bottom waters. Otherwise, the gas is emitted diffusely at the air-water surface or accidentally through a limnic eruption when the saturation limit is reached.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!