Small reductions in cargo vessel speed substantially reduce noise impacts to marine mammals

Science Advances, Journal Year: 2023, Volume and Issue: 9(25)

Published: June 21, 2023

Global reductions in the underwater radiated noise levels from cargo vessels are needed to reduce increasing cumulative impacts marine wildlife. We use a vessel exposure simulation model examine how reducing source through slowdowns and technological modifications can lessen on mammals. show that area exposed ship reduces markedly with moderate source-level be readily achieved small speed. Moreover, all mammals despite longer time slower takes pass an animal. conclude global fleet reduced immediately by slowdowns. This solution requires no modification ships is scalable local speed sensitive areas ocean basins. Speed supplemented routing away critical habitats noise.

Language: Английский

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Numerical investigation of shipping noise in the Red Sea

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: March 11, 2024

Abstract Underwater noise pollution is a significant environmental issue that can have detrimental effects on marine ecosystems. One of the main sources underwater ship traffic, which has been shown to negatively impact animals by masking communication signals and altering their behaviors. This study represents first comprehensive analysis in Red Sea, wherein maps ships sailing through shipping lane Sea were simulated integrating both anthropogenic variables. These offer valuable insights for policymakers, enabling them make informed decisions implement targeted mitigation efforts.

Language: Английский

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Innovative solutions for coastal and offshore infrastructure in seawater mining: Enhancing efficiency and environmental performance

Desalination, Journal Year: 2024, Volume and Issue: 575, P. 117282 - 117282

Published: Jan. 21, 2024

Language: Английский

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Physiological and behavioral effects of underwater noise on the large yellow croaker (Larimichthys crocea) and the blackhead seabream (Acanthopagrus schlegelii)

Aquaculture, Journal Year: 2025, Volume and Issue: unknown, P. 742318 - 742318

Published: Feb. 1, 2025

Language: Английский

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Distance matters to sperm whales: Behavioural disturbance in response to both sonar received level and source distance

Marine Pollution Bulletin, Journal Year: 2025, Volume and Issue: 214, P. 117742 - 117742

Published: March 1, 2025

Understanding the main drivers of behavioural disturbance in deep-diving cetaceans would improve predictions anthropogenic noise effects on individual animals, habitats and populations. To investigate potential roles received level source distance disturbance, we tagged 14 sperm whales northern Norway with multi-sensor data loggers conducted dose-escalation experiments. Each experiment included 1 to 4 individuals involved multiple vessel passes ('exposure sessions', n = 25 total) by a navy frigate or research towing naval sonar, at different starting distances maximum levels. We analysed behaviour state series proxies for locomotor activity foraging success generalized additive mixed models. The probability occurrence non-foraging active was affected level, session order, decreased effort higher levels shorter distances, during subsequent sessions (indicating short-term sensitisation). Prey capture attempts increasing when kept foraging. Similar what has been suggested some populations blue beaked regularly exposed but unlike bottlenose more pristine waters, whale responses high-latitude ground.

Language: Английский

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Challenges in expert ratings of marine habitat and species sensitivity to anthropogenic pressures

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 12, 2025

Expert knowledge can help fill gaps in quantitative empirical information about complex ecological phenomena. We examined the level of agreement between 21 studies that collected expert ratings sensitivity species and habitats to human activities their pressures as input data for mapping impact on marine ecosystems. Our analyses revealed broad which many are sensitive to. These agreements reflect a common view main threats ocean In contrast, scores provided by individual experts varied both within across studies. Sensitivity with same method different regions were often more similar than region but methods. results highlight how inconsistencies design surveys lead variable outcomes. It is important employ consistent theoretically grounded methods protocols when eliciting species' pressures, ensure compatibility maintain rigour supporting effective management.

Language: Английский

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The copepod Acartia sp. is more sensitive to a rapid pressure drop associated with seismic airguns than Calanus sp.

Marine Ecology Progress Series, Journal Year: 2024, Volume and Issue: 730, P. 15 - 30

Published: Jan. 8, 2024

Airguns used in seismic surveys release high-pressure air, generating sound waves that may have adverse effects on marine life. However, knowledge of how exposure impacts zooplankton is limited. One key characteristic signals could potentially cause damage a rapid pressure drop. In this study, the drop (~2 bar) was re-created laboratory using tube. To determine range at which occurs, field around airgun array modeled. The mortality and swimming behavior were tested 2 common copepods, Acartia sp. Calanus sp., both immediately 5 h after treatment. Pressure-exposed showed higher rates (0 h: 5.6%; 10%) compared to controls, while only increased (3.3%). speed pressure-exposed 0.49 mm s -1 ; 0.52 ) lower than control treatment, whereas (2.64 differed This study demonstrates can negatively affect close range. results also show more sensitive suggesting potential species-specific from exposure. Identifying characteristics be harmful allows for accurate assessment most affected species occur.

Language: Английский

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Anthropogenic noise effects on Risso's dolphin vocalizations in the Gulf of Taranto (Northern Ionian sea, central Mediterranean sea)

Ocean & Coastal Management, Journal Year: 2024, Volume and Issue: 254, P. 107177 - 107177

Published: May 9, 2024

Anthropogenic noise may significantly affect marine mammals' vocalizations. The aim of this work is to describe for the first time acoustic features click trains, buzzes, burst pulses and whistles produced by Risso's dolphins in Gulf Taranto (Northern Ionian Sea, Central Mediterranean), concurrent levels which are exposed, potential reactive changes structure species About 6 h recordings were collected from April 2019 September 2022 during daytime boat surveys. Elevated ambient mainly present at frequencies lower than 63 Hz, about 1 kHz 50 likely attributable anthropogenic activity, such as shipping sonars. Even if all vocalizations can be disrupted, especially with increasing below between 20 kHz, trains most affected vocalizations, showing their Inter-Click-Interval Peak Amplitude. Since these used navigation searching prey, alteration raises concerns on negative effects well-being dolphin population Taranto.

Language: Английский

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Acoustic far field of a propeller working in the wake of a hydrofoil

Physics of Fluids, Journal Year: 2023, Volume and Issue: 35(12)

Published: Dec. 1, 2023

The Ffowcs-Williams & Hawkings (FWH) acoustic analogy is adopted to reconstruct the far field of a system consisting an upstream hydrofoil and downstream propeller, considering former at incidence angles 0°, 10°, 20°. Also comparisons against same propeller working in isolated conditions are reported. Fluid dynamic data from earlier high-fidelity, Large-Eddy Simulations (LES) on grid 1.7 × 109 points utilized. analysis demonstrates that, with some exceptions smallest frequencies, dominated by loading sound coming achieving its highest values pressure directions. In contrast, lowest occur plane, whose minima aligned spanwise direction hydrofoil. A strong dependence angle found, although decreasing toward higher frequencies. Interestingly, while shaft blade frequencies hydrofoil-propeller always than that open-water alone, as expected, harmonics frequency this not case. This may be due phenomena destructive interactions across sources surface or result shift signature even beyond range covered database available present study.

Language: Английский

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The underwater soundscape of the North Sea

Marine Pollution Bulletin, Journal Year: 2023, Volume and Issue: 198, P. 115891 - 115891

Published: Dec. 14, 2023

As awareness on the impact of anthropogenic underwater noise marine life grows, measurement programs are needed to determine current status areas and monitor long-term trends. The Joint Monitoring Programme for Ambient Noise in North Sea (JOMOPANS) collaborative project was funded by EU Interreg collect a unique dataset levels at 19 sites across Sea, spanning many different countries covering period from 2019 2020. ambient this has been characterised compared - setting benchmark future measurements area. By identifying clusters with similar sound characteristics three broadband frequency bands (25-160 Hz, 0.2-1.6 kHz, 2-10 kHz), geographical that similarly affected have identified. measured show persistent spatially uniform correlation wind speed high frequencies (above 1 kHz) distance ships mid (between 40 Hz 4 kHz). Correlation ocean velocity low (up 200 Hz), which susceptible nonacoustic contamination flow noise, also evaluated. These correlations were evaluated simplified linear scaling laws speeds derived. presented provides baseline shows spatial variability dominant sources must be considered predict reduction measures.

Language: Английский

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