Marine soundscape shaped by fishing activity

Coquereau, Laura; Lossent, Julie; Grall, Jacques; Chauvaud, Laurent

doi:10.1098/rsos.160606

Cited by 27 publications

(27 citation statements)

References 18 publications

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“…Dredging also particularly “smoothers” maerl beds seascape and thereby reduces spatial complexity 22 . It therefore strongly modifies the composition of associated benthic fauna community with lower diversity, abundances, and biomass found in dredged compared to unfished areas 19,23,24 . Dredging-induced structural and biological changes of maerl beds are likely affecting the many important ecosystem functions displayed by this habitat in term of sediment budget, organic matter processing and therefore (“blue”) carbon storage capacity 25 .…”

Section: Introductionmentioning

confidence: 99%

Declining maerl vitality and habitat complexity across a dredging gradient: Insights from in situ sediment profile imagery (SPI)

Bernard

Romero-Ramirez

Tauran

et al. 2019

Sci Rep

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Maerl beds form complex biogenic benthic habitats, characterized by high productivity as well as diverse biological communities. Disturbances associated with extraction and/or fishing activities using mobile bottom-contacting gears such as clam-dredges induce the most severe and long-term effects on these fragile habitats. We here investigated the effects of dredge-fishing on maerl in the bay of Brest (France). We quantified maerl beds structure and vitality across a fine scale quantified dredging intensity gradient through the acquisition of in-situ images of beds cross-section using Sediment Profile Imaging system (SPI). Declines in the proxies of maerl vitality and habitat complexity were measured across the gradient, and were associated with significant changes in the vertical distribution of live and dead maerl as well as of interstitial space. Fishing with dredges caused maerl mortality, substratum compaction, and decreasing habitat complexity. SPI imaging techniques also allowed for an assessment of changes in spatial heterogeneity that dredging created on several aspects of the structure and vitality of maerl beds. It suggests that direct and indirect disturbances induced by dredging are not acting at the same spatial scale, and can thereby differentially affect the ecosystem functions linked to vitality and habitat complexity.

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Section: Introductionmentioning

confidence: 99%

Declining maerl vitality and habitat complexity across a dredging gradient: Insights from in situ sediment profile imagery (SPI)

Bernard

Romero-Ramirez

Tauran

et al. 2019

Sci Rep

Self Cite

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“…In these difficult‐to‐access aquatic environments where visibility can be limited, sound is often a principle means of animal communication, and this acoustic communication presents an opportunity for researchers to conduct long‐term, high‐resolution acoustic monitoring (Jansson, ; Luczkovich, Mann, & Rountree, ). Thus far, almost all underwater acoustic studies that aim to evaluate biological diversity or habitat condition have focused on marine habitats (Coquereau, Lossent, Grall, & Chauvaud, ; Freeman et al., ; Harris, Shears, & Radford, ; Miksis‐Olds, ; Parks, Miksis‐Olds, & Denes, ; cf. Desjonquères et al., ).…”

Section: Introductionmentioning

confidence: 99%

Acoustic monitoring reveals diversity and surprising dynamics in tropical freshwater soundscapes

et al. 2018

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Freshwater systems are globally threatened and in need of enhanced monitoring and assessment. We applied soundscape recording and analysis—which presents an opportunity for long‐term, high‐resolution animal community monitoring and assessment—to a freshwater context to better understand the acoustic diversity and dynamics of these systems. We recorded the aquatic soundscape of a Neotropical freshwater swamp in Costa Rica for 23 days in January and February 2015 during the dry season. We classified biological sound types in these recordings and developed measurements of richness and occupancy based on this classification. We also calculated six complementary acoustic indices to assess soundscape diversity and daily and longer‐term soundscape dynamics, and we examined correlations between these acoustic indices and sound type metrics. We found rich soundscapes in which biological sounds were almost always present, and we classified 18 sound types that we attribute to aquatic insects. These sound types showed distinct daily patterns and exhibited temporal and spectral acoustic niche partitioning. Sound type richness was most correlated with the number of peaks index (correlation = .36; p < .001), while sound type occupancy was most correlated with the Bioacoustic Index (correlation = .92; p < .001). In contrast to generally high levels of acoustic activity, there were brief (approximately 1 hr), unexpected quiet periods around dawn and dusk. This study represents an early attempt to comprehensively describe tropical freshwater soundscapes in a systematic and quantitative manner. We demonstrate that sound type classification and the quantification of acoustic occupancy capture aspects of soundscape diversity and dynamics that are complementary to those assessed by acoustic indices. Our analyses reveal that the soundscapes of this tropical wetland were diverse and exhibited daily dynamics that differed from those found in other ecosystems.

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“…The Sonic Kayak system could be used to record samples of underwater sounds over both dead and alive maerl beds to assist with assessments of biodiversity and future management. A similar approach has been utilised in other northeastern Atlantic maerl beds, where acoustic recordings were used to compare the ecosystem health of areas with different levels of fishing activity (Coquereau et al, 2017). Disadvantages of this system for research use include the necessity to stop paddling for recording data due to the paddle noise, the unlikeliness of gathering data overnight and potentially dawn and dusk where biological noise is greatest (Radford 28 et al, 2008a;Radford et al, 2008b;Ghazali et al, 2013;Ricci et al, 2017), and the possibility for limiting weather conditions.…”

Section: Applications For Underwater Sound Researchmentioning

confidence: 99%

Sonic Kayaks: Environmental monitoring and experimental music by citizens

Griffiths

Kemp

Matthews³

et al. 2017

Preprint

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The Sonic Kayak is a musical instrument with which to investigate nature, developed during open hacklab events. Kayaks rigged with underwater environmental sensors allow paddlers to hear real-time water temperature sonifications and underwater sounds, generating live music from the marine world. Sensor data is also logged every second with GPS, time and date, allowing fine scale mapping of water temperatures and underwater noise that was previously unattainable using standard research equipment. The system provides the paddler with an extra dimension of senses with which to explore the underwater climate, while enabling citizens to gather data for scientific research. The system can be used as a citizen-science 1 . CC-BY 4.0 International license It is made available under a (which was not peer-reviewed) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity.The copyright holder for this preprint . http://dx.doi.org/10.1101/167833 doi: bioRxiv preprint first posted online data-collection device, research equipment for professional scientists, or a sound-art installation in its own right, and has been implemented in a public setting at the

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Marine soundscape shaped by fishing activity

Cited by 27 publications

References 18 publications

Declining maerl vitality and habitat complexity across a dredging gradient: Insights from in situ sediment profile imagery (SPI)

Declining maerl vitality and habitat complexity across a dredging gradient: Insights from in situ sediment profile imagery (SPI)

Acoustic monitoring reveals diversity and surprising dynamics in tropical freshwater soundscapes

Sonic Kayaks: Environmental monitoring and experimental music by citizens

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