Seafloor litter sorting in different domains of Cap de Creus continental shelf and submarine canyon (NW Mediterranean Sea)

Domínguez-Carrió, Carlos; Sánchez-Vidal, Anna; Estournel, Claude; Corbera, Guillem; Riera, Joan Lluís; Orejas, Covadonga; Canals, Miquel; Gili, Josep-Marı́a

doi:10.1016/j.marpolbul.2020.111744

Cited by 23 publications

(20 citation statements)

References 77 publications

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“…Whereas non-shore-connected canyons can host active turbidity currents (Kudrass et al, 1998;Zhong & Peng, 2021), the efficiency of land-to-ocean material transfer and burial should be higher for shore-connected canyons. For example, Mediterranean shore-connected canyons efficiently transport litter and contaminants onto the basin floor (Dominguez-Carrió et al, 2020;Pierdomenico et al, 2019). Hence, we expect major terrestrially derived litter concentrations and organic carbon burial on the ocean floor where spatial hotspots of shore-connected canyons coincide with litter-producing urban areas and/or areas with high primary production and erosion rates (Hilton & West, 2020).…”

Section: Discussionmentioning

confidence: 98%

Where and Why Do Submarine Canyons Remain Connected to the Shore During Sea-level Rise? - Insights from Global Topographic Analysis and Bayesian Regression

Bernhardt

Schwanghart

2020

Preprint

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Submarine canyons are prime conduits for sediment-laden flows that link terrestrial sediment sources with deep-marine depocenters. The efficiency at which canyons route sediments is at least partly controlled by how far they extend into the shelf. If the distance between the canyon head and the shore is short, terrestrial sediment, associated pollutants, and organic carbon can be efficiently delivered to the deep ocean (Azaroff et al.

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Section: Discussionmentioning

confidence: 98%

Where and Why Do Submarine Canyons Remain Connected to the Shore During Sea-level Rise? - Insights from Global Topographic Analysis and Bayesian Regression

Bernhardt

Schwanghart

2020

Preprint

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“…We note here that both seep sites were outside the main axes of the two major canyons. Since canyons, including BC and NC, are known to accumulate, concentrate and transport debris and litter (Van den Beld et al, 2017;Dominguez-Carrió et al, 2020;S. W. Ross, unpubl.…”

Section: Marine Litter At the Bc And Nc Sitesmentioning

confidence: 99%

Distribution of Megabenthic Communities Under Contrasting Settings in Deep-Sea Cold Seeps Near Northwest Atlantic Canyons

et al. 2021

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Cold seeps support fragile deep-sea communities of high biodiversity and are often found in areas with high commercial interest. Protecting them from encroaching human impacts (bottom trawling, oil and gas exploitation, climate change) requires an advanced understanding of the drivers shaping their spatial distribution and biodiversity. Based on the analysis of 2,075 high-quality images from six remotely operated vehicle dives, we examined cold seep megabenthic community composition, richness, density, and biodiversity at a relatively shallow (∼400 m water depth) site near Baltimore Canyon (BC) and a much deeper site (∼1,500 m) near Norfolk Canyon (NC), in the northwest Atlantic. We found sharp differences in the megabenthic composition between the sites, which were driven mostly by bathymetric gradients. At both BC and NC there were significant differences in megabenthic composition across habitats. Hard habitats in and around cold seeps had significantly higher values of species richness, density, and biodiversity than soft habitats. Depth and habitat complexity were the leading environmental variables driving megabenthic variability. The presence of microbial mats and gas bubbling sites had a statistically significant contribution to explaining megabenthic variability mainly in the shallower BC and less in the deeper NC areas examined; drivers behind this discrepancy could be related to differences between BC and NC in terms of chemical compound fluxes and megafaunal life history characteristics. Our surveys revealed marine litter, primarily from commercial fisheries. This study highlights the importance of habitat complexity for the proliferation of highly diverse cold-seep ecosystems and underscores the importance of discovery science to inform spatial management of human activities in the deep and open ocean.

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“…About 70% to 80% of marine litter originates from land-based sources [23], especially in areas with many recreational activities [24] and a high non-resident population [25]. Nevertheless, there is a predominance of sea-based sources in some areas with a high presence of abandoned, lost, or discarded fishing gear (ALDFG) [26,27]. Veiga et al [22] recognized the complexity involved in identifying the concrete sources of marine litter.…”

Section: Introductionmentioning

confidence: 99%

“…Determining the abundance, spatial distribution and composition of marine litter requires its removal from beaches and seas or recording it using video or photography from autonomous underwater vehicles (AUVs), human-occupied vehicles (HOVs), towed underwater cameras (TUCs), or remotely operated vehicles (ROVs) [29]. Some of the most recent studies using ROVs include those by Consoli et al [30,31], Botero et al [32], Costanzo et al [33], Dominguez-Carrió et al [27], Enrichetti et al [34], Garofalo et al [35], Mecho et al [36], and Pierdomenico et al [37].…”

Section: Introductionmentioning

confidence: 99%

“…The concentration of marine litter depends on a number of factors including distance from the coastal area, population density of the coastal area, coastal physiography, presence of rivers, sea depth, and oceanographic conditions such as sea currents and topographic characteristics of the seafloor [29,46,[58][59][60]. Deep canyons, sometimes far from the coast, have been found to represent important sinks for marine litter [27,37]. The association of topographic (bathymetric profile and slope) and hydrodynamic components (surface and bottom currents) is also a pivotal factor that influences the dispersion or accumulation of marine macro-litter [61].…”

Section: Introductionmentioning

confidence: 99%

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Abundance and Composition of Marine Litter on the Seafloor of the Gulf of Sant Jordi (Western Mediterranean Sea)

Saladié

2021

Environments

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This article analyzes the abundance and composition of marine litter in the Gulf of Sant Jordi (Catalonia, Spain). Marine litter was removed from the sea by a fishing trawler operating from the port of L’Ametlla de Mar; 56 hauls were performed between July and September 2018. The marine litter was classified following UNEP/IOC Guidelines on Survey and Monitoring of Marine Litter and EU MSFD Technical Group on Marine Litter Joint List, with a total of 2691 items collected and an average number by haul of 48 (SD 28.24). The density was 130 items km−2 but with significant differences according to trawling depth: 192 items km−2 (≤100 m) and 71.5 items km−2 (>100 m). As expected, plastic was the most commonly found material, comprising almost 80% of the total. The relative presence of plastics declined as trawling depth increased. An alarmingly high amount of sanitary waste was found. Further studies are necessary to compare summer results with those of smaller seasonal populations and to analyze what happens to sanitary waste.

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Seafloor litter sorting in different domains of Cap de Creus continental shelf and submarine canyon (NW Mediterranean Sea)

Cited by 23 publications

References 77 publications

Where and Why Do Submarine Canyons Remain Connected to the Shore During Sea-level Rise? - Insights from Global Topographic Analysis and Bayesian Regression

Where and Why Do Submarine Canyons Remain Connected to the Shore During Sea-level Rise? - Insights from Global Topographic Analysis and Bayesian Regression

Distribution of Megabenthic Communities Under Contrasting Settings in Deep-Sea Cold Seeps Near Northwest Atlantic Canyons

Abundance and Composition of Marine Litter on the Seafloor of the Gulf of Sant Jordi (Western Mediterranean Sea)

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