Predatory marine bivalves: A review

Morton, Brian; Machado, Fabrizio Marcondes

doi:10.1016/bs.amb.2019.10.001

Cited by 17 publications

(4 citation statements)

References 112 publications

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“…One theory states that prey can be more easily detected in the deep sea compared to shallow water environments, as "flow in the benthic boundary layer is slow and thus chemical gradients and pressure waves produced by prey should be more persistent and provide better information for prey location" (Thistle, 2003). Facultative predation is even known for specific deep-sea species of, for example, sponges (Vacelet, 2006;Godefroy et al, 2019;Martini et al, 2020b), and bivalves (Morton, 2016;Morton and Machado, 2019), suggesting feeding modes may be unusual, highly plastic and require more study. A stable isotope-based assessment for the study area is ongoing and will provide more clarification of the species' feeding modes and trophic levels.…”

Section: Discussion Trait Modalities Composition Across the Deep-sea Cblmentioning

confidence: 99%

Functional Pattern of Benthic Epifauna in the Chukchi Borderland, Arctic Deep Sea

et al. 2021

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Assessment of Arctic deep-sea ecosystem functioning is currently an urgent task considering that ongoing sea-ice reduction opens opportunities for resource exploitation of yet understudied deep-sea regions. We used Biological Trait Analysis to evaluate ecosystem functioning and test if common paradigms for deep-sea fauna apply to benthic epifauna of the deep-sea Arctic Chukchi Borderland (CBL). We also investigated the influence of environmental factors on the functional structure of the epifauna. The analysis was performed for 106 taxa collected with a beam trawl and a Remotely Operated Vehicle from 486 to 2610 m depth. The most common trait modalities were small-medium size, mobile, benthic direct and lecithotrophic larval development, and predatory feeding, which mostly supports the current view of epifauna in the global deep sea. Functional composition of epifauna differed between two depth strata (486–1059 m and 1882–2610 m), with depth and sediment carbon content explaining most of the functional variability. Proportional abundances of the modalities free-living, swimming, suspension feeders, opportunists/scavengers, internal fertilization and globulose were higher at deep stations. Functional redundancy (FR) was also higher there compared to the mid-depth stations, suggesting adaptation of fauna to the more homogeneous deep environment by fewer and shared traits. Mid-depth stations represented higher functional variability in terms of both trait modality composition and functional diversity, indicating more variable resource use in the more heterogeneous habitat. Food input correlated positively with the proportional abundance of the modalities tube-dwelling, sessile and deposit feeding. Areas with drop stones were associated with higher proportional abundance of the modalities attached, upright, and predators. Comparatively low FR may render the heterogeneous mid-depth area of the CBL vulnerable to disturbance through the risk of loss of functions. Across the study area, high occurrence of taxa with low dispersal ability among adult and larval life stages may prevent rapid adaptation to changes, reduce ability to recolonize and escape perturbation.

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Section: Discussion Trait Modalities Composition Across the Deep-sea Cblmentioning

confidence: 99%

Functional Pattern of Benthic Epifauna in the Chukchi Borderland, Arctic Deep Sea

et al. 2021

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“…Finally, other noteworthy bivalves are the selective carnivores Cuspidaria spp. and Tropidomya abbreviate (Forbes, 1843), here reported as suspension feeders, which capture hyperbenthic plankton through their inhalant siphon (Morton and Machado, 2019;Reid and Reid, 1974).…”

Section: Discussionmentioning

confidence: 99%

Bathymetrical and temporal variations in soft-bottom molluscan assemblages in the coastal area facing the Sarno River mouth (Mediterranean Sea, Gulf of Naples)

Donnarumma

Sandulli

Appolloni

et al. 2020

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Molluscan assemblage of coastal area facing the very polluted Sarno River estuary to offshore (Gulf of Naples, Italy) was studied, focusing on temporal and depth-related distribution of species diversity, quali-quantitative composition and trophic guilds structure. A total of 9 stations, at depths ranging between 7 and 95m, were sampled in triplicate by means of a 0.17 m 2 Van Veen grab in four sampling occasions (2 seasons, winter and summer, during 2 years, 2015 and 2016). A total of 1,744 individuals, belonging to 78 species and 3 classes (Bivalvia, Gastropoda and Scaphopoda), was recorded. Bivalves, followed by gastropods, qualitatively and quantitatively dominated the mollusc assemblages and both these taxonomic groups showed the highest values in the shallower stations down to about 25 m depth. In the deeper stations, only the bivalve taxon was dominant, even though exhibiting a much lower species richness and abundance. On the overall, the molluscan species were ascribed to 6 feeding guilds: Suspension and deposit feeders were the dominant trophic groups, occurring at all stations along the bathymetrical gradient, while predators, detritus feeders, ecto-parasites and scavengers were poorly represented and mainly occurred in the shallowest stations. The mollusc composition and distribution pattern along the bathymetrical gradient over time show signs of structural stability that might be mainly due to the continuous supply of organic matter from the river mouth expanding to all area. These results are of primary importance for filling the knowledge gaps on benthic biodiversity over a still poorly known and very fragile coastal area under continuous anthropogenic pressures mainly through the runoff of a very polluted river.

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“…The heterobranch genus Acteocina features both species with planktotrophic and non-planktotrophic larvae, the difference in protoconch morphology being only a small difference in the number of whorls (Mikkelsen and Mikkelsen 1984). No larva of any septibranch has been described (Morton and Machado 2019). Clues from other anomalodesmatan bivalves suggest that both brooded embryos and short non-feeding pelagic larvae are possible, but brooded larvae were never reported in the large array of septibranchs examined anatomically (Allen and Turner 1974;Allen and Morgan 1981) so that a short non-feeding planktonic larva is the most probable condition in deep-sea septibranchs.…”

Section: Larval Developmentmentioning

confidence: 98%

The dispersal capacity of Mollusca—a test on the South Azorean Seamount Chain

Herrera,

Hoffman,

Freiwald

et al. 2023

Mar. Biodivers.

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This study investigates the molluscan fauna of the South Azorean Seamount Chain (SASC), which comprises several seamounts culminating in 300–1600 m depth, separated by distances less than 200 km. Material was collected mainly by dredging and comprises mostly empty shells. A total of over 111,000 shells representing at least 439 species (409 identified) was collected. Larval development was inferred from protoconch morphology, and the assemblage comprises species with planktotrophic larvae, with non-feeding planktonic larva, and with lecithotrophic larvae with direct development. The direct developers are more prevalent among species endemic to the SASC in the upper bathyal part (300–800 m) of the seamounts, whereas most planktotrophic species are shared with the Lusitanian seamounts and/or the European mainland. Nevertheless, there are notable exceptions to this trend, where species with non-planktotrophic larvae are also widespread, and a large proportion of the species with non-feeding planktonic larvae are shared with Eastern and/or Western Atlantic. Level of endemism of Mollusca is high within the SASC (22.5% overall, 35.8% considering only the interval < 800 m) and even higher (32.6% overall) when considering together the SASC and the Azores. The generic composition and large set of overlapping fauna suggest a strong relation to the temperate Eastern Atlantic, whereas only 19% of the species are shared with the Western Atlantic.

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Predatory marine bivalves: A review

Cited by 17 publications

References 112 publications

Functional Pattern of Benthic Epifauna in the Chukchi Borderland, Arctic Deep Sea

Functional Pattern of Benthic Epifauna in the Chukchi Borderland, Arctic Deep Sea

Bathymetrical and temporal variations in soft-bottom molluscan assemblages in the coastal area facing the Sarno River mouth (Mediterranean Sea, Gulf of Naples)

The dispersal capacity of Mollusca—a test on the South Azorean Seamount Chain

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