Seabed images versus corer sampling: a comparison of two quantitative approaches for the analysis of marine benthic communities in the southern Weddell Sea (Southern Ocean)

Pineda-Metz, Santiago E A; Gerdes, Dieter

doi:10.1007/s00300-017-2211-3

Cited by 52 publications

(9 citation statements)

References 27 publications

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“…Macrofauna assemblages of the investigated soft sediments were dominated by polychaetes. This finding matches well with those of previous studies from Southern Ocean shelf areas (Arntz et al 1994, Gutt 2007, Glover et al 2008, Pineda-Metz & Gerdes 2018. On the basis of our findings, we assumed that the limited input and availability of fresh material and the amount of organic matter at the seafloor were limiting factors for macrofauna abundances.…”

Section: Meiofauna Communities Reflect Ice-cover Categories Better Th...supporting

confidence: 93%

“…The MUC is a useful sampling gear for soft sediments, but using it might underestimate large and comparatively rare benthic macrofauna because of the small sampling area of the cores. These problems might be mitigated by higher deployment numbers, analysis of more cores, or use in combination with other sampling gear (Piepenburg & von Juterzenka 1994, Pineda-Metz & Gerdes 2018. Note that we used cores with different sampling surfaces (MUC6: 25.5 cm 2 ; MUC10: 69.4 cm 2 ; see Table 1 for stations).…”

Section: Meiofauna Communities Reflect Ice-cover Categories Better Th...mentioning

confidence: 99%

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Sea-ice-related environmental drivers affect meiofauna and macrofauna communities differently at large scales (Southern Ocean, Antarctic)

Säring

Veit-Köhler

Seifert

et al. 2022

Mar. Ecol. Prog. Ser.

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The structure and drivers of Southern Ocean meiofauna and macrofauna were investigated together in one extensive study. From the tip of the Antarctic Peninsula to the southeastern Weddell Sea, we classified the investigated stations into 5 categories according to their summer sea-ice cover: (I) none (Drake Passage), (II) irregular (Bransfield Strait), (III) seasonal (northwestern Weddell Sea), (IV) high (South Filchner Trough), and (V) constant (North Filchner Trough). The categories differed significantly in primary-production-related characteristics in the water column and food availability at the seafloor. Almost all ice-cover categories differed significantly in meiofauna communities (32-500 µm, 20 taxa, 585 825 individuals). Fewer regions differed significantly in macrofauna (>500 µm, 19 taxa, 3974 individuals) or the combined meiofauna and macrofauna communities. Environmental drivers explained >66% of the variation among different communities and differed for the faunal size classes: for meiofauna (84.2%), sea-ice cover (1 yr) and availability of fresh food (chlorophyll a [chl a]) were most important, whereas 1 yr ice cover, chl a, and total organic carbon were decisive drivers for macrofauna (66.6%). Grain size, water depth, water-column chl a, long-term ice cover, seafloor temperature, and the carbon/nitrogen ratio influenced communities to a lesser extent. We demonstrated a stronger relationship with sea-ice cover in meiofauna communities than in macrofauna communities, and we recommend including meiofauna in future assessments of the influence of environmental changes on Southern Ocean ecosystems.

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Section: Meiofauna Communities Reflect Ice-cover Categories Better Th...supporting

confidence: 93%

Section: Meiofauna Communities Reflect Ice-cover Categories Better Th...mentioning

confidence: 99%

Sea-ice-related environmental drivers affect meiofauna and macrofauna communities differently at large scales (Southern Ocean, Antarctic)

Säring

Veit-Köhler

Seifert

et al. 2022

Mar. Ecol. Prog. Ser.

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“…A comparative analysis of benthic infauna (collected using multibox corer) and epifauna (obtained from imagery) in the southern Weddell Sea similarly found comparable spatial distribution patterns (Pineda-Metz and Gerdes, 2018), suggesting this pattern may be widespread in the Southern Ocean. The generally strong concordance between macro-infauna and megaepifauna patterns across our entire study area suggests that these elements of the fauna are responding to similar environmental constraints at this scale (e.g., large-scale differences in organic content, benthic production, hydrodynamic conditions).…”

Section: Concordance Of Spatial Patterns In Mega-epifauna and Macro-infauna Benthic Community Compositionmentioning

confidence: 95%

Ross Sea Benthic Ecosystems: Macro- and Mega-faunal Community Patterns From a Multi-environment Survey

et al. 2021

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The Ross Sea, Antarctica, is amongst the least human-impacted marine environments, and the site of the world’s largest Marine Protected Area. We present research on two components of the Ross Sea benthic fauna: mega-epifauna, and macro-infauna, sampled using video and multicore, respectively, on the continental shelf and in previously unsampled habitats on the northern continental slope and abyssal plain. We describe physical habitat characteristics and community composition, in terms of faunal diversity, abundance, and functional traits, and compare similarities within and between habitats. We also examine relationships between faunal distributions and ice cover and productivity, using summaries of satellite-derived data over the decade prior to our sampling. Clear differences in seafloor characteristics and communities were noted between environments. Seafloor substrates were more diverse on the Slope and Abyss, while taxa were generally more diverse on the Shelf. Mega-epifauna were predominantly suspension feeders across the Shelf and Slope, with deposit feeder-grazers found in higher or equal abundances in the Abyss. In contrast, suspension feeders were the least common macro-infaunal feeding type on the Shelf and Slope. Concordance between the mega-epifauna and macro-infauna data suggests that non-destructive video sampling of mega-epifauna can be used to indicate likely composition of macro-infauna, at larger spatial scales, at least. Primary productivity, seabed organic flux, and sea ice concentrations, and their variability over time, were important structuring factors for both community types. This illustrates the importance of better understanding bentho-pelagic coupling and incorporating this in biogeographic and process-distribution models, to enable meaningful predictions of how these ecosystems may be impacted by projected environmental changes. This study has enhanced our understanding of the distributions and functions of seabed habitats and fauna inside and outside the Ross Sea MPA boundaries, expanding the baseline dataset against which the success of the MPA, as well as variability and change in benthic communities can be evaluated longer term.

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“…By keeping the same 26 megapixel camera mounted on the OFOBS as was used on the OFOS, as well as the same illumination sources and deployment methodologies, temporal comparisons of seafloor communities and physical conditions can be made directly between data collected in different years, avoiding inter-comparability problems associated with varying these parameters (Schoening et al, 2020;Jaffe, 2015). As noted in (Pineda-Metz and Gerdes, 2018), fauna analysis of a region is most completely approached by sampling stations with both camera equipment and physical sampling methodologies, such as box, multibox-and multi-corer. During the PS124 expedition a multibox corer (Gerdes, 1990) was also used to sample the surface and infauna megafauna directly, with multicorers also being deployed to allow analysis of the micro and meio-infauna (Hellmer and Holtappels, 2021).…”

Section: Introductionmentioning

confidence: 99%

The COSMUS Expedition: Seafloor Images and acoustic bathymetric data from the PS124 expedition to the southern Weddell Sea, Antarctica

Purser

Hehemann

Boehringer

et al. 2022

Preprint

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Abstract. Between 3rd February and 30th March 2021 the research icebreaker RV Polarstern conducted an extensive multidisciplinary research expedition across the southern Weddell Sea, Antarctica. During the Continental Shelf Multidisciplinary Flux Study (COSMUS) expedition (designated research expedition PS124) the Ocean Floor Observation and Bathymetry System (OFOBS) was deployed 20 times to collect high resolution seafloor image and acoustic data with a 26-megapixel resolution camera, HD (high definition) video camera, forward facing acoustic camera and multibeam side-scan system from heights of between 1.5 and 4.5 m above seafloor. To localise the collected data the OFOBS was equipped with a Posidonia transponder for ultra- short baseline position triangulation, an Inertial Navigation System (INS) and a seafloor tracking Dynamic Velocity Logger (DVL). The 20 deployments were made across contrasting areas of the Weddell Sea, Filchner Trough, Filchner Sill and Filchner Shelf. Here, we present the full image data set collected from across the various deployments, as well as raw side-scan data, and derived high resolution bathymetric maps produced from this acoustic data after the cruise. All images are available from: https://doi.pangaea.de/10.1594/PANGAEA.936205 (Purser et al., 2021b) and https://doi.pangaea.de/10.1594/PANGAEA.932827 (Purser et al., 2021c). Acoustic data for all deployments is also available from PANGAEA, with the raw side scan data available at: https://doi.pangaea.de/10.1594/PANGAEA.939322 (Hehemann et al., 2021b), forward facing acoustic camera data at: https://doi.pangaea.de/10.1594/PANGAEA.939341 (Purser et al., 2021a). Seafloor topographic maps derived from the side scan data are available at: https://doi.pangaea.de/10.1594/PANGAEA.939087 (Hehemann et al., 2021a).

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Seabed images versus corer sampling: a comparison of two quantitative approaches for the analysis of marine benthic communities in the southern Weddell Sea (Southern Ocean)

Cited by 52 publications

References 27 publications

Sea-ice-related environmental drivers affect meiofauna and macrofauna communities differently at large scales (Southern Ocean, Antarctic)

Sea-ice-related environmental drivers affect meiofauna and macrofauna communities differently at large scales (Southern Ocean, Antarctic)

Ross Sea Benthic Ecosystems: Macro- and Mega-faunal Community Patterns From a Multi-environment Survey

The COSMUS Expedition: Seafloor Images and acoustic bathymetric data from the PS124 expedition to the southern Weddell Sea, Antarctica

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