Zooplankton electron transport system activity and biomass in the western Ross Sea (Antarctica) during austral summer 2014

Minutoli, Roberta; Brugnano, Cinzia; Granata, Antonia; Zagami, Giacomo; Guglielmo, Letterio

doi:10.1007/s00300-016-2043-6

Cited by 4 publications

(3 citation statements)

References 72 publications

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“…The A4 area sub-system was different from the other areas showing a completely different arrangement of chemicals and biological variables (Bolinesi et al, 2020). Zooplankton is the most important factor in regulating food web dynamics and ecological interactions in the Ross Sea (Hopkins, 1987;Saino and Guglielmo, 2000;Ainley et al, 2010;Ainley et al, 2015;Minutoli et al, 2017;Smith et al, 2017;Kiko et al, 2020) with gelatinous zooplankton, comprising jellyfish, ctenophores and chordate tunicates (Pagès, 1997), showing a ubiquitous behavior (Richardson et al, 2009;Schaub et al, 2018;Verhaegen et al, 2021). Nonetheless, zooplankton abundance varies greatly over the continental shelf and its assemblages, beyond copepods, are mainly composed by fish larvae, euphausiids, hyperiid and gammarid amphipods, pteropods, chaetognaths, and ostracods (Guglielmo et al, 1990;Guglielmo et al, 1992;Hecq et al, 1992;Hunt et al, 2008;Stevens et al, 2015;Smith et al, 2017;Granata et al, 2022;Kim et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Vertical structure characterization of acoustically detected zooplankton aggregation: a case study from the Ross Sea

Barra,

Guglielmo,

Bonanno

et al. 2023

Front. Mar. Sci.

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Acoustic data were collected by means of Simrad EK60 scientific echosounder on board the research vessel “Italica” in the Ross Sea during the 2016/2017 austral summer as part of the P-Rose and CELEBeR projects, within the framework of the Italian National Research Program in Antarctica (PNRA). Sampling activities also involved the collection of vertical hydrological profiles using the SBE 9/11plus oceanographic probe. Acoustic data were processed to extract three specific scattering structures linked to Euphausia superba, Euphausia crystallorophias and the so called Sound-Scattering Layers (SSLs; continuous and low-density acoustic structures constituted by different taxa). Four different sectors of the study area were considered: two southern coastal sectors (between the Drygalski Ice Tongue and Coulman Island), a northern sector (~30 nmi East of Cape Hallett) and an offshore one spanning about 2 degrees of latitude from Coulman Island south to the Drygalski Ice Tongue. The vertical structure of each group in each area was then analyzed in relation to the observed environmental conditions. Obtained results highlighted the presence of different vertical structures (both environmental and acoustic) among areas, except for the two southern coastal sectors that were found similar. GAM modelling permitted to evidence specific relationships between the environmental factors and the vertical distribution of the considered acoustic groups, letting to hypothesize the presence of trophic relationships and differences in SSL species composition among areas. The advantages of acoustic techniques to implement opportunistic monitoring strategies in endangered ecosystems are also discussed.

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Section: Discussionmentioning

confidence: 99%

Vertical structure characterization of acoustically detected zooplankton aggregation: a case study from the Ross Sea

Barra,

Guglielmo,

Bonanno

et al. 2023

Front. Mar. Sci.

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“…The number of metazoan zooplankton was obtained by counting under a microscope. The length, width, and thickness were measured according to the approximate geometric figure, and the biological volume was calculated by the quadrature formula to convert the biomass [32][33][34].…”

Section: Biomass Conversion Of Metazoan Zooplanktonmentioning

confidence: 99%

Studying the Metazoan Zooplankton Community Characteristics and Evaluating the Water Quality Based on the Ecological and Functional Zones in Gaoyou Lake

Guo,

Mo,

et al. 2023

Water

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To study the metazoan zooplankton community structure and water quality, we investigated the amount of metazoan zooplankton and the water quality in Gaoyou Lake from January to December 2022. Furthermore, we also evaluated the multi-index and nutritional status of Gaoyou Lake using the comprehensive nutritional status index of water quality, dominant population composition of the metazoan zooplankton, B/T index, and Shannon–Weaver diversity index based on the situation of each ecological and functional zone. The results indicated that the metazoan zooplankton of Gaoyou Lake included 21 families, 31 genera, and 63 species. The rotifers had 8 families, 16 genera, and 34 species, accounting for 53.9% of all species. The cladocerans had 6 families, 7 genera, and 16 species, which accounted for 25.4% of all species. The copepods had 7 families, 8 genera, and 13 species, that accounted for 20.7% of all species. The density and species of small metazoan zooplankton (rotifers) had a higher proportion than large metazoan zooplankton (crustaceans). The average annual metazoan zooplankton density was 1595.7 ind./L, the average annual biomass was 4.31 mg/L, the average annual total nitrogen (TN) was 1.101 mg/L, and the average annual total phosphorus (TP) was 0.082 mg/L. The TN and TP of the Gaoyou Lake were over the standard. The comprehensive nutritional status indices of the water quality in the entire lake and the ecological and functional areas were consistent with the metazoan zooplankton evaluation results, which determined that Gaoyou Lake showed mild eutrophication.

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“…This led to a variety of specific physiological and developmental strategies. For example, some pelagic herbivorous copepods synchronize their gonadal and life-stage with phytoplankton blooms to gain the best from the extremely short Antarctic summer months (Hagen and Schnack-Schiel 1996;Minutoli et al 2017). Other species are intimately linked to the sea ice, which provides an important habitat for small grazers in general but especially copepods (Loots et al 2009;Pusceddu et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Distributional records of Ross Sea (Antarctica) planktic Copepoda from bibliographic data and samples curated at the Italian National Antarctic Museum (MNA): checklist of species collected in the Ross Sea sector from 1987 to 1995

Bonello¹,

Grillo²,

Cecchetto³

et al. 2020

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Distributional data on planktic copepods (Crustacea, Copepoda) collected in the framework of the IIIrd, Vth, and Xth Expeditions of the Italian National Antarctic Program (PNRA) to the Ross Sea sector from 1987 to 1995 are here provided. Sampling was performed with BIONESS and WP2 nets at 94 sampling stations at depths of 0–1,000 m, with a special focus on the Terra Nova Bay area. Altogether, this dataset comprises 6,027 distributional records, out of which 5,306 were obtained by digitizing original data reports and 721 are based on physical museum vouchers curated by the Italian National Antarctic Museum (MNA, Section of Genoa). The MNA samples include 8,224 individual specimens that were identified to the lowest possible taxonomic level. They belong to four orders, 25 families, 52 genera, and 82 morphological units (out of which 17 could be determined at the genus level only). A variety of environmental data were also recorded at each of the sampling stations, and we report original abundances (ind/m3) to enable future species distribution modelling. From a biogeographic point of view, the distributional data here reported represented new records for the Global Biogeographic Information Facility (GBIF) registry. In particular, 62% of the total number of species are new records for the Ross Sea sector and another 28% new records for the Antarctic region.

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Zooplankton electron transport system activity and biomass in the western Ross Sea (Antarctica) during austral summer 2014

Cited by 4 publications

References 72 publications

Vertical structure characterization of acoustically detected zooplankton aggregation: a case study from the Ross Sea

Vertical structure characterization of acoustically detected zooplankton aggregation: a case study from the Ross Sea

Studying the Metazoan Zooplankton Community Characteristics and Evaluating the Water Quality Based on the Ecological and Functional Zones in Gaoyou Lake

Distributional records of Ross Sea (Antarctica) planktic Copepoda from bibliographic data and samples curated at the Italian National Antarctic Museum (MNA): checklist of species collected in the Ross Sea sector from 1987 to 1995

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