Ichthyoplankton Associated to the Frontal Regions of the Southwestern Atlantic

Eduardo, M.; Ehrlich, Martin; Muelbert, Jose H; Pájaro, Marcelo; Bruno, Daniel Osvaldo; Machinandiarena, Laura; Cadaveira, Mariana

doi:10.1007/978-3-319-77869-3_11

Cited by 9 publications

(9 citation statements)

References 74 publications

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“…The thin dotted-black line represents the limit of the Argentine and Magellanic Provinces based on Balech and Erlich [27]. Dotted red and light blue lines represent the currents, and colorful lines correspond to the fronts in the region (yellow: South Brazil upwelling, orange: temperate estuarine fronts; pink: tidal fronts, green: Patagonian current front, blue: shelf-break front) in accordance with Acha et al [21,22]. …”

Section: Methodssupporting

confidence: 67%

“…The two abundance hot spots of hydromedusae identified in our study (the Río de la Plata Estuary and El Rincón region) include two large estuarine fronts of particular hydrographic and topographic features within a zone defined by high biological production [21,22]. Considering the abundance patterns and the assemblages reported by the multivariate analyses, the covered temperate estuaries seem to be particularly proper for the development of L .…”

Section: Discussionmentioning

confidence: 83%

“…The proliferation of L . tetraphylla at both estuaries may be boosted by the high productivity of the areas [21,22,26] and also promoted by the traits and plasticity of the species. It adapts to a wide range of environmental variables, such as salinity and temperature [39,42], and can take advantage of food availability due to its high predation rates on a diverse food spectrum (e.g., copepods, fish eggs and larvae, chaetognaths) [47–49].…”

Section: Discussionmentioning

confidence: 99%

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Macroscale abundance patterns of hydromedusae in the temperate Southwestern Atlantic (27°–56° S)

et al. 2019

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Gelatinous organisms are crucial components of marine ecosystems and some species imply social and economic consequences. However, certain geographic areas, such as the temperate Southwestern Atlantic (SWA, 27° - 56° S), remain understudied in terms of jellyfish ecological data. We analyzed 3,727 plankton samples collected along ~6.7 million km 2 over a 31-year period (1983–2014) to determine the occurrence, abundance, and diversity patterns of hydromedusae in the SWA. Analyses were made at both community and species levels. Two abundance hot spots of hydromedusae were identified, where values up to 2,480 ind. m -3 were recorded between 2003 and 2014. Liriope tetraphylla and Obelia spp. were the main responsible for recurrent peaks. Diversity indexes were in the range of those published for temperate areas worldwide, and some coastal zones showed values that can be considered moderate to high for a temperate neritic region. The community analysis yielded 10 groups following previously determined biogeographic schemes throughout the study area. This work enhances the knowledge of hydromedusae in the SWA and provides essential information about the current global warming context and the gelatinous zooplankton data necessity.

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Section: Methodssupporting

confidence: 67%

Section: Discussionmentioning

confidence: 83%

Section: Discussionmentioning

confidence: 99%

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Macroscale abundance patterns of hydromedusae in the temperate Southwestern Atlantic (27°–56° S)

et al. 2019

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“…In particular, the area of the Argentine shelf called El Rincón extends from 38.5 • S to approximately 42 • S (Figure 1) and is especially wide at some areas, that is, ∼300 km (Lucas et al, 2005). El Rincón ecosystem, with its middle-shelf front (located at ∼100 m isobaths, Romero et al, 2006), embraces large habitat heterogeneity (Lucas et al, 2005;Palma et al, 2008) characterized by high zooplankton and fish biodiversity (e.g., Marrari et al, 2004;López Cazorla et al, 2014;Acha et al, 2018). For instance, its frontal areas are the main spring reproductive habitats of the northern stock of Argentine anchovy (Engraulis anchoita) (Marrari et al, 2013;Díaz et al, 2018) and other valuable species (e.g., Hoffmeyer et al, 2009;Marrari et al, 2013;Acha et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…El Rincón ecosystem, with its middle-shelf front (located at ∼100 m isobaths, Romero et al, 2006), embraces large habitat heterogeneity (Lucas et al, 2005;Palma et al, 2008) characterized by high zooplankton and fish biodiversity (e.g., Marrari et al, 2004;López Cazorla et al, 2014;Acha et al, 2018). For instance, its frontal areas are the main spring reproductive habitats of the northern stock of Argentine anchovy (Engraulis anchoita) (Marrari et al, 2013;Díaz et al, 2018) and other valuable species (e.g., Hoffmeyer et al, 2009;Marrari et al, 2013;Acha et al, 2018). So far, there has been only one study on the planktonic microorganisms of El Rincón (Negri et al, 2013) and few of the adjacent areas (Silva et al, 2009;Segura et al, 2013), and they are mainly focused on the smallest cell sized fractions.…”

Section: Introductionmentioning

confidence: 99%

Plankton Multiproxy Analyses in the Northern Patagonian Shelf, Argentina: Community Structure, Phycotoxins, and Characterization of Toxic Alexandrium Strains

et al. 2018

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The extensive Argentine continental shelf supports high plankton productivity and fish catches. In particular, El Rincón coastal area and the adjacent shelf fronts (38.5-42 • S, 58.5-62 • W) comprise diverse habitats and hold species of economic and ecological value. So far, studies of the microbial community present at the base of the food web remain scarce. Here, we describe the late winter plankton (5-200 µm) structure in terms of abundance, biomass, species composition, functional groups, and phycotoxin profiles in surface waters of El Rincón in September 2015. Diatoms are the most abundant and the largest contributors to carbon biomass at most stations. They dominated the coastal and inner-shelf (depths <50 m), while dinoflagellates and small flagellates (<15 µm) dominated offshore at the middle-shelf waters (depth ∼100 m). In addition, large (>20 µm) heterotrophic protists such as various ciliates and dinoflagellates species were more abundant offshore. Scanning of phycotoxins disclosed that paralytic shellfish poisoning (PSP) toxins were dominated by gonyautoxins-1/4 (GTX1/4), whereas lipophilic toxins were detected in low abundance, for example, domoic acid (DA). However, a bloom of Pseudo-nitzschia spp. (up to 3.6 × 10 5 cells L −1) was detected at inner-shelf stations. Pectenotoxin-2 (PTX-2) and 13-desmethyl spirolide C (SPX-1) were the most abundant in the field. The PTX-2 cooccurred with Dinophysis spp., mainly D. tripos, while SPX-1 dominated at middle-shelf stations, where cells of Alexandrium catenella (1 strain) and A. ostenfeldii (3 strains) were isolated. The quantitative PSP profiles of the Alexandrium strains differed significantly from the in situ profiles. Moreover, the three A. ostenfeldii strains produced PSP and additionally, five novel spirolides. Phylogenetic analyses of these newly isolated strains

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Effects of Estuarine Environmental Heterogeneity on the Habitat of Gobiidea Species Larvae

Zhai

et al. 2023

Mar Coast Fish

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In aquatic ecosystems around the world, gobies comprise one of the most diverse groups of fishes in estuaries. The Yangtze River estuary, the biggest estuary in the western Pacific, is a major habitat for larval gobies, with the peak spawning and breeding season occurring during late spring and summer. To investigate the adaptation mechanism of larval gobies to environmental factors, three models (a global generalized linear model, a generalized additive model, and a geographically weighted Poisson regression) were used to simulate and forecast the major habitat distributions of larval gobies based on the survey data from 2018 to 2020. Six species of gobies were studied: Rhinogobius giurinu, Odontamblyopus rubicundus, Tridentiger barbatus, Parachaeturichthys polynema, Tridentiger trigonocephalus, and Trypauchen vagina. The habitats for brackish species T. barbatus were mainly in freshwater (where, using the practical salinity scale, salinity is 0-1) of the south branch, whereas the marine species P. polynema was mainly caught in oligohaline waters (where salinity is 1-5) of the north branch. The other euryhaline species were near the exit of the north branch or dispersed throughout the surveyed region. Year, season, salinity, and sample location had significant effects (P < 0.001) on determining the habitat distributions of larval gobies. The geographically weighted Poisson regression identified that the temperature, depth, distance from the coast, and chlorophyll a had a significant effect (P < 0.001) on the local distribution of habitats. This work supplements information about the distribution of major habitats and their interactions with the environment for the ecologically important species of goby in the Yangtze estuary during the larval stage, and the conclusions provide a basis for the management of aquatic ecosystems and biological habitats.

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Ichthyoplankton Associated to the Frontal Regions of the Southwestern Atlantic

Cited by 9 publications

References 74 publications

Macroscale abundance patterns of hydromedusae in the temperate Southwestern Atlantic (27°–56° S)

Macroscale abundance patterns of hydromedusae in the temperate Southwestern Atlantic (27°–56° S)

Plankton Multiproxy Analyses in the Northern Patagonian Shelf, Argentina: Community Structure, Phycotoxins, and Characterization of Toxic Alexandrium Strains

Effects of Estuarine Environmental Heterogeneity on the Habitat of Gobiidea Species Larvae

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