A hyperiid amphipod acts as a trophic link between a scyphozoan medusa and juvenile Chinook Salmon

Weil, Jacob; Duguid, William D. P.; Juanes, Francis

doi:10.1016/j.ecss.2019.01.025

Cited by 4 publications

(6 citation statements)

References 30 publications

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“…This work should be considered as the first survey of the hyperiid amphipod community in the Desventuradas archipelago and, thus, complements the information on this group to that of Yáñez et al . (2009) for Juan Fernández archipelago and that of Vinogradov (1991) for the Nazca and Salas y Gómez ridge. In general, the hyperiid species found in our study are widely distributed in the world oceans, and they have a tropical and subtropical distribution (Vinogradov et al ., 1996; Zeidler, 2004).…”

Section: Discussionmentioning

confidence: 99%

“…The in situ and monthly mean data of sea surface temperature and salinity are in agreement with other studies that show the surface predominance of subtropical water (STW) in Desventuradas, while in Juan Fernández, subantarctic water (SAAW) prevails (Bahamonde, 1987; Moraga & Argandoña, 2001; Silva et al ., 2009; Aniñir Velásquez, 2019). It is important to add the possible presence of equatorial subsurface water (ESSW) below 200 m, as found in other studies (Yáñez et al ., 2009; Frederick et al ., 2018; Fierro, 2019), but that could not be corroborated in our study due to limited CTD data from deep water.…”

Section: Discussionmentioning

confidence: 99%

“…Studies on other zooplankton groups, such as hyperiid amphipods are scarce (Meruane, 1982;Vinogradov, 1991). Hyperiid amphipods have been recognized as indicators of environmental variability at different time and spatial scales (Lavaniegos & Ohman, 1999;Gasca et al, 2012;Espinosa-Leal & Lavaniegos, 2016;Lavaniegos, 2017), and they are also considered to be of high ecological significance because of their predation impact and importance as secondary producers; thus, they act as links to higher trophic levels in polar and temperate regions (Dauby et al, 2003;Dalpadado et al, 2008;Weil et al, 2019). Ecologically, they are also known to have a close symbiotic link with gelatinous zooplankton (Laval, 1980;Gasca et al, 2007;Riascos et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…In the oceanic area of the South-east Pacific (SEP), a variety of islands and seamounts of volcanic origin are present, associated with the Nazca and Juan Fernández ridges (Yáñez et al ., 2009). The Juan Fernández archipelago is formed by the islands Alejandro Selkirk (33°45′S 80°45′W), Robinson Crusoe (33°40′S 78°50′W) and Santa Clara (33°42′S 79°00′ W), whereas the little known Desventuradas archipelago comprises the San Félix (25°15′S 80°07′W) and San Ambrosio (26°20′S 79°58′W) islands (Aguirre et al ., 2009); both archipelagos are surrounded by numerous seamounts.…”

Section: Introductionmentioning

confidence: 99%

“…The Juan Fernández archipelago is formed by the islands Alejandro Selkirk (33°45′S 80°45′W), Robinson Crusoe (33°40′S 78°50′W) and Santa Clara (33°42′S 79°00′ W), whereas the little known Desventuradas archipelago comprises the San Félix (25°15′S 80°07′W) and San Ambrosio (26°20′S 79°58′W) islands (Aguirre et al ., 2009); both archipelagos are surrounded by numerous seamounts. In the oceanic islands and seamount regions of the SEP, some studies on plankton have shown slight increments in phytoplankton biomass in nearby waters (Yáñez et al ., 2009; Von Dassow & Collado-Fabbri, 2014; Andrade et al ., 2014 a ) and high diversity (although low biomass) of zooplankton (Vinogradov, 1991; Robledo & Mujica, 1999; Palma & Silva, 2006; Frederick et al ., 2018; Fierro, 2019). The high biodiversity of zooplankton has been associated with ecological connectivity promoted by mesoscale activity, which allows the transport of plankton and nutrients from the highly productive coastal upwelling zone off Chile (Andrade et al ., 2012; Andrade et al ., 2014 b ).…”

Section: Introductionmentioning

confidence: 99%

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The community structure of hyperiid amphipods associated with two seamount regions in the South-east Pacific

et al. 2021

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Oceanic islands and seamounts are considered biodiversity hotspots. Here, we present a taxonomy and community analyses of hyperiid amphipods collected near oceanic islands and over seamounts of the Juan Fernández Archipelago and Desventuradas Archipelago in the South-east Pacific. Both archipelagos are separated by about 800 km over the meridional gradient, suggesting the existence of different hyperiid communities because of apparent geographic isolation and distinctive oceanographic characteristics between regions. To test this hypothesis, zooplankton samples were collected from 19 stations during the CIMAR 22 ‘Oceanic Island’ cruise in October–November 2016. In total, 56 species of hyperiids were found, of which Phrosina semilunata, Lestrigonus schizogeneios, Hyperietta stephenseni, Hyperioides longipes, Phronimella elongata and Primno latreillei were the most abundant and recurrent species. The species richness (S), Shannon–Wiener diversity (H’) and dominance (D) of both the archipelagos were not significantly different. Additionally, except for a small group of rare species, the species composition was similar in both areas. Most species showed greater abundances than those observed in the coastal upwelling zone off Chile, whereas shared species between regions suggested the presence of a single biogeographic unit comprising the coastal transition zone and oceanic area off Chile within which both archipelagos are included. Correlation analysis indicated that salinity was the best predictor for the community structure, which provides evidence that the contributions of previously described water masses of the South-east Pacific may influence the spatial distribution and composition of the hyperiid community.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The community structure of hyperiid amphipods associated with two seamount regions in the South-east Pacific

et al. 2021

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Distribution and biodiversity patterns of hyperiid amphipods across the coastal-offshore gradient of the sub-tropical Southeast Pacific

et al. 2021

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The subtropical region of the Southeast Pacific exhibits a strong onshore-offshore gradient in hydrographic conditions and biological production from the eutrophic upwelling zone to the ultra-oligotrophic oceanic area in the central South Pacific gyre (SPG). Across this gradient, zooplankton must cope with either gradual or abrupt changes in environmental conditions. Here, the distribution and diversity of hyperiid amphipods were assessed over this gradient in the upper 1000 m in relation to temperature, salinity, oxygen, chlorophyll-a, sea level anomalies, the bulk of mesozooplankton biomass and the biomass of salps, siphonophores, and other hydrozoans during October/November 2015 from the coastal zone off Chile (27°00‵ S, 70°52‵ W) to near Easter Island within the SPG (27°10‵ S, 109°20‵ W). The most frequent and abundant species were Hyperioides longipes Chevreux, 1900, Eupronoe minuta Claus, 1879, and Hyperioides sibaginis (Stebbing, 1888). Significant changes in abundance and community structure across the gradient with respect to the evaluated environmental variables and significant correlations of 17 hyperiid species with the gelatinous category other hydrozoans were found. These changes were closely linked to previously defined zonation patterns, which contained distinct species assemblages and a unique dominant species per zone. These zones represented ecoregions based on diversity patterns of hyperiids and other shared species among such ecoregions suggesting a possible ecological connectivity among the zones, promoted by mesoscale eddies travelling westward from the coastal upwelling zone to offshore waters. Environmentally forced zonation and the interactions with mesoscale features are thus suggested as the driving processes maintaining spatial patterns of diversity of the hyperiid community in the Southeast Pacific.

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Importance of environmental monitoring: Long-term record of jellyfish (Aurelia aurita) biomass in a shallow semi-enclosed cove (Kertinge Nor, Denmark)

Lüskow

2020

Regional Studies in Marine Science

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A hyperiid amphipod acts as a trophic link between a scyphozoan medusa and juvenile Chinook Salmon

Cited by 4 publications

References 30 publications

The community structure of hyperiid amphipods associated with two seamount regions in the South-east Pacific

The community structure of hyperiid amphipods associated with two seamount regions in the South-east Pacific

Distribution and biodiversity patterns of hyperiid amphipods across the coastal-offshore gradient of the sub-tropical Southeast Pacific

Importance of environmental monitoring: Long-term record of jellyfish (Aurelia aurita) biomass in a shallow semi-enclosed cove (Kertinge Nor, Denmark)

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