The larval and benthic stages of the scyphozoan medusa Chrysaora plocamia under El Niño–La Niña thermal regimes

Riascos, José M.; Paredes, Lissette D.; González, Karina; Cáceres, Ignacio; Pacheco, Aldo S.

doi:10.1016/j.jembe.2013.05.006

Cited by 16 publications

(8 citation statements)

References 33 publications

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“…Previous research on the effects of temperature on jellyfish has shown increased growth associated with higher temperatures (Webster & Lucas, 2012). Similar observations were made by Riascos et al (2013), who documented that increments in the temperature regimes may favor asexual reproduction (budding) and podocyst formation in jellyfish, with -3 ). The abbreviations are described in Figure 4.…”

Section: Discussionsupporting

confidence: 57%

Zooplankton abundance during summer in the Bay of La Paz (southwestern Gulf of California, Mexico)

Coria-Monter

Monreal‐Gómez

Salas‐de‐León

2020

Lat. Am. J. Aquat. Res.

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Marine zooplankton play key roles in the transfer of energy to higher trophic levels and the removal of CO2 from the atmosphere through the sedimentation of inorganic and organic carbon compounds included in their fecal pellets. Therefore, differences in the zooplankton groups driven by climate variations could influence the biogeochemical cycles at large oceanic scales. As a contribution to this topic, we analyzed the zooplankton groups in the Bay of La Paz, Gulf of California, Mexico, a highly dynamic basin characterized by its high biological productivity. We used information gathered during multidisciplinary research cruises in the summers of 2008 and 2009. The results showed differences in the hydrographic parameters between both summers, with a higher temperature recorded in 2009. The zooplankton groups showed that the calanoid copepods were the most abundant; however, there were important differences in the relative abundance of the rest of the analyzed groups as an effect of the temperature distribution along the study area, which was confirmed by multivariate statistical methods. These temperature changes were associated with increased gelatinous zooplankton (Cnidaria, Chaetognatha, Appendicularia, and Ctenophora) in 2009 in a region where the temperature was higher, possibly as a result of changes in food (phytoplankton) availability.

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Section: Discussionsupporting

confidence: 57%

Zooplankton abundance during summer in the Bay of La Paz (southwestern Gulf of California, Mexico)

Coria-Monter

Monreal‐Gómez

Salas‐de‐León

2020

Lat. Am. J. Aquat. Res.

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“…Efforts to understand effects of ENSO in coastal ecosystems have been focused on the warming EN phase, while little is known in relation to the cooling LN phase. Being a rather cool coastal system with little seasonality, thermal anomalies during LN are smaller than those observed during EN, which have led to the simplistic assumption that effects should be mild and opposite of those under EN [52]. The P/B ratio during LN 1996 was the lowest observed, reflecting the dominance of older scallops, a poor growth performance, and the lack of recruiting pulses after several spawning events.…”

Section: (D) La Niña Phasementioning

confidence: 99%

Breaking out of the comfort zone: El Niño-Southern Oscillation as a driver of trophic flows in a benthic consumer of the Humboldt Current ecosystem

et al. 2017

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The trophic flow of a species is considered a characteristic trait reflecting its trophic position and function in the ecosystem and its interaction with the environment. However, climate patterns are changing and we ignore how patterns of trophic flow are being affected. In the Humboldt Current ecosystem, arguably one of the most productive marine systems, El Niño-Southern Oscillation is the main source of interannual and longer-term variability. To assess the effect of this variability on trophic flow we built a 16-year series of mass-specific somatic production rate (P/B) of the Peruvian scallop (), a species belonging to a former tropical fauna that thrived in this cold ecosystem. A strong increase of the P/B ratio of this species was observed during nutrient-poor, warmer water conditions typical of El Niño, owing to the massive recruitment of fast-growing juvenile scallops. Trophic ecology theory predicts that when primary production is nutrient limited, the trophic flow of organisms occupying low trophic levels should be constrained (bottom-up control). For former tropical fauna thriving in cold, productive upwelling coastal zones, a short time of low food conditions but warm waters during El Niño could be sufficient to waken their ancestral biological features and display massive proliferations.

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“…Oral arms were inspected for planulae, sectioned, and placed onto a mesh (1 mm mesh-size) in a 10 L plastic box in 1 μm filtered seawater. To initiate shedding of planulae the container was slowly moved and the accumulated planulae were harvested from the bottom ( Riascos et al, 2013 ; Ceh and Riascos, 2017 ). Two hundred planulae from individual medusae were placed into individual plastic receptacles, containing 250 mL of 1 μm filtered seawater and a settlement structure, i.e., a plastic petri dish, placed upside-down on the water surface for planulae to settle on the underside.…”

Section: Methodsmentioning

confidence: 99%

“…The large and abundant jellyfish Chrysaora plocamia (Lesson 1832) occurs along the Atlantic coast of South America, as well as in the Chilean-Peruvian Humboldt Current System where it has been reported for its negative effects on anchovy fisheries and tourism ( Quiñones et al, 2013 ). Its potential to severely alter the highly productive Humboldt Current System ( Thiel et al, 2007 ) makes it a key species to study ( Riascos et al, 2013 ; Riascos et al, 2015 ). As in other Chrysaora species, e.g.…”

Section: Introductionmentioning

confidence: 99%

Jellyfish Life Stages Shape Associated Microbial Communities, While a Core Microbiome Is Maintained Across All

et al. 2018

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The key to 650 million years of evolutionary success in jellyfish is adaptability: with alternating benthic and pelagic generations, sexual and asexual reproductive modes, multitudes of body forms and a cosmopolitan distribution, jellyfish are likely to have established a plenitude of microbial associations. Here we explored bacterial assemblages in the scyphozoan jellyfish Chrysaora plocamia (Lesson 1832). Life stages involved in propagation through cyst formation, i.e., the mother polyp, its dormant cysts (podocysts), and polyps recently excysted (excysts) from podocysts – were investigated. Associated bacterial assemblages were assessed using MiSeq Illumina paired-end tag sequencing of the V1V2 region of the 16S rRNA gene. A microbial core-community was identified as present through all investigated life stages, including bacteria with closest relatives known to be key drivers of carbon, nitrogen, phosphorus, and sulfur cycling. Moreover, the fact that half of C. plocamia’s core bacteria were also present in life stages of the jellyfish Aurelia aurita, suggests that this bacterial community might represent an intrinsic characteristic of scyphozoan jellyfish, contributing to their evolutionary success.

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The larval and benthic stages of the scyphozoan medusa Chrysaora plocamia under El Niño–La Niña thermal regimes

Cited by 16 publications

References 33 publications

Zooplankton abundance during summer in the Bay of La Paz (southwestern Gulf of California, Mexico)

Zooplankton abundance during summer in the Bay of La Paz (southwestern Gulf of California, Mexico)

Breaking out of the comfort zone: El Niño-Southern Oscillation as a driver of trophic flows in a benthic consumer of the Humboldt Current ecosystem

Jellyfish Life Stages Shape Associated Microbial Communities, While a Core Microbiome Is Maintained Across All

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