Effects of low dissolved oxygen on zooplankton predation by the ctenophore Mnemiopsis leidyi

Decker, Mary Beth; Breitburg, Denise L.; Purcell, Jennifer E.

doi:10.3354/meps280163

Cited by 106 publications

(68 citation statements)

References 51 publications

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“…Ctenophore digestion rates seemed to be unaffected by hypoxic conditions of 0.7 mL O 2 L −1 . In contrast, the jumping frequency of Acartia tonsa copepods decreased significantly with decreasing oxygen concentration (Decker et al, 2004). Such changes in prey behaviour under hypoxic conditions could affect encounter and capture rates, potentially making less-tolerant prey more vulnerable to predation in hypoxic waters.…”

Section: Ecological Effectsmentioning

confidence: 68%

“…Because some gelatinous species, such as the ctenophore Mnemiopsis leidyi, are more tolerant to low dissolved oxygen concentrations than their prey and competitors, hypoxia may have profound effects on trophic interactions (Decker et al, 2004). Under experimental conditions, clearance rates of zooplankton by large ctenophores were higher at low dissolved oxygen concentrations than under normoxic conditions.…”

Section: Ecological Effectsmentioning

confidence: 85%

“…Since gelatinous species are more tolerant to hypoxia than fishes, they may be able to inhabit regions of low oxygen that are avoided by zooplanktivorous fishes with higher oxygen requirements. This could lead to a dominance of gelatinous predators in areas affected by severe hypoxia and might alter trophic pathways in these systems (Decker et al, 2004).…”

Section: Ecological Effectsmentioning

confidence: 99%

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Impacts of hypoxia on the structure and processes in pelagic communities (zooplankton, macro-invertebrates and fish)

et al. 2010

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Abstract. Dissolved oxygen (DO) concentration in the water column is an environmental parameter that is crucial for the successful development of many pelagic organisms. Hypoxia tolerance and threshold values are species-and stagespecific and can vary enormously. While some fish species may suffer from oxygen values of less than 3 mL O 2 L −1 through impacted growth, development and behaviour, other organisms such as euphausiids may survive DO levels as low as 0.1 mL O 2 L −1 . A change in the average or the range of DO may have significant impacts on the survival of certain species and hence on the species composition in the ecosystem with consequent changes in trophic pathways and productivity.Evidence for the deleterious effects of oxygen depletion on pelagic species is scarce, particularly in terms of the effect of low oxygen on development, recruitment and patterns of migration and distribution. While planktonic organisms have to cope with variable DOs and exploit adaptive mechanisms, nektonic species may avoid areas of unfavourable DO and develop adapted migration strategies. Planktonic organisms may only be able to escape vertically, above or beneath the Oxygen Minimum Zone (OMZ). In shallow areas only the surface layer can serve as a refuge, but in deep waters many organisms have developed vertical migration strategies to use, pass through and cope with the OMZ.Correspondence to: W. Ekau (wekau@zmt-bremen.de) This paper elucidates the role of DO for different taxa in the pelagic realm and the consequences of low oxygen for foodweb structure and system productivity. We describe processes in two contrasting systems, the semi-enclosed Baltic Sea and the coastal upwelling system of the Benguela Current to demonstrate the consequences of increasing hypoxia on ecosystem functioning and services.

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Section: Ecological Effectsmentioning

confidence: 68%

Section: Ecological Effectsmentioning

confidence: 85%

Section: Ecological Effectsmentioning

confidence: 99%

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Impacts of hypoxia on the structure and processes in pelagic communities (zooplankton, macro-invertebrates and fish)

et al. 2010

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“…The increased nutrients in coastal waters can significantly increase phytoplankton biomass which could support the food source of jellyfish (e.g., zooplankton). Moreover, the greater tolerance of polyps and medusae to low-oxygen waters gives them an advantage to live in eutrophicated waters compared with fish (Decker et al, 2004;Shoji et al, 2009a). In addition, increased substrate suitable for jellyfish larval settlement has resulted from aquaculture development in coastal waters and this was regarded as an important factor causing A. aurita blooms in Taiwan by Lo et al (2008).…”

Section: Dominant Bloom Forming Jellyfish Species In Chinese Seasmentioning

confidence: 99%

Jellyfish blooms in China: Dominant species, causes and consequences

Dong

Chen

Keesing

2010

Marine Pollution Bulletin

329

193

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“…Reproduction and growth may also be aVected (Breitburg 1992;Miller et al 2002;StierhoV et al 2006). Beyond these direct eVects, there is increasing evidence for indirect eVects (Eby et al 2005) such as changes in competition and predation (Brante and Hughes 2001;Sagasti et al 2001;Decker et al 2004). Although mobile benthos are able to migrate out of the aVected area, the less mobile fauna-unable to escape or avoid hypoxic watersexhibit a series of behavioural patterns in response to decreasing oxygen concentrations (Mistri 2004).…”

Section: Introductionmentioning

confidence: 99%

Sea anemones and brittle stars: unexpected predatory interactions during induced in situ oxygen crises

2008

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During oxygen crises, benthic faunas exhibit a series of behavioural patterns that reXect the duration and severity of the event. During artiWcially induced oxygen deWciencies at 24 m depth in the Northern Adriatic Sea, we photographically documented predation by the sea anemones Cereus pedunculatus (Pennant, 1777) and Calliactis parasitica (Couch, 1842) on the brittle star Ophiothrix quinquemaculata (DelleChiaje, 1828). Five predatory events were recorded with four anemones during nine deployments totalling 817 h of observation. Under near-anoxic conditions, individuals of both actinians made contact with, pulled in and consumed the brittle stars. The duration of each predatory event was 1.5-7.5 h. In three of the Wve events, brittle star remains were regurgitated after an additional 2.0-12.5 h of digestion by the anemones. Our time-lapse sequences demonstrate that oxygen deWciency, beyond eliciting a series of speciWc behaviours in members of each species, also promotes previously unobserved interspeciWc interactions. Our results show that sea anemones are not only highly resistant to anoxia, but may also beneWt by taking advantage of prey that are more vulnerable to anoxic conditions.

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Effects of low dissolved oxygen on zooplankton predation by the ctenophore Mnemiopsis leidyi

Cited by 106 publications

References 51 publications

Impacts of hypoxia on the structure and processes in pelagic communities (zooplankton, macro-invertebrates and fish)

Impacts of hypoxia on the structure and processes in pelagic communities (zooplankton, macro-invertebrates and fish)

Jellyfish blooms in China: Dominant species, causes and consequences

Sea anemones and brittle stars: unexpected predatory interactions during induced in situ oxygen crises

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