Gelatinous and soft-bodied zooplankton in the Northeast Pacific Ocean: Phosphorus content and potential resilience to phosphorus limitation

Lüskow, Florian; Galbraith, Moira; Hunt, Brian P. V.; Perry, R. Ian; Boersma, Maarten; Pakhomov, Evgeny A.

doi:10.1007/s10750-021-04758-9

Cited by 8 publications

(4 citation statements)

References 64 publications

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“…Other molar ratios (C/P and N/P) did not vary with size and fell in between previously reported values for sowerbii and G. vertens (Jankowski, 2000;Malzahn et al, 2010). On a broader scale, C/P values of C. sowerbii rank at the lower end of the range reported for (predominantly marine) GZ (Lüskow et al, 2022).…”

Section: Stoichiometry Of Medusae and Implications For Food Webssupporting

confidence: 82%

“…Unfortunately, there are no P content data published for any other olindiid species. Marine GZ have typically P contents that are 2-to 10fold lower than what is reported for C. sowerbii (Lüskow et al, 2022). This difference is likely explained by the variable contribution of salt to the DW.…”

Section: Stoichiometry Of Medusae and Implications For Food Websmentioning

confidence: 66%

“…The ratio at which P becomes limiting is species-specific (threshold elemental ratio; Khattak et al, 2018) and may even change with development and activity. Unfortunately, such food quality data are extremely rare for GZ organisms (Lüskow et al, 2022), which makes generalizations of their trophic roles speculative. Especially for smaller, cryptic GZ species, such as members of the Olindiidae family, there is an urgent need for more data (Pauly et al, 2009;Lamb et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Genetic variability, biomass parameters, elemental composition and energy content of the non-indigenous hydromedusa Craspedacusta sowerbii in North America

Lüskow

Boersma

López–González

et al. 2022

Journal of Plankton Research

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The freshwater hydrozoan Craspedacusta sowerbii was introduced to habitats around the world and they spread into the surrounding water bodies thereafter. Despite an increase in reported observations, little is known about its genetics, physiology and ecology. The present study examined the organic content, elemental composition and energy content of jellyfish collected in Canada and the USA and compared these metrics with their marine counterparts and other co-occurring zooplankton. Specimens from the sampled lakes were sexed and molecularly characterized. Molecular, stoichiometric and energetic information is critical in determining distribution pathways and trophic connections. Molecular analyses showed two closely related sequences in North America, one shared by the Canadian and Japanese specimens, while another one is widely present across the Americas. Organic and all elemental contents were higher compared to marine jellyfish species. Estimated energy content of C. sowerbii was 20–27 kJ g DW−1, which is 2-fold higher than for marine hydrozoans and compared well with cladocerans, copepods and rotifers. Estimated C/P values indicated that cladocerans and copepods are suitable prey for C. sowerbii and that jellyfish may compete with juvenile fish to fulfill similar nutrient demands. Freshwater jellyfish were stoichiometrically and energetically different from marine hydrozoans, indicating higher importance in freshwater food webs than previously thought.

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Section: Stoichiometry Of Medusae and Implications For Food Webssupporting

confidence: 82%

Section: Stoichiometry Of Medusae and Implications For Food Websmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

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Genetic variability, biomass parameters, elemental composition and energy content of the non-indigenous hydromedusa Craspedacusta sowerbii in North America

Lüskow

Boersma

López–González

et al. 2022

Journal of Plankton Research

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“…In addition to population variations, interest in the ecology of large jellyfish has expanded during the last three decades due to the frequent appearance of these gelatinous organisms and their consequences on ecosystems [31,32]. The fluctuations in large jellyfish populations may affect fishery stocks by affecting the zooplankton community composition [2,3,15,33].…”

Section: Introductionmentioning

confidence: 99%

Distribution Patterns of Large Jellyfish and Their Effects on the Zooplankton Community in the Northern Chinese Coastal Seas during the Summer of 2021

et al. 2023

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The northern Chinese coastal seas have been observed to constitute a large jellyfish blooming hotspots during the las decades. The spatial distribution of the abundance and biomass of large jellyfish was investigated in this area through a bottom trawl survey during the summer of 2021. Nemopilema nomurai, Cyanea spp., Aurelia coerulea, Aequorea spp., and Ulmaridae (undefined sp.) were identified during the investigation. The realized niches of the three most abundant species (N. nomurai, Cyanea spp., and A. coerulea) were measured through the maximum entropy (MaxEnt) model to explain their spatial distribution patterns. Nemopilema nomurai was used as a representative species to estimate the feeding rate and feeding pressure of large jellyfish on the zooplankton. During N. nomurai blooms, the potential consumption of zooplankton by N. nomurai was enormous and even exceeded the zooplankton productivity in regions where N. nomurai assembled in this study. Reductions in absolute and relative abundance were noted in small copepods at mid-bloom and bloom stations compared to non-bloom stations. The realized niches of large jellyfish and their relationships with the zooplankton in this study would be helpful for understanding their biogeographic distribution and ecological roles in the northern Chinese coastal seas under future climate change scenarios.

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The fate of salp blooms: decomposition and sinking of salp carcasses

Orlov,

Pakhomov

2024

Mar Biol

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Gelatinous zooplankton (GZ) biomass is an important, yet often overlooked, vector of the particulate organic matter downward export and a nutritional prey source for the mesopelagic and benthic communities. To better quantify the potential impact of their blooms on biogeochemistry and food webs, we performed decomposition and sinking experiments under two different temperature regimes, 6 and 12 °C using 260 Salpa aspera, sampled in the Northeast Paci c (48.39°-50.40°N, 126.40°-145.00°W) during May 2021. Salp decay was exponential and occurred ~1.5 times faster under warmer conditions. Comparison of the published GZ decay rates supported their strong temperature dependence (Q 10 = 3.46) and revealed that S. aspera decayed slower than most GZ taxa.Carcass sinking rates were higher than previously reported for this species and slowed after a prolonged decay.Biochemical (proteins, carbohydrates, lipids) and elemental (C: carbon, N: nitrogen) compositions were determined for salps at various decomposition stages. The high water content (~97%) and low organic content (27.8 ± 7.1 % dry weight) was typical of other thaliaceans. The high C:N ratio (6.61 ± 1.14) of S. aspera, compared to many thaliaceans, suggested that their carcasses are valuable sources of carbon beyond the euphotic zone.

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Gelatinous and soft-bodied zooplankton in the Northeast Pacific Ocean: Phosphorus content and potential resilience to phosphorus limitation

Cited by 8 publications

References 64 publications

Genetic variability, biomass parameters, elemental composition and energy content of the non-indigenous hydromedusa Craspedacusta sowerbii in North America

Genetic variability, biomass parameters, elemental composition and energy content of the non-indigenous hydromedusa Craspedacusta sowerbii in North America

Distribution Patterns of Large Jellyfish and Their Effects on the Zooplankton Community in the Northern Chinese Coastal Seas during the Summer of 2021

The fate of salp blooms: decomposition and sinking of salp carcasses

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