Jellyfish degradation in a shallow coastal Mediterranean lagoon

Marques, Raquel; Rufino, Marta M.; Darnaude, Audrey M.; Carcaillet, Frédérique; Meffre, Marie; Bonnet, Delphine

doi:10.1016/j.ecss.2021.107527

Cited by 5 publications

(2 citation statements)

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“…Upon GZ death, decomposing bacteria quickly begin to colonize the sinking carcasses and release nutrients back into the water column (Titelman et al 2006;Tinta et al 2016Tinta et al , 2020. While the fast sinking rates of most GZ (Lebrato et al 2013;Stone and Steinberg 2016) provide the potential of transporting the bulk of untransformed organic material below the euphotic zone, the e ciency of this export is subject to physical ow dynamics, plankton composition, biological decay and sinking rates, and the depth at which sinking is initiated, which in turn is affected by their diel vertical migrations (DVM) (Lebrato et al 2011(Lebrato et al , 2013Stone and Steinberg, 2016; Marques et al 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Stone and Steinberg 2016;Marques et al 2021). Intra-speci c variability in body size and elemental composition had been documented for many GZ species, making between-species comparison challenging(Lüskow et al 2021a, b).The slower decay of S. aspera can be partially due to differences in water temperature because published rates are for salps subjected to warmer (> 16 ºC) environmental conditions (Table1).…”

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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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