Microbial transformation of jellyfish organic matter affects the nitrogen cycle in the marine water column — A Black Sea case study

Tinta, Tinkara; Kogovšek, Tjaša; Turk, Valentina; Shiganova, Tamara A.; Mikaelyan, Alexander S.; Malej, Alenka

doi:10.1016/j.jembe.2015.10.018

Cited by 32 publications

(31 citation statements)

References 49 publications

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“…The quiescent individuals above the layer of anoxia were most likely affected by hypoxia since decreasing O 2 sat. from the maximum of 101% at 18.5 m to depleted O 2 at 39 m (Benović et al 2000) probably caused death to many individuals of Aurelia sp., which might have been a significant source of NH 4 in BL (Tinta et al 2010(Tinta et al , 2016. However, deep water of SL had significantly (p<0.01) higher NH 4 than deep water of BL, which is, together with the gradient of NH 4 concentration below the depth of 20 m in SL (Benović et al 2000), in line with our results (Fig.…”

Section: Discussionsupporting

confidence: 91%

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Hypoxia in deep waters of moderately eutrophic marine lakes, Island of Mljet, eastern Adriatic Sea

Hrustić

Bobanović-Ćolić

2017

Sci. Mar.

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Summary:In this study, we explored the impact of eutrophication and stratification on hypoxia in deep waters of moderately warm Croatian marine lakes. Although the Mljet Lakes (MLs) are predominantly oligotrophic, mesotrophic conditions are present at depths below 20 m in the Small Lake (SL) and below 30 m in the Big Lake (BL), along with higher apparent oxygen utilization (AOU). Hypoxia at depths ≥25 m in SL and and ≥40 m in BL was observed between October 2009 and January 2010, and in SL in summer (July and September 2010). Significant differences (p<0.05) in several physical, biological and chemical parameters were detected between the lakes, while AOU, derived oxygen utilization rate (OUR) and organic carbon remineralization rate (OCRR) were not significantly different (p>0.05) between the lakes. An intense and persistent pycnocline throughout the year, comparatively high water temperature, extended water renewal time and summer phytoplankton bloom were identified as physical and biological parameters which might have significantly contributed to increased frequency of hypoxic events in a shallow SL. Significantly (p<0.05) higher ammonium concentration in SL, especially in its deep water, seems to be a long-term chemical feature related to the poor ventilation and higher sediment oxygen demand. At the current level of eutrophication and the present climate change trends, the MLs and similar systems may experience more persistent and intense stratification, which could further prevent mixing between upper and deep waters, likely leading to increasing duration of hypoxia and its negative impacts on the biodiversity of benthic communities.Keywords: hypoxia; eutrophication, marine lakes, coastal zone, Adriatic Sea, Mediterannean Sea. Hipoxia en aguas profundas de lagos marinos moderadamente eutróficos, isla de Mljet, mar Adriático orientalResumen: En este estudio, exploramos el impacto de la eutrofización y la estratificación sobre la hipoxia, en aguas profundas de los lagos marinos croatas moderadamente cálidos. Aunque los lagos Mljet (LsM) son predominantemente oligotróficos, las condiciones mesotróficas están presentes a profundidades inferiores a 20 m en el Lago Menor (LMe) y a 30 m en el Lago Mayor (LMa), junto con un mayor uso del oxígeno aparente (UOA). Fue observada hipoxia a profundidades ≥25 m en el LMe y ≥40 m en el LMa entre octubre de 2009 y enero de 2010, y en LMe en verano (julio y septiembre de 2010). Fueron detectadas diferencias significativas (p<0.05) en varios parámetros físicos, biológicos y químicos entre los lagos, mientras que el UOA, la tasa de utilización de oxígeno derivado y la tasa de remineralización de carbono orgánico no fueron significativamente diferentes (p>0.05) entre los lagos. La intensa y persistente picnoclina a lo largo del año, la temperatura comparativamente alta del agua, el tiempo prolongado de renovación del agua y la floración estival del fitoplancton se identificaron como parámetros físicos y biológicos que podrían haber contribuido significativamente incrementando...

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Section: Discussionsupporting

confidence: 91%

“…(Alvarez-Colombo et al 2009, Tinta et al 2016 and other zooplankton and phytoplankton. The positive correlations between S and NO 3 in the MLs are in accordance with oxidation (i.e.…”

Section: Nutrients and Estimate Of Phytoplankton Growthmentioning

confidence: 99%

Hypoxia in deep waters of moderately eutrophic marine lakes, Island of Mljet, eastern Adriatic Sea

Hrustić

Bobanović-Ćolić

2017

Sci. Mar.

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“…These models do not include jelly‐C (except larvaceans; Lombard & Kiørboe, ; Lombard et al, ) not only because this carbon transport mechanism is considered transient/episodic and not usually observed, and mass fluxes are too big to be collected by sediment traps (e.g., Siegel et al, ), but also because models aim to simplify the biotic compartments to facilitate calculations. Furthermore, jelly‐C deposits tend not to build up at the seafloor over a long time, such as phytodetritus (Beaulieu, ), being consumed rapidly by demersal and benthic organisms (Sweetman et al, ) or decomposed by microbes (Tinta et al, ). The jelly‐C sinking rate is governed by organism size, diameter, biovolume, geometry (Walsby & Xypolyta, ), density (Yamamoto et al, ), and drag coefficients (McDonnell & Buesseler, ).…”

Section: Introductionmentioning

confidence: 99%

“…Jelly-C per se represents a transfer of "already exported" particles (below the mixed later, euphotic or mesopelagic zone), originated in primary production since gelatinous zooplankton "repackage" and integrate this carbon in their bodies, and after death transfer it to the ocean's interior. While sinking through the water column, jelly-C is partially or totally remineralized as dissolved organic/inorganic carbon and nutrients (DOC, DIC, DON, DOP, DIN, and DIP;Chelsky et al, 2015;Sweetman et al, 2016;West et al, 2009), and any left overs further experience microbial decomposition or are scavenged by macrofauna and megafauna once on the seabed (Sweetman et al, 2014;Tinta et al, 2016). Despite the high lability of jelly-C (Ates, 2017;Sweetman et al, 2016), a remarkably large amount of biomass arrives at the seabed below 1,000 m. During sinking, jelly-C biochemical composition changes via shifts in C:N:P ratios as observed in experimental studies (Frost et al, 2012;Sempere et al, 2000;Titelman et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Sinking of Gelatinous Zooplankton Biomass Increases Deep Carbon Transfer Efficiency Globally

Lebrato

Pahlow

Frost

et al. 2019

Global Biogeochemical Cycles

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Gelatinous zooplankton (Cnidaria, Ctenophora, and Urochordata, namely, Thaliacea) are ubiquitous members of plankton communities linking primary production to higher trophic levels and the deep ocean by serving as food and transferring “jelly‐carbon” (jelly‐C) upon bloom collapse. Global biomass within the upper 200 m reaches 0.038 Pg C, which, with a 2–12 months life span, serves as the lower limit for annual jelly‐C production. Using over 90,000 data points from 1934 to 2011 from the Jellyfish Database Initiative as an indication of global biomass (JeDI: http://jedi.nceas.ucsb.edu, http://www.bco-dmo.org/dataset/526852), upper ocean jelly‐C biomass and production estimates, organism vertical migration, jelly‐C sinking rates, and water column temperature profiles from GLODAPv2, we quantitatively estimate jelly‐C transfer efficiency based on Longhurst Provinces. From the upper 200 m production estimate of 0.038 Pg C year−1, 59–72% reaches 500 m, 46–54% reaches 1,000 m, 43–48% reaches 2,000 m, 32–40% reaches 3,000 m, and 25–33% reaches 4,500 m. This translates into ~0.03, 0.02, 0.01, and 0.01 Pg C year−1, transferred down to 500, 1,000, 2,000, and 4,500 m, respectively. Jelly‐C fluxes and transfer efficiencies can occasionally exceed phytodetrital‐based sediment trap estimates in localized open ocean and continental shelves areas under large gelatinous blooms or jelly‐C mass deposition events, but this remains ephemeral and transient in nature. This transfer of fast and permanently exported carbon reaching the ocean interior via jelly‐C constitutes an important component of the global biological soft‐tissue pump, and should be addressed in ocean biogeochemical models, in particular, at the local and regional scale.

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“…3) successive transformation -unidirectional transformation of substances into other ones, also considered as pollutants (most typical example -successive transformations of organic nitrogen into ammonium, nitrite and nitrate) [17,18]; 4) mutual transformation.…”

Section: Review Of Literary Resourcesmentioning

confidence: 99%

Improvement of the Model of Transformation of Nitrogen-Containing Substances in a Water Body for the Solution of Nature Management Problem

Proskurnin

Berezenko

Kyrpychova

et al. 2017

EUREKA: Life Sciences

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In the article is considered the one of aspects of nature management regulation – an account of successive transformation of pollutants in a water body, that come with waste waters of industrial, municipal and agricultural enterprises. It is necessary at the determination of permissible pollutants emission with waste waters that doesn’t allow the excess of the permissible level of substances content in the control point of a water body. This problem is considered on the example of successive transformation of nitrogen-containing substances in the following transformation order: organic nitrogen – ammonium nitrogen - nitrite nitrogen – nitrate nitrogen. The topicality of the modeling of nitrogen-containing substances is conditioned by their role in water ecosystems functioning. At that existent mathematical models of natural water quality formation that take into account substances transformation contain the large number of unknown parameters. So, the use of such models in problems of nature management regulation is problematic, because identification of model parameters is a separate very complicated scientific problem. And existent models with relatively small number of parameters don’t take into account the natural pollution of water bodies, caused by the life activity of organisms; substance losses in the transformational chain are also possible. The improved matrix mathematical model of nitrogen-containing substances transformation without the indicated shortcomings is offered.

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Microbial transformation of jellyfish organic matter affects the nitrogen cycle in the marine water column — A Black Sea case study

Cited by 32 publications

References 49 publications

Hypoxia in deep waters of moderately eutrophic marine lakes, Island of Mljet, eastern Adriatic Sea

Hypoxia in deep waters of moderately eutrophic marine lakes, Island of Mljet, eastern Adriatic Sea

Sinking of Gelatinous Zooplankton Biomass Increases Deep Carbon Transfer Efficiency Globally

Improvement of the Model of Transformation of Nitrogen-Containing Substances in a Water Body for the Solution of Nature Management Problem

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