Physical and biomimetic treatment methods to reduce microplastic waste accumulation

Molecular & Cellular Toxicology, Journal Year: 2022, Volume and Issue: 19(1), P. 13 - 25

Published: Sept. 21, 2022

Language: Английский

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Dynamic population modeling of bacterioplankton community response to gelatinous marine zooplankton bloom collapse and its impact on marine nutrient balance

Progress In Oceanography, Journal Year: 2024, Volume and Issue: 227, P. 103312 - 103312

Published: July 18, 2024

The diverse microbial community in the ocean, encompassing various metabolic types, interacts with wide array of compounds dissolved organic matter (DOM) pool, thereby influencing ocean's biogeochemical state and, consequently, global climate. Our understanding interactions between specific DOM constituents and consortia remains limited, necessitating further refinement to achieve a mechanistic comprehension relationship field network. Attaining this level is crucial for accurately predicting marine ecosystem's response natural anthropogenic perturbations. To address gap, we developed bacterial population model based on von Foerster equation. This aims describe complex microbial-mediated degradation gelatinous zooplankton (hereinafter 'jellyfish') detritus, as an important, but largely overlooked source ocean. By considering growth decay, well uptake, nutrient release, able community's life cycle, biochemical transformations jellyfish-derived matter. We fitted results laboratory microcosm experiments conducted simulate scenarios experienced by ambient microbiomes during decay two different jellyfish species northern Adriatic Sea. interpreting parameters, highlight differences species, namely how these affect composition release nutrients. has been specifically designed integration ocean circulation models create comprehensive physical-biogeochemical model. Such extended can be utilized multi-scale simulations assess system's Given that blooms may become more prevalent under future scenarios, modeling approach essential their potential impact ecosystems.

Language: Английский

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Similarities between the biochemical composition of jellyfish body and mucus

Journal of Plankton Research, Journal Year: 2021, Volume and Issue: 44(2), P. 337 - 344

Published: Dec. 23, 2021

Recognition of the importance jellyfish in marine ecosystems is growing. Yet, biochemical composition mucus that constantly excrete poorly characterized. Here we analyzed macromolecular (proteins, lipids and carbohydrates) elemental (carbon nitrogen) body five scyphozoan species (Aurelia aurita, Chrysaora fulgida, pacifica, Eupilema inexpectata Rhizostoma pulmo). We found relative contribution different macromolecules elements was similar across all species, with protein being major component samples (81 ± 4% macromolecules; 3.6 3.1% dry weight, DW) followed by (13 0.5 0.4%DW) carbohydrates (6 3% 0.3 0.4%DW). The energy content matter ranged from 0.2 to 3.1 KJ g-1 DW. Carbon nitrogen 3.7 3.0 1.0 0.8%DW, respectively. average ratios protein:lipid:carbohydrate carbon:nitrogen for were 14.6:2.3:1 3.8:1, Our study highlights similarity between provides convenient valuable support integration into trophic biogeochemical models.

Language: Английский

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Feeding Behavior, Shrinking, and the Role of Mucus in the Cannonball Jellyfish Stomolophus sp. 2 in Captivity

Diversity, Journal Year: 2022, Volume and Issue: 14(2), P. 103 - 103

Published: Jan. 31, 2022

The importance of mucus produced by jellyfish species remains as understudied their feeding behavior. Here, we study medusae under captivity, ascertain the role mucus, and describe its Between February March 2019, live adult cannonball jellyfish, Stomolophus sp. 2, were collected in Las Guásimas Bay (Gulf California, Mexico) offered fish eggs, mollusk “D” larvae, or Artemia nauplii 4-day trials. Descriptions structures provided for S. 2. Digitata adhere food scapulets fragment them, which, driven water flow, pass via transport channels to esophagus gastrovascular chamber where is digested. Due stress handling, water, lost structures, decreased size. Based on our observations a thorough literature review, conclude that production 2 plays several roles, facilitating capture packing prey, acting defense mechanism, sexual reproduction; latter improves likelihood population persisting long run, because fertilized oocytes transform planulae, settle, into asexually reproducing polyps. Polyps longer than other life stages are more resistant adverse environmental conditions medusoid stage.

Language: Английский

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In situ imaging across ecosystems to resolve the fine‐scale oceanographic drivers of a globally significant planktonic grazer

Limnology and Oceanography, Journal Year: 2022, Volume and Issue: 68(1), P. 192 - 207

Published: Nov. 26, 2022

Abstract Doliolids are common gelatinous grazers in marine ecosystems around the world and likely influence carbon cycling due to their large population sizes with high growth excretion rates. Aggregations or blooms of these organisms occur frequently, but they difficult measure predict because doliolids fragile, under sampled conventional plankton nets, can aggregate on fine spatial scales (1–10 m). Moreover, ecological studies typically target a single region site that does not encompass range possible habitats favoring doliolid proliferation. To address limitations, we combined situ imaging data from six coastal ecosystems, including Oregon shelf, northern California, southern California Bight, Gulf Mexico, Straits Florida, Mediterranean Sea, resolve compare habitat associations during warm months when environmental gradients strong frequently documented. Higher ocean temperature was strongest predictor elevated abundances across additional variance explained by chlorophyll fluorescence dissolved oxygen. For marginal seas wide productivity regimes, nurse stage tended comprise higher proportion total abundance low. However, this pattern did hold persistent upwelling. The be most aggregated oligotrophic systems (Mediterranea California), suggesting microhabitats within water column favor proliferation scales. Similar comparative approaches realized niche fast‐reproducing animals, thus improving predictions for population‐level responses changing oceanographic conditions.

Language: Английский

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Mucus secretions in Cnidarian, an ecological, adaptive and evolutive tool

Advances in Oceanography and Limnology, Journal Year: 2022, Volume and Issue: 13(2)

Published: Dec. 29, 2022

Mucus secretion provides an interface with unique and multifunctional properties between the epithelial cells of many aquatic organisms their surrounding environment. Indeed, mucus is involved in various essential biological processes including feeding, reproduction, osmoregulation, competition for space, defense against pathogens, xenobiotics, a multitude environmental stressors. The ability to produce functional layer important evolutionary step, arising first Cnidaria that allowed development mucus-lined digestive cavity seen higher metazoans. by cnidarians has been moderately investigated both corals jellyfish, which among are ones have shown highest rates date. However, although production received more attention, especially view ecological role played coral reefs, medusozoans topic little considered. Although secreted innumerable immunological, nutritional, protective responsibilities, it should be remembered jellyfish too represent fundamental component marine trophic web, playing numerous roles still unclear today. What certain characterized (especially era climate change) large fluctuations population density, implications poorly understood. cases (Medusozoans Anthozoans) date some aspects relating mucous secretions seem completely obscure, such as microbiome its variations function conditions or ontogenetic development, field immunological ecology, consequent energy costs finally terms. This review summarizes properties, functions, importance mucus, cnidarians, mainly focusing jellyfish. Understanding these ecosystems functioning.

Language: Английский

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Short-Term Impact of Decomposing Crown-of-Thorn Starfish Blooms on Reef-Building Corals and Benthic Algae: A Laboratory Study

Water, Journal Year: 2024, Volume and Issue: 16(2), P. 190 - 190

Published: Jan. 5, 2024

Outbreaks of crown-of-thorn starfish (COTS) have caused dramatic declines in reefs through predation on corals, but the post-bloom effects COTS may still potentially threaten environment and living organisms due to massive organic decomposition. This stimulation experiment showed that decomposition debris triggered an extra mineralization process resulted acidifying, hypoxic, eutrophic seawater. Consequently, photosynthetic efficiency coral symbionts decreased by 83%, bleached after removing stress within two days, then skeleton dissolved at rates 0.02–0.05 mg cm−2 day−1. Within weeks, photosynthesis growth benthic algae were suppressed 27–86% 1.5–16%, respectively. The mortality turf coralline indicated compromised primary productivity limited recruitment, However, macroalgae, as competitors, became only survivors, with increasing chlorophyll content. study suggests a continuing decline during collapse phase outbreaks highlights need for improving control strategies population.

Language: Английский

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Fine-scale habitat associations of medusae and ctenophores along a gradient of river influence and dissolved oxygen

Estuarine Coastal and Shelf Science, Journal Year: 2022, Volume and Issue: 272, P. 107887 - 107887

Published: May 5, 2022

Language: Английский

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The microbiome of the pelagic tunicate Dolioletta gegenbauri: A potential link between the grazing and microbial food web

Molecular Ecology, Journal Year: 2022, Volume and Issue: 32(23), P. 6564 - 6579

Published: Aug. 22, 2022

Bloom-forming gelatinous zooplankton occur circumglobally and significantly influence the structure of pelagic marine food webs biogeochemical cycling through interactions with microbial communities. During bloom conditions especially, are keystone taxa that help determine fate primary production, nutrient remineralization, carbon export. Using tunicate Dolioletta gegenbauri as a model system for zooplankton, we carried out laboratory-based feeding experiment to investigate potential ecosystem impacts doliolid gut microbiomes communities associated faecal pellets surrounding seawater. Metabarcoding targeting Bacteria Archaea 16S rRNA genes/Archaea) qPCR approaches were used characterize microbiome assemblages. Comparison between sample types revealed distinct patterns in diversity biomass replicable across experiments. These observations support hypothesis their presence trophic activity, doliolids subtropical continental shelf systems where blooms common. starved (representative resident microbiome) possessed low-biomass low-diversity assemblages, suggesting is optimized detrital mode. Bacterial genera Pseudoalteromomas Shimia most abundant core taxa, similar observed other invertebrates. Exploratory bioinformatic analyses predicted functional genes suggest doliolids, via bacterial communities, may affect important processes including nitrogen, sulphur, organic matter cycling.

Language: Английский

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Bacterial degradation of ctenophoreMnemiopsis leidyiorganic matter

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: Aug. 14, 2023

Abstract Blooms of gelatinous zooplankton, an important source protein-rich biomass in coastal waters, often collapse rapidly, releasing large amounts labile detrital organic matter (OM) into the surrounding water. Although these blooms have potential to cause major perturbations marine ecosystem, their effects on microbial community and hence biogeochemical cycles yet be elucidated. We conducted microcosm experiments simulating scenario experienced by bacterial communities after decay a ctenophore ( Mnemiopsis leidyi ) bloom northern Adriatic Sea. Within 24 h, rapid response M. OM was observed, characterized elevated production respiration rates. Compared our previous study jellyfish Aurelia aurita s . l .), degradation revealed that, despite fundamental genetic biochemical differences between two species, similar pattern observed. Combined metagenomic metaproteomic analysis indicated that activity mainly performed Pseudoalteromonas , producing amount proteolytic exoenzymes exhibiting high metabolic activity. Interestingly, reconstructed metagenome-assembled genome (MAG) phenolica almost identical (average nucleotide identity >99%) MAG previously A. study. Taken together data suggest different zooplankton are likely triggering consistent from natural communities, with specific lineages driving remineralization OM. Importance Jellyfish increasingly becoming recurring seasonal event ecosystems, characterised build-up collapses rapidly. perturbations, impact is largely unknown. incubation experiment Northern Adriatic, where we investigated biomass. found actively degraded matter, overall showed striking similarity dynamics observed simulated In both cases single responsible for most This suggests trigger species remineralisation

Language: Английский

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