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Zhukova NV. Fatty Acids of Echinoderms: Diversity, Current Applications and Future Opportunities. Mar Drugs 2022; 21:md21010021. [PMID: 36662194 PMCID: PMC9865275 DOI: 10.3390/md21010021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 12/23/2022] [Accepted: 12/23/2022] [Indexed: 12/29/2022] Open
Abstract
The phylum Echinodermata comprising the classes Asteroidea, Ophiuroidea, Echinoidea, Holothuroidea, and Crinodeia, is one of the important invertebrate groups. Members of this phylum live exclusively in marine habitats and are distributed in almost all depths and latitudes. Some of them, such as sea urchins and sea cucumbers, are commercially valuable and constitute a major fishery resource. Echinoderms are increasingly recognized as a unique source of various metabolites with a wide range of biological activities. The importance of dietary polyunsaturated fatty acids, such as eicosapentaenoic acid, in human health has drawn attention to echinoderms as a promising source of essential fatty acids (FAs). Extensive information on the FAs of the phylum has been accumulated to date. The biosynthetic capabilities and feeding habits of echinoderms explain the findings of the unusual FAs in them. Certain common and unusual FAs may serve as chemotaxonomic markers of the classes. The main goal of the review was to gather the relevant information on the distribution of FAs among the echinoderm classes, describe the structures, distribution, biosynthetic pathways, and bioactivity, with an emphasis on the FAs specific for echinoderms. A large part of the review is devoted to the FAs derived from echinoderms that exhibit various biological activities promising for potential therapeutic applications.
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Affiliation(s)
- Natalia V Zhukova
- National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, 690041 Vladivostok, Russia
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2
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Microbial Composition and Genes for Key Metabolic Attributes in the Gut Digesta of Sea Urchins Lytechinus variegatus and Strongylocentrotus purpuratus Using Shotgun Metagenomics. Curr Issues Mol Biol 2021; 43:978-995. [PMID: 34563039 PMCID: PMC8929034 DOI: 10.3390/cimb43020070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/11/2021] [Accepted: 08/18/2021] [Indexed: 11/17/2022] Open
Abstract
This paper describes the microbial community composition and genes for key metabolic genes, particularly the nitrogen fixation of the mucous-enveloped gut digesta of green (Lytechinus variegatus) and purple (Strongylocentrotus purpuratus) sea urchins by using the shotgun metagenomics approach. Both green and purple urchins showed high relative abundances of Gammaproteobacteria at 30% and 60%, respectively. However, Alphaproteobacteria in the green urchins had higher relative abundances (20%) than the purple urchins (2%). At the genus level, Vibrio was dominant in both green (~9%) and purple (~10%) urchins, whereas Psychromonas was prevalent only in purple urchins (~24%). An enrichment of Roseobacter and Ruegeria was found in the green urchins, whereas purple urchins revealed a higher abundance of Shewanella, Photobacterium, and Bacteroides (q-value < 0.01). Analysis of key metabolic genes at the KEGG-Level-2 categories revealed genes for amino acids (~20%), nucleotides (~5%), cofactors and vitamins (~6%), energy (~5%), carbohydrates (~13%) metabolisms, and an abundance of genes for assimilatory nitrogen reduction pathway in both urchins. Overall, the results from this study revealed the differences in the microbial community and genes designated for the metabolic processes in the nutrient-rich sea urchin gut digesta, suggesting their likely importance to the host and their environment.
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Anedda R, Siliani S, Melis R, Loi B, Baroli M. Lipid metabolism of sea urchin Paracentrotus lividus in two contrasting natural habitats. Sci Rep 2021; 11:14174. [PMID: 34239001 PMCID: PMC8266866 DOI: 10.1038/s41598-021-93669-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 06/07/2021] [Indexed: 11/10/2022] Open
Abstract
Sea urchins Paracentrotus lividus were harvested monthly from April 2015 to March 2016 from two sites in Sardinia (Italy). The two sites, a Posidonia oceanica meadow and a rocky bottom habitat, were naturally characterized by different food sources and availability, being mainly populated by the sea grass Posidonia oceanica and the brown algae Halopteris scoparia, respectively. Total lipids showed a minimum during winter in mature gonads, and a maximum in the summer (recovery stage). Fatty acid (FA) profiles of gut contents and gonads differed from those of the most available food sources. Levels of C18:3 (n-3) (ALA) discriminated samples from the two sites. Despite the very low amounts of C20:5 (n-3) (EPA) and C20:4 (n-6) (ARA) in P. oceanica, the main FA in gonads and gut contents were EPA and ARA in both sites. Increase in green algae intake prior to gametogenesis, especially C. cylindracea, likely affected EPA and ARA levels in gonads. The results show that P. lividus is able to concentrate lipids in gut contents and also to selectively store EPA, ARA and their precursors ALA and 18:2 (n-6) (LA). Moreover, bioconversion of ALA to EPA and of LA to ARA in P. lividus is suggested.
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Affiliation(s)
- Roberto Anedda
- Porto Conte Ricerche S.r.l., S.P. 55 Porto Conte, Capo Caccia, Km 8.400, Loc. Tramariglio, Alghero, SS, Italy.
| | - Silvia Siliani
- Porto Conte Ricerche S.r.l., S.P. 55 Porto Conte, Capo Caccia, Km 8.400, Loc. Tramariglio, Alghero, SS, Italy
| | - Riccardo Melis
- Porto Conte Ricerche S.r.l., S.P. 55 Porto Conte, Capo Caccia, Km 8.400, Loc. Tramariglio, Alghero, SS, Italy
| | - Barbara Loi
- IMC-International Marine Centre, Loc. Sa Mardini, 09170, Torregrande, OR, Italy
| | - Maura Baroli
- IMC-International Marine Centre, Loc. Sa Mardini, 09170, Torregrande, OR, Italy
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Murzina SA, Dgebuadze PY, Pekkoeva SN, Voronin VP, Mekhova ES, Thanh NTH. Lipids and Fatty Acids of the Gonads of Sea Urchin
Diadema setosum
(Echinodermata) From the Coastal Area of the Nha Trang Bay, Central Vietnam. EUR J LIPID SCI TECH 2021. [DOI: 10.1002/ejlt.202000321] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Svetlana A. Murzina
- Laboratory of Environmental Biochemistry Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences 11 Pushkinskaya Street Petrozavodsk Karelia 185910 Russia
| | - Polina Yu. Dgebuadze
- Laboratory of Behavior of Lower Vertebrates A.N. Severtsov Institute of Ecology and Evolution Russian Academy of Sciences 33 Leninskiy prospekt Moscow Moscow 119071 Russia
| | - Svetlana N. Pekkoeva
- Laboratory of Environmental Biochemistry Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences 11 Pushkinskaya Street Petrozavodsk Karelia 185910 Russia
| | - Viktor P. Voronin
- Laboratory of Environmental Biochemistry Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences 11 Pushkinskaya Street Petrozavodsk Karelia 185910 Russia
| | - Elena S. Mekhova
- Laboratory of Morphology and Ecology of Marine Invertebrates A.N. Severtsov Institute of Ecology and Evolution Russian Academy of Sciences 33 Leninskiy prospekt Moscow Moscow 119071 Russia
| | - Nguyen T. H. Thanh
- Coastal Branch Russian‐Vietnamese Tropical Research and Technology Center 30 Nguyen Thien Thuat Nha Trang Khánh Hòa 650000 Vietnam
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Suckling CC. Responses to environmentally relevant microplastics are species-specific with dietary habit as a potential sensitivity indicator. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 751:142341. [PMID: 33181980 DOI: 10.1016/j.scitotenv.2020.142341] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/08/2020] [Accepted: 09/09/2020] [Indexed: 06/11/2023]
Abstract
There is a lack of information on understanding how marine organisms respond to environmentally relevant microplastics (MP) which hampers decision making for waste management strategies. This study addresses this information gap by determining whether responses to MPs are species specific within a functional group. Benthic residing sea urchins, Psammechinus miliaris and Paracentrotus lividus were used as a case study. Psammechinus miliaris are strong omnivores with dietary intake including hard components (e.g. shell, tubeworms) and therefore likely to cope with the ingestion of MPs, while P. lividus are strong herbivores consuming softer dietary items (e.g. biofilms, algae) and therefore more likely sensitive. Responses to environmentally relevant MPs were conducted across two trials. Trial one determined the impact of short term (24 h) external exposure to storm-like sediment resuspension of MP concentrations (53 μm polyvinyl chloride (PVC) 25,000 MP L-1) compared to a control without MPs. No significant impacts were observed for both P. lividus and P. miliaris on metabolic rate or righting time, and urchins were able to remove MPs from the body surface using pedicellariae and cilia. Trial two determined the impact of medium term (2 months) ingestion of a diet laced with PVC MPs (59 μm) at an inclusion rate of 0.5% mass and a control diet (without MPs) on somatic growth and animal condition. The ingestion of MPs did not significantly impact P. miliaris but significantly reduced the alimentary index within P. lividus, indicating a compromised nutritional state. This study shows that responses to microplastics are species-specific and therefore cannot be generalized. Furthermore, feeding habit could act as a potential indicator for sensitivity to MP ingestion which will be important for impact assessments of plastic pollution and management strategies.
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Affiliation(s)
- Coleen C Suckling
- Department of Fishery, Animal and Veterinary Science, University of Rhode Island, Room 129, Woodward Hall, 9 East Alumni Avenue, Kingston 02881, USA.
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Thomas MD, Schram JB, Clark-Henry ZF, Yednock BK, Shanks AL, Galloway AWE. Juvenile Dungeness crabs ( Metacarcinus magister) selectively integrate and modify the fatty acids of their experimental diets. Philos Trans R Soc Lond B Biol Sci 2020; 375:20200038. [PMID: 32536312 PMCID: PMC7333968 DOI: 10.1098/rstb.2020.0038] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/20/2020] [Indexed: 01/06/2023] Open
Abstract
Dungeness crabs (Metacarcinus magister) are ecologically and economically important in the coastal Northeast Pacific, yet relatively little is currently known about their feeding behaviour in the wild or their natural diet. Trophic biomarkers, such as fatty acids (FA), can be used to reveal trophic interactions. We used two feeding experiments to assess differences in FA composition of juvenile crabs fed different known foods to evaluate how they modify and integrate dietary FA into their own tissues and determine whether crab FA reflect diet changes over a six-week period. These experimental results were then compared with the FA signatures of wild caught juvenile crab with undetermined diets. We found that juvenile Dungeness crabs fed different foods assimilated dietary FA into their tissues and were distinct in their FA signatures when analysed with multivariate statistics. Experimentally fed juvenile crabs contained greater proportions of the most abundant long-chain polyunsaturated fatty acids (LCPUFA, >C20) than their foods. Crabs fed foods lacking in LCPUFA, particularly DHA (22:6ω3, docosahexaenoic acid), did not survive or grew slower than crabs fed other foods. This suggests that LCPUFA are physiologically important for this species and indicates biosynthesis of these FA does not occur or is not sufficient to meet their needs. This article is part of the theme issue 'The next horizons for lipids as 'trophic biomarkers': evidence and significance of consumer modification of dietary fatty acids'.
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Affiliation(s)
- Michael D. Thomas
- Department of Biology, University of Oregon Institute of Marine Biology, PO Box 5389, Charleston, OR 97420, USA
| | - Julie B. Schram
- Department of Biology, University of Oregon Institute of Marine Biology, PO Box 5389, Charleston, OR 97420, USA
| | - Zade F. Clark-Henry
- Department of Forest Ecosystems and Society, Oregon State University College of Forestry, 140 Peavy Hall, 3100 SW Jefferson Way, Corvallis, OR 97331, USA
| | - Bree K. Yednock
- South Slough National Estuarine Research Reserve, PO Box 5417, Charleston, OR 97420, USA
| | - Alan L. Shanks
- Department of Biology, University of Oregon Institute of Marine Biology, PO Box 5389, Charleston, OR 97420, USA
| | - Aaron W. E. Galloway
- Department of Biology, University of Oregon Institute of Marine Biology, PO Box 5389, Charleston, OR 97420, USA
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Galloway AWE, Budge SM. The critical importance of experimentation in biomarker-based trophic ecology. Philos Trans R Soc Lond B Biol Sci 2020; 375:20190638. [PMID: 32536303 PMCID: PMC7333966 DOI: 10.1098/rstb.2019.0638] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/19/2020] [Indexed: 01/13/2023] Open
Abstract
Fatty acids are commonly used as biomarkers for making inferences about trophic relationships in aquatic and soil food webs. However, researchers are often unaware of the physiological constraints within organisms on the trophic transfer and modification of dietary biomarkers in consumers. Fatty acids are bioactive molecules, which have diverse structures and functions that both complicate and enhance their value as trophic tracers. For instance, consumers may synthesize confounding non-dietary sourced markers from precursor molecules, and environmental conditions also affect fatty acid composition. There is a vital need for more research on the uptake and transfer of trophic biomarkers in individual organisms in order to advance the field and make meaningful use of these tools at the scale of populations or ecosystems. This special issue is focused on controlled feeding experiments on a diverse taxonomic breadth of model consumers from freshwater, marine and soil ecosystems with a goal of creating a more integrated understanding of the connection between consumer physiology and trophic ecology. This article is part of the theme issue 'The next horizons for lipids as 'trophic biomarkers': evidence and significance of consumer modification of dietary fatty acids'.
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Affiliation(s)
- Aaron W. E. Galloway
- Department of Biology, Oregon Institute of Marine Biology, University of Oregon, Charleston, OR, USA
| | - Suzanne M. Budge
- Department of Process Engineering and Applied Science, Dalhousie University, Halifax, NS, Canada
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Filbee-Dexter K, Pedersen MF, Fredriksen S, Norderhaug KM, Rinde E, Kristiansen T, Albretsen J, Wernberg T. Carbon export is facilitated by sea urchins transforming kelp detritus. Oecologia 2020; 192:213-225. [PMID: 31828530 DOI: 10.1007/s00442-019-04571-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 12/02/2019] [Indexed: 12/01/2022]
Abstract
With the increasing imperative for societies to act to curb climate change by increasing carbon stores and sinks, it has become critical to understand how organic carbon is produced, released, transformed, transported, and sequestered within and across ecosystems. In freshwater and open-ocean systems, shredders play a significant and well-known role in transforming and mobilizing carbon, but their role in the carbon cycle of coastal ecosystems is largely unknown. Marine plants such as kelps produce vast amounts of detritus, which can be captured and consumed by shedders as it traverses the seafloor. We measured capture and consumption rates of kelp detritus by sea urchins across four sampling periods and over a range of kelp detritus production rates and sea urchin densities, in northern Norway. When sea urchin densities exceeded 4 m-2, the sea urchins captured and consumed a high percentage (ca. 80%) of kelp detritus on shallow reefs. We calculated that between 1.3 and 10.8 kg of kelp m-2 are shredded annually from these reefs. We used a hydrodynamic dispersal model to show that transformation of kelp blades to sea urchin feces increased its export distance fourfold. Our findings show that sea urchins can accelerate and extend the export of carbon to neighboring areas. This collector-shredder pathway could represent a significant flow of small particulate carbon from kelp forests to deep-sea areas, where it can subsidize benthic communities or contribute to the global carbon sink.
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Affiliation(s)
- Karen Filbee-Dexter
- Institute of Marine Research, His, Norway.
- Norwegian Institute for Water Research, Oslo, Norway.
| | | | - Stein Fredriksen
- Institute of Marine Research, His, Norway
- University of Olso, Oslo, Norway
| | | | - Eli Rinde
- Norwegian Institute for Water Research, Oslo, Norway
| | | | | | - Thomas Wernberg
- Department of Science and Environment, Roskilde University, Roskilde, Denmark
- UWA Oceans Institute, School of Biological Sciences, University of Western Australia, Crawley, Australia
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Hakim JA, Schram JB, Galloway AWE, Morrow CD, Crowley MR, Watts SA, Bej AK. The Purple Sea Urchin Strongylocentrotus purpuratus Demonstrates a Compartmentalization of Gut Bacterial Microbiota, Predictive Functional Attributes, and Taxonomic Co-Occurrence. Microorganisms 2019; 7:E35. [PMID: 30691133 PMCID: PMC6406795 DOI: 10.3390/microorganisms7020035] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 01/13/2019] [Accepted: 01/21/2019] [Indexed: 12/13/2022] Open
Abstract
The sea urchin Strongylocentrotus purpuratus (order Camarodonta, family Strongylocentrotidae) can be found dominating low intertidal pool biomass on the southern coast of Oregon, USA. In this case study, three adult sea urchins were collected from their shared intertidal pool, and the bacteriome of their pharynx, gut tissue, and gut digesta, including their tide pool water and algae, was determined using targeted high-throughput sequencing (HTS) of the 16S rRNA genes and bioinformatics tools. Overall, the gut tissue demonstrated Arcobacter and Sulfurimonas (Epsilonproteobacteria) to be abundant, whereas the gut digesta was dominated by Psychromonas (Gammaproteobacteria), Propionigenium (Fusobacteria), and Flavobacteriales (Bacteroidetes). Alpha and beta diversity analyses indicated low species richness and distinct microbial communities comprising the gut tissue and digesta, while the pharynx tissue had higher richness, more closely resembling the water microbiota. Predicted functional profiles showed Kyoto Encyclopedia of Genes and Genomes (KEGG) Level-2 categories of energy metabolism, membrane transport, cell motility, and signal transduction in the gut tissue, and the gut digesta represented amino acid, carbohydrate, vitamin and cofactor metabolisms, and replication and repair. Co-occurrence network analysis showed the potential relationships and key taxa, such as the highly abundant Arcobacter and Propionigenium, influencing population patterns and taxonomic organization between the gut tissue and digesta. These results demonstrate a trend of microbial community integration, allocation, predicted metabolic roles, and taxonomic co-occurrence patterns in the S. purpuratus gut ecosystem.
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Affiliation(s)
- Joseph A Hakim
- Department of Biology, University of Alabama at Birmingham, 1300 University Blvd., Birmingham, AL 35294, USA.
| | - Julie B Schram
- Oregon Institute of Marine Biology, University of Oregon, 63466 Boat Basin Rd, Charleston, OR 97420, USA.
| | - Aaron W E Galloway
- Oregon Institute of Marine Biology, University of Oregon, 63466 Boat Basin Rd, Charleston, OR 97420, USA.
| | - Casey D Morrow
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, 1918 University Blvd., Birmingham, AL 35294, USA.
| | - Michael R Crowley
- Department of Genetics, Heflin Center Genomics Core, School of Medicine, University of Alabama at Birmingham, 705 South 20th Street, Birmingham, AL 35294, USA.
| | - Stephen A Watts
- Department of Biology, University of Alabama at Birmingham, 1300 University Blvd., Birmingham, AL 35294, USA.
| | - Asim K Bej
- Department of Biology, University of Alabama at Birmingham, 1300 University Blvd., Birmingham, AL 35294, USA.
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