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Article: Host-Microbiome Interactions in a Changing Sea: The Gill Microbiome of an Invasive Oyster under Drastic Temperature Changes.

Dor-Roterman, Yahala Rina / Benayahu, Yehuda / Reshef, Leah / Gophna, Uri

2024 Volume 12, Issue 1

Abstract: The gill tissue of bivalve mollusks hosts rich symbiotic microbial communities that may contribute to host health. ...

Abstract	The gill tissue of bivalve mollusks hosts rich symbiotic microbial communities that may contribute to host health.
Language	English
Publishing date	2024-01-18
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2720891-6
ISSN	2076-2607
ISSN	2076-2607
DOI	10.3390/microorganisms12010197
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: A new genus of soft coral (Octocorallia, Malacalcyonacea, Cladiellidae) and three new species from Indo-Pacific coral reefs.

McFadden, Catherine S / Benayahu, Yehuda / Samimi-Namin, Kaveh

ZooKeys

2024 Volume 1188, Page(s) 275–304

Abstract: Molecular systematic studies of the anthozoan class Octocorallia have revealed widespread incongruence between phylogenetic relationships and taxonomic classification at all levels of the Linnean hierarchy. Among the soft coral taxa in order ... ...

Abstract	Molecular systematic studies of the anthozoan class Octocorallia have revealed widespread incongruence between phylogenetic relationships and taxonomic classification at all levels of the Linnean hierarchy. Among the soft coral taxa in order Malacalcyonacea, the family Alcyoniidae and its type genus
Language	English
Publishing date	2024-01-10
Publishing country	Bulgaria
Document type	Journal Article
ZDB-ID	2445640-8
ISSN	1313-2970 ; 1313-2989
ISSN (online)	1313-2970
ISSN	1313-2989
DOI	10.3897/zookeys.1188.110617
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Article ; Online: A Unique Marine-Derived Collagen: Its Characterization towards Biocompatibility Applications for Tissue Regeneration.

Benayahu, Dafna / Benayahu, Yehuda

Marine drugs

2021 Volume 19, Issue 8

Abstract: Biomedical engineering combines engineering and materials methods to restore, maintain, improve, or replace different types of biological tissues. In tissue engineering, following major injury, a scaffold is designed to support the local growth of cells, ...

Abstract	Biomedical engineering combines engineering and materials methods to restore, maintain, improve, or replace different types of biological tissues. In tissue engineering, following major injury, a scaffold is designed to support the local growth of cells, enabling the development of new viable tissue. To provide the conditions for the mechanical and structural properties needed for the restored tissue and its appropriate functioning, the scaffold requires specific biochemical properties in order to ensure a correct healing process. The scaffold creates a support system and requires a suitable material that will transduce the appropriate signals for the regenerative process to take place. A scaffold composed of material that mimics natural tissue, rather than a synthetic material, will achieve better results. Here, we provide an overview of natural components of marine-derived origin, the collagen fibers characterization schematic is summarized in the graphical abstract. The use of collagen fibers for biomedical applications and their performances in cell support are demonstrated in an in vitro system and in tissue regeneration in vivo.
MeSH term(s)	Animals ; Anthozoa ; Aquatic Organisms ; Collagen/chemistry ; Humans ; Tissue Engineering ; Tissue Scaffolds/chemistry
Chemical Substances	Collagen (9007-34-5)
Language	English
Publishing date	2021-07-26
Publishing country	Switzerland
Document type	Journal Article ; Review
ZDB-ID	2175190-0
ISSN	1660-3397 ; 1660-3397
ISSN (online)	1660-3397
ISSN	1660-3397
DOI	10.3390/md19080419
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Article: A Unique Marine-Derived Collagen: Its Characterization towards Biocompatibility Applications for Tissue Regeneration

Benayahu, Dafna / Benayahu, Yehuda

Marine drugs. 2021 July 26, v. 19, no. 8

2021

Abstract	Biomedical engineering combines engineering and materials methods to restore, maintain, improve, or replace different types of biological tissues. In tissue engineering, following major injury, a scaffold is designed to support the local growth of cells, enabling the development of new viable tissue. To provide the conditions for the mechanical and structural properties needed for the restored tissue and its appropriate functioning, the scaffold requires specific biochemical properties in order to ensure a correct healing process. The scaffold creates a support system and requires a suitable material that will transduce the appropriate signals for the regenerative process to take place. A scaffold composed of material that mimics natural tissue, rather than a synthetic material, will achieve better results. Here, we provide an overview of natural components of marine-derived origin, the collagen fibers characterization schematic is summarized in the graphical abstract. The use of collagen fibers for biomedical applications and their performances in cell support are demonstrated in an in vitro system and in tissue regeneration in vivo.
Keywords	biocompatibility ; collagen ; synthetic products ; tissue repair
Language	English
Dates of publication	2021-0726
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article
ZDB-ID	2175190-0
ISSN	1660-3397
ISSN	1660-3397
DOI	10.3390/md19080419
Database	NAL-Catalogue (AGRICOLA)

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Article: Soft coral reproductive phenology along a depth gradient: Can “going deeper” provide a viable refuge?

Liberman, Ronen / Shlesinger, Tom / Loya, Yossi / Benayahu, Yehuda

Ecology. 2022 Sept., v. 103, no. 9

2022

Abstract: Many species across a wide range of taxa and habitats display phenological shifts and differences in response to both environmental gradients and climate change. Moreover, the wide‐scale decline of numerous ecosystems is leading to increasing efforts to ... ...

Abstract	Many species across a wide range of taxa and habitats display phenological shifts and differences in response to both environmental gradients and climate change. Moreover, the wide‐scale decline of numerous ecosystems is leading to increasing efforts to identify zones that might serve as natural refuges from various disturbances, including ocean warming. One such refuge was suggested to be that of the deep coral reefs, but whether depth can provide coral populations with a viable and reproductive refuge remains unclear. Given the global coral‐reef degradation and the key role that corals play as ecosystem engineers, their reproductive ecology has been widely studied. A particular knowledge gap nonetheless exists regarding coral reproductive phenology along a depth gradient. Filling in this gap may uncover the environmental cues that regulate coral reproduction, leading to better predictions of population connectivity, and their possible responses to climate change and other environmental changes. Here, using long‐term in situ observations of the soft coral Rhytisma fulvum's reproductive activity along its entire depth range (0–45 m), we examined the relationship among several environmental factors and the coral's reproductive phenology and activity over five successive annual breeding seasons. Compared with the shallow depths, a lower number of reproducing colonies was found in habitats deeper than 30 m, highlighting possible constraints on coral reproduction at the deeper end of their range. Our results further revealed that an increase in seawater temperature over 1–2‐day intervals during the breeding season correlated with the onset of reproductive activity along the depth gradient, leading to different reproductive periodicities in different depths. These differences suggest that differential temperature regimes and reproductive timing across depth may create intraspecific temporal reproductive segregation, possibly reducing connectivity among populations along a depth gradient. Moreover, we found high variability among years in both the timing of breeding activities and in the level of reproductive synchrony among corals from different depths. Overall, our study questions whether depth can provide a long‐term and viable refuge for corals in the face of global environmental changes.
Keywords	Rhytisma ; climate change ; corals ; ecosystems ; phenology ; reproduction ; seawater ; temperature
Language	English
Dates of publication	2022-09
Publishing place	John Wiley & Sons, Inc.
Document type	Article
Note	JOURNAL ARTICLE
ZDB-ID	1797-8
ISSN	0012-9658
ISSN	0012-9658
DOI	10.1002/ecy.3760
Database	NAL-Catalogue (AGRICOLA)

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Article: Octocorals in the Gulf of Aqaba exhibit high photosymbiont fidelity.

Liberman, Ronen / Benayahu, Yehuda / Huchon, Dorothée

Frontiers in microbiology

2022 Volume 13, Page(s) 1005471

Abstract: Symbiotic associations, widespread in terrestrial and marine ecosystems, are of considerable ecological importance. Many tropical coral species are holobionts, formed by the obligate association between a cnidarian host and endosymbiotic dinoflagellates ... ...

Abstract	Symbiotic associations, widespread in terrestrial and marine ecosystems, are of considerable ecological importance. Many tropical coral species are holobionts, formed by the obligate association between a cnidarian host and endosymbiotic dinoflagellates of the family Symbiodiniaceae. The latter are abundant on coral reefs from very shallow water down to the upper mesophotic zone (30-70 m). The research on scleractinians has revealed that the photosymbiont lineages present in the cnidarian host play an important role in the coral's ability to thrive under different environmental conditions, such as light regime and temperature. However, little is known regarding octocoral photosymbionts, and in particular regarding those found deeper than 30 m. Here, we used ribosomal (ITS2) and chloroplast (23S) markers to uncover, for the first time, the dominant Symbiodiniaceae taxa present in 19 mesophotic octocoral species (30-70 m depth) from the Gulf of Aqaba/Eilat (northern Red Sea). In addition, using high-throughput sequencing of the ITS2 region we characterized both the dominant and the rare Symbiodiniaceae lineages found in several species across depth. The phylogenetic analyses of both markers were in agreement and revealed that most of the studied mesophotic octocorals host the genus
Language	English
Publishing date	2022-11-25
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2587354-4
ISSN	1664-302X
ISSN	1664-302X
DOI	10.3389/fmicb.2022.1005471
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Article ; Online: Soft coral reproductive phenology along a depth gradient: Can "going deeper" provide a viable refuge?

Liberman, Ronen / Shlesinger, Tom / Loya, Yossi / Benayahu, Yehuda

Ecology

2022 Volume 103, Issue 9, Page(s) e3760

Abstract: Many species across a wide range of taxa and habitats display phenological shifts and differences in response to both environmental gradients and climate change. Moreover, the wide-scale decline of numerous ecosystems is leading to increasing efforts to ... ...

Abstract	Many species across a wide range of taxa and habitats display phenological shifts and differences in response to both environmental gradients and climate change. Moreover, the wide-scale decline of numerous ecosystems is leading to increasing efforts to identify zones that might serve as natural refuges from various disturbances, including ocean warming. One such refuge was suggested to be that of the deep coral reefs, but whether depth can provide coral populations with a viable and reproductive refuge remains unclear. Given the global coral-reef degradation and the key role that corals play as ecosystem engineers, their reproductive ecology has been widely studied. A particular knowledge gap nonetheless exists regarding coral reproductive phenology along a depth gradient. Filling in this gap may uncover the environmental cues that regulate coral reproduction, leading to better predictions of population connectivity, and their possible responses to climate change and other environmental changes. Here, using long-term in situ observations of the soft coral Rhytisma fulvum's reproductive activity along its entire depth range (0-45 m), we examined the relationship among several environmental factors and the coral's reproductive phenology and activity over five successive annual breeding seasons. Compared with the shallow depths, a lower number of reproducing colonies was found in habitats deeper than 30 m, highlighting possible constraints on coral reproduction at the deeper end of their range. Our results further revealed that an increase in seawater temperature over 1-2-day intervals during the breeding season correlated with the onset of reproductive activity along the depth gradient, leading to different reproductive periodicities in different depths. These differences suggest that differential temperature regimes and reproductive timing across depth may create intraspecific temporal reproductive segregation, possibly reducing connectivity among populations along a depth gradient. Moreover, we found high variability among years in both the timing of breeding activities and in the level of reproductive synchrony among corals from different depths. Overall, our study questions whether depth can provide a long-term and viable refuge for corals in the face of global environmental changes.
MeSH term(s)	Animals ; Anthozoa/physiology ; Coral Reefs ; Ecosystem ; Reproduction ; Seawater
Language	English
Publishing date	2022-07-07
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2010140-5
ISSN	1939-9170 ; 0012-9658
ISSN (online)	1939-9170
ISSN	0012-9658
DOI	10.1002/ecy.3760
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Article: Simulated climate change scenarios impact the reproduction and early life stages of a soft coral

Liberman, Ronen / Fine, Maoz / Benayahu, Yehuda

Marine environmental research. 2021 Jan., v. 163

2021

Abstract: Coral reefs are threatened worldwide by global climate change, manifested in anthropogenic ocean warming and acidification. Despite the importance of coral sexual reproduction for the continuity of coral reefs, our understanding of the extent of the ... ...

Abstract	Coral reefs are threatened worldwide by global climate change, manifested in anthropogenic ocean warming and acidification. Despite the importance of coral sexual reproduction for the continuity of coral reefs, our understanding of the extent of the impact of climate change on coral sexual reproduction, particularly on coral reproductive phenology and early life stages, is limited. Here, we experimentally examined the effects of predicted end-of-the-century seawater conditions on the sexual reproduction and photosynthetic capacity of a Red-Sea zooxanthellate octocoral, Rhytisma fulvum. Sexually mature colonies were exposed to ambient temperature and pH conditions and to Representative Concentration Pathway (RCP) conditions (4.5 and 8.5), five weeks prior to their expected surface-brooding event. The reproductive phenology of the colonies under the simulated seawater conditions was compared to that on the natural reef. In addition, subsequent planulae development and their metamorphosis into primary polyps under the same RCP conditions as their parent colonies were monitored in a running seawater system. The results reveal that both RCP conditions led to a change in the timing of onset of the surface-brooding event and its synchronicity. In contrast, the surface-brooding event under ambient conditions co-occurred with that of the in-situ reef colonies and maintained its synchrony. Similarly, planula survival and polyp metamorphosis rate were significantly reduced under both RCP conditions compared to propagules reared under ambient conditions. In addition, the photosynthetic capacity of the parent colonies under both RCPs showed a reduction relative to that under the ambient conditions in the experiment, suggesting a reduction in carbon fixation during the late stages of gametogenesis. While our findings indicate that octocoral reproductive phenology is affected by environmental changes, further work is required in order to elucidate the long-term implications for the R. fulvum population in the northern Red Sea.
Keywords	Rhytisma ; acidification ; ambient temperature ; carbon dioxide fixation ; corals ; gametogenesis ; metamorphosis ; pH ; phenology ; photosynthesis ; research ; seawater ; sexual maturity ; sexual reproduction ; Red Sea
Language	English
Dates of publication	2021-01
Publishing place	Elsevier Ltd
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	1502505-6
ISSN	1879-0291 ; 0141-1136
ISSN (online)	1879-0291
ISSN	0141-1136
DOI	10.1016/j.marenvres.2020.105215
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Overview of the genus Sympodium Ehrenberg, 1834 (Octocorallia, Alcyonacea, Xeniidae), with the description of new species, revealing regional endemism.

Benayahu, Yehuda / Ekins, Merrick / McFadden, Catherine S

Zootaxa

2021 Volume 5072, Issue 4, Page(s) 324–350

Abstract: The oldest existing type material for any of the xeniid soft corals, Sympodium caeruleum Ehrenberg, 1834, is re-described. An integrated analysis of molecular and morphological characters of Indo-Pacific Xeniidae support the description of seven new ... ...

Abstract	The oldest existing type material for any of the xeniid soft corals, Sympodium caeruleum Ehrenberg, 1834, is re-described. An integrated analysis of molecular and morphological characters of Indo-Pacific Xeniidae support the description of seven new species of that genus. The extent of interspecific morphological variation within the genus is extensive; colonies arise from an encrusting membrane of variable thickness that can be either mat-like or may have ribbon-like extensions or irregularly shaped low mounds. The polyps can either arise separately from the membrane or may be arranged into clusters of polyps that bud off at different levels to form small branched groups. The sclerites of all species are uniformly ellipsoid platelets, abundant throughout the colony. The genetic results suggest that Sympodium species demonstrate restricted geographic ranges and regional endemism, with distinct genotypes (molecular operational taxonomic units) each mostly found at a single Indo-Pacific location. The results emphasize the importance of integrating classical taxonomy with a re-examination of original old type material and molecular phylogenetic analyses, in order to delineate species boundaries and to recognize biodiversity patterns.
MeSH term(s)	Animals ; Anthozoa ; Biodiversity ; Phylogeny
Language	English
Publishing date	2021-12-01
Publishing country	New Zealand
Document type	Journal Article ; Review
ISSN	1175-5334
ISSN (online)	1175-5334
DOI	10.11646/zootaxa.5072.4.2
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Simulated climate change scenarios impact the reproduction and early life stages of a soft coral.

Liberman, Ronen / Fine, Maoz / Benayahu, Yehuda

Marine environmental research

2020 Volume 163, Page(s) 105215

Abstract	Coral reefs are threatened worldwide by global climate change, manifested in anthropogenic ocean warming and acidification. Despite the importance of coral sexual reproduction for the continuity of coral reefs, our understanding of the extent of the impact of climate change on coral sexual reproduction, particularly on coral reproductive phenology and early life stages, is limited. Here, we experimentally examined the effects of predicted end-of-the-century seawater conditions on the sexual reproduction and photosynthetic capacity of a Red-Sea zooxanthellate octocoral, Rhytisma fulvum. Sexually mature colonies were exposed to ambient temperature and pH conditions and to Representative Concentration Pathway (RCP) conditions (4.5 and 8.5), five weeks prior to their expected surface-brooding event. The reproductive phenology of the colonies under the simulated seawater conditions was compared to that on the natural reef. In addition, subsequent planulae development and their metamorphosis into primary polyps under the same RCP conditions as their parent colonies were monitored in a running seawater system. The results reveal that both RCP conditions led to a change in the timing of onset of the surface-brooding event and its synchronicity. In contrast, the surface-brooding event under ambient conditions co-occurred with that of the in-situ reef colonies and maintained its synchrony. Similarly, planula survival and polyp metamorphosis rate were significantly reduced under both RCP conditions compared to propagules reared under ambient conditions. In addition, the photosynthetic capacity of the parent colonies under both RCPs showed a reduction relative to that under the ambient conditions in the experiment, suggesting a reduction in carbon fixation during the late stages of gametogenesis. While our findings indicate that octocoral reproductive phenology is affected by environmental changes, further work is required in order to elucidate the long-term implications for the R. fulvum population in the northern Red Sea.
MeSH term(s)	Animals ; Anthozoa ; Climate Change ; Coral Reefs ; Indian Ocean ; Reproduction ; Seawater ; Temperature
Language	English
Publishing date	2020-11-24
Publishing country	England
Document type	Journal Article
ZDB-ID	1502505-6
ISSN	1879-0291 ; 0141-1136
ISSN (online)	1879-0291
ISSN	0141-1136
DOI	10.1016/j.marenvres.2020.105215
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