Association between luminous bacteria and Hydrozoa in the northern Ionian Sea

Gravili, Cinzia; Boero, Ferdinando; Alifano, Pietro; Stabili, Loredana

doi:10.1017/s0025315411001408

Cited by 5 publications

(4 citation statements)

References 28 publications

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“…The hydroid E. crocea represents a mosaic of microenvironments that can be colonized by several organisms, both eukaryotic and prokaryotic, that generally settle only on those portions covered by the exoskeleton [6] – [11] , [25] . Several hydroid species have been shown to live with an associated microbial flora [26] , but this is the first study dealing with the presence of bacteria on the hydroid's epidermis documented with a molecular approach combined with electron microscopy. Our molecular analyses revealed that most of the observed prokaryotic diversity was within the domain of Bacteria, whereas Archaea accounted for a negligible fraction.…”

Section: Discussionmentioning

confidence: 99%

Biodiversity of Prokaryotic Communities Associated with the Ectoderm of Ectopleura crocea (Cnidaria, Hydrozoa)

Camillo

Luna

et al. 2012

PLoS ONE

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The surface of many marine organisms is colonized by complex communities of microbes, yet our understanding of the diversity and role of host-associated microbes is still limited. We investigated the association between Ectopleura crocea (a colonial hydroid distributed worldwide in temperate waters) and prokaryotic assemblages colonizing the hydranth surface. We used, for the first time on a marine hydroid, a combination of electron and epifluorescence microscopy and 16S rDNA tag pyrosequencing to investigate the associated prokaryotic diversity. Dense assemblages of prokaryotes were associated with the hydrant surface. Two microbial morphotypes were observed: one horseshoe-shaped and one fusiform, worm-like. These prokaryotes were observed on the hydrozoan epidermis, but not in the portions covered by the perisarcal exoskeleton, and their abundance was higher in March while decreased in late spring. Molecular analyses showed that assemblages were dominated by Bacteria rather than Archaea. Bacterial assemblages were highly diversified, with up to 113 genera and 570 Operational Taxonomic Units (OTUs), many of which were rare and contributed to <0.4%. The two most abundant OTUs, likely corresponding to the two morphotypes present on the epidermis, were distantly related to Comamonadaceae (genus Delftia ) and to Flavobacteriaceae (genus Polaribacter ). Epibiontic bacteria were found on E. crocea from different geographic areas but not in other hydroid species in the same areas, suggesting that the host-microbe association is species-specific. This is the first detailed report of bacteria living on the hydrozoan epidermis, and indeed the first study reporting bacteria associated with the epithelium of E. crocea . Our results provide a starting point for future studies aiming at clarifying the role of this peculiar hydrozoan-bacterial association.

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Section: Discussionmentioning

confidence: 99%

Biodiversity of Prokaryotic Communities Associated with the Ectoderm of Ectopleura crocea (Cnidaria, Hydrozoa)

Camillo

Luna

et al. 2012

PLoS ONE

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“…Since the first identification of Porpita from Indian Ocean (Linnaeus, 1758), its occurrence was continuously reported from various localities in the Indo-Pacific Oceans [4,13,16,20,[26][27][28][29][30][31], Atlantic Ocean and the Mediterranean Sea [15,17,18,[32][33][34][35][36][37][38]. Globally, there are 64 documented occurrences for Porpita (Global Biodiversity Information Facility, GBIF).…”

Section: Figure2 Porpita Porpita From the Red Sea Of Hurghada Coast C...mentioning

confidence: 99%

“…Porpita is known to produce toxic substances which cause skin irritation [10,11] and also contain bioactive compounds having antimicrobial effect [12]. Although P. porpita is native to tropical and sub-tropical waters of the Pacific, Indian and Atlantic oceans and Mediterranean Sea [1,[13][14][15][16][17][18][19][20], its occurrence has not been reported from Red Sea. In general, the interest in documenting diversity of gelatinous zooplankton has not yet received proper attention in the Red Sea, and therefore, little is known about these important aquatic life forms.…”

Section: Introductionmentioning

confidence: 99%

First record of Porpita porpita (Linnaeus, 1758) (Cnidaria: Hydrozoa, Porpitidae) from the Red Sea of Egypt

Fadel Madkour,

Safwat Zaghloul,

Hussein Mohammad

2019

J Aquat Sci Mar Biol

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Although Porpita porpita is native to tropical and sub-tropical waters and widely occurred in the Atlantic and Indo-Pacific oceans and Mediterranean Sea, its occurrence has not been reported from Red Sea. Three specimens of P. porpita were collected in the middle littoral zone of the Egyptian Red Sea coast off Hurghada in December 2014. Specimens were fixed in 4% formaldehyde, and photographed under stereomicroscope for identification. The present study documented for the first time the occurrence of P. porpita in the Red Sea, and thus extends the geographical distribution of this genus.

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“…Notably, green fluorescent protein (GFP) was first isolated from the jellyfish Aequorea victoria (Shimomura 2005). Since then, fluorescence from a variety of sources has been documented in other hydrozoan taxa (Pugh and Haddock 2010, Gravili et al 2012, Maggioni et al 2020. Despite the history of fluorescence research in hydrozoans, it has yet to be systematically studied within the broad diversity of this animal group, and surprisingly little is known about the distribution and morphological variation of fluorescence in hydrozoans beyond selected genera or species.…”

Section: Introductionmentioning

confidence: 99%

Fluorescence patterns and diversity of hydrozoans from Bocas del Toro, Panama

Beckmann,

Vincent,

De León

et al. 2024

Cienc. Mar.

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Many metazoans contain molecules capable of fluorescence, the absorption and re-emission of light. Since the anatomical distribution, or patterning, of these molecules is variable across taxa, patterns of fluorescence may serve as a powerful diagnostic tool in taxonomy and ecology. However, species-specific fluorescence patterns among marine invertebrates are poorly understood. Here, we show that hydrozoans have diverse fluorescence patterns, which may result from molecules that are produced intrinsically or obtained from dietary sources. We surveyed hydrozoans including siphonophores, hydromedusae, and hydroids across 5 orders from pelagic and benthic marine environments in Bocas del Toro, Panama. Our findings show that fluorescence patterns are highly prevalent and may vary across hydrozoan species and throughout development. Most of the examined hydrozoan taxa exhibited some form of fluorescence, with variation observed between life stages and body parts. Fluorescence was documented in 88% of hydromedusae (Leptothecata, Anthoathecata, Limnomedusae and Narcomedusae), 50% of hydroid, and 75% of siphonophore taxa that were observed in this study. Our results illustrate how fluorescence patterns may serve as a useful diagnostic tool to explore marine biodiversity, highlighting the need for further documentation of fluorescence patterns across marine diversity and research into the molecules that underlie this phenomenon.

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Association between luminous bacteria and Hydrozoa in the northern Ionian Sea

Cited by 5 publications

References 28 publications

Biodiversity of Prokaryotic Communities Associated with the Ectoderm of Ectopleura crocea (Cnidaria, Hydrozoa)

Biodiversity of Prokaryotic Communities Associated with the Ectoderm of Ectopleura crocea (Cnidaria, Hydrozoa)

First record of Porpita porpita (Linnaeus, 1758) (Cnidaria: Hydrozoa, Porpitidae) from the Red Sea of Egypt

Fluorescence patterns and diversity of hydrozoans from Bocas del Toro, Panama

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