An environmental baseline for food webs at deep-sea hydrothermal vents in Manus Basin (Papua New Guinea)

Audenhaege, Loïc Van; Fariñas-Bermejo, Andrea; Schultz, Thomas F.; Dover, Cindy Lee Van

doi:10.1016/j.dsr.2019.04.018

Cited by 23 publications

(28 citation statements)

References 61 publications

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“…Most of the δ 34 S values of the fauna analyzed were negative or close to 0‰, deviating from the heavy values (+15 to +20‰) typically observed in marine animals supported by a photosynthetic production [47]. Similar low δ 34 S values (-27.7 to +5‰) were reported in the vent fauna from the Ogasawara Arc and Mid-Okinawa Trough [43] and Manus Basin vents [17].…”

Section: Discussionmentioning

confidence: 49%

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Trophic structure of the macrofauna associated to deep-vents of the southern Gulf of California: Pescadero Basin and Pescadero Transform Fault

2019

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Newly discovered hydrothermal systems in the Pescadero Basin (PB) and the neighboring Pescadero Transform Fault (PTF) at the mouth of the Gulf of California disclosed a diverse macrofauna assemblage. The trophic structure of both ecosystems was assessed using carbon (δ13C), nitrogen (δ15N), and sulfur (δ34S) stable isotopes. The δ13C ranged from -40.8 to -12.1‰, revealing diverse carbon sources and its assimilation via Calvin-Benson-Bassham and the reductive tricarboxylic acid cycles. The δ15N values were between -12.5 and 18.3‰, corresponding to primary and secondary consumers. The δ34S values fluctuated from -36.2 to 15.1‰, indicating the sulfide assimilation of biogenic, magmatic, and photosynthetic sources. In PB high-temperature vents, primary consumers including symbiont-bearing, bacterivores and filter-feeders predominated. The secondary consumers within the scavengers/detritivores and predator guilds were scarce. The siboglinid Oasisia aff alvinae dominated the macrofauna assemblage at PB, but rather than playing a trophic role, it provides a substrate to vent dwellers. In PTF low-temperature vents, only symbiont-bearing primary consumers were analyzed, displaying the lowest δ34S values. This assemblage was dominated by the coexisting siboglinids Lamellibrachia barhami and Escarpia spicata. δ34S values allowed to distinguish between PB and PTF vent communities, to exclude the presence of methanotrophic organisms, and the detection of photosynthetic organic matter input.

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Section: Discussionmentioning

confidence: 49%

“…δ 15 N is used to estimate the trophic position of a consumer [15], as its values are typically enriched by 2–4‰ relative to their diet [16]. δ 34 S in the fauna is useful in distinguishing energy sources [14,17].…”

Section: Introductionmentioning

confidence: 99%

Trophic structure of the macrofauna associated to deep-vents of the southern Gulf of California: Pescadero Basin and Pescadero Transform Fault

2019

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“…It was approximately 9% to 10% divergent from the Japanese B. pettiboneae and also the Indian Ocean B. longqiensis ( Table 2). Five COI sequences available on GenBank, MK694794-799, and identified in [46] as B. pettiboneae from vents in the Manus Basin (Papua New Guinea), all fell within the clade identified here as Branchipolynoe tjiasmantoi n. sp. They were all at least 9% divergent from other GenBank B. pettiboneae sequences.…”

Section: Species Delimitation and Phylogenymentioning

confidence: 84%

“…Additional B. symmytilida COI sequences were sourced from Hurtado et al [24] and Plouviez et al [45]. Sequences referred to as B. pettiboneae (GenBank Accession ITS = KY753840, Mitochondrial = KY753825, MG799393, MK694794-799) were sourced from Zhang et al [3] and Van Audenhaege et al [46]. The sequences MK694794-799 are arguably not of B. pettiboneae and instead belong to one of the new species described here, B. tjiasmantoi n. sp.…”

Section: Phylogenetic Analysis and Species Delimitationmentioning

confidence: 98%

Phylogeny and Biogeography of Branchipolynoe (Polynoidae, Phyllodocida, Aciculata, Annelida), with Descriptions of Five New Species from Methane Seeps and Hydrothermal Vents

et al. 2019

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The four named species of Branchipolynoe all live symbiotically in mytilid mussels (Bathymodiolus) that occur at hydrothermal vents or methane seeps. Analyses using mitochondrial (COI and 16S) and nuclear (ITS) genes, as well as morphology, were conducted on a collection of Branchipolynoe from Pacific Costa Rican methane seeps and West Pacific hydrothermal vents. This revealed five new species of Branchipolynoe, and these are formally described. The new species from Costa Rica live in three species of Bathymodiolus mussels (also new) at depths ranging from 1000 to 1800 m. Branchipolynoe kajsae n. sp. and Branchipolynoe halliseyae n. sp. were found in all three undescribed Bathymodiolus species, while Branchipolynoe eliseae n. sp. was found in Bathymodiolus spp. 1 and 2, and Branchipolynoe meridae n. sp. was found in Bathymodiolus spp. 1 and 3. Hence, Bathymodiolus sp. 1 hosted all four of the new species, while the other two Bathymodiolus hosted three each. Most mussels contained only one specimen of Branchipolynoe; where there was more than one, these were often a female and smaller male of the same species. The newly discovered species from the West Pacific, Branchipolynoe tjiasmantoi n. sp., lives in unidentified Bathymodiolus at depths ranging from 674 to 2657 m from hydrothermal vents in the North Fiji (Fiji) and Lau Basins (Tonga) and also from New Zealand, Vanuatu, and the Manus Basin (Papua New Guinea). The phylogenetic and biogeographical implications of this diversity of Branchipolynoe are discussed.

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“…The red-blooded limpet Shinkailepas tollmanni (Beck, 1992) is one of the dominant vent endemic species in the Southwest Pacific. As a grazer on bacterial mats, it occurs as high densities on sulfide chimneys and on provannid shells at vent fields in 1,300–2,700 m depth in Manus, North Fiji and Lau Basins [ 19 – 22 ]. Taxonomically, this species was considered to represent the monotypic genus Olgasolaris Beck, 1992, but a recent phylogenetic study indicates its position among the species of Shinkailepas Okutani et al, 1989 and relegates the former genus to the synonymy of the latter, older genus [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Population connectivity of the hydrothermal-vent limpet Shinkailepas tollmanni in the Southwest Pacific (Gastropoda: Neritimorpha: Phenacolepadidae)

et al. 2020

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The Southwest Pacific represents an independent biogeographic province for deep-sea hydrothermal vent fauna. Different degrees of genetic connectivity among vent fields in Manus, North Fiji and Lau Basins have been reported for various molluscan and crustacean species, presumably reflecting their different levels of dispersal ability as swimming larvae. The present study investigates the population connectivity of the hydrothermal vent limpet Shinkailepas tollmanni (family Phenacolepadidae) in the Southwest Pacific. Our analyses using mitochondrial COI-gene sequences and shell morphometric traits suggest a panmictic population structure throughout its geographic and bathymetric ranges, spanning 4,000 km from the westernmost Manus Basin (151ºE; 1,300 m deep) to the easternmost Lau Basin (176ºE; 2,720 m). The measurements of its embryonic and larval shells demonstrate that the species hatches as a planktotrophic veliger larva with an embryonic shell diameter of 170-180 μm and settles at the vent environment with the larval shell diameter of 750-770 μm. This substantial growth as a feeding larva, ca. 80 times in volume, is comparable or even greater than those of confamilial species in the hydrothermal-vent and methane-seep environments in the Northwest Pacific and Atlantic Oceans. Large pigmented eyes in newly settled juveniles are another common feature in this and other phenacolepadids inhabiting the chemosynthetic environments. These results put together suggest that the larvae of S. tollmanni migrate vertically from deep-sea vents to surface waters to take advantages of richer food supplies and faster currents and stay pelagic for an extended period of time (> 1 year), as previously indicated for the confamilial species.

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An environmental baseline for food webs at deep-sea hydrothermal vents in Manus Basin (Papua New Guinea)

Cited by 23 publications

References 61 publications

Trophic structure of the macrofauna associated to deep-vents of the southern Gulf of California: Pescadero Basin and Pescadero Transform Fault

Trophic structure of the macrofauna associated to deep-vents of the southern Gulf of California: Pescadero Basin and Pescadero Transform Fault

Phylogeny and Biogeography of Branchipolynoe (Polynoidae, Phyllodocida, Aciculata, Annelida), with Descriptions of Five New Species from Methane Seeps and Hydrothermal Vents

Population connectivity of the hydrothermal-vent limpet Shinkailepas tollmanni in the Southwest Pacific (Gastropoda: Neritimorpha: Phenacolepadidae)

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