Hydrothermal vent meiobenthos associated with mytilid mussel aggregations from the Mid-Atlantic Ridge and the East Pacific Rise

Zekely, Julia; Dover, Cindy Lee Van; Nemeschkal, H. L.; Bright, Monika

doi:10.1016/j.dsr.2006.05.010

Cited by 65 publications

(101 citation statements)

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“…Zekely et al (2006a) recorded dominance by nematodes in mussel bed samples from the Mid Atlantic Ridge, but dominance by copepods in samples from 11°N on the East Pacific Rise. Dinet et al (1988) examined the meiofauna from washings of vent macrofauna (vestimentiferans, alvinellid polychaetes and vesicomyid clams) from 21°N on the EPR, reporting a composition of 60% copepods and 35% nematodes, unlike the higher proportion of nematodes in the present study.…”

Section: Diversity and Abundance Of Mussel Bed Meiofaunamentioning

confidence: 99%

“…Animal Farm exhibited the highest overall dominance among SEPR sites, followed by Rehu Marka, Oasis and Buddha's Place ( Figure 5B). Zekely et al (2006a); North Fiji Basin records from Vanreusel et al (1997). Meiofauna of hydrothermal vent mussel beds J.T.P.…”

Section: Diversity and Rank Abundance Profiles Of Nematode Assemblagesmentioning

confidence: 99%

“…More recently, Zekely et al (2006a) have described the meiofauna of vent mussel beds at 11°N on the East Pacific Rise and 23°N on the Mid Atlantic Ridge. Overall diversity of meiofauna in these studies was lower than nonhydrothermal deep-sea areas and dominated by nematodes and copepods.…”

Section: Introductionmentioning

confidence: 99%

“…As these mussel beds can be quantitatively sampled with relative ease, they have provided ecological units for comparisons of macrofaunal assemblages between sites (Van Dover & Trask, 2000;Van Dover, 2002;Dorries & Van Dover, 2003;Turnipseed et al, 2003;Van Dover, 2003;Dreyer et al, 2005). Zekely et al (2006a) report nine species of nematode in mussel beds at 11°N on the EPR and seven species in a mussel bed on the Mid Atlantic Ridge (MAR), with no species but five genera in common between them. The meiofauna of vent mussel beds elsewhere on the northern and southern East Pacific Rise (NEPR and SEPR), however, have yet to be described and compared.…”

Section: Introductionmentioning

confidence: 99%

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Diversity of meiofauna and free-living nematodes in hydrothermal vent mussel beds on the northern and southern East Pacific Rise

et al. 2007

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The ecology and biogeography of meiofauna at deep-sea hydrothermal vents have historically received less attention than those of mega-and macrofauna. This study examines the composition of major meiofaunal taxa in beds of the mussel Bathymodiolus thermophilus at hydrothermal vents on the northern and southern East Pacific Rise (EPR) and presents the first comparison of species assemblages of the dominant taxon, the nematodes, among sites spanning 27 degrees of latitude. Meiofaunal samples were collected by submersible from three mussel beds at 9°N on the EPR and four mussel beds between 17 and 18°S in 1999. Estimated ages of the mussel beds at the time of sampling range from 4 to >20 years, enabling investigation of the influence of mussel bed age on meiofaunal assemblages. Overall, the meiofauna of the mussel beds was dominated by nematodes, with copepods constituting the second most abundant meiofaunal group. There was variation in the ratio of nematodes to copepods between sites, however, with copepods more abundant than nematodes in the youngest mussel beds. Apart from polychaete larvae, other meiofaunal groups were generally present at very low abundance (<1%) in the samples and restricted in diversity to gastropod larvae, acari, foraminifera, ostracoda and turbellaria. Seventeen nematode species from 14 genera and 11 families were found in the samples, with no evidence of endemicity to hydrothermal vents at the generic level. Four genera present were not previously recorded at hydrothermal vents. Nematode species richness, species:genus ratios and abundances were low compared with other deep-sea habitats, though the ecological relevance of comparisons with soft-sediment benthos is discussed. Nematode assemblages exhibited high dominance by a few species, with one species of Thalassomonhystera most abundant at five of the seven vent sites. Multivariate analysis of nematode assemblages reveals similarities among sites that do not match geographical proximity. The youngest mussel beds were most similar to each other and exhibited lower species richness than other sites, consistent with colonization of mussel bed habitat by nematodes over time. Similarity in the composition of nematode assemblages among sites separated by ∼3000 km indicates that they lie within a single biogeographic province, consistent with that proposed for mussel bed macrofauna. At a generic level, samples exhibited some overlap with nematode assemblages at vents elsewhere on the EPR, on the Mid Atlantic Ridge and in the North Fiji Basin.

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Section: Diversity and Abundance Of Mussel Bed Meiofaunamentioning

confidence: 99%

Section: Diversity and Rank Abundance Profiles Of Nematode Assemblagesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diversity of meiofauna and free-living nematodes in hydrothermal vent mussel beds on the northern and southern East Pacific Rise

et al. 2007

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“…In most cases, nematodes and copepods are the most abundant meiofaunal organisms (Vanreusel et al 2010;Zeppilli et al submitted). The nematodes identified in vents can belong to families and genera already known from non-vent habitats (Dinet et al 1988;Vanreusel et al 1997;Zekely et al 2006c;Sarrazin et al in press). In some hydrothermal vents such as at the North Fiji Basin (Vanreusel et al 1997) and IzuOgasawara Arc in the western North Pacific Ocean (Setoguchi et al 2014), none of the nematode species found in hydrothermal sediments occurred in the surrounding abyssal areas.…”

Section: Introductionmentioning

confidence: 99%

Rapid colonisation by nematodes on organic and inorganic substrata deployed at the deep-sea Lucky Strike hydrothermal vent field (Mid-Atlantic Ridge)

et al. 2015

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Despite the fragmented nature of hydrothermal vent (HV) fields, nascent vent sites are rapidly colonized by a pool of regional species. While succession of large animals at vents is relatively well established, we lack information on the associated meiofauna, in particular, on nematodes. The aim of the present study is to investigate the process of colonisation after 9 months of organic (wood and bone) and inorganic (slate) substrata by nematode assemblages deployed at the Eiffel Tower hydrothermal edifice on the Lucky Strike vent field on the Mid-Atlantic Ridge (MAR), at varying distances from visible hydrothermal activity. Abundance, biomass and diversity of colonising nematodes were compared with the results from an earlier similar two-year experiment. Near the vents, nematodes preferred inorganic substrata while in areas not influenced by vent activity, organic substrata were preferred. Nematode females dominated at almost all sites while numerous females at the ovigerous stage and juveniles were reported near the vent emissions, suggesting that nematode populations reproduce well after just 9 months. Our nine-month experiment on the MAR showed that the type of substratum influenced significantly the composition of colonising nematodes, while after two years, the community structure was instead influenced by hydrothermal activity.

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Hydrothermal Vents: Oases at Depth

Monaco¹,

Prouzet²

2015

Marine Ecosystems

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The deep ocean, often called the abyss, covers 66% of the planet. Schematically, it is the marine zone where there is not enough light to allow plants to grow. In fact, the lightened part of the ocean is shallow and does not exceed a few hundred meters; the rest of the ocean can reach much greater depths (11 km in the Mariana Trench) and is in complete darkness except for slight glows of bioluminescence. In the absence of local organic production, the organisms living at depth subsist due to organic matter produced in surface waters. This organic matter, in the form of decomposed matter, feces and molts, is clumped together by secretions from gelatinous organisms, sediments at depth and is degraded under the action of heterotrophic microbial communities, or is being recycled by pelagic organisms. Stratification of the water column, depth, surface production and seasonal variations as well as distance from continental shelves directly affect the flow of organic matter that reaches deep sediments. Generally speaking, the further we move away from the coast, the greater the depth, the lower the organic input and consequently, the lower the benthic biomass. Production in the abyssis approximately a hundredth of the primary production at the surface and benthic biomass expressed in fresh weight rarely exceeds 2 g/m 2. Only some populations of filter-feeding Chapter written by Jozée SARRAZIN and Daniel DESBRUYÈRES.

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Hydrothermal vent meiobenthos associated with mytilid mussel aggregations from the Mid-Atlantic Ridge and the East Pacific Rise

Cited by 65 publications

References 50 publications

Diversity of meiofauna and free-living nematodes in hydrothermal vent mussel beds on the northern and southern East Pacific Rise

Diversity of meiofauna and free-living nematodes in hydrothermal vent mussel beds on the northern and southern East Pacific Rise

Rapid colonisation by nematodes on organic and inorganic substrata deployed at the deep-sea Lucky Strike hydrothermal vent field (Mid-Atlantic Ridge)

Hydrothermal Vents: Oases at Depth

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