Lamellibrachia luymesi

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Lamellibrachia luymesi
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Annelida
Clade: Pleistoannelida
Clade: Sedentaria
Order: Sabellida
Family: Siboglinidae
Genus: Lamellibrachia
Species:
L. luymesi
Binomial name
Lamellibrachia luymesi

Lamellibrachia luymesi is a

cold seeps where hydrocarbons (oil and methane) are leaking out of the seafloor. It is entirely reliant on internal, sulfide-oxidizing bacterial
symbionts for its nutrition. These are located in a centrally located "trophosome".

Symbiotic vestimentiferan tubeworm Lamellibrachia luymesi from a cold seep at 550 m depth in the Gulf of Mexico: In the sediments around the base are orange bacterial mats of the sulfide-oxidizing bacteria Beggiatoa spp. and empty shells of various clams and snails, which are also common inhabitants of the seeps.[1]
Model of Lamellibrachia luymesi include advection and diffusion of sulfate, sulfide, methane, bicarbonate, and hydrogen ions, as well as organic carbon content of sediments.[2]

Lamellibrachia luymesi provides the bacteria with

Riftia pachyptila that live at hydrothermal vents, L. luymesi uses a posterior extension of its body called the root to take up hydrogen sulfide from the seep sediments. L. luymesi may also help fuel the generation of sulfide by excreting sulfate through their roots into the sediments below the aggregations.[2]

To support the carbon fixation they need for maintenance and growth, L. luymesi needs to extract sulfide, oxygen, and inorganic carbon from its environment and supply them to its symbionts in the trophosome via the vascular system. It also needs to ensure that no build up of the sulfate and hydrogen ion waste products occurs, which would inhibit the bacterial activity. Laboratory experiments have shown that although some of the waste products diffuse into the water column, about 85% of the sulfate produced and about 67% of the hydrogen ions are eliminated across the roots.[3]

The most well-known seeps where L. luymesi lives are in the northern Gulf of Mexico from 500 to 800 m depth. This tube worm can reach lengths over 3 m (10 ft), and grows very slowly, and its

molluscs, sponges, arthropoda, and chordates, many of which are found only at these seeps.[4]

References

This article incorporates a CC-BY-2.5 from references.[1][2]

  1. ^
    doi:10.1371/journal.pbio.0030102
  2. ^
    doi:10.1371/journal.pbio.0030077
  3. PMID 16985196.{{cite journal}}: CS1 maint: multiple names: authors list (link
    )
  4. ^ Alexia Barlikas, Asa Dewan, Mofolusho Sodeke (2011). "Lamellibrachia luymesi". Animal Diversity Web. Retrieved 28 June 2020.{{cite web}}: CS1 maint: multiple names: authors list (link)
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