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Macroinvertebrate groups found on deep-sea volcanic habitats in the Galapagos Marine Reserve in the Eastern Tropical Pacific Ocean: Porifera

Citation

Buglass S, Marsh L (2019): Macroinvertebrate groups found on deep-sea volcanic habitats in the Galapagos Marine Reserve in the Eastern Tropical Pacific Ocean: Porifera. v1.2. Charles Darwin Research Station. Dataset/Occurrence. http://ipt.iobis.org/obis-deepsea/resource?r=porifera_galapagos&v=1.2 https://doi.org/10.15468/93qy9n accessed via GBIF.org on 2022-05-28.

Description

Macroinvertebrate groups found on deep-sea volcanic habitats in the Galapagos Marine Reserve in the Eastern Tropical Pacific Ocean: Porifera

Sampling Description

Study Extent

In June 2015, the EV Nautilus conducted a 10-day collaborative research expedition (NA064) between the Ocean Exploration Trust (OET), the Charles Darwin Foundation (CDF), and the Galapagos National Park Directorate (GNPD) to explore the deep-sea environments of the GMR. All methods were carried out in accordance with relevant guidelines and regulations by the GNPD under research permits PC-26-15 & PC-45-15. All experimental protocols were reviewed and approved by a GNPD’s committee that evaluates animal care during research activities. We conducted a total of six exploratory dives to the north, west, and central part of the Galapagos archipelago.

Sampling

ROV dives began at the base of each feature, and conducted a general upslope transect, following sonar and visual surveys along this transect. Dives H1435, H1436, and H1440 explored three seamounts around the most northern islands of the archipelago, which are part of the Wolf-Darwin volcanic lineament that extends to the Galapagos Spreading Center (Harpp and Geist 2002). All seamounts located in this area are conically shaped with small summit craters and relatively flat tops. These are also the youngest seamounts of the Galapagos platform estimated to be less than 1 million years old (Sinton et al. 1996; Harpp and Geist 2002). The deepest ROV transects were conducted during dives H1441 and H1442, which targeted the lava flows and abyssal plains to the west of Fernandina Island. These lava flows are part of the hotspot found beneath the island where the largest and most active volcano of the Galapagos platform is located (Sinton et al. 1996). The final dive, H1443, explored two small conically-shaped shallow seamounts located in the central part of the Archipelago, between the islands of Santiago, Isabela, and Santa Cruz. Seamounts from this part of the platform were once centred over the hotspot and are estimated to be between 5 to 6 million years old (Sinton et al. 1996; Harpp and Geist 2002).

Method steps

  1. Each ROV dive ranged in duration from 11 to 18 hours. For the subsequent review of supposed morphospecies, each dive was split into 2-hour segments. In situ images of organisms were captured and extracted from video transects analyses using VLC software (Version 3.0.4) by “non-expert analysts”. To avoid reviewer bias in capturing unique morphospecies, “non-expert analysts” were assigned random video segments from all 6 ROV dives. Only organisms that appear to be larger than 3 cm were captured and considered for further identification. All images were then tentatively classified under their common names (i.e. squat lobsters, crabs, shrimps, etc.) and only images that appeared in sufficient detail to be determined beyond phyla were sent to taxonomic experts for further identification. The Open nomenclature identification qualifiers used are modified from Sigovini et al. (2016).

Taxonomic Coverages

This dataset focuses on deep-sea arthropods found from 400 to 3400 m of depth within the Galapagos Marine Reserve.
  1. Porifera
    common name: Sponge rank: phylum
  2. Hexactinellida
    rank: class
  3. Demospongiae
    rank: class
  4. Lyssacinosida
    rank: order
  5. Sceptrulophora
    rank: order
  6. Poecilosclerida
    rank: order
  7. Haplosclerida
    rank: order
  8. Tetractinellida
    rank: order
  9. Amphidiscosida
    rank: order
  10. Euplectellidae
    rank: family
  11. Rossellidae
    rank: family
  12. Farreidae
    rank: family
  13. Cladorhizidae
    rank: family
  14. Niphatidae
    rank: family
  15. Phellodermidae
    rank: family
  16. Vulcanellidae
    rank: family
  17. Hyalonematidae
    rank: family
  18. Myxillidae
    rank: family
  19. Tretodictyidae
    rank: family
  20. Uncinateridae
  21. Dictyaulus
    rank: genus
  22. Pachychalina
    rank: genus
  23. Saccocalyx
    rank: genus
  24. Regadrella
    rank: genus
  25. Tretodictyum
    rank: genus
  26. Poecillastra
    rank: genus
  27. Lophocalyx
    rank: genus
  28. Hyalonema
    rank: genus
  29. Caulophacus
    rank: genus
  30. Corynonema
    rank: genus
  31. Chonelasma
    rank: genus

Geographic Coverages

This dataset focuses on deep-sea species found in the Galapagos Marine Reserve, which covers ~ 138,000 km2 and was established in 1998 to protect the archipelago’s marine biodiversity by banning large-scale commercial exploitation of marine resources (Henry et al., 2017).

Bibliographic Citations

Contacts

Salome Buglass
originator
position: Ecologist
Charles Darwin Research Station
Av. Charles Darwin
Pto. Ayora
200350
Galapagos
EC
Telephone: (593) 5 2526-146/2527-013
email: salome.buglass@fcdarwin.org.ec
homepage: https://www.darwinfoundation.org/en/
userId: http://www.researcherid.com/rid/Salome Buglass
Leigh Marsh
originator
position: Deep-Sea Ecologist
Charles Darwin Research Station
Av. Charles Darwin
Pto. Ayora
200350
Galapagos
EC
Telephone: (593) 5 2526-146/2527-013
email: leigh.marsh@fcdarwin.org.ec
homepage: https://www.darwinfoundation.org/en/
userId: http://www.researcherid.com/rid/Leigh Marsh
Salome Buglass
metadata author
position: Ecologist
Charles Darwin Research Station
Av. Charles Darwin
Pto. Ayora
200350
Galapagos
EC
Telephone: (593) 5 2526-146/2527-013
email: salome.buglass@fcdarwin.org.ec
homepage: https://www.darwinfoundation.org/en/
userId: http://www.researcherid.com/rid/Salome Buglass
Leigh Marsh
metadata author
position: Deep-Sea Ecologist
Charles Darwin Research Station
Av. Charles Darwin
Pto. Ayora
200350
Galapagos
EC
Telephone: (593) 5 2526-146/2527-013
email: leigh.marsh@fcdarwin.org.ec
homepage: https://www.darwinfoundation.org/en/
userId: http://www.researcherid.com/rid/Leigh Marsh
Shannon Nagy
metadata author
position: Seamounts Project
Charles Darwin Research Station
Av. Charles Darwin
Pto. Ayora
200350
Galapagos
EC
Telephone: (593) 5 2526-146/2527-013
email: shannon.nagy@outlook.com
homepage: https://www.darwinfoundation.org/en/
userId: https://www.linkedin.com/profile/view?id=shannonlukenagy
Camila Arnés-Urgellés
metadata author
position: Seamounts Project
Charles Darwin Research Station
Av. Charles Darwin
Pto. Ayora
200350
Galapagos
EC
Telephone: (593) 5 2526-146/2527-013
email: camila.arnes@fcdarwin.org.ec
homepage: https://www.darwinfoundation.org/en/
userId: http://orcid.org/000-0001-7756-7564
Salome Buglass
originator
position: Ecologist
Charles Darwin Research Station
Av. Charles Darwin
Pto. Ayora
200350
Galapagos
EC
Telephone: (593) 5 2526-146/2527-013
email: salome.buglass@fcdarwin.org.ec
homepage: https://www.darwinfoundation.org/en/
userId: http://www.researcherid.com/rid/Salome Buglass
Leigh Marsh
principal investigator
position: Deep-Sea Ecologist
Charles Darwin Research Station
Av. Charles Darwin
Pto. Ayora
200350
Galapagos
EC
Telephone: (593) 5 2526-146/2527-013
email: leigh.marsh@fcdarwin.org.ec
homepage: https://www.darwinfoundation.org/en/
userId: http://www.researcherid.com/rid/Leigh Marsh
Shannon Nagy
administrative point of contact
position: Seamounts Project
Charles Darwin Research Station
Av. Charles Darwin
Pto. Ayora
200350
Galapagos
EC
Telephone: (593) 5 2526-146/2527-013
email: shannon.nagy@outlook.com
homepage: https://www.darwinfoundation.org/en/
userId: https://www.linkedin.com/profile/view?id=shannonlukenagy
Camila Arnés-Urgellés
administrative point of contact
position: Seamounts Project
Charles Darwin Research Station
Av. Charles Darwin
Pto. Ayora
200350
Galapagos
EC
Telephone: (593) 5 2526-146/2527-013
email: camila.arnes@fcdarwin.org.ec
homepage: https://www.darwinfoundation.org/en/
userId: http://orcid.org/000-0001-7756-7564
Salome Buglass
administrative point of contact
position: Ecologist
Charles Darwin Research Station
Av. Charles Darwin
Pto. Ayora
200350
Galapagos
EC
Telephone: (593) 5 2526-146/2527-013
email: salome.buglass@fcdarwin.org.ec
homepage: https://www.darwinfoundation.org/en/
userId: http://www.researcherid.com/rid/Salome Buglass
Leigh Marsh
administrative point of contact
position: Deep-sea Ecologist
Charles Darwin Research Station
Av. Charles Darwin
Pto. Ayora
200350
Galapagos
EC
Telephone: (593) 5 2526-146/2527-013
email: leigh.marsh@fcdarwin.org.ec
homepage: https://www.darwinfoundation.org/en/
userId: http://www.researcherid.com/rid/Leigh Marsh
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