Describing the ecological niche of Anthometra adriani (Crinoidea: Echinodermata) on the East Antarctic continental shelf  


Authors / CoAuthors

Hemery, L.G. | Ameziane, N. | Riddle, M.J. | Rintoul, S.R. | Beaman, R.J. | Post, A.L. | Eleaume, M.

Abstract

Crinoids, and especially comatulids as Anthometra adriani, are well represented among the macrofauna from the continental shelf offshore from Terre Adélie and George V Land, East Antarctica. These animals are suspension feeders that depend on the local current regime to feed. Nearly 500 specimens from this species were sampled during the Collaborative East Antarctic Marine Census (CEAMARC) expedition onboard the RV Aurora Australis (December 2007 to January 2008), from 46 of the 87 stations over a 400 km² area. Abiotic environmental factors (such as depth, temperature, salinity, oxygen) were measured at each site. The ecological niche of Anthometra adriani was described using Ecological Niche Factor Analysis (ENFA) and Mahalanobis Distances Factor Analysis (MADIFA). An Environmental Suitability Map (ESM) was developed for this species on the CEAMARC study area. The results show that A. adriani seems to prefer relatively cold and well-oxygenated waters in moderately deep areas. The ESM shows four optimal regions for this species: the eastern side of the George V Basin, the western part of the Mertz Bank, the southern side of the Adélie Bank, and the coastal area between the Astrolabe and Mertz Glaciers.

Product Type

nonGeographicDataset

eCat Id

70566

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EGD  

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Commonwealth of Australia (Geoscience Australia)  
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Keywords

  • External Publication
( Theme )
  • Antarctic data
( Theme )
  • abiotic surrogates
( Theme )
  • habitat
( Theme )
  • 3D model
Australian and New Zealand Standard Research Classification (ANZSRC)
  • Earth Sciences
  • Published_Internal

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2010-06-09T00:00:00

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geoscientificInformation

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