| Temperate bioerosion: ichnodiversity and biodiversity from intertidal to bathyal depths (Azores). | |
| | |
MedLine Citation:
|
PMID: 21992504 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
In the temperate Azores carbonate factory, a substantial fraction of the calcareous skeletal components is recycled by a remarkable biodiversity of biota producing bioerosion traces (incipient trace fossils). To study this biodiversity, experimental carbonate substrates were exposed to colonisation by epilithic and endolithic organisms along a bathymetrical gradient from 0 to 500 m depth, during 1 and 2 years of exposure. The overall bioerosion ichnodiversity is very high and comprises 56 ichnotaxa and ichnoforms attributed to cyanobacteria, chlorophytes, fungi, other micro-chemotrophs, macroborers, grazers and epilithic attachment scars. In the intertidal, hydrodynamic force, partial emersion and strong temperature fluctuations lead to the lowest ichnospecies richness. This contrasts with the highest ichnodiversity found at 15 m under the most favourable environmental conditions. Towards aphotic depths, a gradual depletion in ichnodiversity is observed, most probably because of the restricted light availability and a slowdown in ichnocoenosis development. Analysis of similarity (ANOSIM), in combination with non-metrical multidimensional scaling (NMDS), was used to highlight variability in the relative abundance of traces among depths, substrate orientations and exposure times. Ichnodiversity and abundance of traces decrease significantly with depth and are higher on up-facing versus down-facing substrates, whereas differences between years were not as pronounced. This study demonstrates that statistical methods of biodiversity analysis are not per se restricted to biotaxa but may well be applied also to ichnotaxa. In the analysis of trace fossil assemblages, this approach supports the recognition of diversity patterns and their relation to environmental gradients. |
| | |
Authors:
|
M Wisshak; A Tribollet; S Golubic; J Jakobsen; A Freiwald |
Related Documents
:
|
20575094 - Skeletal dysplasias: evaluation with impulse oscillometry and thoracoabdominal motion a... 17348524 - Physiological detection of interaural phase differences. 19275944 - Acoustically evoked potentials in two cephalopods inferred using the auditory brainstem... 3430414 - Electrolocation in the presence of jamming signals: electroreceptor physiology. 17928564 - Adaptation and information transmission in fly motion detection. 16811824 - The discriminative control of free-operant avoidance despite exposure to shock during t... |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Geobiology Volume: 9 ISSN: 1472-4669 ISO Abbreviation: Geobiology Publication Date: 2011 Nov |
Date Detail:
|
Created Date: 2011-10-13 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 101185472 Medline TA: Geobiology Country: England |
Other Details:
|
Languages: eng Pagination: 492-520 Citation Subset: IM |
Copyright Information:
|
© 2011 Blackwell Publishing Ltd. |
Affiliation:
|
Senckenberg am Meer, Abteilung Meeresforschung, Wilhelmshaven, Germany Institut de Recherche pour le Développement, UMR IPSL-LOCEAN, Bondy, France Department of Biology, Boston University, Boston, MA, USA Rebikoff-Niggeler Foundation, Faial, Azores, Portugal. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The Nature of Biopsies with "Borderline Rejection" and Prospects for Eliminating This Category.
Next Document: The N-acetyl-d-glucosamine repressor NagC of Vibrio fischeri facilitates colonization of Euprymna sc...