DOI: 10.1111/gbi.12093
Scopus记录号: 2-s2.0-84906088111
论文题名: The isotopic biosignatures of photo- vs. thiotrophic bivalves: Are they preserved in fossil shells?
作者: Dreier A. ; Loh W. ; Blumenberg M. ; Thiel V. ; Hause-Reitner D. ; Hoppert M.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2014
卷: 12, 期: 5 起始页码: 406
结束页码: 423
语种: 英语
Scopus关键词: bivalve
; carbon isotope
; fossil record
; isotopic composition
; lipid
; nitrogen isotope
; paleobiology
; photoautotrophy
; prokaryote
; shell
; symbiont
; Animalia
; Anodontia (bivalve)
; Bivalvia
; Codakia tigerina
; Fimbria (bivalve)
; Fimbria fimbriata
; Fragum fragum
; Fragum unedo
; Prokaryota
; Tapes dorsatus
; Trachycardium
; Tridacna maxima
; Vasticardium
; carbon
; lipid
; nitrogen
; sulfur
; animal
; animal shell
; bivalve
; chemistry
; fossil
; light
; metabolism
; species difference
; symbiosis
; Animal Shells
; Animals
; Bivalvia
; Carbon Isotopes
; Fossils
; Light
; Lipids
; Nitrogen Isotopes
; Species Specificity
; Sulfur
; Sulfur Isotopes
; Symbiosis
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences
; Environmental Science: General Environmental Science
; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: Symbiont-bearing and non-symbiotic marine bivalves were used as model organisms to establish biosignatures for the detection of distinctive symbioses in ancient bivalves. For this purpose, the isotopic composition of lipids (δ13C) and bulk organic shell matrix (δ13C, δ34S, δ15N) from shells of several thiotrophic, phototrophic, or non-symbiotic bivalves were compared (phototrophic: Fragum fragum, Fragum unedo, Tridacna maxima; thiotrophic: Codakia tigerina, Fimbria fimbriata, Anodontia sp.; non-symbiotic: Tapes dorsatus, Vasticardium vertebratum, Scutarcopagia sp.). {increment}13C values of bulk organic shell matrices, most likely representing mainly original shell protein/chitin biomass, were depleted in thio- and phototrophic bivalves compared to non-symbiotic bivalves. As the bulk organic shell matrix also showed a major depletion of δ15N (down to -2.2 ‰) for thiotrophic bivalves, combined δ13C and δ15N values are useful to differentiate between thio-, phototrophic, and non-symbiotic lifestyles. However, the use of these isotopic signatures for the study of ancient bivalves is limited by the preservation of the bulk organic shell matrix in fossils. Substantial alteration was clearly shown by detailed microscopic analyses of fossil (late Pleistocene) T. maxima and Trachycardium lacunosum shell, demonstrating a severe loss of quantity and quality of bulk organic shell matrix with time. Likewise, the composition and δ13C-values of lipids from empty shells indicated that a large part of these compounds derived from prokaryotic decomposers. The use of lipids from ancient shells for the reconstruction of the bivalve's life style therefore appears to be restricted. © 2014 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85179
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作者单位: Institute of Microbiology and Genetics, University of Goettingen, Goettingen, Germany; Courant Research Centre Geobiology, University of Goettingen, Goettingen, Germany; School of Biological Science, The University of Queensland, St Lucia, QLD, Australia; Federal Institute for Geosciences and Natural Resources, Hannover, Germany
Recommended Citation:
Dreier A.,Loh W.,Blumenberg M.,et al. The isotopic biosignatures of photo- vs. thiotrophic bivalves: Are they preserved in fossil shells?[J]. Geobiology,2014-01-01,12(5)