DOI: 10.1016/j.palaeo.2016.01.008
论文题名: Decoding the oxygen isotope signal for seasonal growth patterns in Arctic bivalves
作者: Vihtakari M. ; Renaud P.E. ; Clarke L.J. ; Whitehouse M.J. ; Hop H. ; Carroll M.L. ; Ambrose W.G. ; Jr.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 446 起始页码: 263
结束页码: 283
语种: 英语
英文关键词: Ciliatocardium ciliatum
; Dynamic time warping
; Sclerochronology
; Secondary ion mass spectrometry
; Serripes groenlandicus
英文摘要: Chemical and physical variations in skeletal structures of marine organisms can reflect environmental variability, forming the basis for reconstructing the conditions in which the organism lived. The successful use of these bio-archives for reconstructing seasonal environmental conditions is dependent on understanding intra-annual growth patterns and timing of their deposition within skeletal structures. We studied intra-annual shell growth patterns, as well as the timing and environmental processes associated with winter growth line deposition in two circumpolar bivalve mollusks, Serripes groenlandicus and Ciliatocardium ciliatum. Shell growth deposited during a 1-year deployment on oceanographic moorings in Kongsfjorden and Rijpfjorden, Svalbard, was analyzed in situ for δ18O values using high spatial resolution secondary ion mass spectrometry (SIMS). A new digital method was developed to measure the location of SIMS spots along chronologically deposited shell material. Dynamic time warping algorithms were adapted to align SIMS-determined δ18O values with δ18O values predicted from continuous mooring instrument recordings of seawater temperature and salinity, in order to derive intra-annual shell growth models. The resulting growth models indicated that the prominent winter growth band was formed during a slow shell growth period lasting from December until May in Kongsfjorden and from November until mid-June in Rijpfjorden. The length of the slow growth period was most likely controlled by food availability. Shell growth rate during the growing season was significantly explained by temperature (marginal R2 = 0.29, p < 0.001) indicating that temperature partly drives shell growth rate when the food supply is sufficient. The insights into intra-annual shell growth of Arctic bivalves and the methods developed in our study are important contributions for further development of bivalve shells as proxy archives. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68556
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Arctic and Marine Biology, UiT The Arctic University of Norway, Tromsø, Norway; Norwegian Polar Institute, Fram Centre, Tromsø, Norway; Akvaplan-niva, Fram Centre, Tromsø, Norway; University Centre in Svalbard, Longyearbyen, Norway; School of Science and the Environment, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, United Kingdom; Department of Geosciences, Swedish Museum of Natural History, Stockholm, Sweden; Department of Biology, Bates College, Lewiston, ME, United States; Division of Polar Programs, National Science Foundation, Arlington, VA, United States
Recommended Citation:
Vihtakari M.,Renaud P.E.,Clarke L.J.,et al. Decoding the oxygen isotope signal for seasonal growth patterns in Arctic bivalves[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,446