DOI: 10.1016/j.quascirev.2018.04.008
Scopus记录号: 2-s2.0-85046069224
论文题名: Flotsam samples can help explain the δ13C and δ15N values of invertebrate resting stages in lake sediment
作者: van Hardenbroek M. ; Rinta P. ; Wooller M.J. ; Schilder J. ; Stötter T. ; Heiri O.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 189 起始页码: 187
结束页码: 196
语种: 英语
英文关键词: Ephippia
; Flotsam
; Invertebrates
; Lakes
; Methane
; Sediment
; Stable isotopes
; Statoblasts
Scopus关键词: Animals
; Carbon
; Ecology
; Isotopes
; Methane
; Sediments
; Ephippia
; Flotsam
; Invertebrates
; Stable isotopes
; Statoblasts
; Lakes
; carbon isotope
; crustacean
; egg
; invertebrate
; isotopic composition
; isotopic ratio
; lacustrine deposit
; lake
; methane
; nitrogen isotope
; paleoenvironment
; phytoplankton
; reproductive biology
; resting stage
; stable isotope
; Bryozoa
; Cladocera
; Invertebrata
英文摘要: The stable isotopic composition of chitinous remains of Cladocera (water fleas) and freshwater Bryozoa (moss animals) preserved in lake sediment records can provide supporting insights into past environmental and ecosystem changes in lakes. Here we explore whether analyses of these remains isolated from lake flotsam can provide information on the driving variables affecting the isotopic composition of these remains. We collected flotsam in 53 lakes and found enough material in 33 lakes to measure the stable carbon and nitrogen isotope ratios (expressed as δ13C and δ15N values, respectively) of resting stages. These values were compared with lake characteristics, water chemistry measurements, and the isotopic composition of sedimentary organic matter (SOM) in the lakes. Mean δ13C values of cladoceran ephippia and SOM were correlated and both were also negatively correlated with deep water methane concentrations and indicators of lake stratification. This supports the findings of previous studies that methane-derived carbon can provide a significant proportion of carbon entering planktonic food webs. Mean δ15N values of bryozoan statoblasts and SOM were correlated, suggesting that both reflect the δ15N values of phytoplankton. Our results provide information on how environmental variables in lakes can influence the δ13C and δ15N values in resting stages, but flotsam samples can also potentially be used to assess seasonal stable isotope variability of resting stages. Both types of information are important to improve palaeoenvironmental interpretations of stable isotope records based on these remains in lake sediments. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112196
Appears in Collections: 气候减缓与适应
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作者单位: School of Geography Politics and Sociology, Newcastle University, Newcastle-upon-Tyne, NE1 7RU, United Kingdom; Oeschger Centre for Climate Change Research & Institute of Plant Sciences, University of Bern, Altenbergrain 21, Bern, CH-3013, Switzerland; Alaska Stable Isotope Facility, Water and Environmental Research Center, University of Alaska Fairbanks, Fairbanks, AK 99775, United States; College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Fairbanks, AK 99775, United States; Department of Biological and Environmental Science, University of Jyväskylä, PO Box 35, Jyväskylä, 40014, Finland
Recommended Citation:
van Hardenbroek M.,Rinta P.,Wooller M.J.,et al. Flotsam samples can help explain the δ13C and δ15N values of invertebrate resting stages in lake sediment[J]. Quaternary Science Reviews,2018-01-01,189