DOI: 10.1016/j.quascirev.2018.04.007
Scopus记录号: 2-s2.0-85045740008
论文题名: Variability in δ13C values between individual Daphnia ephippia: Implications for palaeo-studies
作者: Schilder J. ; van Roij L. ; Reichart G.-J. ; Sluijs A. ; Heiri O.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 189 起始页码: 127
结束页码: 133
语种: 英语
英文关键词: Daphnia ephippia
; Europe
; Lakes
; Laser ablation
; Palaeolimnology
; Present
; Seasonality
; Stable carbon isotopes
; Stable isotopes
Scopus关键词: Ablation
; Algae
; Carbon
; Isotopes
; Lakes
; Methanation
; Methane
; Daphnia
; Europe
; Palaeolimnology
; Present
; Seasonality
; Stable carbon isotopes
; Stable isotopes
; Laser ablation
; carbon isotope
; concentration (composition)
; crustacean
; eggshell
; lake
; paleolimnology
; seasonality
; stable isotope
; algae
; Bryozoa
; Chironomidae
; Daphnia
; Daphnia ephippia
英文摘要: The stable carbon isotope ratio (δ13C value) of Daphnia spp. resting egg shells (ephippia) provides information on past changes in Daphnia diet. Measurements are typically performed on samples of ≥20 ephippia, which obscures the range of values associated with individual ephippia. Using a recently developed laser ablation-based technique, we perform multiple δ13C analyses on individual ephippia, which show a high degree of reproducibility (standard deviations 0.1–0.5‰). We further measured δ13C values of 13 ephippia from surface sediments of three Swiss lakes. In the well-oxygenated lake with low methane concentrations, δ13C values are close to values typical for algae (−31.4‰) and the range in values is relatively small (5.8‰). This variability is likely driven by seasonal (or inter-annual) variability in algae δ13C values. In two seasonally anoxic lakes with higher methane concentrations, average values were lower (−41.4 and −43.9‰, respectively) and the ranges much larger (10.7 and 20.0‰). We attribute this variability to seasonal variation in incorporation of methane-derived carbon. In one lake we identify two statistically distinct isotopic populations, which may reflect separate production peaks. The potentially large within-sample variability should be considered when interpreting small-amplitude, short-lived isotope excursions based on samples consisting of few ephippia. We show that measurements on single ephippia can be performed using laser ablation, which allows for refined assessments of past Daphnia diet and carbon cycling in lake food webs. Furthermore, our study provides a basis for similar measurements on other chitinous remains (e.g. from chironomids, bryozoans). © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112192
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Altenbergrain 21, Bern, 3013, Switzerland; Department of Biological and Environmental Science, University of Jyväskylä, PO Box 35, Jyväskylä, 40014, Finland; Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Princetonlaan 8a, Utrecht, CB 3584, Netherlands; Royal Netherlands Institute for Sea Research (NIOZ), Landsdiep 4, 1797 SZ 't Horntje (Texel), Netherlands
Recommended Citation:
Schilder J.,van Roij L.,Reichart G.-J.,et al. Variability in δ13C values between individual Daphnia ephippia: Implications for palaeo-studies[J]. Quaternary Science Reviews,2018-01-01,189