دورية أكاديمية
Peatland warming influences the abundance and distribution of branched tetraether lipids: Implications for temperature reconstruction.
| العنوان: | Peatland warming influences the abundance and distribution of branched tetraether lipids: Implications for temperature reconstruction. |
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| المؤلفون: | Ofiti NOE; Department of Geography, University of Zurich, Zurich, Switzerland; CEREEP-Ecotron Ile De France, ENS, CNRS, PSL Research University, Saint-Pierre-lès-Nemours, France. Electronic address: nicholas.ofiti@geo.uzh.ch., Huguet A; Sorbonne Université, CNRS, EPHE, PSL, UMR METIS, Paris, France., Hanson PJ; Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, USA., Wiesenberg GLB; Department of Geography, University of Zurich, Zurich, Switzerland. |
| المصدر: | The Science of the total environment [Sci Total Environ] 2024 May 10; Vol. 924, pp. 171666. Date of Electronic Publication: 2024 Mar 13. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Elsevier Country of Publication: Netherlands NLM ID: 0330500 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1026 (Electronic) Linking ISSN: 00489697 NLM ISO Abbreviation: Sci Total Environ Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Amsterdam, Elsevier. |
| مواضيع طبية MeSH: | Ecosystem* , Glycerol*, Temperature ; Bacteria ; Membrane Lipids ; Soil |
| مستخلص: | Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are bacterial membrane lipids whose distribution in peatland soils serves as an important proxy for past climate changes due to strong linear correlations with temperature in modern environments. However, commonly used brGDGT-based temperature models are characterized by high uncertainty (ca. 4 °C) and these calibrations can show implausible correlations when applied at an ecosystem level. This lack of accuracy is often attributed to our limited understanding of the exact mechanisms behind the relationship between brGDGTs and temperature and the potential effect of temperature-independent factors on brGDGT distribution. Here, we examine the abundance and distribution of brGDGTs in a boreal peatland after four years of in-situ warming (+0, +2.25, +4.5, +6.75 and +9 °C). We observed that with warming, concentrations of total brGDGTs increased. Furthermore, we determined a shift in brGDGT distribution in the surface aerobic layers of the acrotelm (0-30 cm depth), whereas no detectable change was observed at deeper anaerobic depths (>40 cm), possibly due to limited microbial activity. The response of brGDGTs to warming was also reflected by a strong increase in the methylation index of 5-methyl brGDGTs (MBT' Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.) |
| فهرسة مساهمة: | Keywords: Bacterial community; Branched GDGTs; Lipid biomarkers; Paleoclimate proxies; Peatland; Warming |
| المشرفين على المادة: | PDC6A3C0OX (Glycerol) 0 (Membrane Lipids) 0 (Soil) |
| تواريخ الأحداث: | Date Created: 20240315 Date Completed: 20240403 Latest Revision: 20240403 |
| رمز التحديث: | 20240403 |
| DOI: | 10.1016/j.scitotenv.2024.171666 |
| PMID: | 38490418 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1879-1026 |
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| DOI: | 10.1016/j.scitotenv.2024.171666 |