Differentiating temperate tree species and their organs using lipid biomarkers in leaves,roots and soil |
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| Affiliation: | 1. Intercollege Graduate Degree Program in Ecology, The Pennsylvania State University, 101 Life Sciences Building, University Park, PA 16802, USA;2. Lamont-Doherty Earth Observatory, Columbia University, 210 Geoscience, 61 Route 9W, PO Box 1000, Palisades, NY 10964, USA;3. Institute of Dendrology, Polish Academy of Sciences, Parkowa 5, 62-035 Kórnik, Poland;4. Department of Geosciences, The Pennsylvania State University, 505 Deike Building, University Park, PA 16802, USA;1. Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, 156 Fitzpatrick Hall, Notre Dame, IN 46556, USA;2. School of the Earth, Ocean, and Environment, University of South Carolina, 701 Sumter St., Columbia, SC 29208, USA;1. Uni Research Climate, Bjerknes Centre for Climate Research, Jahnebakken 5, 5007 Bergen, Norway;2. Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Alten Hafen 26, 27568 Bremerhaven, Germany;3. Department of Geosciences (FB5), Klagenfurter Str. 4, University of Bremen, 28359 Bremen, Germany;1. Department of Geological Sciences, Stockholm University, 106 91 Stockholm, Sweden;2. Navarino Environmental Observatory (NEO), Navarino Dunes, Costa Navarino, 24001 Messenia, Greece;3. Bolin Centre for Climate Research, Stockholm University, 106 91 Stockholm, Sweden;4. Department of Physical Geography, Stockholm University, 106 91 Stockholm, Sweden;5. Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimiopolis, Zografou, Athens 15784, Greece;1. Université Poitiers, Institut de Chimie et des Milieux et Matériaux de Poitiers IC2MP CNRS UMR 7285, Equipe Eaux Géochimie, B27, 4 rue Michel Brunet, 86073 Poitiers Cedex 09, France;2. AREVA Mines, R&D Department, Tour AREVA, 1, Place Jean Millier, 92084 Paris La Défense Cedex, France;1. Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur, West Bengal 721 302, India;2. Department of Earth and Atmospheric Sciences and the Purdue Climate Change Research Center, Purdue University, West Lafayette 47907, USA;3. Department of Botany, Calcutta University, Kolkata 700 019, India |
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| Abstract: | Although fatty acids and alcohols in plant polyesters can be useful indicators of organic matter provenance in soils and sediments, interpretation is limited by uncertainty in: (i) the distribution of lipids among plant species and their organs (e.g. leaves and roots) and (ii) the extent to which plant lipid composition is recorded in soils and sediments. In this study, we compare lipids in leaves, roots and soils from 11 temperate tree species. Base hydrolysis was used to release ester-bound lipids and solvent extraction was then used to recover both hydrolysable and “free” lipids. Leaf and root lipid composition varied substantially among the tree species and we highlight differences among evergreen conifers, deciduous broadleaved angiosperms and a deciduous conifer (Larix decidua). Some of the variation appears to be linked to the morphology and lifespan of leaves and roots. Soils preserved much of the variation in the leaf and root lipid composition of the overlying tree species. Yet, the concentration of some lipids in soil diverged from their concentration in tree leaves and roots, reflecting an undocumented input from understory plants and other plant organs (e.g. seeds) or variation in the extent of lipid preservation in soil. Finally, by comparing leaf and root lipid composition, our results help constrain the attribution of lipids to each of these plant organs. This allowed us to evaluate the utility of leaf-derived lipids as plant type biomarkers and to document a substantial contribution of root-derived lipids to soil beneath all 11 tree species. |
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