Habitat Influence on the Molecular, Carbon and Hydrogen Isotope Compositions of Leaf Wax n -Alkanes in a Subalpine Basin
- PDF / 434,407 Bytes
- 8 Pages / 595.22 x 842 pts (A4) Page_size
- 68 Downloads / 167 Views
IS SSN 1674-487X X
Habiitat Inflluence on o the Molecul M lar, Carrbon an nd Hydrrogen Isotop pe Com mpositioons of Leaf Wax x n-Alk kanes in n a Suba alpine Basin, Central Chinaa Ch haoyang Yan n
1, 2
, Yimin ng Zhang1, Yanzhen Ya Zhan ng1, Zhiqi Zh hang1, Xianyyu Huang *1, 2
1. State Key K Laboratory of o Biogeology and a Environmenntal Geology, China C Universitty of Geosciences, Wuhan 4300 078, China 2. Hubei Key Laboratory L of Critical C Zone Evvolution, School of Geographyy and Informatioon Engineering g, Chinaa University of Geosciences, Wuhan W 430078, China Chaaoyang Yan: htttps://orcid.org/00000-0003-2061-6040; Xiaanyu Huang: htttps://orcid.org/00000-0001-6175 5-9158 AB BSTRACT: Ep pidermal leaf waxes w of terresstrial higher plants have beeen widely utilizzed for the recconstrructions of paleoenvironmen nt and paleoclim mate in peat deposits. d In thiss study, specim mens of four pllant species growing in both peatlaand and non-peeatland habita ats were retrievved to comparee their molecu ular, carbon (δ13C) an nd hydrogen (δ δ2H) isotopic compositions c of o leaf wax n-aalkanes from a closed subalp pine baasin in Central China. Three of the four species show quiite higher totall concentration ns of n-alkaness in thee relatively drry non-peatlan nd setting than n in the peatlan nd. In addition n, the δ2H values of long-ch hain n-aalkanes are geenerally less deepleted in the peatland p and are a comparablee among differrent plant speccies, wh hich is interpreted as the inffluence of inun ndation condition and the poossible limited supply of pho otosyn nthetic produccts. This studyy reveals differrent patterns of o plant wax molecular m and iisotopic compo ositioons between peeatland and th he surroundingg non-peatland d conditions, and a confirms tthe paleoenvirronmeental potentiall of leaf wax raatios on the peaat sequences. KE EY WORDS: habitat, h n-alkaane, compound d specific carb bon isotope, coompound speciific hydrogen isoi top pe, peat deposiit. 0
INTRODU UCTION Leaves of higher terresttrial plants are covered with a wax layer, which can c prevent waater loss (Eglinnton and Halm miton, 1967). Leaf waaxes consist of long-chain l (>211 carbons) n-alkkanes, n-alkanoic aciids, and alcohools (Eglinton annd Halmiton, 19967). As they are reelatively resistaant to degradattion and easy to t be extracted and purified from sediments, s n-alkanes, in particcular, have been widdely utilized to reconstruct paleoenvironment and paleoclimate (Diefendorf ( andd Freimuth, 20017; Bush and McInerney, 2013; Sachse et al., 2012). A robuust interpretatioon of paleo informaation requires a thorough undderstanding of how environmentall factors affect the molecular, carbon, and hyydrogen isotope coompositions of leaf l wax n-alkaanes in living pllants. With thee merits of conntaining abunddant organic matter m (typically >300%) in immatuure conditions, peat deposits have been widely investigated foor lipid-based paleoenvironm mental reconstructionns (Naafs et al., a 2019; Huanng and Xie, 2016; 2 Chambers et al., 2012)
Data Loading...
