Terrestrial Organic Matter Inputs to Nearshore Marine Sediment Under Prolonged Drought Followed by Significant Rainfall as Indicated by Lignin

被引：3

作者：

Lowman, Heili ^{[1
]}

Moingt, Matthieu ^{[2
]}

Lucotte, Marc ^{[2
]}

Melack, John ^{[1
]}

Page, Henry M. ^{[3
]}

机构：

[1] Univ Calif Santa Barbara, Dept Ecol Evolut & Marine Biol, Santa Barbara, CA 93106 USA

[2] Univ Quebec Montreal, Inst Sci Environm, GEOTOP, Montreal, PQ H3C 3P8, Canada

[3] Univ Calif Santa Barbara, Marine Sci Inst, Santa Barbara, CA 93106 USA

来源：

ESTUARIES AND COASTS | 2021年 / 44卷 / 08期

基金：

美国国家科学基金会;

关键词：

Lignin; Marine Sediment; Terrestrial Organic Matter; Storm; Degradation; Santa Barbara Channel; SURFACE SEDIMENTS; CONTINENTAL-SHELF; PLANT-TISSUES; CUO OXIDATION; CARBON; LAND; NUTRIENT; SYSTEMS; FLUXES; EXPORT;

D O I：

10.1007/s12237-021-00931-4

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Terrestrial organic matter (TOM) exported to nearshore marine regions may be altered by drought or large amounts of precipitation. We examined how significant precipitation in southern California during the winter seasons of 2015 and 2016, following a prolonged drought from 2011 to 2015, impacted the quantity and quality of TOM transported to nearshore kelp forests of the Santa Barbara Channel. Based on organic matter content, lignin oxidation by-products, and carbon isotopic signatures, biomarkers of TOM were detected in stream, estuarine, and marine sediments. Quantitative measures of lignin differentiated between the three environments. Qualitative lignin signatures revealed temporal patterns that appeared in stream, estuarine, and marine sediment. These patterns indicated that TOM delivered into nearshore coastal regions from mountain watersheds was less degraded over time and its source material changed through time. Our findings suggest lignin oxidation compounds can be used as biomarkers of TOM transported during storm events from coastal watersheds into nearshore marine sediment.

引用

页码：2159 / 2172

页数：14

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