دورية أكاديمية
A sediment record of terrestrial organic matter inputs to Dongting Lake and its environmental significance from 1855 to 2019
| العنوان: | A sediment record of terrestrial organic matter inputs to Dongting Lake and its environmental significance from 1855 to 2019 |
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| المؤلفون: | Yanhua Wang, Yu Huang, Jiaming Tian, Chunhua Li, Kangkang Yu, Mingli Zhang, Xiulu Lang, Tian Sun |
| المصدر: | Ecological Indicators, Vol 130, Iss , Pp 108090- (2021) |
| بيانات النشر: | Elsevier, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Ecology |
| مصطلحات موضوعية: | Sediment, Biomarker, Organic carbon, Anthropogenic activities, Dongting Lake, Ecology, QH540-549.5 |
| الوصف: | The extensive anthropogenic activities and their potential impacts on lakes during the Anthropocene could be recorded in the sediments. In this study, the composition of biomarkers (i.e., n-alkanes and n-fatty acids), total organic carbon (TOC), and particle size in 210Pb-dated sediment cores from West Dongting Lake were investigated to trace the historical trend of anthropogenic inputs and their environmental significance. The TOC content was in the range of 3.15–27.32 mg g−1. The n-alkanes and n-fatty acids were distributed from C11–C33 and C12:0–C34:0, respectively. The short- and long-chain biomarkers accounted for a significant proportion of the total. Aquatic plants and algae living in West Dongting Lake were the main source (short-chain) followed by leaf waxes derived from terrestrial C3 plants (long-chain), as demonstrated by their concentrations. The variations of the key indicators i.e., the carbon preference index (CPI), aquatic plant n-alkane proxy (Paq), vascular plant n-alkane proxy (Pwax), and the ratio of unit short- to long-chain n-alkanes (L/H) also indicated that the aliphatic hydrocarbon fractions were mainly composed of short- and long-chain biomarkers. The sedimentary biomarkers had a significant temporal heterogeneity, which was controlled by different factors and sedimentary processes. Fine particles ( |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1470-160X 45472734 |
| العلاقة: | http://www.sciencedirect.com/science/article/pii/S1470160X2100755XTest; https://doaj.org/toc/1470-160XTest |
| DOI: | 10.1016/j.ecolind.2021.108090 |
| الوصول الحر: | https://doaj.org/article/c03da45472734d40b374be4a5758e05bTest |
| رقم الانضمام: | edsdoj.03da45472734d40b374be4a5758e05b |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 1470160X 45472734 |
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| DOI: | 10.1016/j.ecolind.2021.108090 |