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Millennial mercury records derived from ornithogenic sediment on Dongdao Island,South China Sea

Journal of Environmental Sciences 2011年第9期23卷 1415-1423页

作者： Hong Yan Yuhong Wang Wenhan Cheng Liguang Sun Institute of Polar Environment University of Science and Technology of China Hefei 230026 China National Institutes of Health Bethesda MD 20892 USA

Two ornithogenic sediment cores,which have a time span of 1000 years and are influenced by red-footed booby （Sula sula）,were collected from Dongdao Islands,South China *** determined mercury concentrations of the two cores show similar and substantial fluctuations during the past millennium,and the fluctuations are most likely caused by the changes in mercury level of the ocean environment and in anthropogenic Hg *** the past 500 years,the mercury concentration in the red-footed booby excrement has a striking association with global anthropogenic mercury *** mercury concentration increased rapidly after AD 1600 in corresponding to beginning of the unparalleled gold and silver mining in South Central America that left a large volume of anthropogenic mercury *** the Industrial Revolution,the mercury level has increased at a fast pace,very likely caused by modern coal combustion,chlor-alkali and oil refining *** comparison of mercury profiles from different places on earth suggested that anthropogenic mercury pollution after the Industrial Revolution is more severe in Northern Hemisphere than in Antarctica.

关键词： South China Sea red-footed booby ornithogenic sediment mercury anthropogenic source

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Molecular organic geochemistry of ornithogenic sediment from Svalbard,Arctic

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Chinese Journal of Polar Science 2009年第1期20卷 32-39页

作者：汪建君孙立广 Institute of Polar Environment University of Science and Technology of China Key Laboratory of Global Change and Marine-Atmospheric Chemistry TIOSOA

The molecular biomarker compositions of the ornithogenic sediments （YN） , from Svalbard, Arctic were investigated. The results showed that n-alkanes had a bimodal pattern and their odd-even preference was not obvious. The alkanes contained unresolved complex mixtures （ UCM ） and relatively high levels of pristine and retene, indicating pollution from the nearby coal mines. The n-alkanols in the sediments had even-to-odd preference, and they might originate mainly from modern biota. Sistosterol, the main sterol in herbivores feces, was the dominant sterol, indicating that sitosterol might be a good biomarker of input from the birds feces in the sediments. The fatty acids of the sediments showed even-to-odd preference, and the main unsaturated fatty acid is C18：1 acid. The α-hydroxyl acids and ω-hydroxyl tatty acids were also detected in the sediments. In summary, the organic matters in the YN sediments were from the adjacent coal mines, bird feces, and plants.

关键词： Arctic ornithogenic sediment biomarkers sitosterol alkanols fatty acids.

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The identification and comparison of the bio-elements of the penguin ornithogenic sediments sample from Davis Station and Great Wall Station

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Chinese Journal of Polar Science 2008年第1期19卷 36-44页

作者：黄涛孙立广王玉宏朱仁斌 Institute of Polar Environment University of Science and Technology of China National Institute of Health

During CHINARE-22 in austral summer of 2005-2006, a lake sediment core named DG4, which is impacted by penguin droppings, was retrieved from a lake catchment in Gardner Island of Vestfold Hills, East Antarctica. In this study, the concentrations of characteristic elements in the core, local bedrocks and fresh penguin guanos were determined. P, Se, F, S, As, Sr and Cu in DG4 were identified as the bio-element assemblage by R-clustering analysis and compared with those in the local bedrocks and fresh guanos, the results are similar to Y2 in Ardley Island, Antarctic Peninsula. On this basis, P and Se were identified as the optimum bio-elements in DG4 and F, P and S were identified in Y2, respectively. This work will provides the foundation for reconstructing the past penguin populations in Gardner Island of Vest- fold Hills, East Antarctica and comparing the penguin population dynamics between East Antarctica and Antarctic Peninsula.

关键词： ornithogenic sediment bio-element environmental background pen-guin diet. Vestfold Hills. Antarctic Peninsula.

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Heavy metal distributions in the sediments of “Cattle Pond” on the Dongdao Island of South China Sea: Geochemical and statistical approaches for source tracing

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Acta Geochimica 2006年第S1期 97-97页

作者： Xiaodong LIU1, Liguang SUN1, Sanping ZHAO1, Xuebin YIN1, Zhouqing XIE1, Yuhong WANG2 1 Institute of Polar Environment, Hefei, Anhui Province, China 230026, China 2 National Institutes of Health, Maryland, USA 20892

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