GEOCHEMISTRY OF PENGUIN ORNITHOGENIC SEDIMENT FROM BYERS PENINSULA, ANTARCTIC

doi:10.13679/j.jdyj.2014.2.201

Abstract

Abstract: Abstract Byers Peninsula, which is located at the western end of Livingston Island, is the largest ice-free area among South Shetland Islands. We collected a 55cm long sediment core (named P1) influenced by penguin droppings, and carried out deep analyses including the chemical element contents and isotopic geochemical characteristics for this sediment profile. According to the analysis on C/N, sources of organic matter, and δ15N in the sediment profile, we found that the organic matter in P1 sediments mainly originated from the input of penguin guano. Using enrichment factors, correlation analysis, PCA component analysis and other Statistical analysis methods, the P, F, Cu, Hg, As, S were identified to have the common source from the penguin droppings. The contents of these elements in the sediment profile of P1 have significant positive correlation with TOC and δ15N, reflecting that they were controlled by the relative change of penguin guano’s input level in the sediments. Our results were compared with the bio-element assemblage in the ornithogenic sediments from the Ardley Island around Great Wall Station, and the Gardner Island around Davis Station, East Antarctic, and we found that the bio-element assemblage of these three different areas are basically consistent, indicating that the biomarkers of elements in the penguin ornithogenic sediment might be almost identical throughout the entire Antarctic area, but there were also some slight differences, this may be related to the differences of bedrock and weathered soil background, the degree of weathering, as well as the types of penguin food. Our results provide the foundation for reconstructing the historical penguin population changes in this region and its possible response to climate change.

Key words: Byers Peninsula, Antarctic, penguin ornithogenic sediments, geochemistry, bio-element assemblage

Ma Xiaorong, Nie Yaguang, Liu Xiaodong, Sun Liguang. GEOCHEMISTRY OF PENGUIN ORNITHOGENIC SEDIMENT FROM BYERS PENINSULA, ANTARCTIC[J]. ADVANCES IN POLAR SCIENCE, 2014, 26(2): 201-211.

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