Bacterial diversity in ornithogenic soils compared to mineral soils on King George Island, Antarctica |
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Authors: | Ok-Sun Kim Namyi Chae Hyun Soo Lim Ahnna Cho Jeong Hoon Kim Soon Gyu Hong Jeongsu Oh |
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Affiliation: | 1. Division of Polar Life Sciences, Korea Polar Research Institute, Incheon, 406-840, Republic of Korea 2. Division of Polar Climate Research, Korea Polar Research Institute, Incheon, 406-840, Republic of Korea 3. Civil & Environmental Engineering, Yonsei University, Seoul, 120-749, Republic of Korea 4. Department of Geological Sciences, Pusan National University, Busan, 609-735, Republic of Korea 5. Department of Environmental Science, Kangwon National University, Chuncheon, 200-701, Republic of Korea 6. Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology, Deajeon, 305-806, Republic of Korea
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Abstract: | In the Nar?bski Point area of King George Island of Antarctica, ornithogenic soils form on land under Chinstrap and Gentoo Penguin rookeries. The purpose of this study was to compare the bacterial community compositions in the gradient of contamination by penguin feces; mineral soil with no contamination, and soils with medium or high contamination. The discrimination between mineral soils and ornithogenic soils by characterization of physicochemical properties and bacterial communities was notable. Physicochemical analyses of soil properties showed enrichment of carbon and nitrogen in ornithogenic soils. Firmicutes were present abundantly in active ornithogenic soils, Bacteroidetes and Proteobacteria in a formerly active one, and several diverse phyla such as Proteobacteria, Actinobacteria, and Acidobacteria in mineral soils. Some predominant species belonging to the Firmicutes and Gammaproteobacteria may play an important role for the mineralization of nutrients in ornithogenic soils. Results of this study indicate that dominant species may play an important role in mineralization of nutrients in these ecosystems. |
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