Eco-environmental implications of elemental and carbon isotope distributions in ornithogenic sediments from the Ross Sea region, Antarctica
Eco-environmental implications of elemental and carbon isotope distributions in ornithogenic sediments from the Ross Sea region, Antarctica
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南极洲罗斯海地区鸟类沉积物中元素和碳同位素分布的生态环境影响
DOI：
10.1016/j.gca.2013.04.013
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发表时间：
2013-09
影响因子：
5
通讯作者：
Steven D Emslie
中科院分区：
文献类型：
--
作者：
Xiaodong Liu;Yaguang Nie;Liguang Sun;Steven D Emslie
海鸟对元素的地球化学循环有很大的影响，是它们觅食区域和群落之间物质交换的纽带。在这项研究中，我们研究了五个受企鹅影响的沉积物剖面的元素和碳同位素组成，这些剖面来自南极罗斯海地区的罗斯岛和博福特岛。在沉积物的三种主要成分(包括风化基岩、鸟粪和藻类)中，鸟粪是有机质和营养物质的主要来源，导致每个沉积物剖面中几种元素的选择性富集。通过统计分析，并与当地风化基岩、新鲜鸟粪、新鲜藻类等端元环境介质进行对比，确定22种元素中As、Cd、Cu、P、S、Se、Zn为罗斯海地区的企鹅生物元素。造鸟沉积物的碳同位素组成显示出鸟粪和藻类的混合特征。使用二元同位素混合方程，我们能够重建鸟粪输入和藻类生物量的历史变化。与南极、北极和南海中国海其他地区的研究相比，我们发现鸟类的生物元素As、Cd、Cu、P、Se和Zn有明显的重叠。了解全球范围内海鸟粪中生物元素的组成和行为，以及生物载体在陆地和海洋之间的地球化学循环中所起的作用，将有助于未来鸟类生态和古气候重建的研究。
Seabirds have substantial influence on geochemical circulation of elements, serving as a link for substance exchange between their foraging area and colonies. In this study, we investigated the elemental and carbon isotopic composition of five penguin-affected sediment profiles excavated from Ross Island and Beaufort Island in the Ross Sea region, Antarctica. Among the three main constituents of the sediments (including weathered bedrock, guano and algae), guano was the main source of organic matter and nutrients, causing selective enrichment of several elements in each of the sediment profiles. In the 22 measured elements, As, Cd, Cu, P, S, Se and Zn were identified as penguin bio-elements in the Ross Sea region through statistical analysis and comparison with local end-member environmental media such as weathered bedrock, fresh guano and fresh algae. Carbon isotopic composition in the ornithogenic sediments showed a mixing feature of guano and algae. Using a two-member isotope mixing equation, we were able to reconstruct the historical change of guano input and algal bio-mass. Compared with research in other parts of Antarctic, Arctic, and South China Sea, we found apparent overlap of avian bio-elements including As, Cd, Cu, P, Se, and Zn. Information on the composition and behavior of bio-elements in seabird guano on a global scale, and the role that bio-vectors play in the geochemical circulation between land and sea, will facilitate future research on avian ecology and paleoclimatic reconstruction.
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影响因子：
1.7
作者：
T. Speir;D. J. Ross
通讯作者：
T. Speir;D. J. Ross
西福尔山加德纳岛过去 8500 年的企鹅种群动态
影响因子：
1.6
作者：
Huang, Tao;Sun, Liguang;Zhu, Renbin
通讯作者：
Zhu, Renbin
影响因子：
5
作者：
J. Bishop;A. Lougear;J. Newton;P. Doran;H. Froeschl;A. Trautwein;W. Körner;C. Koeberl
通讯作者：
J. Bishop;A. Lougear;J. Newton;P. Doran;H. Froeschl;A. Trautwein;W. Körner;C. Koeberl
南海东岛湖相沉积物重金属分布及溯源
影响因子：
3.3
作者：
Liu Xiaodong;Yin Xuebin;Wang Yuhong;Sun Liguang
通讯作者：
Sun Liguang
影响因子：
3.5
作者：
P. Scholle;M. Arthur
通讯作者：
P. Scholle;M. Arthur