Penguin population dynamics for the past 8500 years at Gardner Island, Vestfold Hills
Penguin population dynamics for the past 8500 years at Gardner Island, Vestfold Hills
复制标题
西福尔山加德纳岛过去 8500 年的企鹅种群动态
DOI：
10.1017/s0954102009990332
复制
发表时间：
2009-12-01
影响因子：
1.6
通讯作者：
Zhu, Renbin
中科院分区：
文献类型：
--
作者：
Huang, Tao;Sun, Liguang;Zhu, Renbin
为了重建企鹅种群的过去变化，我们对Vestfold Hills Gardner岛一个湖泊集水区的企鹅鸟源沉积物芯DG4进行了地球化学分析。通过对DG4中P、Se、F、S、As、Sr和Cu元素浓度的r聚类分析，并与基岩和新鲜企鹅粪中的元素浓度进行了比较，确定DG4中的生物元素组合为P、Se、F、S、As、Sr和Cu。通过对岩心中这些生物元素水平的因子分析，可以重建加德纳岛过去8500年来企鹅种群的变化。企鹅数量呈现显著波动，在距今4700-2400校准年之间达到最高密度。这与Vestfold Hills晚全新世温暖期的证据相吻合，类似于罗斯海和南极半岛地区记录的晚全新世企鹅最佳期。
Abstract In order to reconstruct past changes in penguin populations we performed geochemical analyses on a penguin ornithogenic sediment core DG4 retrieved from a lake catchment on Gardner Island, Vestfold Hills. P, Se, F, S, As, Sr and Cu in DG4 were identified as the bio-element assemblage by R-clustering analyses on the elemental concentrations and comparisons with those in bedrock and fresh penguin guano. Factor analysis on the levels of these bio-elements in the core permitted a reconstruction of variations in historical penguin populations at Gardner Island spanning the past 8500 years. The penguin population showed significant fluctuations, reaching its highest density between 4700–2400 calibrated years before present. This coincides with evidence for a late Holocene warm period in the Vestfold Hills, similar to that associated with the late Holocene penguin optimum recorded in the Ross Sea and Antarctic Peninsula regions.