Colonization of mid- and late-Holocene moraines by lichens and trees in the Magellanic sub-Antarctic province
Colonization of mid- and late-Holocene moraines by lichens and trees in the Magellanic sub-Antarctic province
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麦哲伦亚南极省中全新世中晚期冰碛地衣和树木的殖民化
DOI：
10.1007/s00300-017-2096-1
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发表时间：
2017
期刊：
影响因子：
1.7
通讯作者：
R. Villalba
中科院分区：
文献类型：
--
作者：
Irene A. Garibotti;R. Villalba
了解原生演替的过程是恢复和全球变化生态学的一个相关主题，并为地貌学中的经典测年方法（如地衣测量学和树木年代学）提供了基础。本研究的目的是调查殖民地衣和维管植物的两个前冰期的年代序列，包括晚全新世和中全新世时期在南美洲次南极次区域。我们使用这些信息来解决有关的问题，麦哲伦森林恢复后的干扰和地衣测量发展冰川退缩年表的适用性模式。高维管植物覆盖的状态的继承进展缓慢，一些冰碛仍然没有森林约2000年。我们的研究结果与以前的报告表明，成熟的森林状态的快速发展扰动地形，表明大的区域变化的过程中的继承。环境条件似乎有利于地衣在冰碛形成后立即定居。与世界其他地区相比，地衣的生长速度相对较高，但只有南极洲和亚南极岛屿的一半。生长率为Ringocarpon公羊。em.日Fr. subgen. Rumbercarpon group increased with lichen sizes up to ca. 50毫米和减少较大的菌体，导致一个S形地衣生长曲线，延长适用范围的地衣在过去的5700年在干燥的网站在麦哲伦省的次南极次区域。我们的研究结果表明，地衣测量是一种有效的技术，在多代理方法重建冰川波动，并同意在南极洲的早期研究表明，地衣的年增长率是一个敏感的属性为气候变化的生物监测。
Understanding the process of primary succession is a relevant topic in restoration and global change ecology, and provides the basis for classic dating methods in geomorphology, such as lichenometry and dendrochronology. The aim of this study is to investigate the colonization by lichens and vascular plants of two pro-glacial chronosequences encompassing the late- and mid-Holocene periods in the sub-Antarctic sub-region of South America. We use this information to address questions related to the pattern of Magellanic forests recovery after disturbance and the applicability of lichenometry for developing glacier retreat chronologies. Progression of succession to a state with high vascular plant cover was slow, and some moraines remained unforested for about 2000 years. Our results contrast with previous reports indicating a quick development of mature forest states on disturbed terrains, suggesting large regional variability on the course of succession. Environmental conditions seem propitious for lichens that colonize immediately after moraine formation. Lichens grow at relatively high rates in comparison to other world areas, but half as fast as in Antarctica and sub-Antarctic islands. Growth rates for the Rhizocarpon Ram. em. Th. Fr. sub-gen. Rhizocarpon group increase with lichen sizes up to ca. 50 mm and decrease in larger thalli, leading to a sigmoidal lichenometric growth curve that extends the applicable range of lichenometry to the last 5700 years in dry sites in the Magellanic province of the sub-Antarctic sub-region. Our results suggest that lichenometry is an effective technique in multi-proxy approaches for reconstructing glacier fluctuations, and agree with early studies in Antarctica suggesting that lichen annual growth rate is a sensitive attribute for the biomonitoring of climate changes.
南巴塔哥尼亚冰原拉戈阿根廷盆地的全新世冰川历史
影响因子：
4
作者：
Strelin, Jorge A.;Kaplan, Michael R.;Vandergoes, Marcus J.;Denton, George H.;Schaefer, Joerg M.
通讯作者：
Schaefer, Joerg M.
影响因子：
5.8
作者：
D. Douglass;B. Singer;M. Kaplan;R. P. Ackert;D. Mickelson;M. Caffee
通讯作者：
D. Douglass;B. Singer;M. Kaplan;R. P. Ackert;D. Mickelson;M. Caffee