The History of Tree and Shrub Taxa on Bol'shoy Lyakhovsky Island (New Siberian Archipelago) since the Last Interglacial Uncovered by Sedimentary Ancient DNA and Pollen Data.
The History of Tree and Shrub Taxa on Bol'shoy Lyakhovsky Island (New Siberian Archipelago) since the Last Interglacial Uncovered by Sedimentary Ancient DNA and Pollen Data.
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DOI：
10.3390/genes8100273
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发表时间：
2017-10-13
期刊：
影响因子：
3.5
通讯作者：
Herzschuh U
中科院分区：
文献类型：
--
作者：
Zimmermann HH;Raschke E;Epp LS;Stoof-Leichsenring KR;Schirrmeister L;Schwamborn G;Herzschuh U
生态系统的边界，如北极-北半球的树线，与气候密切相关，在过去的冰川-间冰期循环中具有高度的空间动态性。只有少数研究涉及末次间冰期以来的植被变化，因为大多数以前的景观都被淹没，难以进入。利用花粉分析和沉积古DNA（sedaDNA）元条形码，我们揭示了植被变化的波尔绍伊Lyakhovsky岛自末次间冰期以来的冻土沉积。最后一个间冰期的样本描绘了高水平的植物多样性与树木（落叶松，云杉，杨）和灌木（赤杨，桦，茶藨子，山茱萸，水杨科）的存在，目前无树的岛屿。在末次盛冰期之后，落叶松重新在岛上定居，但与大多数灌木类群一起沿着消失。这可能是由于全新世海平面上升，导致岛上的海洋条件增加。此外，我们应用了两个新开发的落叶松特有的叶绿体标记，以评估其潜在的跟踪过去的人口动态从环境样品。新的标记成功地重新测序，并表现出两个变种，每个标记在末次间冰期样品。SedaDNA可以跟踪植被变化以及地理空间随时间的遗传变化，并可以提高我们对塑造现代模式的过去过程的理解。
Ecosystem boundaries, such as the Arctic-Boreal treeline, are strongly coupled with climate and were spatially highly dynamic during past glacial-interglacial cycles. Only a few studies cover vegetation changes since the last interglacial, as most of the former landscapes are inundated and difficult to access. Using pollen analysis and sedimentary ancient DNA (sedaDNA) metabarcoding, we reveal vegetation changes on Bol’shoy Lyakhovsky Island since the last interglacial from permafrost sediments. Last interglacial samples depict high levels of floral diversity with the presence of trees (Larix, Picea, Populus) and shrubs (Alnus, Betula, Ribes, Cornus, Saliceae) on the currently treeless island. After the Last Glacial Maximum, Larix re-colonised the island but disappeared along with most shrub taxa. This was probably caused by Holocene sea-level rise, which led to increased oceanic conditions on the island. Additionally, we applied two newly developed larch-specific chloroplast markers to evaluate their potential for tracking past population dynamics from environmental samples. The novel markers were successfully re-sequenced and exhibited two variants of each marker in last interglacial samples. SedaDNA can track vegetation changes as well as genetic changes across geographic space through time and can improve our understanding of past processes that shape modern patterns.
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影响因子：
7.7
作者：
Boyer, Frederic;Mercier, Celine;Coissac, Eric
通讯作者：
Coissac, Eric
北极西伯利亚新西伯利亚群岛 Bol'shoy Lyakhovsky 岛 Weichselian 和全新世古环境史
影响因子：
2.2
作者：
Andreev, Andrei A.;Grosse, Guido;Kunitsky, Viktor V.
通讯作者：
Kunitsky, Viktor V.
影响因子：
2.2
作者：
Andreev, AA;Grosse, G;Kunitsky, VV
通讯作者：
Kunitsky, VV
影响因子：
4
作者：
Andreev, Andrei A.;Schirrmeister, Lutz;Hubberten, Hans-Wolfgang
通讯作者：
Hubberten, Hans-Wolfgang
影响因子：
64.8
作者：
Andersen, KK;Azuma, N;White, JWC
通讯作者：
White, JWC