globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.14067
Scopus记录号: 2-s2.0-85042192264
论文题名:
Keep your feet warm? A cryptic refugium of trees linked to a geothermal spring in an ocean of glaciers
作者: Carcaillet C.; Latil J.-L.; Abou S.; Ali A.; Ghaleb B.; Magnin F.; Roiron P.; Aubert S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期:6
起始页码: 2476
结束页码: 2487
语种: 英语
英文关键词: ecosystem ; geothermal spring ; glacial refugia ; Lateglacial–Holocene climate ; mollusc ; nunatak ; palaeoecology ; tree
Scopus关键词: glacier ; Last Glacial Maximum ; mollusc ; paleoclimate ; paleoecology ; periglacial environment ; spring (hydrology) ; tree ; Betula ; Gastropoda ; Mollusca ; Poaceae ; Stylommatophora
英文摘要: Up to now, the most widely accepted idea of the periglacial environment is that of treeless ecosystems such as the arctic or the alpine tundra, also called the tabula rasa paradigm. However, several palaeoecological studies have recently challenged this idea, that is, treeless environments in periglacial areas where all organisms would have been exterminated near the glacier formed during the Last Glacial Maximum, notably in the Scandinavian mountains. In the Alps, the issue of glacial refugia of trees remains unanswered. Advances in glacier reconstructions show that ice domes did not cover all upper massifs, but glaciers filled valleys. Here, we used fossils of plant and malacofauna from a travertine formation located in a high mountain region to demonstrate that trees (Pinus, Betula) grew with grasses during the Lateglacial-Holocene transition, while the glacier fronts were 200–300 m lower. The geothermal travertine started to accumulate more than 14,500 years ago, but became progressively more meteogene about 11,500 years ago due to a change in groundwater circulation. With trees, land snails (gastropods) associated to woody or open habitats and aquatic mollusc were also present at the onset of the current interglacial, namely the Holocene. The geothermal spring, due to warm water and soil, probably favoured woody glacial ecosystems. This new finding of early tree growth, combined with other scattered proofs of the tree presence before 11,000 years ago in the western Alps, changes our view of the tree distribution in periglacial environments, supporting the notion of tree refugia on nunataks in an ocean of glaciers. Therefore, the tabula rasa paradigm must be revisited because it has important consequences on the global changes, including postglacial plant migrations and biogeochemical cycles. © 2018 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110394
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Laboratory for Ecology of Natural and Anthropised Hydrosystems (UMR 5023 CNRS), Université Lyon 1, Villeurbanne Cedex, France; Paris Sciences & Lettres University (PSL), Ecole Pratique des Hautes Etudes (EPHE), Paris, France; Le Maupas, Lazer, France; Institut des Sciences et de l'Evolution de Montpellier (UMR 5554), Université de Montpellier, Montpellier, France; GEOTOP, Université du Québec à Montréal, Montréal, QC, Canada; Mediterranean Institute for Marine and Terrestrial Biodiversity and Ecology (UMR 7263 CNRS), Aix-Marseille University, Aix-en-Provence, France; Station Alpine Joseph Fourier (UMS 3370 CNRS), Université Grenoble Alpes, Grenoble, France; Laboratoire d'Ecologie Alpine (UMR 5553 CNRS), Université Grenoble Alpes, Grenoble, France

Recommended Citation:
Carcaillet C.,Latil J.-L.,Abou S.,et al. Keep your feet warm? A cryptic refugium of trees linked to a geothermal spring in an ocean of glaciers[J]. Global Change Biology,2018-01-01,24(6)
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