Rapid ecosystem response to abrupt climate changes during the last glacial period in western Europe, 40-16 ka

被引：91

作者：

Wohlfarth, Barbara ^{[1
]}

Veres, Daniel ^{[2
]}

Ampel, Linda ^{[3
]}

Lacourse, Terri ^{[4
]}

Blaauw, Maarten ^{[5
]}

Preusser, Frank ^{[6
]}

Andrieu-Ponel, Valerie ^{[7
]}

Keravis, Didier ^{[8
]}

Lallier-Verges, Elisabeth ^{[8
]}

Bjorck, Svante ^{[9
]}

Davies, Siwan M. ^{[10
]}

de Beaulieu, Jacques-Louis ^{[7
]}

Risberg, Jan ^{[3
]}

Hormes, Anne ^{[11
]}

Kasper, Haino Uwe ^{[12
]}

Possnert, Goran ^{[13
]}

Reille, Maurice ^{[7
]}

Thouveny, Nicolas ^{[14
]}

Zander, Anja ^{[15
]}

机构：

[1] Stockholm Univ, Dept Geol & Geochem, S-10691 Stockholm, Sweden

[2] Emil Racovita Speleol Inst, Cluj Napoca 400006, Romania

[3] Stockholm Univ, Dept Phys Geog & Quaternary Geol, S-10691 Stockholm, Sweden

[4] Univ Victoria, Dept Geog, Victoria, BC V8W 3R4, Canada

[5] Queens Univ Belfast, Dept Archaeol & Paleoecol, Belfast BT9 6AX, Antrim, North Ireland

[6] Univ Bern, Inst Geol, CH-3012 Bern, Switzerland

[7] Univ Aix Marseille 3, Inst Mediterraneen Ecol & Paleoecol, F-13545 Aix En Provence 04, France

[8] Univ Orleans, CNRS, Inst Sci Terre Orleans, F-45071 Orleans, France

[9] Lund Univ, Dept Geol, GeoBiosphere Ctr, S-22362 Lund, Sweden

[10] Univ Coll Swansea, Dept Geog, Swansea SA2 8PP, W Glam, Wales

[11] Univ Ctr Svalbard, N-9171 Longyearbyen, Norway

[12] Univ Cologne, Inst Geol, D-50674 Cologne, Germany

[13] Uppsala Univ, Angstrom Lab, S-75121 Uppsala, Sweden

[14] Univ Aix Marseille 3, CNRS, CEREGE, F-13545 Aix En Provence 04, France

[15] Univ Marburg, Fachbereich Geog, D-35037 Marburg, Germany

来源：

GEOLOGY | 2008年 / 36卷 / 05期

关键词：

lake sediments; paleoenvironmental reconstruction; multiproxy records; Dansgaard-Oeschger cycles; Heinrich events;

D O I：

10.1130/G24600A.1

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

We present a high-resolution and independently dated multiproxy lake sediment record from the paleolake at Les Echets in southeastern France that displays synchronous changes in independent limnic and terrestrial ecosystem proxies, in concert with millennial-scale climate oscillations during the last glacial period. Distinct lake-level fluctuations, low lake organic productivity, and open, treeless vegetation indicate cold and dry conditions in response to Heinrich events. Alternating phases of higher and low lake organic productivity, stratified surface waters and long-lasting lake ice cover, decreased or increased catchment erosion, and tree-dominated or herb-dominated vegetation resemble Dansgaard-Oeschger interstadial-stadial variability. Transitions between different ecological states occurred in as little as 40-230 yr and seem to have been controlled by the position of the Polar Front. Ecosystem response after 30 ka suggests that local climate conditions became more important. Our results demonstrate that all parts of the terrestrial system responded to the abrupt and dramatic climatic changes associated with Dansgaard-Oeschger and Heinrich events, and that regional factors modulated ecosystem response.

引用

页码：407 / 410

页数：4

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