globalchange  > 过去全球变化的重建
DOI: 10.1038/s41561-019-0349-z
WOS记录号: WOS:000469459600014
论文题名:
Substantial vegetation response to Early Jurassic global warming with impacts on oceanic anoxia
作者: Slater, Sam M.1; Twitchett, Richard J.2; Danise, Silvia3; Vajda, Vivi1
通讯作者: Slater, Sam M.
刊名: NATURE GEOSCIENCE
ISSN: 1752-0894
EISSN: 1752-0908
出版年: 2019
卷: 12, 期:6, 页码:462-+
语种: 英语
WOS关键词: OSMIUM ISOTOPE EVIDENCE ; MASS EXTINCTION ; TOARCIAN STAGE ; MARINE CARBONATE ; NORTH YORKSHIRE ; ORGANIC-MATTER ; EVENT ; SEDIMENTARY ; DURATION ; BASIN
WOS学科分类: Geosciences, Multidisciplinary
WOS研究方向: Geology
英文摘要:

Rapid global warming and oceanic oxygen deficiency during the Early Jurassic Toarcian Oceanic Anoxic Event at around 183 Ma is associated with a major turnover of marine biota linked to volcanic activity. The impact of the event on land-based ecosystems and the processes that led to oceanic anoxia remain poorly understood. Here we present analyses of spore-pollen assemblages from Pliensbachian-Toarcian rock samples that record marked changes on land during the Toarcian Oceanic Anoxic Event. Vegetation shifted from a high-diversity mixture of conifers, seed ferns, wet-adapted ferns and lycophytes to a low-diversity assemblage dominated by cheirolepid conifers, cycads and Cerebropollenites-producers, which were able to survive in warm, drought-like conditions. Despite the rapid recovery of floras after Toarcian global warming, the overall community composition remained notably different after the event. In shelf seas, eutrophication continued throughout the Toarcian event. This is reflected in the overwhelming dominance of algae, which contributed to reduced oxygen conditions and to a marked decline in dinoflagellates. The substantial initial vegetation response across the Pliensbachian/Toarcian boundary compared with the relatively minor marine response highlights that the impacts of the early stages of volcanogenic global warming were more severe for continental ecosystems than marine ecosystems.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/138976
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作者单位: 1.Swedish Museum Nat Hist, Dept Palaeobiol, Stockholm, Sweden
2.Nat Hist Museum, Dept Earth Sci, London, England
3.Univ Firenze, Dipartimento Sci Terra, Florence, Italy

Recommended Citation:
Slater, Sam M.,Twitchett, Richard J.,Danise, Silvia,et al. Substantial vegetation response to Early Jurassic global warming with impacts on oceanic anoxia[J]. NATURE GEOSCIENCE,2019-01-01,12(6):462-+
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