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Articles by Lars Wörmer
Contrasting drivers of South Asian summer and winter monsoon evolution during the last deglaciation
Abstract Reconstructing past South Asian monsoon dynamics, which governs wind and rainfall patterns across the Indian subcontinent, is crucial for understanding low-latitude climate. Constraining monsoon drivers requires separating summer and winter components in palaeoclimate archives, but this remains challenging because proxy signals usually integrate seasonal signals.
Millimetre‐Scale Stratification of Microbial Communities in Hydrothermal Sediments
1 Introduction Hydrothermal sediments are highly dynamic systems, shaped by intense fluid flow and steep physicochemical gradients unfolding on millimetre scales (Teske et al. 2016; Gundersen et al. 1992; Winkel et al. 2014). Together, these conditions create a complex biogeochemical habitat that supports diverse microbial populations and fosters the development of distinct ecological niches. However, resolving the fine-scale spatial organisation of these microbial communities remains a challenge.
Two-million-year-old microbial communities from the Kap København Formation in North Greenland
Abstract Environmental DNA (eDNA) from the 2-million-year-old Kap København Formation of northern Greenland has revealed an ecosystem of plants and animals with no contemporary analogue. Here, we reconstruct the microbial (bacterial, archaeal, and viral) communities that thrived at the site during this time.
Centennial scale sequences of environmental deterioration preceded the end-Permian mass extinction - Nature Communications
Abstract The exact drivers for the end-Permian mass extinction (EPME) remain controversial. Here we focus on a ~10,000 yr record from the marine type section at Meishan, China, preceding and covering the onset of the EPME. Analyses of polyaromatic hydrocarbons at sampling intervals representing 1.5–6.3 yr reveal recurrent pulses of wildfires in the terrestrial realm.
Deglacial increase of seasonal temperature variability in the tropical ocean - Nature
Abstract The relatively stable Holocene climate was preceded by a pronounced event of abrupt warming in the Northern Hemisphere, the termination of the Younger Dryas (YD) cold period1,2. Although this transition has been intensively studied, its imprint on low-latitude ocean temperature is still controversial and its effects on sub-annual to decadal climate variability remain poorly understood1,3,4.
Last Interglacial decadal sea surface temperature variability in the eastern Mediterranean - Nature Geoscience
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Abstract The Last Interglacial (~129,000–116,000 years ago) is the most recent geologic period with a warmer-than-present climate. Proxy-based temperature reconstructions from this interval can help contextualize natural climate variability in our currently warming world, especially if they can define changes on decadal timescales.
By David De Vleeschouwer, Lars Wörmer, Michal Kucera Verified, Matthias Prange, Igor Obreht, Devika Varma
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Nature
Verified
Global diversity of microbial communities in marine sediment
Global diversity of microbial communities in marine sediment Tatsuhiko Hoshino, Hideyuki Doi, Go-Ichiro Uramoto, Lars Wörmer, Rishi R. Adhikari, Nan Xiao, Yuki Morono, Steven D’Hondt, Kai-Uwe Hinrichs, Fumio Inagaki Proceedings of the National Academy of Sciences Oct 2020, 201919139; DOI: 10.1073/pnas.1919139117
Microbial dormancy in the marine subsurface: Global endospore abundance and response to burial
Abstract Marine sediments host an unexpectedly large microbial biosphere, suggesting unique microbial mechanisms for surviving burial and slow metabolic turnover. Although dormancy is generally considered an important survival strategy, its specific role in subsurface sediments remains unclear. We quantified dormant bacterial endospores in 331 marine sediment samples from diverse depositional types and geographical origins.
Bisnorgammacerane traces predatory pressure and the persistent rise of algal ecosystems after Snowball Earth
Abstract Eukaryotic algae rose to ecological relevance after the Neoproterozoic Snowball Earth glaciations, but the causes for this consequential evolutionary transition remain enigmatic. Cap carbonates were globally deposited directly after these glaciations, but they are usually organic barren or thermally overprinted. Here we show that uniquely-preserved cap dolostones of the Araras Group contain exceptional abundances of a newly identified biomarker: 25,28-bisnorgammacerane.
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