Search Results - "Stueeken, Eva E."

A test of the nitrogen-limitation hypothesis for retarded eukaryote radiation: Nitrogen isotopes across a Mesoproterozoic basinal profile by Stueeken, Eva E

“…Nitrogen limitation caused by trace metal scarcity under euxinic ocean conditions has been proposed as an explanation for the delayed radiation of eukaryotes…”
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Contributions to late Archaean sulphur cycling by life on land by Stüeken, Eva E., Catling, David C., Buick, Roger

“…Life on land dates back at least 2.7 billion years, but the effects of this early terrestrial biosphere on biogeochemical cycling are poorly constrained…”
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Tracking the rise of eukaryotes to ecological dominance with zinc isotopes by Isson, Terry T., Love, Gordon D., Dupont, Christopher L., Reinhard, Christopher T., Zumberge, Alex J., Asael, Dan, Gueguen, Bleuenn, McCrow, John, Gill, Ben C., Owens, Jeremy, Rainbird, Robert H., Rooney, Alan D., Zhao, Ming‐Yu, Stueeken, Eva E., Konhauser, Kurt O., John, Seth G., Lyons, Timothy W., Planavsky, Noah J.

“…The biogeochemical cycling of zinc (Zn) is intimately coupled with organic carbon in the ocean. Based on an extensive new sedimentary Zn isotope record across…”
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Selenium isotope ratios, redox changes and biological productivity across the end-Permian mass extinction by Stüeken, Eva E., Foriel, Julien, Buick, Roger, Schoepfer, Shane D.

“…The causes of the greatest mass extinction in Earth's history, in the latest Permian, remain actively debated. Here we use Se isotopes and abundances in marine…”
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The evolution of Earth's biogeochemical nitrogen cycle by Stüeken, Eva E., Kipp, Michael A., Koehler, Matthew C., Buick, Roger

“…Nitrogen is an essential nutrient for all life on Earth and it acts as a major control on biological productivity in the modern ocean. Accurate reconstructions…”
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Pervasive aerobic nitrogen cycling in the surface ocean across the Paleoproterozoic Era by Kipp, Michael A., Stüeken, Eva E., Yun, Misuk, Bekker, Andrey, Buick, Roger

“…Nitrogen isotope ratios in marine sedimentary rocks have become a widely used biogeochemical proxy that records information about nutrient cycling and redox…”
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Environmental control on microbial diversification and methane production in the Mesoarchean by Stüeken, Eva E., Buick, Roger

“…•The Lalla Rookh Sandstone records microbial life in lakes back to 3.0 Ga.•Nitrogen isotopes point to biological N2 fixation in an anoxic setting.•Organic δ13C…”
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Evaluating the biosignature potential of nitrogen concentrations in graphite and associated K-silicates by Stüeken, Eva E., Szilas, Kristoffer, van Hinsberg, Vincent J.

“…The oldest remnants of life on Earth from various localities in the Isua supracrustal belt in Greenland date back to >3.7 billion years ago (Ga). They are in…”
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Sedimentary exhalative venting of bioavailable nitrogen into the early ocean by Stüeken, Eva E., Gregory, Daniel D., Mukherjee, Indrani, McGoldrick, Peter

“…Ore deposits found in Proterozoic marine sedimentary basins supply much of the world's zinc. Many of the deposits formed contemporaneously with their host…”
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Isotopic evidence for biological nitrogen fixation by molybdenum-nitrogenase from 3.2 Gyr by Stüeken, Eva E., Buick, Roger, Guy, Bradley M., Koehler, Matthew C.

“…Nitrogen isotope ratios from rocks between 3.2 and 2.75 billion years old are most readily explained by biological nitrogen fixation, most probably using the…”
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Unsynchronized evolution of salinity and pH of a Permian alkaline lake influenced by hydrothermal fluids: A multi-proxy geochemical study by Xia, Liuwen, Cao, Jian, Stüeken, Eva E., Zhi, Dongming, Wang, Tingting, Li, Wenwen

“…Hyperalkaline waters display unusually high productivity, which makes them prime targets in the search for life elsewhere in the solar system. However, the…”
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Dynamic evolution of marine productivity, redox, and biogeochemical cycling track local and global controls on Cryogenian sea-level change by Tu, Chenyi, Diamond, Charles W., Stüeken, Eva E., Cao, Mengchun, Pan, Wen, Lyons, Timothy W.

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Limitation of fixed nitrogen and deepening of the carbonate-compensation depth through the Hirnantian at Dob's Linn, Scotland by Koehler, Matthew C., Stüeken, Eva E., Hillier, Stephen, Prave, Anthony R.

“…The late Ordovician is characterized by dramatic changes in global climate concurrent with a major mass extinction and possible changes in ocean redox. To…”
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Basinal hydrographic and redox controls on selenium enrichment and isotopic composition in Paleozoic black shales by Kipp, Michael A., Algeo, Thomas J., Stüeken, Eva E., Buick, Roger

“…Mass-dependent variations in selenium stable isotope ratios have recently been developed as a paleo-redox proxy. Since the reduction of selenium oxyanions…”
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Effects of pH on redox proxies in a Jurassic rift lake: Implications for interpreting environmental records in deep time by Stüeken, Eva E., Martinez, Aaron, Love, Gordon, Olsen, Paul E., Bates, Steve, Lyons, Timothy W.

“…It is widely agreed that the Earth’s atmosphere and oceans have undergone major redox changes over the last 2.5 billion years. However, the magnitude of these…”
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Spatial and temporal trends in Precambrian nitrogen cycling: A Mesoproterozoic offshore nitrate minimum by Koehler, Matthew C., Stüeken, Eva E., Kipp, Michael A., Buick, Roger, Knoll, Andrew H.

“…Fixed nitrogen is an essential nutrient for eukaryotes. As N2 fixation and assimilation of nitrate are catalyzed by metalloenzymes, it has been hypothesized…”
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Coupled evolution of nitrogen cycling and redoxcline dynamics on the Yangtze Block across the Ediacaran-Cambrian transition by Chen, Yan, Diamond, Charles W., Stüeken, Eva E., Cai, Chunfang, Gill, Benjamin C., Zhang, Feifei, Bates, Steve M., Chu, Xuelei, Ding, Yi, Lyons, Timothy W.

“…The Ediacaran-Cambrian transition is characterized by the evolution of complex eukaryotes and rapid diversification of metazoans. However, linkages between…”
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Selenium isotopes record extensive marine suboxia during the Great Oxidation Event by Kipp, Michael A., Stüeken, Eva E., Bekker, Andrey, Buick, Roger

“…It has been proposed that an “oxygen overshoot” occurred during the early Paleoproterozoic Great Oxidation Event (GOE) in association with the extreme positive…”
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Geochemical fingerprints of seawater in the Late Mesoproterozoic Midcontinent Rift, North America: Life at the marine-land divide by Stüeken, Eva E., Jones, Simon, Raub, Timothy D., Prave, Anthony R., Rose, Catherine V., Linnekogel, Stella, Cloutier, Jonathan

“…The 1.1 Ga Midcontinent Rift (MCR) is a thick volcanic-sedimentary succession that forms a curvilinear belt through central North America and crops out along…”
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Equilibrium partitioning and isotopic fractionation of nitrogen between biotite, plagioclase, and K-feldspar during magmatic differentiation by Boocock, Toby J., Stüeken, Eva E., Bybee, Grant M., König, Ramona, Boyce, Adrian J., Prytulak, Julie, Buisman, Iris, Mikhail, Sami

“…A significant portion of the continental crust is composed of plutonic igneous rocks. However, little is known about the geochemical behaviour of N between the…”
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