Articles | Volume 13, issue 10
https://doi.org/10.5194/bg-13-3147-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-13-3147-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
31 May 2016
Research article |
| 31 May 2016
Ecosystem regimes and responses in a coupled ancient lake system from MIS 5b to present: the diatom record of lakes Ohrid and Prespa
Aleksandra Cvetkoska
CORRESPONDING AUTHOR
Utrecht University, Palaeoecology, Department of Physical Geography, Utrecht, the Netherlands
Elena Jovanovska
Justus Liebig University, Department of Animal Ecology and Systematics, Giessen, Germany
Alexander Francke
University of Cologne, Institute of Geology and Mineralogy, Cologne, Germany
Slavica Tofilovska
University Ss Cyril and Methodius, Institute of Biology, Skopje, Macedonia
Hendrik Vogel
University of Bern, Institute of Geological Sciences & Oeschger Centre for Climate Change Research, Bern, Switzerland
Zlatko Levkov
University Ss Cyril and Methodius, Institute of Biology, Skopje, Macedonia
Timme H. Donders
Utrecht University, Palaeoecology, Department of Physical Geography, Utrecht, the Netherlands
Bernd Wagner
University of Cologne, Institute of Geology and Mineralogy, Cologne, Germany
Friederike Wagner-Cremer
Utrecht University, Palaeoecology, Department of Physical Geography, Utrecht, the Netherlands
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Bruno Wilhelm, Hendrik Vogel, and Flavio S. Anselmetti
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Bernd Wagner, Thomas Wilke, Alexander Francke, Christian Albrecht, Henrike Baumgarten, Adele Bertini, Nathalie Combourieu-Nebout, Aleksandra Cvetkoska, Michele D'Addabbo, Timme H. Donders, Kirstin Föller, Biagio Giaccio, Andon Grazhdani, Torsten Hauffe, Jens Holtvoeth, Sebastien Joannin, Elena Jovanovska, Janna Just, Katerina Kouli, Andreas Koutsodendris, Sebastian Krastel, Jack H. Lacey, Niklas Leicher, Melanie J. Leng, Zlatko Levkov, Katja Lindhorst, Alessia Masi, Anna M. Mercuri, Sebastien Nomade, Norbert Nowaczyk, Konstantinos Panagiotopoulos, Odile Peyron, Jane M. Reed, Eleonora Regattieri, Laura Sadori, Leonardo Sagnotti, Björn Stelbrink, Roberto Sulpizio, Slavica Tofilovska, Paola Torri, Hendrik Vogel, Thomas Wagner, Friederike Wagner-Cremer, George A. Wolff, Thomas Wonik, Giovanni Zanchetta, and Xiaosen S. Zhang
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Wim Westerhoff, Timme Donders, and Stefan Luthi
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James M. Russell, Satria Bijaksana, Hendrik Vogel, Martin Melles, Jens Kallmeyer, Daniel Ariztegui, Sean Crowe, Silvia Fajar, Abdul Hafidz, Doug Haffner, Ascelina Hasberg, Sarah Ivory, Christopher Kelly, John King, Kartika Kirana, Marina Morlock, Anders Noren, Ryan O'Grady, Luis Ordonez, Janelle Stevenson, Thomas von Rintelen, Aurele Vuillemin, Ian Watkinson, Nigel Wattrus, Satrio Wicaksono, Thomas Wonik, Kohen Bauer, Alan Deino, André Friese, Cynthia Henny, Imran, Ristiyanti Marwoto, La Ode Ngkoimani, Sulung Nomosatryo, La Ode Safiuddin, Rachel Simister, and Gerald Tamuntuan
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Giovanni Zanchetta, Eleonora Regattieri, Biagio Giaccio, Bernd Wagner, Roberto Sulpizio, Alex Francke, Hendrik Vogel, Laura Sadori, Alessia Masi, Gaia Sinopoli, Jack H. Lacey, Melanie J. Leng, and Niklas Leicher
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Niklas Leicher, Giovanni Zanchetta, Roberto Sulpizio, Biagio Giaccio, Bernd Wagner, Sebastien Nomade, Alexander Francke, and Paola Del Carlo
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Janna Just, Norbert R. Nowaczyk, Leonardo Sagnotti, Alexander Francke, Hendrik Vogel, Jack H. Lacey, and Bernd Wagner
Biogeosciences, 13, 2093–2109, https://doi.org/10.5194/bg-13-2093-2016, https://doi.org/10.5194/bg-13-2093-2016, 2016
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Jack H. Lacey, Melanie J. Leng, Alexander Francke, Hilary J. Sloane, Antoni Milodowski, Hendrik Vogel, Henrike Baumgarten, Giovanni Zanchetta, and Bernd Wagner
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We use stable isotope data from carbonates to provide a palaeoenvironmental reconstruction covering the last 637 kyr at Lake Ohrid (FYROM/Albania). Our results indicate a relatively stable climate until 450 ka, wetter climate conditions at 400–250 ka, and a transition to a drier climate after 250 ka. This work emphasises the importance of Lake Ohrid as a valuable archive of climate change in the northern Mediterranean region.
Laura Sadori, Andreas Koutsodendris, Konstantinos Panagiotopoulos, Alessia Masi, Adele Bertini, Nathalie Combourieu-Nebout, Alexander Francke, Katerina Kouli, Sébastien Joannin, Anna Maria Mercuri, Odile Peyron, Paola Torri, Bernd Wagner, Giovanni Zanchetta, Gaia Sinopoli, and Timme H. Donders
Biogeosciences, 13, 1423–1437, https://doi.org/10.5194/bg-13-1423-2016, https://doi.org/10.5194/bg-13-1423-2016, 2016
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Lake Ohrid (FYROM/Albania) is the deepest, largest and oldest lake in Europe. To understand the climatic and environmental evolution of its area, a palynological study was undertaken for the last 500 ka. We found a correspondence between forested/non-forested periods and glacial-interglacial cycles of marine isotope stratigraphy. Our record shows a progressive change from cooler and wetter to warmer and dryer interglacial conditions. This shift is also visible in glacial vegetation.
X. S. Zhang, J. M. Reed, J. H. Lacey, A. Francke, M. J. Leng, Z. Levkov, and B. Wagner
Biogeosciences, 13, 1351–1365, https://doi.org/10.5194/bg-13-1351-2016, https://doi.org/10.5194/bg-13-1351-2016, 2016
Alexander Francke, Bernd Wagner, Janna Just, Niklas Leicher, Raphael Gromig, Henrike Baumgarten, Hendrik Vogel, Jack H. Lacey, Laura Sadori, Thomas Wonik, Melanie J. Leng, Giovanni Zanchetta, Roberto Sulpizio, and Biagio Giaccio
Biogeosciences, 13, 1179–1196, https://doi.org/10.5194/bg-13-1179-2016, https://doi.org/10.5194/bg-13-1179-2016, 2016
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Lake Ohrid (Macedonia, Albania) is thought to be more than 1.2 million years old. To recover a long paleoclimate record for the Mediterranean region, a deep drilling was carried out in 2013 within the scope of the Scientific Collaboration on Past Speciation Conditions in Lake Ohrid (SCOPSCO) project. Here, we present lithological, sedimentological, and (bio-)geochemical data from the upper 247.8 m composite depth of the overall 569 m long DEEP site record.
Elena Jovanovska, Aleksandra Cvetkoska, Torsten Hauffe, Zlatko Levkov, Bernd Wagner, Roberto Sulpizio, Alexander Francke, Christian Albrecht, and Thomas Wilke
Biogeosciences, 13, 1149–1161, https://doi.org/10.5194/bg-13-1149-2016, https://doi.org/10.5194/bg-13-1149-2016, 2016
B. Wilhelm, H. Vogel, C. Crouzet, D. Etienne, and F. S. Anselmetti
Clim. Past, 12, 299–316, https://doi.org/10.5194/cp-12-299-2016, https://doi.org/10.5194/cp-12-299-2016, 2016
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The long-term response of the flood activity to both Atlantic and Mediterranean climatic influences was explored by reconstructing the Foréant record. Both influences result in a higher flood frequency during past cold periods. Atlantic influences seem to result in more frequent high-intensity flood events during past warm periods, suggesting an increase in flood intensity under the global warming. However, no high-intensity events occurred during the 20th century.
J. Holtvoeth, D. Rushworth, H. Copsey, A. Imeri, M. Cara, H. Vogel, T. Wagner, and G. A. Wolff
Biogeosciences, 13, 795–816, https://doi.org/10.5194/bg-13-795-2016, https://doi.org/10.5194/bg-13-795-2016, 2016
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Lake Ohrid is situated in the southern Balkans between Albania and Macedonia. It is a unique ecosystem with remarkable biodiversity and a sediment record of past climates that goes back more than a million years. Detailed reconstructions of past climate development and human alteration of the environment require underpinned and so in this study we go the present-day lake vegetation and catchment soils and test new proxies over one of the known recent cooling events of the region 8200 years ago.
H. Baumgarten, T. Wonik, D. C. Tanner, A. Francke, B. Wagner, G. Zanchetta, R. Sulpizio, B. Giaccio, and S. Nomade
Biogeosciences, 12, 7453–7465, https://doi.org/10.5194/bg-12-7453-2015, https://doi.org/10.5194/bg-12-7453-2015, 2015
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Gamma ray (GR) fluctuations and K values from downhole logging data obtained in the sediments of Lake Ohrid correlate with the global climate reference record (LR04 stack from δ18O) (Lisiecki and Raymo, 2005). GR and K values are considered a reliable proxy to depict glacial-interglacial cycles and document warm, humid and cold, drier periods. A robust age model for the downhole logging data over the past 630kyr was established and will play a crucial role for other working groups.
B. Giaccio, E. Regattieri, G. Zanchetta, B. Wagner, P. Galli, G. Mannella, E. Niespolo, E. Peronace, P. R. Renne, S. Nomade, G. P. Cavinato, P. Messina, A. Sposato, C. Boschi, F. Florindo, F. Marra, and L. Sadori
Sci. Dril., 20, 13–19, https://doi.org/10.5194/sd-20-13-2015, https://doi.org/10.5194/sd-20-13-2015, 2015
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As a pilot study for a possible depth-drilling project, an 82m long sedimentary succession was retrieved from the Fucino Basin, central Apennines, which hosts ca. 900m of lacustrine sediments. The acquired paleoclimatic record, from the retrieved core, spans the last 180ka and reveals noticeable variations related to the last two glacial-interglacial cycles. In light of these results, the Fucino sediments are likely to provide one of the longest continuous record for the last 2Ma.
H. A. Dugan, P. T. Doran, B. Wagner, F. Kenig, C. H. Fritsen, S. A. Arcone, E. Kuhn, N. E. Ostrom, J. P. Warnock, and A. E. Murray
The Cryosphere, 9, 439–450, https://doi.org/10.5194/tc-9-439-2015, https://doi.org/10.5194/tc-9-439-2015, 2015
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Lake Vida is one of the largest lakes in the McMurdo dry valleys, Antarctica, and has the thickest known ice cover of any lake on Earth. For the first time, Lake Vida was drilled to a depth of 27m. With depth the ice cover changes from freshwater ice to salty ice interspersed with thick sediment layers. It is hypothesized that the repetition of sediment layers in the ice will reveal climatic and hydrologic variability in the region over the last 1000--3000 years.
V. Wennrich, P. S. Minyuk, V. Borkhodoev, A. Francke, B. Ritter, N. R. Nowaczyk, M. A. Sauerbrey, J. Brigham-Grette, and M. Melles
Clim. Past, 10, 1381–1399, https://doi.org/10.5194/cp-10-1381-2014, https://doi.org/10.5194/cp-10-1381-2014, 2014
B. Wagner, T. Wilke, S. Krastel, G. Zanchetta, R. Sulpizio, K. Reicherter, M. J. Leng, A. Grazhdani, S. Trajanovski, A. Francke, K. Lindhorst, Z. Levkov, A. Cvetkoska, J. M. Reed, X. Zhang, J. H. Lacey, T. Wonik, H. Baumgarten, and H. Vogel
Sci. Dril., 17, 19–29, https://doi.org/10.5194/sd-17-19-2014, https://doi.org/10.5194/sd-17-19-2014, 2014
K. Panagiotopoulos, A. Böhm, M. J. Leng, B. Wagner, and F. Schäbitz
Clim. Past, 10, 643–660, https://doi.org/10.5194/cp-10-643-2014, https://doi.org/10.5194/cp-10-643-2014, 2014
B. Wagner, M. J. Leng, T. Wilke, A. Böhm, K. Panagiotopoulos, H. Vogel, J. H. Lacey, G. Zanchetta, and R. Sulpizio
Clim. Past, 10, 261–267, https://doi.org/10.5194/cp-10-261-2014, https://doi.org/10.5194/cp-10-261-2014, 2014
C. Meyer-Jacob, H. Vogel, A. C. Gebhardt, V. Wennrich, M. Melles, and P. Rosén
Clim. Past, 10, 209–220, https://doi.org/10.5194/cp-10-209-2014, https://doi.org/10.5194/cp-10-209-2014, 2014
A. Francke, V. Wennrich, M. Sauerbrey, O. Juschus, M. Melles, and J. Brigham-Grette
Clim. Past, 9, 2459–2470, https://doi.org/10.5194/cp-9-2459-2013, https://doi.org/10.5194/cp-9-2459-2013, 2013
N. R. Nowaczyk, E. M. Haltia, D. Ulbricht, V. Wennrich, M. A. Sauerbrey, P. Rosén, H. Vogel, A. Francke, C. Meyer-Jacob, A. A. Andreev, and A. V. Lozhkin
Clim. Past, 9, 2413–2432, https://doi.org/10.5194/cp-9-2413-2013, https://doi.org/10.5194/cp-9-2413-2013, 2013
M. Magny, N. Combourieu-Nebout, J. L. de Beaulieu, V. Bout-Roumazeilles, D. Colombaroli, S. Desprat, A. Francke, S. Joannin, E. Ortu, O. Peyron, M. Revel, L. Sadori, G. Siani, M. A. Sicre, S. Samartin, A. Simonneau, W. Tinner, B. Vannière, B. Wagner, G. Zanchetta, F. Anselmetti, E. Brugiapaglia, E. Chapron, M. Debret, M. Desmet, J. Didier, L. Essallami, D. Galop, A. Gilli, J. N. Haas, N. Kallel, L. Millet, A. Stock, J. L. Turon, and S. Wirth
Clim. Past, 9, 2043–2071, https://doi.org/10.5194/cp-9-2043-2013, https://doi.org/10.5194/cp-9-2043-2013, 2013
A. C. Gebhardt, A. Francke, J. Kück, M. Sauerbrey, F. Niessen, V. Wennrich, and M. Melles
Clim. Past, 9, 1933–1947, https://doi.org/10.5194/cp-9-1933-2013, https://doi.org/10.5194/cp-9-1933-2013, 2013
U. Frank, N. R. Nowaczyk, P. Minyuk, H. Vogel, P. Rosén, and M. Melles
Clim. Past, 9, 1559–1569, https://doi.org/10.5194/cp-9-1559-2013, https://doi.org/10.5194/cp-9-1559-2013, 2013
H. Vogel, C. Meyer-Jacob, M. Melles, J. Brigham-Grette, A. A. Andreev, V. Wennrich, P. E. Tarasov, and P. Rosén
Clim. Past, 9, 1467–1479, https://doi.org/10.5194/cp-9-1467-2013, https://doi.org/10.5194/cp-9-1467-2013, 2013
L. Cunningham, H. Vogel, V. Wennrich, O. Juschus, N. Nowaczyk, and P. Rosén
Clim. Past, 9, 679–686, https://doi.org/10.5194/cp-9-679-2013, https://doi.org/10.5194/cp-9-679-2013, 2013
A. Francke, B. Wagner, M. J. Leng, and J. Rethemeyer
Clim. Past, 9, 481–498, https://doi.org/10.5194/cp-9-481-2013, https://doi.org/10.5194/cp-9-481-2013, 2013
M. Damaschke, R. Sulpizio, G. Zanchetta, B. Wagner, A. Böhm, N. Nowaczyk, J. Rethemeyer, and A. Hilgers
Clim. Past, 9, 267–287, https://doi.org/10.5194/cp-9-267-2013, https://doi.org/10.5194/cp-9-267-2013, 2013
V. Wennrich, A. Francke, A. Dehnert, O. Juschus, T. Leipe, C. Vogt, J. Brigham-Grette, P. S. Minyuk, M. Melles, and El'gygytgyn Science Party
Clim. Past, 9, 135–148, https://doi.org/10.5194/cp-9-135-2013, https://doi.org/10.5194/cp-9-135-2013, 2013
B. Wagner, A. Francke, R. Sulpizio, G. Zanchetta, K. Lindhorst, S. Krastel, H. Vogel, J. Rethemeyer, G. Daut, A. Grazhdani, B. Lushaj, and S. Trajanovski
Clim. Past, 8, 2069–2078, https://doi.org/10.5194/cp-8-2069-2012, https://doi.org/10.5194/cp-8-2069-2012, 2012
Related subject area
Biodiversity and Ecosystem Function: Paleo
Palaeoecology of ungulates in northern Iberia during the Late Pleistocene through isotopic analysis of teeth
Reply to Head's comment on “The Volyn biota (Ukraine) – indications of 1.5 Gyr old eukaryotes in 3D preservation, a spotlight on the `boring billion' ” by Franz et al. (2023)
Comment on “The Volyn biota (Ukraine) – indications of 1.5 Gyr old eukaryotes in 3D preservation, a spotlight on the `boring billion' ” by Franz et al. (2023)
Rates of palaeoecological change can inform ecosystem restoration
Paleoecology and evolutionary response of planktonic foraminifera to the mid-Pliocene Warm Period and Plio-Pleistocene bipolar ice sheet expansion
Late Neogene evolution of modern deep-dwelling plankton
Photosynthetic activity in Devonian Foraminifera
Microbial activity, methane production, and carbon storage in Early Holocene North Sea peats
Planktonic foraminifera-derived environmental DNA extracted from abyssal sediments preserves patterns of plankton macroecology
Metagenomic analyses of the late Pleistocene permafrost – additional tools for reconstruction of environmental conditions
Differential resilience of ancient sister lakes Ohrid and Prespa to environmental disturbances during the Late Pleistocene
Stable isotope study of a new chondrichthyan fauna (Kimmeridgian, Porrentruy, Swiss Jura): an unusual freshwater-influenced isotopic composition for the hybodont shark Asteracanthus
Amelioration of marine environments at the Smithian–Spathian boundary, Early Triassic
Weathering by tree-root-associating fungi diminishes under simulated Cenozoic atmospheric CO2 decline
The impact of land-use change on floristic diversity at regional scale in southern Sweden 600 BC–AD 2008
Climate-related changes in peatland carbon accumulation during the last millennium
Stratigraphy and paleoenvironments of the early to middle Holocene Chipalamawamba Beds (Malawi Basin, Africa)
Experimental mineralization of crustacean eggs: new implications for the fossilization of Precambrian–Cambrian embryos
The last glacial-interglacial cycle in Lake Ohrid (Macedonia/Albania): testing diatom response to climate
Mónica Fernández-García, Sarah Pederzani, Kate Britton, Lucía Agudo-Pérez, Andrea Cicero, Jeanne Marie Geiling, Joan Daura, Montserrat Sanz, and Ana B. Marín-Arroyo
Biogeosciences, 21, 4413–4437, https://doi.org/10.5194/bg-21-4413-2024, https://doi.org/10.5194/bg-21-4413-2024, 2024
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Significant climatic changes affected Europe's vegetation and fauna, affecting human subsistence strategies during the Late Pleistocene. Reconstructing the local conditions humans faced is essential to understanding their adaptation processes and resilience. This study analyses the chemical composition of the teeth of herbivores consumed by humans 80,000 to 15,000 years ago, revealing the ecology of ungulates in northern Iberia and thus the palaeoenvironment humans exploited.
Gerhard Franz, Vladimir Khomenko, Peter Lyckberg, Vsevolod Chournousenko, and Ulrich Struck
Biogeosciences, 21, 4119–4131, https://doi.org/10.5194/bg-21-4119-2024, https://doi.org/10.5194/bg-21-4119-2024, 2024
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The Volyn biota (Ukraine), previously assumed to be an extreme case of natural abiotic synthesis of organic matter, is more likely a diverse assemblage of fossils from the deep biosphere. Although contamination by modern organisms cannot completely be ruled out, it is unlikely, considering all aspects, i.e., their mode of occurrence in the deep biosphere, their fossilization and mature state of organic matter, their isotope signature, and their large morphological diversity.
Martin J. Head, James B. Riding, Jennifer M. K. O'Keefe, Julius Jeiter, and Julia Gravendyck
Biogeosciences, 21, 1773–1783, https://doi.org/10.5194/bg-21-1773-2024, https://doi.org/10.5194/bg-21-1773-2024, 2024
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A diverse suite of “fossils” associated with the ~1.5 Ga Volyn (Ukraine) kerite was published recently. We show that at least some of them represent modern contamination including plant hairs, pollen, and likely later fungal growth. Comparable diversity is shown to exist in moderm museum dust, calling into question whether any part of the Volyn biota is of biological origin while emphasising the need for scrupulous care in collecting, analysing, and identifying Precambrian microfossils.
Walter Finsinger, Christian Bigler, Christoph Schwörer, and Willy Tinner
Biogeosciences, 21, 1629–1638, https://doi.org/10.5194/bg-21-1629-2024, https://doi.org/10.5194/bg-21-1629-2024, 2024
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Rate-of-change records based on compositional data are ambiguous as they may rise irrespective of the underlying trajectory of ecosystems. We emphasize the importance of characterizing both the direction and the rate of palaeoecological changes in terms of key features of ecosystems rather than solely on community composition. Past accelerations of community transformation may document the potential of ecosystems to rapidly recover important ecological attributes and functions.
Adam Woodhouse, Frances A. Procter, Sophie L. Jackson, Robert A. Jamieson, Robert J. Newton, Philip F. Sexton, and Tracy Aze
Biogeosciences, 20, 121–139, https://doi.org/10.5194/bg-20-121-2023, https://doi.org/10.5194/bg-20-121-2023, 2023
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This study looked into the regional and global response of planktonic foraminifera to the climate over the last 5 million years, when the Earth cooled significantly. These single celled organisms exhibit the best fossil record available to science. We document an abundance switch from warm water to cold water species as the Earth cooled. Moreover, a closer analysis of certain species may indicate higher fossil diversity than previously thought, which has implications for evolutionary studies.
Flavia Boscolo-Galazzo, Amy Jones, Tom Dunkley Jones, Katherine A. Crichton, Bridget S. Wade, and Paul N. Pearson
Biogeosciences, 19, 743–762, https://doi.org/10.5194/bg-19-743-2022, https://doi.org/10.5194/bg-19-743-2022, 2022
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Deep-living organisms are a major yet poorly known component of ocean biomass. Here we reconstruct the evolution of deep-living zooplankton and phytoplankton. Deep-dwelling zooplankton and phytoplankton did not occur 15 Myr ago, when the ocean was several degrees warmer than today. Deep-dwelling species first evolve around 7.5 Myr ago, following global climate cooling. Their evolution was driven by colder ocean temperatures allowing more food, oxygen, and light at depth.
Zofia Dubicka, Maria Gajewska, Wojciech Kozłowski, Pamela Hallock, and Johann Hohenegger
Biogeosciences, 18, 5719–5728, https://doi.org/10.5194/bg-18-5719-2021, https://doi.org/10.5194/bg-18-5719-2021, 2021
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Benthic foraminifera play a significant role in modern reefal ecosystems mainly due to their symbiosis with photosynthetic microorganisms. Foraminifera were also components of Devonian stromatoporoid coral reefs; however, whether they could have harbored symbionts has remained unclear. We show that Devonian foraminifera may have stayed photosynthetically active, which likely had an impact on their evolutionary radiation and possibly also on the functioning of Paleozoic shallow marine ecosystems.
Tanya J. R. Lippmann, Michiel H. in 't Zandt, Nathalie N. L. Van der Putten, Freek S. Busschers, Marc P. Hijma, Pieter van der Velden, Tim de Groot, Zicarlo van Aalderen, Ove H. Meisel, Caroline P. Slomp, Helge Niemann, Mike S. M. Jetten, Han A. J. Dolman, and Cornelia U. Welte
Biogeosciences, 18, 5491–5511, https://doi.org/10.5194/bg-18-5491-2021, https://doi.org/10.5194/bg-18-5491-2021, 2021
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This paper is a step towards understanding the basal peat ecosystem beneath the North Sea. Plant remains followed parallel sequences. Methane concentrations were low with local exceptions, with the source likely being trapped pockets of millennia-old methane. Microbial community structure indicated the absence of a biofilter and was diverse across sites. Large carbon stores in the presence of methanogens and in the absence of methanotrophs have the potential to be metabolized into methane.
Raphaël Morard, Franck Lejzerowicz, Kate F. Darling, Béatrice Lecroq-Bennet, Mikkel Winther Pedersen, Ludovic Orlando, Jan Pawlowski, Stefan Mulitza, Colomban de Vargas, and Michal Kucera
Biogeosciences, 14, 2741–2754, https://doi.org/10.5194/bg-14-2741-2017, https://doi.org/10.5194/bg-14-2741-2017, 2017
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The exploitation of deep-sea sedimentary archive relies on the recovery of mineralized skeletons of pelagic organisms. Planktonic groups leaving preserved remains represent only a fraction of the total marine diversity. Environmental DNA left by non-fossil organisms is a promising source of information for paleo-reconstructions. Here we show how planktonic-derived environmental DNA preserves ecological structure of planktonic communities. We use planktonic foraminifera as a case study.
Elizaveta Rivkina, Lada Petrovskaya, Tatiana Vishnivetskaya, Kirill Krivushin, Lyubov Shmakova, Maria Tutukina, Arthur Meyers, and Fyodor Kondrashov
Biogeosciences, 13, 2207–2219, https://doi.org/10.5194/bg-13-2207-2016, https://doi.org/10.5194/bg-13-2207-2016, 2016
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A comparative analysis of the metagenomes from two 30,000-year-old permafrost samples, one of lake-alluvial origin and the other from late Pleistocene Ice Complex sediments, revealed significant differences within microbial communities. The late Pleistocene Ice Complex sediments (which are characterized by the absence of methane with lower values of redox potential and Fe2+ content) showed both a low abundance of methanogenic archaea and enzymes from the carbon, nitrogen, and sulfur cycles.
Elena Jovanovska, Aleksandra Cvetkoska, Torsten Hauffe, Zlatko Levkov, Bernd Wagner, Roberto Sulpizio, Alexander Francke, Christian Albrecht, and Thomas Wilke
Biogeosciences, 13, 1149–1161, https://doi.org/10.5194/bg-13-1149-2016, https://doi.org/10.5194/bg-13-1149-2016, 2016
L. Leuzinger, L. Kocsis, J.-P. Billon-Bruyat, S. Spezzaferri, and T. Vennemann
Biogeosciences, 12, 6945–6954, https://doi.org/10.5194/bg-12-6945-2015, https://doi.org/10.5194/bg-12-6945-2015, 2015
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We measured the oxygen isotopic composition of Late Jurassic chondrichthyan teeth (sharks, rays, chimaeras) from the Swiss Jura to get ecological information. The main finding is that the extinct shark Asteracanthus (Hybodontiformes) could inhabit reduced salinity areas, although previous studies on other European localities always resulted in a clear marine isotopic signal for this genus. We propose a mainly marine ecology coupled with excursions into areas of lower salinity in our study site.
L. Zhang, L. Zhao, Z.-Q. Chen, T. J. Algeo, Y. Li, and L. Cao
Biogeosciences, 12, 1597–1613, https://doi.org/10.5194/bg-12-1597-2015, https://doi.org/10.5194/bg-12-1597-2015, 2015
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The Smithian--Spathian boundary was a key event in the recovery of marine environments and ecosystems following the end-Permian mass extinction ~1.5 million years earlier. Our analysis of the Shitouzhai section in South China reveals major changes in oceanographic conditions at the SSB intensification of oceanic circulation leading to enhanced upwelling of nutrient- and sulfide-rich deep waters and coinciding with an abrupt cooling that terminated the Early Triassic hothouse climate.
J. Quirk, J. R. Leake, S. A. Banwart, L. L. Taylor, and D. J. Beerling
Biogeosciences, 11, 321–331, https://doi.org/10.5194/bg-11-321-2014, https://doi.org/10.5194/bg-11-321-2014, 2014
D. Fredh, A. Broström, M. Rundgren, P. Lagerås, F. Mazier, and L. Zillén
Biogeosciences, 10, 3159–3173, https://doi.org/10.5194/bg-10-3159-2013, https://doi.org/10.5194/bg-10-3159-2013, 2013
D. J. Charman, D. W. Beilman, M. Blaauw, R. K. Booth, S. Brewer, F. M. Chambers, J. A. Christen, A. Gallego-Sala, S. P. Harrison, P. D. M. Hughes, S. T. Jackson, A. Korhola, D. Mauquoy, F. J. G. Mitchell, I. C. Prentice, M. van der Linden, F. De Vleeschouwer, Z. C. Yu, J. Alm, I. E. Bauer, Y. M. C. Corish, M. Garneau, V. Hohl, Y. Huang, E. Karofeld, G. Le Roux, J. Loisel, R. Moschen, J. E. Nichols, T. M. Nieminen, G. M. MacDonald, N. R. Phadtare, N. Rausch, Ü. Sillasoo, G. T. Swindles, E.-S. Tuittila, L. Ukonmaanaho, M. Väliranta, S. van Bellen, B. van Geel, D. H. Vitt, and Y. Zhao
Biogeosciences, 10, 929–944, https://doi.org/10.5194/bg-10-929-2013, https://doi.org/10.5194/bg-10-929-2013, 2013
B. Van Bocxlaer, W. Salenbien, N. Praet, and J. Verniers
Biogeosciences, 9, 4497–4512, https://doi.org/10.5194/bg-9-4497-2012, https://doi.org/10.5194/bg-9-4497-2012, 2012
D. Hippler, N. Hu, M. Steiner, G. Scholtz, and G. Franz
Biogeosciences, 9, 1765–1775, https://doi.org/10.5194/bg-9-1765-2012, https://doi.org/10.5194/bg-9-1765-2012, 2012
J. M. Reed, A. Cvetkoska, Z. Levkov, H. Vogel, and B. Wagner
Biogeosciences, 7, 3083–3094, https://doi.org/10.5194/bg-7-3083-2010, https://doi.org/10.5194/bg-7-3083-2010, 2010
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