8 Works

Biologic agents mediating matter-flow inside the porous igneous oceanic crust, Vesteris Seamount, Greenland Sea

Hinrich Schmid-Beurmann, Magnus Ivarsson, Wolfgang Bach, Wolf-Achim Kahl & Jörn Peckmann
Microorganisms within the lithosphere are biologic agents settling in niches inside the terrestrial and oceanic crust, populating the extreme environments of the deep biosphere. The fossil record of the permeable igneous oceanic crust, constructed out of primitive extrusive rock, opens a window into Earth’s early evolution and serves as an analogue for life in extraterrestrial worlds. In 2019, samples of highly porous basanites of Vesteris Seamount in the Greenland Sea were retrieved during a cruise...

Wild zebra finches are attracted towards acoustic cues from conspecific social groups

Corinna Adrian, Simon Griffith, Marc Naguib & Wiebke Schuett
Social information gathered by observing others often supplements personal information collected from direct interactions with the physical environment during decision making. Social information use may be particularly beneficial in harsh environments or if resources are distributed patchily, ephemeral and unpredictable, and hence difficult to locate. We experimentally tested the use of acoustic cues in wild zebra finches (Taeniopygia guttata) as they flew around their arid habitat as a way of locating conspecifics on the ground,...

Data from: Constraints on the evolution of toxin-resistant Na,K-ATPases have limited dependence on sequence divergence

Shabnam Mohammadi, Santiago Herrera-Álvarez, Lu Yang, María Del Pilar Rodríguez-Ordoñez, Karen Zhang, Jay F. Storz, Susanne Dobler, Andrew J. Crawford & Peter Andolfatto
A growing body of theoretical and experimental evidence suggests that intramolecular epistasis is a major determinant of rates and patterns of protein evolution and imposes a substantial constraint on the evolution of novel protein functions. Here, we examine the role of intramolecular epistasis in the recurrent evolution of resistance to cardiotonic steroids (CTS) across tetrapods, which occurs via specific amino acid substitutions to the α-subunit family of Na,K-ATPases (ATP1A). After identifying a series of recurrent...

Mesoscale stereo retrievals from Hunga Tonga-Hunga Ha’apai Eruption of 15 January 2022

James Carr, Akos Horvath, Dong Wu & Mariel Friberg
Stereo methods using GOES-17 and Himawari-8 applied to the Hunga Tonga-Hunga Ha’apai volcanic plume on 15 January 2022 show overshooting tops reaching 50-55 km altitude, a record in the satellite era. Plume height is important to understand dispersal and transport in the stratosphere and climate impacts. Stereo methods, using geostationary satellite pairs, offer the ability to accurately capture the evolution of plume top morphology quasi-continuously over long periods. Manual photogrammetry estimates plume height during the...

Small, odd and old: The mysterious Tarsius pumilus is the most basal Sulawesi tarsier

Laura Hagemann, Nanda Grow, Yvonne Bohr, Dyah Perwitasari-Farajallah, Yulius Duma, Sharon Gursky & Stefan Merker
In this study we present the first genetic evidence of the phylogenetic position of Tarsius pumilus, the mountain tarsier of Sulawesi, Indonesia. This mysterious primate is the only Eastern tarsier species that occurs exclusively in cloud forests above 1800 m asl. It exhibits striking morphological peculiarities – most prominently its extremely reduced body size, which led to the common name of “pygmy tarsier”. However, our results indicate that T. pumilus is not an aberrant form...

The impact of variable Fe concentrations on Fe-binding ligands, dissolved organics and microbial communities in hydrothermal plumes – an experimental study

Christian Tobias Hansen, Charlotte Kleint , Stefanie Böhnke , Lukas Klose , Nicole Adam , Katharina Sass, Mirjam Perner , Thorsten Dittmar & Andrea Koschinsky
Iron (Fe) plays an important role in aquatic environments as an essential, often biolimiting micronutrient but at very high concentrations can potentially be toxic. Consequently, microbes have evolved capabilities to influence Fe bioavailability through production of organic molecules, so called ligands, which can enhance iron bioavailability or be used for detoxification mechanisms. Hydrothermal vents represent a major source of Fe to the oceans and host specialized microbes that are likely capable of influencing Fe speciation...

What factors control the development of moats and their associated contourite drifts?

Henriette Wilckens , Elda Miramontes , Tilmann Schwenk , Thomas Lüdmann , Christian Betzler , Javier Hernandez-Molina , Volkhard Spieß & Antonio Cattaneo
The interaction of sedimentary systems with oceanographic processes in deep-water environments is still not well understood, despite its importance for improving paleoreconstructions and for understanding source-to-sink sediment transport. The aim of this study is to improve our understanding of sediment deposits formed by the action of bottom currents (contourites), and specifically elongated depressions that are called ‘moats’. Moats are common incisions oriented alongslope formed by the main core of the current and are usually associated...

Sexually but not parthenogenetically produced females benefit from mating in a stick insect

Nathan Burke & Russell Bonduriansky
In facultatively parthenogenetic populations, the prevalence of sexual reproduction depends on whether females mate and therefore produce sons and daughters or avoid mating and produce daughters only. The relative advantage of mating in such species may depend on a female’s own reproductive origin (i.e., development from a fertilised or unfertilised egg) if parthenogenesis reduces heterozygosity similarly to sexual inbreeding, or if it inhibits mating, sperm storage or fertilisation. But effects of reproductive origin on development...

Registration Year

  • 2022
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Affiliations

  • Universität Hamburg
    6
  • Universität Hamburg, Hamburg, Germany
    2
  • Universität Bremen, Bremen, Germany
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  • //ror.org/00f7hpc57:affiliation affiliationIdentifier="https://ror.org/04ers2y35" affiliationIdentifierScheme="ROR" schemeURI="https://ror.org">Universität Bremen, Bremen, Germany
    1
  • //ror.org/04g2vpn86:Royal Holloway University of London, Egham, Surrey, UK
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  • University of Sussex
    1
  • Columbia University
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  • Princeton University
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  • Goddard Space Flight Center
    1
  • Texas A&M University
    1