19 Works

Data and code from: Growth strategies of a model picoplankter depend on social milieu and pCO2

C-Elisa Schaum & Sinead Collins
Aquatic microbial primary producers exist in genetically diverse populations, but are often studied as single lineages, so that interpreting single lineage studies relies critically on understanding how microbial growth differs with social milieu. The properties of lineages grown alone often fail to predict the growth of these same lineages in the presence of conspecifics, and this discrepancy points towards an opportunity to improve our understanding of how multilineage assemblages of a species are shaped. We...

Geometric morphometric wing analysis represents a robust tool to identify female mosquitoes (Diptera: Culicidae) in Germany

Felix Gregor Sauer, Linda Jaworski, Laura Erdbeer, Anna Heitmann, Jonas Schmidt-Chanasit, Ellen Kiel & Renke Lühken
Accurate species identification is the prerequisite to assess the relevance of mosquito specimens, but is often hindered by missing or damaged morphological features. The present study analyses the applicability of wing geometric morphometrics as a low-cost and practical alternative to identify native mosquitoes in Germany. Wing pictures were collected for 502 female mosquitoes of five genera and 19 species from 80 sampling sites. The reliable species identification based on interspecific wing geometry of 18 landmarks...

Insights into the genetic basis of predator-induced response in Daphnia galeata

Verena Tams, Jana Helene Nickel, Anne Ehring & Mathilde Cordellier
Phenotypic plastic responses allow organisms to rapidly adjust when facing environmental challenges - these responses comprise morphological, behavioral but also life-history changes. Alteration of life-history traits when exposed to predation risk have been reported often in the ecological and genomic model organism Daphnia. However, the molecular basis of this response is not well understood, especially in the context of fish predation. Here, we characterized the transcriptional profiles of two Daphnia galeata clonal lines with opposed...

Telychian Bryozoa, Matrix (Bryozoans from the lower Silurian (Telychian) Hanchiatien Formation from southern Chongqing, South China)

Andrej Ernst
Eight bryozoan species are described from the Hanchiatien Formation (lower Silurian, Telychian) of southern Chongqing, South China. Four species are new: the trepostomes Asperopora sinensis n. sp., Trematopora jiebeiensis n. sp., and Trematopora tenuis n. sp., and the fenestrate Moorephylloporina parvula n. sp. One species, a cystoporate Hennigopora sp. is described in open nomenclature. Moorephylloporina parvula n. sp. is eurytopic, occurring in all types of facies within the bioherms. Erect Moorephylloporina, Trematopora and Leioclema form...

Phylogenomic resolution of sea spider diversification through integration of multiple data classes

Jesus Ballesteros, Emily Setton, Carlos Santibáñez-López, Claudia Arango, Georg Brenneis, Saskia Brix, Kevin Corbett, Esperanza Cano-Sánchez, Merai Dandouch, Geoffrey Dilly, Marc Eleaume, Guilherme Gainett, Cyril Gallut, Sean McAtee, Lauren McIntyre, Randy Moran, Pablo López-González, Gerhard Scholtz, Clay Williamson, Arthur Woods, Jakob Zehms, Ward Wheeler & Prashant Sharma
Despite significant advances in invertebrate phylogenomics over the past decade, the higher-level phylogeny of Pycnogonida (sea spiders) remains elusive. Due to the inaccessibility of some small-bodied lineages, few phylogenetic studies have sampled all sea spider families. Previous efforts based on a handful of genes have yielded unstable tree topologies. Here, we inferred the relationships of 89 sea spider species using targeted capture of the mitochondrial genome, 56 conserved exons, 101 ultraconserved elements, and three nuclear...

Biased predation could promote convergence yet maintain diversity within Müllerian mimicry rings of Oreina leaf beetles

David Kikuchi, Samuel Waldron, Janne Valkonen, Susanne Dobler & Johanna Mappes
Müllerian mimicry is a classic example of adaptation, yet Müller’s original theory does not account for the persistence of diversity in mimicry rings, which has been a thorn in the side of one of the oldest models in evolutionary biology. Here, we aimed to assess how well classical Müllerian mimicry can account for the color polymorphism found in chemically defended Oreina leaf beetles, specifically testing its predictions for predator behavior. We also evaluated whether thermoregulation...

Assessing the diachronic change of a word-formation pattern

Stefan Hartmann &
This paper investigates the diachronic change of ung-nominalization in German using both simple frequency measures and advanced models of morphological productivity.

Data from: ‘In and out of’ the Qinghai-Tibet Plateau and the Himalayas: centers of origin and diversification compared across five clades of Eurasian montane and alpine passerine birds

Martin Päckert, Adrien Favre, Jan Schnitzler, Jochen Martens, Yue-Hua Sun, Dieter Thomas Tietze, Frank Hailer, Ingo Michalak & Patrick Strutzenberger
Encompassing some of the major hotspots of biodiversity on Earth, large mountain systems have long held the attention of evolutionary biologists. The region of the Qinghai-Tibet Plateau (QTP) is considered a biogeographic source for multiple colonization events into adjacent areas including the northern Palearctic. The faunal exchange between the QTP and adjacent regions could thus represent a one-way street (‘out of’ the QTP). However, immigration into the QTP region has so far received only little...

Functional redundancy in natural pico-phytoplankton communities depends on temperature and biogeography

C-Elisa Schaum
Biodiversity affects ecosystem function, and how this relationship will change in a warming world is a major and well-examined question in ecology. Yet, it remains understudied for pico-phytoplankton communities, which contribute to carbon cycles and aquatic food webs year-round. Observational studies show a link between phytoplankton community diversity and ecosystem stability, but there is only scarce causal or empirical evidence. Here, we sampled phytoplankton communities from two geographically related regions with distinct thermal and biological...

Data from: With a little help from my friends – Physiological integration facilitates invasion of wetland grass Elymus athericus into flooded soils

Peter Mueller, Hai T. Do, Christian Smit, Christoph Reisdorff, Kai Jensen & Stefanie Nolte
Tidal wetlands worldwide are undergoing rapid invasions by tall-growing clonal grasses. Prominent examples are invasions by species of the genera Spartina, Phragmites, and Elymus. The responsible physiological and ecological drivers of these invasions are poorly understood. Physiological integration (PI) is a key trait of clonal plants, which enables the exchange of resources among ramets. We investigated PI in Elymus athericus, which has been rapidly spreading from high-marsh into low-marsh environments of European salt marshes during...

Impact Free Journal für freie Bildungswissenschaftler

Peter Tremp & Gabi Reinmann

Beta maṣāḥǝft TEI-XML Data

Pietro Maria Liuzzo, Dorothea Reule & Gebreyes Beyene Solomon

19NEUNZEHN

„19NEUNZEHN“ ist das offizielle Magazin der Universität Hamburg für Studierende. Es ist nach dem Gründungsjahr der Universität benannt und präsentiert das breite Themenspektrum des universitären Umfelds in modernem Layout. Unterteilt in die fünf Hauptrubriken Campus & Co, Forschen & Verstehen, Hin & Weg, Studium & Dann und Heute & Damals bietet 19NEUNZEHN interessante Artikel und Interviews für alle, die den Blick über die Grenzen des eigenen Fachbereichs hinaus richten möchten.

Unpacking intersectionalities: On boundaries and culture in Javanese friendships

Eric Anton Heuser
In this article I focus on the philosophical ideals behind Javanese friendships as a central form of local sociality. I critically examine the history of friendship within anthropology and argue that a particular historical development of anthropological epistemologies is partly responsible for marginalising social-philosophical friendship historiographies from the Global South. This is followed by an investigation of some of the intersections between certain forms of relationships that are constituent for Javanese friendships, which rest on...

Finds from Miletus XXXII. Clay Rings from the Sanctuary of Dionysos in Miletus

Lisa Steinmann
During its excavation in the 1970s, a large number of unidentifiable objects were found in the sanctuary of Dionysos in Miletus: »Peculiar and as of now not explicable for the editor [Willi Real] are numerous fragments of flat rings […]. They are reminiscent of the rings used for modern coal stoves. […] Hitherto no interpretation has been found.« (Real 1977, 105). In the course of a re-examination of the excavation’s findings since 2017, it has...

Det tør!: Frozen-Ground Cartoons; Et international samarbejde mellem kunstnere og permafrostforskere

Heta Nääs, Noémie Ross, Frédéric Bouchard, Michelle Paquette, Audrey Veillette, Michael Fritz, Stefanie Weege, Julie Malenfant-Lepage, Bethany Deshpande, Alexander Nieuwendam, Ashley Rudy, Matthias Siewert, Ylva Sjöberg, Jonathan Harbor, J. Otto Habeck, Kerstin Krøier Rasmussen & Kirstey Langley
This project started in October 2015 with a crazy idea : prepare and submit a funding application for an international, multidisciplinary and non-traditional scientific outreach project… within the next 48 hours. Well, it worked out. A group of highly motivated young researchers from Canada and Europe united to combine arts and science and produce a series of outreach comic strips about permafrost (frozen ground). The aim of the project is to present and explain scientific...

Data from: Testing multiple drivers of the temperature-size rule with nonlinear temperature increase

Andrea Tabi, Aurélie Garnier & Frank Pennekamp
The temperature-size rule (TSR) describes the inverse relationship between organism size and environmental temperature in uni- and multicellular species. Despite the TSR being widespread, the mechanisms for shrinking body size with warming remain elusive. Here, we experimentally test three hypotheses (differential development and growth [DDG], maintain aerobic scope and regulate oxygen supply [MASROS] and the supply-demand hypothesis [SD]) potentially explaining the TSR using the aquatic protist Colpidium striatum in three gradually changing and one constant...

Dataset: Tropical bats counter heat by combining torpor with adaptive hyperthermia

Stephanie Reher & Kathrin Dausmann
Many tropical mammals are vulnerable to heat because their water budget limits the use of evaporative cooling for heat compensation. Further increasing temperatures and aridity might consequently exceed their thermoregulatory capacities. Here, we describe two novel modes of torpor, a response usually associated with cold or resource bottlenecks, as efficient mechanisms to counter heat. We conducted a field study on the Malagasy bat Macronycteris commersoni resting in foliage during the hot season, unprotected from environmental...

Registration Year

  • 2020
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Affiliations

  • Universität Hamburg
    13
  • University of Hamburg
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  • University of Montana
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  • Universität Hamburg, Archäologie und Kulturgeschichte des antiken Mittelmeerraumes
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  • University of Lucerne
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    1
  • Senckenberg Nature Research Society
    1
  • University of Groningen
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  • University of Montreal
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