81 Works

Macrozoobenthos biomass in surface sediments of R/V Alkor cruise AL519/1

Finn Mielck & Werner Armonies

Water temperature at time series station Liliguapi, Paso Comau, Patagonia, Chile in 2017/2018

Jürgen Laudien, Verena Häussermann & Günter Försterra
Comau Fjord, Northern Patagonia, Chile is a core monitoring area to reveal the impact of climate change on benthic cold-water communities. In order to record the water temperature at shallow cold-water coral banks, several long-term stations have been established in 2009. This data set provides the water temperature logged at an interval of 15 min at the station Liliguapi in a depth of 18 m between 2017-01-21 and 2018-04-18.

Repositories for taxonomic data: Where we are and what is missing

Aurélien Miralles, Teddy Bruy, Katherine Wolcott, Mark Scherz, Dominik Begerow, Bank Beszteri, Michael Bonkowski, Janine Felden, Birgit Gemeinholzer, Frank Glaw, Frank Oliver Glöckner, Oliver Hawlitschek, Ivaylo Kostadinov, Tim Nattkemper, Christian Printzen, Jasmin Renz, Nataliya Rybalka, Marc Stadler, Tanja Weibulat, Thomas Wilke, Susanne Renner & Miguel Vences
Natural history collections are leading successful large-scale projects of specimen digitization (images, metadata, DNA barcodes), transforming taxonomy into a big data science. Yet, little effort has been directed towards safeguarding and subsequently mobilizing the considerable amount of original data generated during the process of naming 15–20,000 species every year. From the perspective of alpha-taxonomists, we provide a review of the properties and diversity of taxonomic data, assess their volume and use, and establish criteria for...

Data from: Phylogenetic diversity and environment form assembly rules for Arctic diatom genera—a study on recent and ancient sedimentary DNA

Kathleen R. Stoof-Leichsenring, Luidmila A. Pestryakova, Laura S. Epp & Ulrike Herzschuh
Aim This study investigates taxonomic and phylogenetic diversity in diatom genera to evaluate assembly rules for eukaryotic microbes across the Siberian treeline. We first analysed how phylogenetic distance relates to taxonomic richness and turnover. Second, we used relatedness indices to evaluate if environmental filtering or competition influences the assemblies in space and through time. Third, we used distance-based ordination to test which environmental variables shape diatom turnover. Location Yakutia and Taymyria, Russia: we sampled 78...

Data from: Effects of warming rate, acclimation temperature and ontogeny on the critical thermal maximum of temperate marine fish larvae

Marta Moyano, Caroline Candebat, Yannick Ruhbaum, Santiago Álvarez-Fernández, Guy Claireaux, José-Luis Zambonino-Infante & Myron A. Peck
Most of the thermal tolerance studies on fish have been performed on juveniles and adults, whereas limited information is available for larvae, a stage which may have a particularly narrow range in tolerable temperatures. Moreover, previous studies on thermal limits for marine and freshwater fish larvae (53 studies reviewed here) applied a wide range of methodologies (e.g. the static or dynamic method, different exposure times), making it challenging to compare across taxa. We measured the...

Data from: Idiosyncratic species effects confound size-based predictions of responses to climate change

Marion Twomey, Eva Brodte, Ute Jacob, Ulrich Brose, Tasman P. Crowe & Mark C. Emmerson
Understanding and predicting the consequences of warming for complex ecosystems and indeed individual species remains a major ecological challenge. Here, we investigated the effect of increased seawater temperatures on the metabolic and consumption rates of five distinct marine species. The experimental species reflected different trophic positions within a typical benthic East Atlantic food web, and included a herbivorous gastropod, a scavenging decapod, a predatory echinoderm, a decapod and a benthic-feeding fish. We examined the metabolism–body...

Evolution and phylogeny of the deep-sea isopod families Desmosomatidae Sars, 1897 and Nannoniscidae Hansen, 1916 (Isopoda: Asellota)

Robert Jennings, Saskia Brix, Christoph Held, Stefanie Kaiser, Amy Driskell & Angelika Brandt
In the deep sea, the phylogeny and biogeography of only a few taxa have been well studied. Although more than 200 species in 32 genera have been described for the asellote isopod families Desmosomatidae Sars, 1897 and Nannoniscidae Hansen, 1916 from all ocean basins, their phylogenetic relationships are not completely understood. There is little doubt about the close relationship of these families, but the taxonomic position of a number of genera is so far unknown....

Plant DNA metabarcoding records from three cores of lacustrine lakes along a open larch forest-forest tundra-tundra transect at the Omoloy region, north-eastern Siberia

Sisi Liu, Kathleen R. Stoof-Leichsenring, Stefan Kruse, Luidmila A. Pestryakova & Ulrike Herzschuh
Here, we provide the raw plant DNA metabarcoding data archived in three Siberian lake sediment cores spanning the mid-Holocene to the present (7.6-0 cal ka BP), from northern typical tundra to southern open larch forest in the Omoloy region. There are three cores: 14-OM-20B, Lat. / °: 70.53, Lon. / °: 132.91, Ele. / m a.s.l.: 52, Modern vegetation: open larch forest, Lake area / km2: 0.26, Maximal depth / m: 3.4 14-OM-02B, Lat. /...

Circum-Arctic distribution of chemical anti-herbivore compounds arctic shrubs

Elin Lindén, Mariska Te Beest, Ilka Abreu, Thomas Moritz, Maja Sundqvist, Isabel C Barrio, Julia Boike, John Bryant, Kari Anne Bråthen, Agata Buchwal, Guillermo Bueno, Alain Cuerrier, Dagmar Egelkraut, Bruce Forbes, Martin Hallinger, Monique Heijmans, Luise Hermanutz, David S Hik, Annika Hofgaard, Milena Holmgren, Diane C Huebner, Toke Hoye, Ingibjörg Jónsdóttir, Elina Kaarlejärvi, Emilie Kissler … & Johan Olofsson
Spatial variation in plant chemical defence towards herbivores can help us understand variation in herbivore top-down control of shrubs in the Arctic and possibly also shrub responses to global warming. Less defended, non-resinous shrubs could be more influenced by herbivores than more defended, resinous shrubs. However, sparse field measurements limit our current understanding of how much of the circum-Arctic variation in defence compounds is explained by taxa or defence functional groups (resinous/non-resinous). We measured circum-Arctic...

High-resolution bathymetry models for the Lena Delta and the Kolyma Gulf regions

Matthias Fuchs, Juri Palmtag, Bennet Juhls, Pier Paul Overduin, Guido Grosse, Ahmed Abdelwahab, Michael Bedington, Tina Sanders, Olga Ogneva, Irina V Fedorova, Nikita S Zimov, Paul James Mann & Jens Strauss
This data set includes spatial high-resolution bathymetry data sets for the Lena Delta and Kolyma Gulf regions. Based on large-scale current and historical nautical maps, depth points and isobaths lines were manually digitized and served as input data for the bathymetry models. The models were calculated with the topo to raster tool in ArcGIS TM version 10.6 into a 50 m (TTR50) and a 200 m (TTR200) grid cell bathymetry for both regions. The models...

Data from: Parasites affect food web structure primarily through increased diversity and complexity

Jennifer A. Dunne, Kevin D. Lafferty, Andrew P. Dobson, Ryan F. Hechinger, Armand M. Kuris, Neo D. Martinez, John P. McLaughlin, Kim N. Mouritsen, Robert Poulin, Karsten Reise, Daniel B. Stouffer, David W. Thieltges, Richard J. Williams & Claus Dieter Zander
Comparative research on food web structure has revealed generalities in trophic organization, produced simple models, and allowed assessment of robustness to species loss. These studies have mostly focused on free-living species. Recent research has suggested that inclusion of parasites alters structure. We assess whether such changes in network structure result from unique roles and traits of parasites or from changes to diversity and complexity. We analyzed seven highly resolved food webs that include metazoan parasite...

Data from: Patterns and controlling factors of species diversity in the Arctic Ocean

Moriaki Yasuhara, Gene Hunt, Gert Van Dijken, Kevin R. Arrigo, Thomas M. Cronin & Jutta E. Wollenburg
AIM: The Arctic Ocean is one of the last near-pristine regions on Earth and although human activities are expected to impact on Arctic ecosystems, we know very little about baseline patterns of Arctic Ocean biodiversity. This paper aims to describe Arctic Ocean-wide patterns of benthic biodiversity and to explore factors related to the large-scale species diversity patterns. LOCATION: Arctic Ocean. METHODS: We used large ostracode and foraminiferal datasets to describe the biodiversity patterns and apply...

Data from: The model marine diatom Thalassiosira pseudonana likely descended from a freshwater ancestor in the genus Cyclotella

Andrew J Alverson, Bank Beszteri, Matthew L Julius & Edward C Theriot
BACKGROUND: Publication of the first diatom genome, that of Thalassiosira pseudonana, established it as a model species for experimental and genomic studies of diatoms. Virtually every ensuing study has treated T. pseudonana as a marine diatom, with genomic and experimental data valued for their insights into the ecology and evolution of diatoms in the world's oceans. RESULTS: The natural distribution of T. pseudonana spans both marine and fresh waters, and phylogenetic analyses of morphological and...

Data from: Consensus forecasting of intertidal seagrass habitat in the Wadden Sea

Eelke O. Folmer, Justus E. E. Van Beusekom, Tobias Dolch, Ulf Gräwe, Marieke M. Van Katwijk, Kerstin Kolbe, Catharina J. M. Philippart & Catharina J.M. Philippart
After the dramatic eutrophication-induced decline of intertidal seagrasses in the 1970s, the Wadden Sea has shown diverging developments. In the northern Wadden Sea, seagrass beds have expanded and become denser, while in the southern Wadden Sea, only small beds with low shoot densities are found. A lack of documentation of historical distributions hampers conservation management. Yet, the recovery in the northern Wadden Sea provides opportunity to construct robust habitat suitability models to support management. We...

Diatom sedimentary ancient DNA metabarcoding from western Fram Strait and Kronotsky Peninsula

Heike Zimmermann, Kathleen R. Stoof-Leichsenring, Stefan Kruse, Juliane Müller, Ruediger Stein, Ralf Tiedemann & Ulrike Herzschuh
In this study we use sedimentary ancient DNA metabarcoding from two marine sediment cores. The first Kastenlot core MSM05/5-712-2 was taken at western Fram Strait (subarctic North Atlantic) from which we collected 12 samples including one biological replicate. The second Kastenlot core SO201-2-12KL was retrieved from Kamchatka Strait (subarctic North Pacific) from which we collected 9 samples and 2 samples were collected from a pilot core taken next to the Kastenlot core. Total DNA was...

Genomic Standards Consortium (GSC) Island Sampling Day: Moorea Reef to Ridges Genomic Transect

Erin Robinson
Here we describe a project that supports the mission of the Genomic Standards Consortium (GSC) and contributes to the “Ocean Biomolecular Observations Network” (OBON) and the “Ocean Best Practice System” (OBPS - Omics Task Team), flagship programs of the UN Ocean Decade of Ocean Science for Sustainable Development. The project serves as a test case for two related infrastructure projects that aim to improve standards, policies, and best practices in sample collection: Sampling Nature (SN)...

Ancient sedimentary plant DNA and pollen dataset from Bolshoe Toko Lake, southeastern Siberia

Jérémy Courtin
Here we provide a dataset on genetic and pollen plant diversity retrieved from sedimentary ancient DNA (sedaDNA) of the Bolshoe Toko lake from southeastern Siberia. Our dataset encompasses sedaDNA sequence data of 54 lake sediment samples and pollen grain counts of 67 lake sediments samples. We used a PCR-based metabarcoding approach combined with Next-Generation Sequencing to assess the past, local plant diversity around the analysed lake localities. As a plant specific metabarcode we applied the...

Open Science Factsheet No. 4: based on the 59th online seminar: Research Data Management – a biodiverse MOSAiC

Frank Oliver Glöckner, Antonia Schrader, Nina Leonie Weisweiler & Lea Maria Ferguson

Macrozoobenthos abundances in surface sediments of R/V Alkor cruise AL519/1

Finn Mielck & Werner Armonies

Granulometry in surface sediments of R/V Alkor cruise AL519/1

Finn Mielck & Werner Armonies

Strategien zur Renaturierung von Abbaugebieten

Felix Janssen, Thomas Soltwedel & Matthias Haeckel
Mehr als 100.000 verschiedene Arten in den Ozeanen sind mittlerweile bekannt, die biologische Vielfalt ist jedoch noch weit größer und viele Arten noch nicht entdeckt. Gerade in der Tiefsee stößt man bei jeder Probenentnahme auf weitere unbekannte Arten. Belastbare Aussagen zu einer potentiellen Wiederbesiedelung abgebauter und gestörter Flächen können nur auf der Basis intensiver wissenschaftlicher Untersuchungen getroffen werden.

Diatoms and plants sedimentary ancient DNA from Lake Satagay (Central Yakutia, Siberia) covering the last 10,800 years

Izabella Baisheva, Luidmila Pestryakova, Ramesh Glückler, Ulrike Herzschuh & Kathleen R. Stoof-Leichsenring
Our dataset consists of two metabarcoding datasets (1) targeting diatoms (rbcL) and (2) targeting plant taxa (trnL P6 loop) retrieved from sedimentary ancient DNA (sedaDNA) of Lake Satagay, Central Yakutia, Siberia (N 63.07816°, E 117.99806°). SedaDNA data for diatoms comprises 65 samples (sequencing run number APMG-32), whereas 61 samples were analyzed for plants (sequencing run number APMG-33). We used sedaDNA of diatoms (APMG-32) and plants (data from APMG-33 restricted to aquatic plants) to reconstruct aquatic...

Helmholtz Open Science Briefing: Zweites Helmholtz Open Science Forum \"Helmholtz in der Nationalen Forschungsdateninfrastruktur (NFDI)\": Report

Nina Leonie Weisweiler, Roland Bertelmann, Constanze Curdt, Frank Oliver Glöckner, Uwe Jandt, Achim Streit, York Sure-Vetter & Nicolas Villacorta
Zur Förderung des Dialogs zur NFDI in der Helmholtz-Gemeinschaft veranstaltete das Helmholtz Open Science Office am 8. Dezember 2021 ein zweites virtuelles Helmholtz Open Science Forum unter dem Motto „Helmholtz in der Nationalen Forschungsdateninfrastruktur (NFDI)“. Alle Mitarbeitenden der Helmholtz-Gemeinschaft waren eingeladen, sich an dem zentrenübergreifenden Austausch zu beteiligen. Aufbauend auf das erste Forum im Mai 2021 lag der Schwerpunkt der Veranstaltung auf der Identifikation und Diskussion von Helmholtzspezifischen Themen und Aktivitäten bei der Realisierung der...

Abbau- und Managementstrategien

Felix Janssen, Thomas Soltwedel & Matthias Haeckel
Momentan wird erwartet, dass Schädigungen durch den Abbau reduziert werden können, wenn gestörte Flächen durch ungestörte Areale unterbrochen sind. Es besteht jedoch noch umfassender Forschungsbedarf, um wissenschaftlich fundierte Empfehlungen zu geeigneten Abbaustrategien zu geben. Es kann gegenwärtig noch nicht vorhergesagt werden, inwieweit diese geeignet sind, durch Tiefseebergbau verursachte Umweltfolgen abzumildern und irreversible Schädigungen abzuwenden.

Baseline-Studien für die Erkundungsgebiete. Wie tief reicht der Sauerstoff, was sind die Sedimentationsraten?

Sabine Kasten
Ohne die Kenntnisse der Sedimentationsbedingungen sowie der ökologischen und geochemischen Zustände in der Tiefsee können die Auswirkungen zukünftiger menschlicher Eingriffe in die Tiefsee nicht ermittelt werden. Insbesondere die Clarion-Clipperton Zone (CCZ) im äquatorialen Pazifik ist für den Manganknollen-Abbau potentiell interessant und Gegenstand der Untersuchungen.

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  • Alfred Wegener Institute for Polar and Marine Research
  • Helmholtz Association of German Research Centres
  • Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
  • GEOMAR Helmholtz Centre for Ocean Research Kiel
  • University of Bremen
  • Alfred Wegener Institute - Wadden Sea Station Sylt
  • University of Hamburg
  • University of Göttingen
  • North-Eastern Federal University
  • Carl von Ossietzky University of Oldenburg