Thorsten Stoeck

University of Kaiserslautern

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Micah Dunthorn

University of Oslo

Dominik Forster

University of Kaiserslautern

Sabine Filker

Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau

Stéphane Audic

Centre National de la Recherche Scientifique

Sarah Romac

Sorbonne Université

Wilhelm Foissner

University of Salzburg

Lucie Bittner

École Pratique des Hautes Études

Hans‐Werner Breiner

University of Kaiserslautern

ÉB

Éric Bapteste

Institut de Systématique, Évolution, Biodiversité

Philippe Lopez

Institut de Systématique, Évolution, Biodiversité

Cooperative Institutions

University of Kaiserslautern

Centre National de la Recherche Scientifique

Ocean University of China

Chinese Academy of Sciences

Sorbonne Université

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

University of Geneva

Universität Innsbruck

Station Biologique de Roscoff

Qingdao National Laboratory for Marine Science and Technology

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Morphology of Bromeliophrya quadristicha n. spec., an Inhabitant of Tank Bromeliads (Bromeliaceae), and Phylogeny of the Bromeliophryidae (Ciliophora, Tetrahymenida)

Journal of Eukaryotic Microbiology (2013)

Wilhelm Foissner Thorsten Stoeck

Abstract Using morphological, morphometric, and molecular methods, we describe B romeliophrya quadristicha n. spec. from tank bromeliads of J amaica and the D ominican R epublic. The new species differs from the single congener, B . brasiliensis , mainly in having four (vs. 2) left lateral kinetofragments, 23 (vs. 32) ciliary rows, and a short (vs. long and C‐shaped) adoral membranelle 3. Both the morphological and molecular phylogenies show B romeliophrya and G laucomides as sister group of the G laucomidae. Thus, they should have the same (family) rank.

10.1111/jeu.12020

Cite

Citations (7)

The Chaos Prevails: Molecular Phylogeny of the Haptoria (Ciliophora, Litostomatea)

Protist (2013)

Peter Vďačný Hans‐Werner Breiner Varvara Yashchenko Micah Dunthorn Thorsten Stoeck

Molecular Phylogenetics

10.1016/j.protis.2013.11.001

Cite

Citations (52)

A New Record of Oxytricha granulifera granulifera Foissner and Adam, 1983 (Protozoa, Ciliophora, Oxytrichidae) From a Hot Spring in Iceland, With Notes on Its Abnormal Form During Cultivation

Frontiers in Marine Science (2021)

Rong Zhu Zhishuai Qu Qi Zhang Sabine Filker Thorsten Stoeck

We isolated a population of Oxytricha granulifera granulifera Foissner and Adam (1983) from a hot spring in Iceland. The pure culture of this isolate was established at room temperature in the laboratory. This allowed for a detailed investigation, informed by integrated approaches, of the isolate’s morphology and morphogenesis, as well as molecular phylogeny. Results showed that the morphological and morphogenetic characteristics of the Iceland population are consistent with those of other populations. During the 3-year long period of laboratory cultivation, some abnormal individuals appeared repeatedly in the culture system. Interestingly, the morphological characteristics of these abnormal cells were rather stable, and were as follows: 1) body slender and elliptical-shaped; 2) remarkably shortened adoral zone and significantly reduced number of adoral membranelles; and 3) loss of undulating membranes. Resting cysts, binary fission and conjugate reproduction were not found in abnormal specimens. Although the morphology of abnormal individuals changed significantly, the sequences of the SSU rDNA of the normal and abnormal morphotypes were the same. Phylogenetic analyses showed that the two morphotypes clustered in a clade with other populations of O. granulifera granulifera .

Morphology

10.3389/fmars.2021.621349

Cite

Citations (7)

Morphology, Ultrastructure, Molecular Phylogeny, and Autecology of Euplotes elegans Kahl, 1932 (Hypotrichida; Euplotidae) Isolated from the Anoxic Mariager Fjord, Denmark

Journal of Eukaryotic Microbiology (2007)

Martin Schwarz Alexandra Zuendorf Thorsten Stoeck

ABSTRACT. The morphology, autecology, and molecular phylogeny of an euryhaline Euplotes isolate collected from the anoxic water column of the Mariager Fjord in Denmark were investigated. The isolate matches the original description of Euplotes elegans Kahl, 1932 very well. However, its dorsal silverline system is clearly distinct from the redescription of this species by Tuffrau. Thus, a neotypification is proposed for E. elegans Kahl, 1932. The oval‐shaped cell has a mean size of 107 × 51 μm and is characterized by 9.4 dorsolateral kineties, seven prominent dorsal ridges, large elongated ampullae, which encircle the dorsal kinetids, 18 kinetids in the middorsal row, nine frontoventral cirri, five transversal cirri, and three caudal cirri (two right caudal cirri and one left marginal cirrus). The dorsal silverline system is of the double type with the narrow polygons located on the right side of the dorsal kinetids. The ecological tolerances of this species to pH, salinity, temperature, and oxygen match the ambient environmental conditions of the sampling site. Molecular phylogeny was studied using small subunit rRNA (SSU rRNA) gene sequences. The molecular data cluster E. elegans with Euplotes raikovi , a member of the Euplotopsis group. The data suggest that the E. elegans – E. raikovi clade represents an isolated and deep branch at the base of the Euplotes tree.

Molecular Phylogenetics

Fjord

Euryhaline

10.1111/j.1550-7408.2007.00243.x

Cite

Citations (35)

Tritirachium candoliense sp. nov., a novel basidiomycetous fungus isolated from the anoxic zone of the Arabian Sea

Fungal Biology (2013)

Cathrine Sumathi Manohar Teun Boekhout Wally H. Müller Thorsten Stoeck

10.1016/j.funbio.2013.10.010

Cite

Citations (19)

Comparing sediment preservation methods for genomic biomonitoring of coastal marine ecosystems

Marine Pollution Bulletin (2021)

Verena Dully Giulia Rech Thomas A. Wilding Anders Lanzén Kate MacKichan

Environmental DNA

Bioindicator

10.1016/j.marpolbul.2021.113129

Cite

Citations (13)

A fundamental difference between macrobiota and microbial eukaryotes: protistan plankton has a species maximum in the freshwater‐marine transition zone of the Baltic Sea

Environmental Microbiology (2018)

Sabine Filker Steffen Kühner Melanie J. Heckwolf Jan Dierking Thorsten Stoeck

Summary Remane's Artenminimum at the horohalinicum is a fundamental concept in ecology to describe and explain the distribution of organisms along salinity gradients. However, a recent metadata analysis challenged this concept for protists, proposing a species maximum in brackish waters. Due to data bias, this literature‐based investigation was highly discussed. Reliable data verifying or rejecting the species minimum for protists in brackish waters were critically lacking. Here, we sampled a pronounced salinity gradient along a west–east transect in the Baltic Sea and analysed protistan plankton communities using high‐throughput eDNA metabarcoding. A strong salinity barrier at the upper limit of the horohalinicum and 10 psu appeared to select for significant shifts in protistan community structures, with dinoflagellates being dominant at lower salinities, and dictyochophytes and diatoms being keyplayers at higher salinities. Also in vertical water column gradients in deeper basins (Kiel Bight, Arkona and Bornholm Basin) appeared salinity as significant environmental determinant influencing alpha‐ and beta‐diversity patterns. Importantly, alpha‐diversity indices revealed species maxima in brackish waters, that is, indeed contrasting Remane's Artenminimum concept. Statistical analyses confirmed salinity as the major driving force for protistan community structuring with high significance. This suggests that macrobiota and microbial eukaryotes follow fundamentally different rules regarding diversity patterns in the transition zone from freshwater to marine waters.

10.1111/1462-2920.14502

Cite

Citations (25)

Peer Review #1 of "Comparing quantile regression spline analyses and supervised machine learning for environmental quality assessment at coastal marine aquaculture installations (v0.1)"

Κλεοπάτρα Λεοντίδου Verena Rubel Thorsten Stoeck

Organic enrichment associated with marine finfish aquaculture is a local stressor of marine coastal ecosystems.To maintain ecosystem services, the implementation of biomonitoring programs focusing on benthic diversity is required.Traditionally, impact-indices are determined by extracting and identifying benthic macroinvertebrates from samples.However, this is a time-consuming and expensive method with low upscaling potential.A more rapid, inexpensive, and robust method to infer the environmental quality of marine environments is eDNA metabarcoding of bacterial communities.To infer the environmental quality of coastal habitats from metabarcoding data, two taxonomy-free approaches have been successfully applied for different geographical regions and monitoring goals, namely Quantile Regression Splines (QRS) and Supervised Machine Learning (SML).However, their comparative performance remains untested for monitoring the impact of organic enrichment introduced by aquaculture on marine coastal environments.We compared the performance of QRS and SML using bacterial metabarcoding data to infer the environmental quality of 230 aquaculture samples collected from seven farms in Norway and seven farms in Scotland along an organic enrichment gradient.As a measure of environmental quality, we used the Infaunal Quality Index (IQI) calculated from benthic macrofauna data (reference index).The QRS analysis plotted the abundance of Amplicon Sequence Variants (ASVs) as a function to the IQI from which the ASVs with a defined abundance peak were assigned to Eco-groups and a molecular IQI was subsequently calculated.In contrast, the SML approach built a random forest model to directly predict the macrofauna-based IQI.Our results show that both QRS and SML perform well in inferring the environmental quality with 89% and 90% accuracy, respectively.For both geographic regions, there was high correspondence between the reference IQI and both the inferred molecular IQIs (p<0.001), with the SML model showing a higher coefficient of determination compared to QRS.Among the 20 most important ASVs identified by the SML approach, 15 were congruent with the good quality spline ASV indicators identified via QRS

Quantile regression

Quantile

10.7287/peerj.15425v0.1/reviews/1

Cite

Citations (0)

Peer Review #3 of "Comparing quantile regression spline analyses and supervised machine learning for environmental quality assessment at coastal marine aquaculture installations (v0.1)"

Κλεοπάτρα Λεοντίδου Verena Rubel Thorsten Stoeck

Quantile regression

Quantile

Spline (mechanical)

10.7287/peerj.15425v0.1/reviews/3

Cite

Citations (0)

Environmental sequencing of marine protistan plankton communities reveals the effects of mesoscale cyclonic eddy transport on regional protistan diversity in subtropical offshore waters

Sven Nicolai Katzenmeier Maren Nothof Hans‐Werner Breiner Tim Fischer Thorsten Stoeck

Abstract. Mesoscale eddies which origin in Eastern Boundary Upwelling Systems (EBUS) such as the Canary Current System entrap nutrient rich coastal water and travel offshore while ageing. We have analyzed the protistan plankton community structures in the deep chlorophyll maximum (DCM), sub-DCM and oxygen minimum zone (OMZ) of three differently aged cyclonic EBUS eddies off Northwest Africa as well as of non-eddy affected reference sites using DNA metabarcoding. Throughout all water depths, we found that the investigated eddies generated local dispersal-driven hotspots of protistan plankton diversity in the naturally oligotrophic subtropical offshore waters off Northwest Africa. Based on the taxonomic composition of protistan plankton communities, these diversity hotspots are likely to play an important role in carbon sequestration and for regional food webs up to top predatory levels. Thereby, the life-span of an eddy emerged as an important criterion, how local offshore protistan plankton diversity is transformed quantitatively and qualitatively: each of the three eddies was characterized by notably distinct protistan plankton communities. This could be linked to the physicochemical water properties (predominantly macronutrients, temperature and salinity) of the eddies’ cores and rings, which experience pronounced changes during the eddies’ westward trajectories. Furthermore, we found evidence that eddy-specific deep-water protistan communities are relatively short-lived compared to the ones in the sunlit DCM. However, our results do not only witness from the importance of fine-scale physical ocean features for regional ecosystem processes, but they also show the complexity of these ocean features and that we are still far from understanding the biological processes and their driving forces in such features.

Eddy

10.5194/egusphere-2023-682

Cite

Citations (0)