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Online-Ressource

Mortality selection during the 2003 European heat wave in three-spined sticklebacks: effects of parasites and MHC genotype (2008)

Wegner, K. Mathias

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In: BMC evolutionary biology, London : BioMed Central, 2001, 8(2008), 1471-2148

In: volume:8

In: year:2008

In: extent:12

Materialart: Online-Ressource

Seiten: 12 , graph. Darst

ISSN: 1471-2148

DOI: 10.1186/1471-2148-8-124

Sprache: Englisch

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Operational taxonomic unit table of Pacific oysters stemming from three oyster bed in the Northern Wadden Sea, part 1, OTU 1-3999 (2013)

Wegner, K Mathias ; Volkenborn, Nils ; Peter, Hannes ; [weitere]

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Publikationsdatum: 2023-03-16

Schlagwort(e): AWI_Coast; Coastal Ecology @ AWI; Date/Time of event; DB; Diedrichsenbank; Event label; HAND; Latitude of event; Longitude of event; Oddewatt; Operational taxonomic unit; OW; PK; Puan Klent; Sample code/label; Sampling by hand; Sylter Wattenmeer; Treatment

Materialart: Dataset

Format: text/tab-separated-values, 19782 data points

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Microsatellite genotypes of Pacific oysters stemming from three oyster bed in the Northern Wadden Sea (2013)

Wegner, K Mathias ; Volkenborn, Nils ; Peter, Hannes ; [weitere]

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Publikationsdatum: 2023-03-16

Schlagwort(e): Allele lengths locus; AWI_Coast; Coastal Ecology @ AWI; Date/Time of event; DB; Diedrichsenbank; Event label; HAND; Latitude of event; Longitude of event; Oddewatt; OW; PK; Puan Klent; Sample code/label; Sampling by hand; Sylter Wattenmeer; Treatment

Materialart: Dataset

Format: text/tab-separated-values, 435 data points

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Operational taxonomic unit table of Pacific oysters stemming from three oyster bed in the Northern Wadden Sea, part 2, OTU 4000-9339 (2013)

Wegner, K Mathias ; Volkenborn, Nils ; Peter, Hannes ; [weitere]

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Publikationsdatum: 2023-03-16

Schlagwort(e): AWI_Coast; Coastal Ecology @ AWI; Date/Time of event; DB; Diedrichsenbank; Event label; HAND; Latitude of event; Longitude of event; Oddewatt; Operational taxonomic unit; OW; PK; Puan Klent; Sample code/label; Sampling by hand; Sylter Wattenmeer; Treatment

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Format: text/tab-separated-values, 26628 data points

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Fig. 1a - Averaged monthly pH values recorded from 2009 to 2011 in the habitats of the two tested populations (2017)

Thomsen, Jörn ; Stapp, Laura ; Haynert, Kristin ; [weitere]

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In: GEOMAR - Helmholtz Centre for Ocean Research Kiel

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Publikationsdatum: 2023-03-14

Schlagwort(e): BIOACID; Biological Impacts of Ocean Acidification; Figure; Location; Month; pH; pH, standard deviation; Species; Type

Materialart: Dataset

Format: text/tab-separated-values, 168 data points

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Temperature, Salinity, pH, oxygen and chlorophyll measurements in the Oddewatt oyster reef in 2020 (2022)

Wegner, K Mathias

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In: Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven

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Publikationsdatum: 2023-03-16

Beschreibung: Temperature, Salinity, pH, oxygen and chlorophyll data was collected with a Hydrolab HL7 multi parameter sonde installed on an oyster table in the Oddewatt oyster reef in Königshafen, Sylt, Germany (55.028483, 8.433876). The table and sonde surface during low tide.

Schlagwort(e): abiotic parameters; Chlorophyll a; DATE/TIME; DEPTH, water; HydroLab HL7; Königshafen; Königshafen, Sylt, Germany; Oxygen, dissolved; Oxygen saturation; OysterBed_2020; pH; Salinity; Temperature, water; Waddensea

Materialart: Dataset

Format: text/tab-separated-values, 58880 data points

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Experiment: summer mortality phenomena in pacific oysters (2014)

Wendling, Carolin Charlotte ; Wegner, K Mathias

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In: Supplement to: Wendling, Carolin Charlotte; Wegner, K Mathias (2013): Relative contribution of reproductive investment, thermal stress and Vibrio infection to summer mortality phenomena in Pacific oysters. Aquaculture, 412-413, 88-96, https://doi.org/10.1016/j.aquaculture.2013.07.009

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Publikationsdatum: 2023-01-13

Beschreibung: Mass mortalities of Pacific oysters Crassostrea gigas occur regularly when temperatures are high. Elevated temperatures facilitate the proliferation and spread of pathogens and simultaneously impose physiological stress on the host. Additionally, periods of high temperatures coincide with the oyster spawning season. Spawning is energetically costly and can further compromise oyster immunity. Most studies monitoring the underlying factors of oyster summer mortality in the field, point to the involvement of abiotic and biotic factors including low salinities, high temperatures, pollutants, toxic algae blooms, pathogen exposure and physical stress in conjunction with maturation. However, studies addressing more than two factors experi- mentally are missing thus far. Therefore, we investigated the combination of three main factors including abiotic as well as internal and external biotic stressors by conducting controlled infection experiments on pre-and post-spawning as well as on gravid oysters with opportunistic Vibrio sp. at two different tempera- tures. Based on mortality rates, infection intensity and cellular immune parameters, we provide experimental evidence that all three factors (i.e. reproductive investment, elevated temperatures and infection with oppor- tunistic Vibrio sp.) act additively to the phenomenon of oyster summer mortality, leaving post-spawning oyster more susceptible to SMS than pre-spawning and gravid oysters. While previous studies found that post-spawning oysters have a lower thermal tolerance and a reduced ability to withstand pathogen infec- tions, our study now allows to separate the relative contribution of different causative agents to oyster sum- mer mortality and pinpoint to infection with pathogenic Vibrio sp. being of highest importance. In addition we can add a mechanistic understanding for the higher losses after spawning during which the phagocytic ability of hemocytes was strongly impeded resulting in insufficient clearance of pathogens.

Materialart: Dataset

Format: application/zip, 4 datasets

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Adaptation to enemy shifts: rapid resistance evolution to local Vibrio spp. in invasive Pacific oysters (2014)

Wendling, Carolin Charlotte ; Wegner, K Mathias

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In: Supplement to: Wendling, Carolin Charlotte; Wegner, K Mathias (2015): Adaptation to enemy shifts: rapid resistance evolution to local Vibrio spp. in invasive Pacific oysters. in preparation, Proceedings of the Royal Society B-Biological Sciences, 282(1804), 20142244-20142244, https://doi.org/10.1098/rspb.2014.2244

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Publikationsdatum: 2023-01-13

Beschreibung: One hypothesis for the success of invasive species is reduced pathogen burden, resulting from a release from infections or high immunological fitness (low immunopathology) of invaders. Despite of strong selection exerted on the host, the evolutionary response of invaders to newly acquired pathogens has rarely been considered. The two independent and genetically distinct invasions of the Pacific oyster Crassostrea gigas into the North Sea represent an ideal model system to study fast evolutionary responses of invasive populations. By exposing both invasion sources to ubiquitous and phylogenetically diverse pathogens (Vibrio spp.) we demonstrate that within a few generations hosts adapted to sympatric pathogen communities. However, this local adaptation only became apparent in selective environments, i.e. at elevated temperatures reflecting patterns of disease outbreaks in natural populations. Resistance against sympatric and allopatric Vibrio spp. strains was dominantly inherited in crosses between both invasion sources, resulting in an overall higher resistance of admixed individuals than pure lines. Therefore we suggest that a simple genetic resistance mechanism of the host is matched to a common virulence mechanism shared by local Vibrio strains. This combination might have facilitated a fast evolutionary response that can explain another dimension of why invasive species can be so successful in newly invaded ranges.

Materialart: Dataset

Format: application/zip, 4 datasets

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Pacific oyster survival, size and microsatellite data measured during infection experiments (2016)

Wendling, Carolin Charlotte ; Fabritzek, Armin Georg ; Wegner, K Mathias

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In: Supplement to: Wendling, Carolin Charlotte; Fabritzek, Armin Georg; Wegner, K Mathias (2017): Population-specific genotype x genotype x environment interactions in bacterial disease of early life stages of Pacific oyster larvae. Evolutionary Applications, 10(4), 338-347, https://doi.org/10.1111/eva.12452

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Publikationsdatum: 2023-01-13

Beschreibung: The consequences of emerging marine diseases on the evolutionary trajectories of affected host populations in the marine realm are largely unexplored. Evolution in response to natural selection depends on the genetic variation of the traits under selection and the interaction of these traits with the environment (GxE). However, in the case of diseases, genotypes of pathogens add another dimension to this interaction. Therefore, the study of disease resistance needs to be extended to the interaction of host genotype, pathogen genotype and environment (GxGxE). In the present study we used a full-sib breeding design crossing two genetically differentiated populations of the Pacific oyster Crassostrea gigas (Thunberg, 1793), to determine the influence of host genotype, pathogen genotype and temperature on disease resistance. Based on a controlled infection experiment on two early life stages, i.e. D-larvae and Pediveliger larvae at elevated and ambient water temperatures we estimated disease resistance to allopatric and sympatric Vibrio sp. by measuring survival and growth within and between genetically differentiated oyster populations. In both populations survival was higher upon infection with sympatric Vibrio sp. indicating that disease resistance has a genetic basis and is dependent on host genotype. In addition we observed a significant GxGxE effect in D-larvae, where contrary to expectations, disease resistance was higher at warm than at cold temperatures. Using thermal reaction norms, we could further show, that disease resistance is an environment dependent trait with high plasticity, which indicates the potential for a fast acclimatization to changing environmental conditions. These population specific reaction norms disappeared in hybrid crosses between both populations which demonstrates that admixture between genetically differentiated populations can influence GxGxE interactions on larger scales.

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Format: application/zip, 3 datasets

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Hemocyte and survival data of blue mussel Mytilus edulis infected by Mytilicola intestinalis (2018)

Demann, Felicitas ; Wegner, K Mathias

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In: Supplement to: Demann, Felicitas; Wegner, K Mathias (2018): Infection by invasive parasites increases susceptibility of native hosts to secondary infection via modulation of cellular immunity. Journal of Animal Ecology, 88(3), 427-438, https://doi.org/10.1111/1365-2656.12939

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Publikationsdatum: 2023-01-13

Beschreibung: Blue mussel Mytilus edulis were infected by Mytilicola intestinalis in a full factorial experimental design combining the following treatments: Mytilicola infection treatment (M_infect: infected with Mytilicola, M_control: not infected with Mytilicola) Vibrio infection treatment (V_bath: bathing challenge, V_inject: injection challenge, V_control: no vibrio infection) Temperature treatment (values 17: ambient, 21: elevated) Response variables were: composition of hemolymph cell types (granulocytes, hyalinocytes, blast-like cells) phagocytosis activity of each cell type Vibrio load in the hemolymph measured as colony forming units on TCBS agar in 5 µl of hemolmyph after 24h of growth at room temperature.

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Format: application/zip, 2 datasets

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