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  • PANGAEA  (47)
  • Nature Publishing Group  (1)
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  • 1
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    Extensive phenotypic plasticity of a Red Sea coral over a strong latitudinal temperature gradient suggests limited acclimatization potential to warming (2015)
    Nature Publishing Group
    In:  Scientific Reports, 5 (8940).
    Details
    Publication Date: 2019-09-23
    Description: Global warming was reported to cause growth reductions in tropical shallow water corals in both, cooler and warmer, regions of the coral species range. This suggests regional adaptation with less heat-tolerant populations in cooler and more thermo-tolerant populations in warmer regions. Here, we investigated seasonal changes in the in situ metabolic performance of the widely distributed hermatypic coral Pocillopora verrucosa along 12 degrees latitudes featuring a steep temperature gradient between the northern (28.5 degrees N, 21-27 degrees C) and southern (16.5 degrees N, 28-33 degrees C) reaches of the Red Sea. Surprisingly, we found little indication for regional adaptation, but strong indications for high phenotypic plasticity: Calcification rates in two seasons (winter, summer) were found to be highest at 28-29 degrees C throughout all populations independent of their geographic location. Mucus release increased with temperature and nutrient supply, both being highest in the south. Genetic characterization of the coral host revealed low inter-regional variation and differences in the Symbiodinium clade composition only at the most northern and most southern region. This suggests variable acclimatization potential to ocean warming of coral populations across the Red Sea: high acclimatization potential in northern populations, but limited ability to cope with ocean warming in southern populations already existing at the upper thermal margin for corals
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1038/srep08940
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Performance data of the coral Pocillopora verrucosa and environmental conditions along the Saudi Arabian Red Sea coast as assessed during 3 expeditions in the years 2011 and 2012 (2014)
    PANGAEA
    In:  Supplement to: Wahl, Martin; Al Sofyani, Abdulmohsin; Saha, Mahasweta; Kruse, Inken; Lenz, Mark; Sawall, Yvonne (2014): Large Scale Patterns of Antimicrofouling Defenses in the Hard Coral Pocillopora verrucosa in an Environmental Gradient along the Saudi Arabian Coast of the Red Sea. PLoS ONE, 9(12), e106573, https://doi.org/10.1371/journal.pone.0106573
    Details
    Publication Date: 2024-03-06
    Description: Large scale patterns of ecologically relevant traits may help identify drivers of their variability and conditions beneficial or adverse to the expression of these traits. Antimicrofouling defenses in scleractinian corals regulate the establishment of the associated biofilm as well as the risks of infection. The Saudi Arabian Red Sea coast features a pronounced thermal and nutritional gradient including regions and seasons with potentially stressful conditions to corals. Assessing the patterns of antimicrofouling defenses across the Red Sea may hint at the susceptibility of corals to global change. We investigated microfouling pressure as well as the relative strength of 2 alternative antimicrofouling defenses (chemical antisettlement activity, mucus release) along the pronounced environmental gradient along the Saudi Arabian Red Sea coast in 2 successive years. Microfouling pressure was exceptionally low along most of the coast but sharply increased at the southernmost sites. Mucus release correlated with temperature. Chemical defense tended to anti-correlate with mucus release. As a result, the combined action of mucus release and chemical antimicrofouling defense seemed to warrant sufficient defense against microbes along the entire coast. In the future, however, we expect enhanced energetic strain on corals when warming and/or eutrophication lead to higher bacterial fouling pressure and a shift towards putatively more costly defense by mucus release.
    Type: Dataset
    Format: application/zip, 5 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Natural fluctuations and gradients in the experimental design:research bias in the field of ocean acidification (2014)
    PANGAEA
    In:  Supplement to: Wahl, Martin; Saderne, Vincent; Sawall, Yvonne (2016): How good are we at assessing the impact of ocean acidification in coastal systems? Limitations, omissions and strengths of commonly used experimental approaches with special emphasis on the neglected role of fluctuations. Marine and Freshwater Research, 67(1), 25, https://doi.org/10.1071/MF14154
    Details
    Publication Date: 2024-03-06
    Description: These data form the basis of an analysis of a prevalent research bias in the field of ocean acidification, notably the ignoring of natural fluctuations and gradients in the experimental design. The data are extracted from published work and own experiments.
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Metabolic rates and tissue composition of the coral Pocillopora verrucosa over 12 latitudes in the Red Sea characterized by strong temperature and nutrient gradient (2015)
    PANGAEA
    In:  Supplement to: Sawall, Yvonne; Al-Sofyani, A; Hohn, S; Banguera-Hinestroza, E; Voolstra, Christian R; Wahl, Martin (2015): Extensive phenotypic plasticity of a Red Sea coral over a strong latitudinal temperature gradient suggests limited acclimatization potential to warming. Scientific Reports, 5, 8940, https://doi.org/10.1038/srep08940
    Details
    Publication Date: 2024-03-06
    Description: Global warming was reported to cause growth reductions in tropical shallow water corals in both, cooler and warmer, regions of the coral species range. This suggests regional adaptation with less heat-tolerant populations in cooler and more thermo-tolerant populations in warmer regions. Here, we investigated seasonal changes in the in situ metabolic performance of the widely distributed hermatypic coral Pocillopora verrucosa along 12 degrees latitudes featuring a steep temperature gradient between the northern (28.5 degrees N, 21-27 degrees C) and southern (16.5 degrees N, 28-33 degrees C) reaches of the Red Sea. Surprisingly, we found little indication for regional adaptation, but strong indications for high phenotypic plasticity: Calcification rates in two seasons (winter, summer) were found to be highest at 28-29 degrees C throughout all populations independent of their geographic location. Mucus release increased with temperature and nutrient supply, both being highest in the south. Genetic characterization of the coral host revealed low inter-regional variation and differences in the Symbiodinium clade composition only at the most northern and most southern region. This suggests variable acclimatization potential to ocean warming of coral populations across the Red Sea: high acclimatization potential in northern populations, but limited ability to cope with ocean warming in southern populations already existing at the upper thermal margin for corals
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Chemical versus structural defense against fish predation in two dominant soft coral species (Xeniidae) in the Red Sea (2015)
    PANGAEA
    In:  Supplement to: Hoang, Ben Xuan; Sawall, Yvonne; Al-Sofyani, A; Wahl, Martin (2014): Chemical versus structural defense against fish predation in two dominant soft coral species (Xeniidae) in the Red Sea. Aquatic Biology, https://doi.org/10.3354/ab00614
    Details
    Publication Date: 2024-03-06
    Description: Soft corals of the family Xeniidae are particularly abundant in Red Sea coral reefs. Their success may be partly due to a strong defense mechanism against fish predation. To test this, we conducted field and aquarium experiments in which we assessed the antifeeding effect of secondary metabolites of 2 common xeniid species, Ovabunda crenata and Heteroxenia ghardaqensis. In the field experiment, the metabolites of both investigated species reduced feeding on experimental food pellets in the natural population of Red Sea reef fishes by 86 and 92% for O. crenata and H. ghardaqensis, respectively. In the aquarium experiment, natural concentration of crude extract reduced feeding on experimental food pellets in the common reef fish Thalassoma lunare (moon wrasse) by 83 and 85%, respectively. Moon wrasse feeding was even reduced at extract concentrations as low as 12.5% of the natural concentration in living soft coral tissues. To assess the potential of a structural anti-feeding defence, sclerites of O. crenata were extracted and mixed into food pellets at natural, doubled and reduced concentration without and in combination with crude extract at 25% of natural concentration, and tested in an aquarium experiment. The sclerites did not show any effect on the feeding behavior of the moon wrasse indicating that sclerites provide structural support rather than antifeeding defense. H. ghardaqensis lacks sclerites. We conclude that the conspicuous abundance of xeniid soft coral species in the Red Sea is likely a consequence of a strong chemical defence, rather than physical defences, against potential predators.
    Type: Dataset
    Format: application/zip, 3 datasets
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    DATA PANGAEA
  • 6
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    Heatwave experiment in Kiel Outdoor Benthocosms, 2015: dataset for Fucus vesiculosus and Zostera marina response variables (2019)
    PANGAEA
    In:  Supplement to: Saha, Mahasweta; Barboza, Francisco Rafael; Somerfield, Paul J; Al-Janabi, Balsam; Beck, Miriam; Brakel, Janina; Ito, Maysa; Pansch, Christian; Nascimento Schulze, Jennifer C; Jakobsson-Thor, Stina; Weinberger, Florian; Sawall, Yvonne (2020): Response of foundation macrophytes to near‐natural simulated marine heatwaves. Global Change Biology, 26(2), 417-430, https://doi.org/10.1111/gcb.14801
    Details
    Publication Date: 2024-03-06
    Description: 13 response variable have been measured for Fucus vesiculosus and Zostera marina. Year: 2015 Where: Kiel Outdoor Benthocosm Treatments: - Co (0HW) = ambient treatment with no heatwaves - 1HW = one summer heatwave - 3HWs = three heatwaves, 2 spring/early summer heatwaves After 3HW means end of the experiment.
    Keywords: Antibacterial defence; Antigrazing defence; Anti-Labyrinthula defence; Epibacteria; Fucus vesiculosus; Germlings; growth; Labyrinthula abundance; Leaf production; Lesions; Photosynthesis; Respiration; Survival; Zostera marina
    Type: Dataset
    Format: application/zip, 10 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Experiments on ocean acidification effects on mussel calcification (2020)
    PANGAEA
    In:  Supplement to: Wahl, Martin; Schneider Covachã, Sabrina; Saderne, Vincent; Hiebenthal, Claas; Müller, Jens Daniel; Pansch, Christian; Sawall, Yvonne (2018): Macroalgae may mitigate ocean acidification effects on mussel calcification by increasing pH and its fluctuations. Limnology and Oceanography, 63(1), 3-21, https://doi.org/10.1002/lno.10608
    Details
    Publication Date: 2024-03-06
    Description: Ocean acidification (OA) is generally assumed to negatively impact calcification rates of marine organisms. At a local scale however, biological activity of macrophytes may generate pH fluctuations with rates of change that are orders of magnitude larger than the long-term trend predicted for the open ocean. These fluctuations may in turn impact benthic calcifiers in the vicinity. Combining laboratory, mesocosm and field studies, such interactions between OA, the brown alga Fucus vesiculosus, the sea grass Zostera marina and the blue mussel Mytilus edulis were investigated at spatial scales from decimetres to 100s of meters in the western Baltic. Macrophytes increased the overall mean pH of the habitat by up to 0.3 units relative to macrophyte- free, but otherwise similar, habitats and imposed diurnal pH fluctuations with amplitudes ranging from 0.3 to more than 1 pH unit. These amplitudes and their impact on mussel calcification tended to increase with increasing macrophyte biomass to bulk water ratio. At the laboratory and mesocosm scales, biogenic pH fluc- tuations allowed mussels to maintain calcification even under acidified conditions by shifting most of their calcification activity into the daytime when biogenic fluctuations caused by macrophyte activity offered temporal refuge from OA stress. In natural habitats with a low biomass to water body ratio, the impact of biogenic pH fluctuations on mean calcification rates of M. edulis was less pronounced. Thus, in dense algae or seagrass habitats, macrophytes may mitigate OA impact on mussel calcification by raising mean pH and providing temporal refuge from acidification stress.
    Type: Dataset
    Format: application/zip, 7 datasets
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    DATA PANGAEA
  • 8
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    Temperature regimes and Coral response parameters of the artificial upwelling experiment (2020)
    PANGAEA
    Details
    Publication Date: 2024-03-06
    Description: In this study, we investigated the effect of simulated artificial upwelling with deep water off Bermuda collected at 50 m (24°C) and 100 m (20°C) on coral symbiont biology of 3 coral species (Montastraea cavernosa, Porites astreoides, and Pseudodiploria strigosa) in a temperature stress experiment. The following treatments were applied over a period of 3 weeks: (i) control at 28°C (ii) heat at 31°C, (iii) heat at 31°C deep water from 50 m depth, and (iv) heat at 31°C deep water from 100 m depth. Artificial upwelling was simulated over a period of 25 min on a daily basis resulting in a reduction of temperature for 2 h per day. A total of 4 data sets are available: 2 data sets comprise the coral response parameters (i) zooxanthellae densities, chlorophyll-a concentration and (ii) net photosynthetic rates of each replicate, and the other 2 data sets include the temperature data measured throughout the experiment (iii) in all treatments and (iv) in the artificial upwelling treatment only.
    Keywords: artificial upwelling; Bermuda; Coral Bleaching; thermal stress; zooxanthellae response
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Metabolism of P. verrucosa during field expeditions along the Saudi Arabian Red Sea coast 2011 and 2012: photosynthesis rate (2015)
    PANGAEA
    Details
    Publication Date: 2024-03-06
    Keywords: 1N_pristine; 2N_pristine; 3N_pristine; 5N_pristine; Al-Wajh; DOG; Doga-W; Event label; FAR; Farasan; Irradiance, downward PAR; Irradiance, standard error; Jeddah; Maqna; Photosynthesis rate of oxygen; Sample code/label; Season; Standard error; Yanbu
    Type: Dataset
    Format: text/tab-separated-values, 1089 data points
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    DATA PANGAEA
  • 10
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    Feeding experiment in two dominant soft coral species (Xeniidae) in the field in the Red Sea (2015)
    PANGAEA
    Details
    Publication Date: 2024-03-06
    Keywords: Date/time end; Date/time start; DEPTH, water; Duration; LATITUDE; LONGITUDE; Proportion; Replicate; Site; Species; Wet mass
    Type: Dataset
    Format: text/tab-separated-values, 420 data points
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    DATA PANGAEA
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