cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.860281
title: Reduced resilience of a globally distributed coccolithophore to ocean acidification: Confirmed up to 2000 generations

description: Ocean acidification (OA), induced by rapid anthropogenic CO2 rise and its dissolution in seawater, is known to have consequences for marine organisms. However, knowledge on the evolutionary responses of phytoplankton to OA has been poorly studied. Here we examined the coccolithophore Gephyrocapsa oceanica, while growing it for 2000 generations under ambient and elevated CO2 levels. While OA stimulated growth in the earlier selection period (from generations 700 to 1550), it reduced it in the later selection period up to 2000 generations. Similarly, stimulated production of particulate organic carbon and nitrogen reduced with increasing selection period and decreased under OA up to 2000 generations. The specific adaptation of growth to OA disappeared in generations 1700 to 2000 when compared with that at 1000 generations. Both phenotypic plasticity and fitness decreased within selection time, suggesting that the species' resilience to OA decreased after 2000 generations under high CO2 selection.
description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation is 2016-05-06.
description: Supplement to: Jin, Peng; Gao, Kunshan (2016): Reduced resilience of a globally distributed coccolithophore to ocean acidification: Confirmed up to 2000 generations. Marine Pollution Bulletin, 103(1-2), 101-108
DOI: 10.1594/pangaea.860217
title: Interactive effects of light, nitrogen source, and carbon dioxide on energy metabolism in the diatom Thalassiosira pseudonana

description: Due to the ongoing effects of climate change, phytoplankton are likely to experience enhanced irradiance, more reduced nitrogen, and increased water acidity in the future ocean. Here, we used Thalassiosira pseudonana as a model organism to examine how phytoplankton adjust energy production and expenditure to cope with these multiple, interrelated environmental factors. Following acclimation to a matrix of irradiance, nitrogen source, and CO2 levels, the diatom's energy production and expenditures were quantified and incorporated into an energetic budget to predict how photosynthesis was affected by growth conditions. Increased light intensity and a shift from inline image to inline image led to increased energy generation, through higher rates of light capture at high light and greater investment in photosynthetic proteins when grown on inline image. Secondary energetic expenditures were adjusted modestly at different culture conditions, except that inline image utilization was systematically reduced by increasing pCO2. The subsequent changes in element stoichiometry, biochemical composition, and release of dissolved organic compounds may have important implications for marine biogeochemical cycles. The predicted effects of changing environmental conditions on photosynthesis, made using an energetic budget, were in good agreement with observations at low light, when energy is clearly limiting, but the energetic budget over-predicts the response to inline image at high light, which might be due to relief of energetic limitations and/or increased percentage of inactive photosystem II at high light. Taken together, our study demonstrates that energetic budgets offered significant insight into the response of phytoplankton energy metabolism to the changing environment and did a reasonable job predicting them.
description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation is 2016-05-05.
description: Supplement to: Shi, Dalin; Li, Weiying; Hopkinson, Brian M; Hong, Haizheng; Li, Dongmei; Kao, Shuh-Ji; Lin, Wenfang (2015): Interactive effects of light, nitrogen source, and carbon dioxide on energy metabolism in the diatom Thalassiosira pseudonana. Limnology and Oceanography, 60(5), 1805-1822
DOI: 10.1594/pangaea.823110
title: Interactive effects of ocean acidification and nitrogen limitation on the diatom Phaeodactylum tricornutum

description: Climate change is expected to bring about alterations in the marine physical and chemical environment that will induce changes in the concentration of dissolved CO2 and in nutrient availability. These in turn are expected to affect the physiological performance of phytoplankton. In order to learn how phytoplankton respond to the predicted scenario of increased CO2 and decreased nitrogen in the surface mixed layer, we investigated the diatom Phaeodactylum tricornutum as a model organism. The cells were cultured in both low CO2 (390 µatm) and high CO2 (1000 µatm) conditions at limiting (10 µmol/L) or enriched (110 µmol/L) nitrate concentrations. Our study shows that nitrogen limitation resulted in significant decreases in cell size, pigmentation, growth rate and effective quantum yield of Phaeodactylum tricornutum, but these parameters were not affected by enhanced dissolved CO2 and lowered pH. However, increased CO2 concentration induced higher rETRmax and higher dark respiration rates and decreased the CO2 or dissolved inorganic carbon (DIC) affinity for electron transfer (shown by higher values for K1/2 DIC or K1/2 CO2). Furthermore, the elemental stoichiometry (carbon to nitrogen ratio) was raised under high CO2 conditions in both nitrogen limited and nitrogen replete conditions, with the ratio in the high CO2 and low nitrate grown cells being higher by 45% compared to that in the low CO2 and nitrate replete grown ones. Our results suggest that while nitrogen limitation had a greater effect than ocean acidification, the combined effects of both factors could act synergistically to affect marine diatoms and related biogeochemical cycles in future oceans.
description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2013-11-20.
description: Supplement to: Li, Wei; Gao, Kunshan; Beardall, John (2012): Interactive Effects of Ocean Acidification and Nitrogen-Limitation on the Diatom Phaeodactylum tricornutum. PLoS ONE, 7(12), e51590
DOI: 10.1594/pangaea.869415
title: Effects of elevated pCO2 and feeding on net calcification and energy budget of the Mediterranean cold-water coral Madrepora oculata

description: Ocean acidification is a major threat to calcifying marine organisms such as deep-sea cold-water corals (CWC), but related knowledge is scarce. The aragonite saturation threshold (Omega a) for calcification, respiration, and organic matter fluxes was investigated experimentally in the Mediterranean Madrepora oculata (Linnaeus 1758). Over 10 weeks, colonies were maintained under two feeding regimes (uptake of 36.75 and 7.46 µmol C/polyp/week) and exposed in 2 week intervals to a consecutively changing air-CO2 mix (pCO2) of 400, 1600, 800, 2000 and 400 ppm. There was a significant effect of feeding on calcification at initial ambient pCO2, while at consecutive pCO2 treatments feeding had no effect on calcification. Respiration was not significantly affected by feeding or pCO2 levels. Coral skeletons started to dissolve at an average Omega a threshold of 0.92, but recovered and started to calcify again at Omega a&gt; or =1. The surplus energy required to counteract dissolution at elevated pCO2 (&gt; or =1600µatm) was twice that at ambient pCO2. Yet, feeding had no mitigating effect at increasing pCO2 levels. This could be due to the fact that the energy required for calcification is a small fraction (1 to 3%) of the total metabolic energy demand and corals even under low food conditions might therefore still be able to allocate this small portion of energy to calcification. The response and resistance to ocean acidification is consequently not controlled by feeding in this species, but more likely by chemical reaction at the site of calcification and exchange processes between the calicoblastic layer and ambient seawater.
description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2016) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation is 2016-12-12.
description: Supplement to: Maier, Cornelia; Popp, Pauline; Sollfrank, Nicole; Weinbauer, Markus G; Wild, Christian; Gattuso, Jean-Pierre (2016): Effects of elevated pCO2 and feeding on net calcification and energy budget of the Mediterranean cold-water coral Madrepora oculata. Journal of Experimental Biology, 219(20), 3208-3217
DOI: 10.1594/pangaea.880576
title: Seawater carbonate chemistry and growth, nitrogen availability, photosynthesis of Thalassiosira pseudonana

description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2016) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2017-09-13.
DOI: 10.1594/pangaea.888813
title: Seawater carbonate chemistry and phytoplankton stoichiometry, production and community structure in eutrophic coastal waters

description: There is a growing consensus that the ongoing increase in atmospheric CO2 level will lead to a variety of effects on marine phytoplankton and ecosystems. However, the effects of CO2 enrichment on eutrophic coastal waters are still unclear, as are the complex mechanisms coupled to the development of eutrophication. Here, we report the first mesocosm CO2 perturbation study in a eutrophic subtropical bay during summer by investigating the effect of rising CO2 on a model artificial community consisting of well-characterized cultured diatoms (Phaeodactylum tricornutum and Thalassiosira weissflogii) and prymnesiophytes (Emiliania huxleyi and Gephyrocapsa oceanica). These species were inoculated into triplicate 4 m**3 enclosures with equivalent chlorophyll a (Chl-a) under present and higher partial pressures of atmospheric CO2 (pCO2 = 400 and 1000 ppmv). Diatom bloom events were observed in all enclosures, with enhanced organic carbon production and Chl-a concentrations under high CO2 treatments. Relative to the low CO2 treatments, the consumption of the dissolved inorganic nitrogen and uptake ratios of N/P and N/Si increased significantly during the bloom. These observed responses suggest more extensive and complex effects of higher CO2 concentrations on phytoplankton communities in coastal eutrophic environments.
description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2016) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2018-04-11.
description: Supplement to: Liu, Xin; Li, Yan; Wu, YaPing; Huang, Bangqin; Dai, Minhan; Fu, Feixue; Hutchins, David A; Gao, Kunshan (2017): Effects of elevated CO2 on phytoplankton during a mesocosm experiment in the southern eutrophicated coastal water of China. Scientific Reports, 7(1)
DOI: 10.1594/pangaea.885410
title: Seawater carbonate chemistry and elemental composition of a southern hemisphere strain of coccolithophore Emiliania huxleyi

description: A series of semi-continuous incubation experiments were conducted with the coccolithophore Emiliania huxleyi strain NIWA1108 (Southern Ocean isolate) to examine the effects of five environmental drivers (nitrate concentration, phosphate concentration, irradiance, temperature and pCO2) on both the physiological rates and elemental composition. Here, we report the alteration of the elemental composition of E. huxleyi in response to the changes in these environmental drivers. A series of dose response curves for the cellular elemental composition of E. huxleyi were fitted for each of the five drivers across an environmentally-representative gradient. The importance of each driver in regulating the elemental composition of E. huxleyi was ranked using a semi-quantitative approach. The percentage variation in elemental composition arising from the change in each driver between present day and model-projected conditions for the year 2100 were calculated. Temperature was the most important driver controlling both cellular particulate organic and inorganic carbon content, whereas nutrient concentrations were the most important regulator of cellular particulate nitrogen and phosphorus of E. huxleyi. In contrast, elevated pCO2 had the greatest influence on cellular particulate inorganic carbon to organic carbon ratio, resulting in a decrease in the ratio. Our results indicate that the different environmental drivers each play specific roles in regulating the cellular elemental composition of E. huxleyi with wide-reaching implications for coccolithophore biogeochemistry, as a consequence of the regulation of E. huxleyi physiological processes.
description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2016) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2018-01-23.
description: Supplement to: Feng, Yuanyuan; Roleda, Michael Y; Armstrong, Evelyn; Law, Cliff S; Boyd, Philip W; Hurd, Catriona L (2018): Environmental controls on the elemental composition of a Southern Hemisphere strain of the coccolithophore Emiliania huxleyi. Biogeosciences, 581-595
DOI: 10.1594/pangaea.892370
title: Interactive effects of warming and ocean acidification on the Arctic picoeukaryote Micromonas pusilla

description: In the Arctic Ocean, climate change effects such as warming and ocean acidification (OA) are manifesting faster than in other regions. Yet, we are lacking a mechanistic understanding of the interactive effects of these drivers on Arctic primary producers. In the current study, one of the most abundant species of the Arctic Ocean, the prasinophyte Micromonas pusilla, was exposed to a range of different pCO2levels at two temperatures representing realistic scenarios for current and future conditions. We observed that warming and OA synergistically increased growth rates at intermediate to high pCO2 levels. Furthermore, elevated temperatures shifted the pCO2-optimum of biomass production to higher levels. Based on changes in cellular composition and photophysiology, we hypothesise that the observed synergies can be explained by beneficial effects of warming on carbon fixation in combination with facilitated carbon acquisition under OA. Our findings help to understand the higher abundances of picoeukaryotes such as M. pusilla under OA, as has been observed in many mesocosm studies.
description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2016) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2018-07-12.
description: Supplement to: Hoppe, Clara Jule Marie; Flintrop, Clara; Rost, Björn (2018): The Arctic picoeukaryote Micromonas pusilla benefits synergistically from warming and ocean acidification. Biogeosciences, 15, 1-13
DOI: 10.1594/pangaea.840328
title: Comparative responses of two dominant Antarctic phytoplankton taxa to interactions between ocean acidification, warming, irradiance, and iron availability

description: We investigated the responses of the ecologically dominant Antarctic phytoplankton species Phaeocystis antarctica (a prymnesiophyte) and Fragilariopsis cylindrus (a diatom) to a clustered matrix of three global change variables (CO2, mixed-layer depth, and temperature) under both iron (Fe)-replete and Fe-limited conditions based roughly on the Intergovernmental Panel on Climate Change (IPCC) A2 scenario: (1) Current conditions, 39 Pa (380 ppmv) CO2, 50 µmol photons/m**2/s light, and 2°C; (2) Year 2060, 61 Pa (600 ppmv) CO2, 100 µmol photons/m**2/s light, and 4°C; (3) Year 2100, 81 Pa (800 ppmv) CO2, 150 µmol photons/m**2/s light, and 6°C. The combined interactive effects of these global change variables and changing Fe availability on growth, primary production, and cell morphology are species specific. A competition experiment suggested that future conditions could lead to a shift away from P. antarctica and toward diatoms such as F. cylindrus. Along with decreases in diatom cell size and shifts from prymnesiophyte colonies to single cells under the future scenario, this could potentially lead to decreased carbon export to the deep ocean. Fe : C uptake ratios of both species increased under future conditions, suggesting phytoplankton of the Southern Ocean will increase their Fe requirements relative to carbon fixation. The interactive effects of Fe, light, CO2, and temperature on Antarctic phytoplankton need to be considered when predicting the future responses of biology and biogeochemistry in this region.
description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne et al, 2014) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation is 2014-12-04.
description: Supplement to: Xu, Kai; Fu, Feixue; Hutchins, David A (2014): Comparative responses of two dominant Antarctic phytoplankton taxa to interactions between ocean acidification, warming, irradiance, and iron availability. Limnology and Oceanography, 59(6), 1919-1931
DOI: 10.1594/pangaea.984201
title: Physical oceanography from CTD stations conducted during RV ALKOR cruise AL575 in the North Sea

description: Physical oceanographic parameters were recorded during Alkor cruise AL575 in the North Sea. Two CTD stations were conducted at 30.06.2022 and 11.07.2022, respectively. Data was measured and recorded by using a Seabird SBE9plus CTD. Water column data and near-seafloor profiles shall provide oceanographic baseline data in areas of potential offshore carbon storage sites.
description: GPS data and date/time information were derived from shipboard WERUM-dship system (https://dship.geomar.de).
DOI: 10.15468/dl.m3guhx
title: Occurrence Download

description: A dataset containing 38643 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Lindera benzoin"
 ]
}

 The dataset includes 38643 records from 273 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0051773-250827131500795/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25345/c5mp4w154
title: MassIVE MSV000099130 - GNPS - Methanolic extracts containing Bile acids BAX 1889 - 2000
title: Untargeted LC-MS/MS acquisition was performed on a Vanquish Flex UHPLC system coupled to an Orbitrap Exploris 240 (Thermo Fisher Scientific, Bremen, Germany). Chromatographic separation was performed on a Kinetex 2.6 um 100 A pore size Polar C18 reversed phase UHPLC column 100 x 2.1 mm (Phenomenex, Torrance, CA)
DOI: 10.5281/zenodo.14728362
title: Replication package for: "A Tale of Two Networks: Common Ownership and Product Market Rivalry"

description: This package contains replication files for "A Tale of Two Networks: Common Ownership and Product Market Rivalry" by Florian Ederer and Bruno Pellegrino, to be published in the Review of Economic Studies.
DOI: 10.34928/0aeg-jj83
title: Données INNERMINE

description: Le projet « INNERMINE, démonstration des techniques d’INgéNierie Ecologique pour la Restauration MINièrE », avait  pour objectif de tester, démontrer, développer et promouvoir des techniques éprouvées et innovantes d’ingénierie écologique, en mettant l’accent sur leur application au contexte minier sous climat tropical. L’aspect innovant des techniques visées porte sur leur caractère multi-bénéfices, permettant à la fois un contrôle de l’érosion et de la sédimentation, et une restauration écologique des sites dégradés. Une attention particulière sera également portée à la durabilité des techniques retenues, à leur rapport coût avantage et à leur caractère reproductible dans d’autres pays d’outre-mer.Il s'agit ici d'un ensemble d'informations contextuelles à la situation de chaque ravine à retour d'expérience, et de photos décrivant les ouvrages réalisés et leur évolution en format Word.
DOI: 10.34928/7n91-5r19
title: Données QUAVAR

description: Le projet « QUAVAR, Qualité des eaux douces et valeurs de rejet pour les cours d’eau des milieux ultramafiques » – La qualité de l’eau est très variable selon les régions et est liée, entre autres, aux paramètres physico-chimiques (Eh, pH, T, turbidité, matière organiques, …) et à sa composition chimique. À ce jour, la ligne de base pour les substrats ultrabasiques riches en métaux n’a pas été définie. Pour la mise en place d’une politique de l’eau et d’une réglementation pour la protection des milieux dulçaquicoles, il était impératif de définir cette ligne de base qui peut être spécifique des hydro-écorégions de Nouvelle-Calédonie. La définition de cette ligne de base permettrait (i) de définir des seuils de qualité  environnementale adaptés à la spécificité de ces milieux calédoniens contenant naturellement d’importantes teneurs en éléments métalliques et (ii) à terme, de distinguer un état écologique “naturel” d’un état écologique impacté par les activités minières.
DOI: 10.15468/dl.47gz6a
title: Occurrence Download

description: A dataset containing 281492 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Rubus fruticosus"
 ]
}

 The dataset includes 281492 records from 1451 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0051716-250827131500795/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ebevu7
title: Occurrence Download

description: A dataset containing 44 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "TaxonKey is Chuquiraga straminea Sandwith",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 44 records from 4 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0004881-190813142620410/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.