cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.885923
title: Western-Mediterranean Pinus pinaster tree ring width for the period 1950-2006
DOI: 10.1594/pangaea.888468
title: Water temperature in Kiel Outdoor Benthocosms from May 2015 to August 2015

description: Presented are hourly logged data retrieved from the GHL sensors system (means over 4 benthocosm units with respective 95% confidence intervals).The experiment consisted of three treatments: 0HW = no heat wave; 1HW = one single summer heat wave; and 3HW = three subsequent heat waves. In all three treatments, working with continuous flow-through of fjord water maintained the natural small-scale variability of most environmental parameters except temperature, which was adjusted to the logged thermal regime of the year 2009.
DOI: 10.1594/pangaea.888498
title: Implemented water temperatures in Kiel Outdoor Benthocosms during heat wave experiment from May 2015 to August 2015.

description: The experiment consisted of three treatments: 0HW = no heat wave; 1HW = one single summer heat wave; and 3HW = three subsequent heat waves. In all three treatments, working with continuous flow-through of fjord water maintained the natural small-scale variability of most environmental parameters except temperature, which was adjusted to the logged thermal regime of the year 2009.
DOI: 10.1594/pangaea.887133
title: KOSMOS 2014 mesocosm study: mesozooplankton abundances

description: Using a mesocosm approach, we investigated ocean acidification effects on a subtropical zooplankton community during oligotrophic, bloom, and post-bloom phases under a range of different pCO2 levels (from ~400 to ~1480 µatm). To do that, we simulated an upwelling event by adding 650 m-depth nutrient-rich water to the mesocosms, which initiated a phytoplankton bloom. The most abundant mesozooplankters were calanoid copepods, which did not respond to CO2 treatments during the oligotrophic phase of the experiment but were found in higher abundance under medium- and high-pCO2 conditions towards the end of the experiment, most likely as a response to increased phyto- and microzooplankton standing stocks. The second most abundant mesozooplankton taxon were appendicularians, which did not show a response to the different pCO2 treatments. Overall, CO2 effects on zooplankton seem to be primarily transmitted through significant CO2 effects on phytoplankton and therefore indirect pathways.
DOI: 10.1594/pangaea.888589
title: Abundance and biomass in Kiel Outdoor Benthocosms at the end of the heat wave experiment from May 2015 to August 2015

description: The experiment consisted of three treatments: 0HW = no heat wave; 1HW = one single summer heat wave; and 3HW = three subsequent heat waves. In all three treatments, working with continuous flow-through of fjord water maintained the natural small-scale variability of most environmental parameters except temperature, which was adjusted to the logged thermal regime of the year 2009.
DOI: 10.1594/pangaea.887183
title: KOSMOS 2014 mesocosm study: microzooplankton abundances
DOI: 10.1594/pangaea.889312
title: KOSMOS Finland 2012 mesocosm study: Phytoplankton biomass and pigment concentration, Nitrogen cycle parameters

description: Nitrogen fixation by filamentous cyanobacteria supplies significant amounts of new nitrogen (N) to the Baltic Sea. This balances N loss processes such as denitrification and anammox, and forms an important N source supporting primary and secondary production in N-limited post-spring bloom plankton communities. Laboratory studies suggest that filamentous diazotrophic cyanobacteria growth and N2-fixation rates are sensitive to ocean acidification, with potential implications for new N supply to the Baltic Sea. In this study, our aim was to assess the effect of ocean acidification on diazotroph growth and activity as well as the contribution of diazotrophically fixed N to N supply in a natural plankton assemblage. We enclosed a natural plankton community in a summer season in the Baltic Sea near the entrance to the Gulf of Finland in six large-scale mesocosms (volume ∼ 55m3) and manipulated fCO2 over a range relevant for projected ocean acidification by the end of this century (average treatment fCO2: 365–1231µatm).
description: Supplement to: Paul, Allanah Joy; Achterberg, Eric Pieter; Bach, Lennart Thomas; Boxhammer, Tim; Czerny, Jan; Haunost, Mathias; Schulz, Kai Georg; Stuhr, Annegret; Riebesell, Ulf (2016): No observed effect of ocean acidification on nitrogen biogeochemistry in a summer Baltic Sea plankton community. Biogeosciences, 13(13), 3901-3913
DOI: 10.1594/pangaea.889701
title: Pollen counts of sediment core GeoB16205-4 from Parnaiba, NE Brazil

description: The semi-arid northeastern (NE) Brazil vegetation is largely dominated by Caatinga, one of the largest and richest dry forests in the world. Caatinga is a strategic biome, since it has borders with Cerrado, Atlantic forests and the Amazon, acting as a potential corridor (or barrier) for biotic interchange between these regions during evolutionary times. Therefore, accurate reconstructions of past vegetation, ecological and hydrological changes in this area are critical to understanding the dynamics of biome boundaries that may play an important role in dispersal and diversi!cation mechanisms and, more specifically, the link between the long-term climate variability and tropical biodiversity. Here, we present high-resolution palynological and elemental data from marine core GeoB16205-4 retrieved off the Parnaíba River mouth (NE Brazil) mainly covering the Younger Dryas (YD). We show that the YD interval was predominantly wet in NE Brazil, yet it was not homogenous and two distinct phases could be distinguished. A marked intensi!cation of wet conditions between ~12.3 and 11.6 cal kyr BP was recorded by the expansion of tropical rainforest and tree ferns. These results are in agreement with the transient TraCE-21k coupled climate model simulation. We infer that the second pluvial phase of the YD is related to a weak AMOC due to meltwater pulses in the North Atlantic, which forces a southward shift of the Intertropical Convergence Zone and its associated rainfall. Our records provide new evidence on the establishment of an “eastern forest corridor” in the nowadays semi-arid Caatinga allowing for past biotic interchanges of plant species.
description: Supplement to: Bouimetarhan, Ilham; Chiessi, Cristiano Mazur; González-Arango, Catalina; Dupont, Lydie M; Voigt, Ines; Prange, Matthias; Zonneveld, Karin A F (2018): Intermittent development of forest corridors in northeastern Brazil during the last deglaciation: Climatic and ecologic evidence. Quaternary Science Reviews, 192, 86-96
DOI: 10.1594/pangaea.889719
title: Statistics and a generalized additive mixed model (GAMM) for seawater temperatures in the Kiel Fjord at 1.5 m depth for the period 2000-2014

description: Seawater temperatures in the Kiel Fjord at 1.5 m depth. Daily means , daily min and daily max values for the period 2000-2014 are represented. A generalized additive mixed model (GAMM) was fitted to the time series, including its 95 % confidence interval. The 2009 temperature curve is presented as this was used as the reference temperature treatment in the presented experiment. Data source: GEOMAR, Ocean Circulation and Climate Dynamics - Marine Meteorology (www.geomar.de/en/service/weather).
DOI: 10.1594/pangaea.895828
title: Abundance of mesozooplankton during POLARSTERN cruise ANT-XXII/2 (PS67)
DOI: 10.1594/pangaea.893153
title: Pollen profile of sediment core FR1/94-GC3 from the East Tasman Plateau, Australia

description: Long, well-dated records of climate change in Australia are rare because most of the continent is prone to deflation and sediments are difficult to date beyond 40,000 years. Deep-sea cores containing terrigenous material provide an ideal alternative to terrestrial records, because of continuous sedimentation and a robust chronology derived from oxygen isotopes. In this paper, the second of a series of two, we present pollen and spores data from core Fr1/94-GC3 from the East Tasman Plateau. This core is positioned at the southern extreme of the East Australia Current and simultaneously records changes in both oceanography and environments both offshore and in southeastern Australia. In an area of slow sedimentation, this core provides a continuous record of vegetation change in southeastern Australia and the southern Tasman Sea over approximately the last half a million years. Through time, glacial periods have progressively become warmer and shorter. Alpine plant taxa become more restricted with time and rainforest taxa expand to a far more restricted degree during the present interglacial period than the previous one, representing a fundamental shift in the vegetation of Tasmania. We apply transfer functions to reconstruct past rainfall and land temperatures based on the palynoflora which are then compared against the marine proxy record.
description: Pollen counts were performed by Sander van der Kaars and Michael McPhail.
description: Supplement to: De Deckker, Patrick; van der Kaars, Sander; Macphail, Michael K; Hope, Geoffrey S (2019): Land-sea correlations in the Australian region: 460 ka of changes recorded in a deep-sea core offshore Tasmania. Part 1: the pollen record. Australian Journal of Earth Sciences, 66(1), 1-15
DOI: 10.1594/pangaea.891245
title: Growth, POC and PIC production rates of individual E. huxleyi strains in the Azores, Bergen and Canary Islands populations to CO2 ranges from 115 μatm to 3070 μatm (Figure 3, Figure S4, Figure S7)
DOI: 10.1594/pangaea.891427
title: KOSMOS 2014 mesocosm study: phytoplankton abundance
DOI: 10.1594/pangaea.892889
title: Growth, POC and PIC production rates of individual E. huxleyi strains in the Azores, Bergen and Canary Islands populations to CO2 ranges from 115 μatm to 3070 μatm (Figure 1, Figure S2, Figure S6)
DOI: 10.1594/pangaea.895894
title: (Table S7) Percentage mean for selected pollen taxa and groups of sediment core KZR-23
DOI: 10.1594/pangaea.895916
title: Photographs of copepod species from net samples taken during the POLARSTERN cruise ANT-XXII/2 (PS67)

description: During the POLARSTERN cruise ANT-XXII/2 (ISPOL) to the Southern Ocean sea-ice associated copepods were sampled from ice cores and preserved in formalin. Photographs of the copepod species were taken through the ocular of the stereo microscope. No scale is provided, but a link to the respective WoRMS species page where sizes for adults can be found. If available a link to a corresponding dataset on species abundances during the cruises is provided.
DOI: 10.1594/pangaea.897922
title: Pollen and Spores of sediment core MD96-2048 Pleistocene

description: To study the influence of pCO2 on the Pleistocene development of the SE African vegetation, we used the pollen record of a marine core (MD96-2048) retrieved from Delago Bay south of the Limpopo River mouth in combination with stable isotope and geochemical proxies. Applying endmember analysis four pollen assemblages could be distinguished representing different biomes: heathland, mountain forest, shrubland and woodland. It turned out that the vegetation of the Limpopo River catchment and the coastal region of southern Mozambique is not only influenced by hydroclimate but by temperatures and atmospheric pCO2, as well. Our results suggest that the extension of either open ericaceous vegetation including C4 sedges or mountain forest depended on glacial pCO2 levels and that the main development of woodlands in the area took place after the Mid-Brunhes Event when interglacial pCO2 levels rose over 270 ppmv.
description: Supplement to: Dupont, Lydie M; Caley, Thibaut; Castañeda, Isla S (2019): Effects of atmospheric CO2 variability of the past 800 kyr on the biomes of southeast Africa. Climate of the Past, 15(3), 1083-1097
DOI: 10.1594/pangaea.896211
title: Marine surface pollen data off southwestern Morocco
DOI: 10.1594/pangaea.896249
title: Pollen analysis of marine sediment core GeoB8601-3
DOI: 10.1594/pangaea.896252
title: River surface pollen data in southwestern Morocco
DOI: 10.1594/pangaea.895780
title: Pollen data from surface-sediment samples from 92 lakes in Italy

description: Aim and Location: Our aim is to develop pollen-climate inference models for southern Europe and to test their performance and inference power by cross-validation with modern climate data. Surface sediments collected from lakes along a climate gradient from the winter-cold/summer-wet Alps to winter-wet/summer-dry Sicily were analysed for modern pollen assemblages.Methods: For each lake, mean monthly temperatures, seasonal precipitation and site-specific climate uncertainties have been estimated. Pollen-climate relationships were studied using numerical analyses, and inference models were derived by partial least squares (PLS) and weighted-averaging PLS (WA-PLS) regressions for January and July temperatures (T ), and for winter, spring and summer precipitation (P). In order to assess whether these variables are also of ecological importance for vegetation in the subregions, we split the data set into an Alpine and a Mediterranean subset.Results: Low bootstrap cross-validated root mean square errors of prediction (RMSEP) for January T (1.7 °C), July T (2.1 °C) and summer P (38 mm), as well as low RMSEPs expressed as a percentage of the gradient length (8 -9%), indicate a good inference power. Models revealed excellent to good performance statistics for January T, July T and summer P (r2 = 0.8), and for winter and spring P (r 2 = c. 0.5). We show that the variables with the highest explanatory power differ between the two subregions. These are summer T and P for the Alpine set, and January T, winter P and July T for the Mediterranean set.Main conclusions: The study reveals the influence of climatic conditions during the growing season on modern pollen assemblages and indicates the potential of pollen data for long-term climate reconstructions of parameters such as winter precipitation and temperature, which seem to be the main factors having an influence on the variability of Mediterranean climate. These models may therefore provide important information on past regional climate variability in southern Europe.
description: Supplement to: Finsinger, Walter; Heiri, Oliver; Valsecchi, Verushka; Tinner, Willy; Lotter, André F (2007): Modern pollen assemblages as climate indicators in southern Europe. Global Ecology and Biogeography, 16(5), 567-582
DOI: 10.1594/pangaea.897546
title: Pollen and spores of composite sediment core GeoB16602
DOI: 10.3886/e117982v1-146812
title: The Effects of No Child Left Behind on Children’s Socioemotional Outcomes

description: Many people have worried about possible adverse effects of high-stakes testing on socioemotional outcomes. This article uses
a difference-in-differences approach to investigate the effects of the introduction of high-stakes testing via the No Child Left
Behind Act on socioemotional outcomes. Data are from the Early Childhood Longitudinal Survey–Kindergarten Cohort of
1998–1999, a nationally representative longitudinal survey. The 10 outcomes that we examine are from the children’s SelfDescriptive Questionnaire, including externalizing problems related to paying attention and behavior in school, internalizing
problems related to feeling sad and lonely and academic anxiety, as well as interest and competence in math, reading, and
school in general. We find that the introduction of high-stakes test accountability did not have consistent significant effects
on these socioemotional outcomes. These findings can help states address concerns and motivate further research on potential
unintended consequences of revised accountability systems under the Every Student Succeeds Act.
DOI: 10.1594/pangaea.900467
title: Downcore data for sediment core M77/2_52-2

description: Downcore data for core M77/2 52-2. PD is the mean pore density of Bolivina spissa for this depth. N is the number of specimens used for the pore density analysis in this sample. [NO3-]BW was calculated from the pore density of Bolivina spissa using eq. 3. δ18O and δ13C were measured on Uvigerina peregrina. δ15N was measured on bulk sediment.
description: Supplement to: Glock, Nicolaas; Erdem, Zeynep; Wallmann, Klaus; Somes, Christopher J; Liebetrau, Volker; Schönfeld, Joachim; Gorb, Stanislav N; Eisenhauer, Anton (2018): Coupling of oceanic carbon and nitrogen facilitates spatially resolved quantitative reconstruction of nitrate inventories. Nature Communications, 9(1)
DOI: 10.1594/pangaea.902899
title: KOSMOS 2014 mesocosm study: zooplankton (Fig. 4)
DOI: 10.1594/pangaea.901314
title: Experiment 2: blue mussel larval shell cultures for shell proteomic analysis: shell length

description: Culture bottles for larval shell proteomic analysis were pooled by family and larval shell length measured in 30 individuals (F1= family 1, F2= family 2, F3= family 3)
DOI: 10.1594/pangaea.901792
title: Experiment 1: prestudy on blue mussel larval shell cleaning optimization for proteomic analysis

description: Mussel larval valve area after cleaning with dH2O (0% NaOCl) or 0.5% 1%, 2.5 NaOCl for 7 minutes or 2.5% NaOCl for 5 minutes. These results are part of the larval shell cleaning method optimization prior to shell proteomic analysis.
DOI: 10.1594/pangaea.901793
title: Experiment 2: blue mussel larval shell cultures for shell proteomic analysis

description: Details on the mussel larval cultures for larval shell proteomic analysis (F1= family 1, F2= family 2, F3= family 3).
DOI: 10.1594/pangaea.901794
title: Experiment 2: blue mussel larval shell cultures for shell proteomic analysis: Bicinchoninic acid (BCA) assay

description: Output of the bicinchoninic acid assay (BCA) measuring the total protein content in the pooled larval shell samples (F1= family 1, F2= family 2, F3= family 3).
DOI: 10.1594/pangaea.902900
title: KOSMOS 2014 mesocosm study: PIC, POC and BSi (Fig. 5)

description: Mesocosm length : 15 m, max sampling depth: 13 m.
DOI: 10.1594/pangaea.902921
title: KOSMOS 2014 mesocosm study: particle sinking velocity (Fig. 6)
DOI: 10.1594/pangaea.905613
title: Mesocosm Experiment in the Raunefjord, Norway KOSMOS 2011: particles and fluxes in water column and sediment traps

description: Mass flux normalized for individual mesocosm volume (massflux [µmol] / mesocosm volume [L])
DOI: 10.1594/pangaea.903711
title: Pollen record of ODP Hole 122-763A
DOI: 10.1594/pangaea.903734
title: KOSMOS 2014 mesocosm study: RLS and C_remin (Fig. 7)
DOI: 10.1594/pangaea.903735
title: KOSMOS 2014 mesocosm study: particle size (Fig. 7)
DOI: 10.1594/pangaea.904292
title: KOSMOS 2014 mesocosm study: Respiratory metabolism of microplankton

description: Potential respiration and proteinaceous biomass in the microplankton community (0.7-50um)
DOI: 10.1594/pangaea.904293
title: KOSMOS 2014 mesocosm study: Respiratory metabolism sediment traps

description: Potential respiration and proteinaceous biomass in sediment traps
DOI: 10.1594/pangaea.904294
title: Palynological data from cores SG-1 and SG-1b from the Qaidam Basin (Tibetan Plateau) spanning the past ~7 Ma

description: To reconstruct the timing and underlying forcing of major shifts in the composition of terrestrial ecosystems in arid Central Asia during the late Cenozoic (past ~7 Ma), we carry out palynological analysis of lake sediments from the Qaidam Basin (NE Tibetan Plateau, China). Our results show that the steppe/semi-desert biomes dominating the Qaidam Basin experienced marked turnovers at ~3.6 and 3.3 Ma. Most notably, the younger of these turnover events is characterized by a two- to three-fold expansion of Artemisia at the expense of other steppe/semi-desert taxa. This turnover event led to the replacement of the Ephedraceae/Chenopodiaceae dominated and Nitraria-rich steppe/semi-deserts that were dominant in the Qaidam Basin during the Paleogene and abundant during the Miocene by Artemisia/Chenopodiaceae-dominated steppe/semi-deserts as they exist until today. The vegetation turnover events are synchronous with shifts towards drier conditions in Central Asia as documented in climate records from the Chinese Loess Plateau and the Central North Pacific Ocean. On a global scale, they can be correlated to early glaciation events in the Northern Hemisphere during the Pliocene. Integration of our palynological data from the Qaidam Basin with Northern Hemisphere climate-proxy and regional-scale tectonic information suggests that the uplift of the Tibetan Plateau posed ecological pressure on Central Asian plant communities, which made them susceptible to the effects of early Northern Hemisphere glaciations during the late Pliocene. Although these glaciations were relatively small in comparison to their Pleistocene counterparts, the transition towards drier/colder conditions pushed previously existing plant communities beyond their tolerance limits, thereby causing a fundamental reorganization of arid ecosystems. The Artemisia dominance since ~3.3 Ma resulting from this reorganization marks a point in time after which the Artemisia/Chenopodiaceae pollen ratio can serve as a reliable indicator for moisture availability in Central Asia.
description: Supplement to: Koutsodendris, Andreas; Allstädt, Frederik J; Kern, Oliver A; Kousis, Ilias; Schwarz, Florian; Vannacci, Martina; Woutersen, Amber; Appel, Erwin; Berke, Melissa A; Fang, Xiaomin; Friedrich, Oliver; Hoorn, Carina; Salzmann, Ulrich; Pross, Jörg (2019): Late Pliocene vegetation turnover on the NE Tibetan Plateau (Central Asia) triggered by early Northern Hemisphere glaciation. Global and Planetary Change, 180, 117-125
DOI: 10.1594/pangaea.904623
title: Heatwave experiment in Kiel Outdoor Benthocosms, 2015: growth and leaf production of Zostera marina

description: Method: mark leaves and measure initial lengths of seagrass blades and final lengths after 2 weeks (before HW) and 4 weeks (after HW)
DOI: 10.1594/pangaea.911120
title: In situ and laboratory measurements of calcification and different pH

description: Calcification rate of mussels in water from different distances from the rim into natural (in situ) and simulated (aquarium series) Fucus stands was assessed under daytime and nighttime conditions.
DOI: 10.1594/pangaea.907832
title: Pollen and spore counts for the upper 10 meter of ODP Site 108-658, Brunhes Chron
DOI: 10.1594/pangaea.910349
title: Benthocosm experiment on calcification of mussels (Mytilus edulis) from Kiel Fjord

description: Calcification rates and growth rates of mussels reared under acidified and non-acidified conditions were exposed to acidified and non-acidified conditions in the mesocosm facility KOB of GEOMAR.
DOI: 10.1594/pangaea.910350
title: Mussel (Mytilus edulis) growth in small macrophyte habitats, Kiel Fjord

description: Shell length increase of mussels exposed in natural micrahabitats (Fucus, Zostera, sand) was monitored by SCUBA over 30 days.
DOI: 10.1594/pangaea.906142
title: Coastal ice-rafted detritus of Black Sea sediment cores covering MIS 6 (184-130 ka BP)

description: The amount of coastal ice-rafted detritus (IRDC) was determined by counting the detrital grains from 8.8 cm3 subsamples of the dried and wet-sieved sediment fraction &gt;150 mm under a binocular microscope.
DOI: 10.1594/pangaea.908773
title: Pollen and spore data of sediment core SA-2-102, Segara Anakan lagoon, Central Java, Indonesia
DOI: 10.1594/pangaea.907725
title: Pollen counts of sediment core Colonia_CO3
DOI: 10.1594/pangaea.907726
title: Pollen counts of sediment core Colonia_CO14
DOI: 10.1594/pangaea.910770
title: Response of the microbial food web to gradients of organic matter and grazing pressure in incubation experiments in Patagonia: Mesocosm

description: Zooplankton treatment: HZ: zooplankton added, LZ: Zooplankton removedCarbon treatment: 0C: No glucose addition, 0.5: 0.5 x Redfield. 1: 1xRedfield, 2: 2xRedfield, 3: 3XRedfield
DOI: 10.1594/pangaea.911127
title: Abiotic conditions in the in situ patches

description: Salinity, oxygen and pH conditions in the microhabitat patches of Fucus, Zostera and sand at daytime and nighttime in the months august and september 2013 as sampled by regular SCUBA dives.