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  • 1
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Panieri, Giuliana; Aharon, Paul; Gupta, Barun K Sen; Camerlenghi, Angelo; Ferrer, Francesc Palmer; Cacho, Isabel (2014): Late Holocene foraminifera of Blake Ridge diapir: Assemblage variation and stable-isotope record in gas-hydrate bearing sediments. Marine Geology, 353, 99-107, https://doi.org/10.1016/j.margeo.2014.03.020
    Publication Date: 2023-01-13
    Description: The presence of gas hydrates on the Blake Ridge diapir, northeastern Atlantic Ocean, offers an opportunity to study the impact of methane seepage on the ecology and geochemistry of benthic foraminifera in the late Holocene. Three push cores, covering a time span of ~ 1000 yrs, were retrieved from three distinct microhabitats at the top of the diapir at a water depth of ~ 2150 m: (i) sediments away from seepage (control core), (ii) sediments overlain by clusters of methanotrophic and thiotrophic bivalves, and (iii) chemoautotrophic microbial mats. The foraminiferal assemblages at the two seep sites are marked by a reduction in benthic foraminiferal species diversity, coupled with a near-absence of agglutinated species. However, an opportunistic population rise in CH4- or H2S-tolerant calcareous species (e.g., Globocassidulina subglobosa and Cassidulina laevigata) that utilize the abundant trophic resources at the seeps has led to an increase in the overall assemblage density there. The delta18O and delta13C values of three species of benthic foraminifera - Gyroidinoides laevigatus, Globocassidulina subglobosa, and Uvigerina peregrina - and the planktonic species Globorotalia menardii were acquired from all three cores. The benthic species from methane seeps yield delta13C values of 0.1 to - 4.2 (per mil VPDB), that are distinctly more 13C-depleted relative to the delta13C of 0.4 to - 1.0 (per mil VPDB) at the control (off seep) site. The species from a mussel-bed site exhibit more negative delta13C values than those from microbial mats, possibly reflecting different food sources and higher rate of anaerobic oxidation of methane. The positive delta13C values in the paired planktonic species suggest that authigenic carbonate precipitation did not overprint the observed 13C depletions. Hence the probable cause of negative delta13C of benthic foraminifera is primary calcification from Dissolved Inorganic Carbon (DIC) containing mixed carbon fractions from (a) highly 13C-depleted, microbially-oxidized methane and (b) a seawater source.
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 2
    Publication Date: 2023-02-12
    Keywords: ALV_3709-3712_18; ALV_3709-3712_22; ALV_3709-3712_32; Bermuda, Atlantic Ocean; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Event label; Foraminifera; Latitude of event; Longitude of event; PUC; Push corer; Shannon Diversity Index; Species richness; Substrate type
    Type: Dataset
    Format: text/tab-separated-values, 350 data points
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  • 3
    Publication Date: 2023-02-12
    Keywords: Aharon1986; DATE/TIME; DEPTH, water; LATITUDE; LONGITUDE; OCE; Oceanography; Salinity; Temperature, water, potential; δ18O, water; δ Deuterium
    Type: Dataset
    Format: text/tab-separated-values, 42 data points
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  • 4
    Publication Date: 2023-02-12
    Keywords: ALV_3709-3712_18; ALV_3709-3712_22; ALV_3709-3712_32; Bermuda, Atlantic Ocean; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Event label; Globocassidulina subglobosa, δ13C; Globocassidulina subglobosa, δ18O; Globorotalia menardii, δ13C; Globorotalia menardii, δ18O; Gyroidinoides laevigatus, δ13C; Gyroidinoides laevigatus, δ18O; Latitude of event; Longitude of event; PUC; Push corer; Uvigerina peregrina, δ13C; Uvigerina peregrina, δ18O
    Type: Dataset
    Format: text/tab-separated-values, 400 data points
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  • 5
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Aharon, Paul (2003): Meltwater flooding events in the Gulf of Mexico revisited: Implications for rapid climate changes during the last deglaciation. Paleoceanography, 18(4), 1079, https://doi.org/10.1029/2002PA000840
    Publication Date: 2023-06-27
    Description: North American freshwater runoff records have been used to support the case that climate flickers were caused by shutdowns of the ocean thermohaline circulation (THC) resulting from reversals of meltwater discharges. Inconsistencies in the documentation of these meltwater switches, however, continue to fuel the debate on the cause/s of the oscillatory nature of the deglacial climate. New oxygen and carbon isotope records from the northern Gulf of Mexico depict in exceptional detail the succession of meltwater floods and pauses through the southern routing during the interval 16 to 8.9 ka (14C years BP; ka, kiloannum). The records underscore the bimodal role played by the Gulf of Mexico as a destination of meltwater discharges from the receding Laurentide Ice Sheet. The evidence indicates that the Gulf of Mexico acted as the principal source of superfloods at 13.4, 12.6, and 11.9 ka that reached the North Atlantic and contributed significantly to density stratification, disruption of ocean ventilation, and cold reversals. Gulf of Mexico lapsed into a “relief valve” position in post-Younger Dryas time, when meltwater discharges were rerouted south at 9.9, 9.7, 9.4, and 9.1 ka, thus temporarily interrupting North Atlantic-bound freshwater discharges from Lake Agassiz. The history of meltwater events in the Gulf of Mexico contradicts the model that meltwater flow via the eastern outlets into the North Atlantic disrupted the ocean THC, causing cooling, while diversions to the Gulf of Mexico via the Mississippi River enhanced THC and warming.
    Keywords: Age, 14C milieu/reservoir corrected (-400 yr); Age, dated; Age, dated standard deviation; DEPTH, sediment/rock; Event label; Globigerinoides ruber, δ13C; Gulf of Mexico; Louis_1900; Louis_2023; PC; Piston corer; Species; Δ14C; Δ14C, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 72 data points
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  • 6
    Publication Date: 2023-07-09
    Keywords: ALV_3709-3712_32; Angulogerina angulosa; Anomalina cf. colligera; Asterigerinata mamilla; Asterigerinata planorbis; Astrononion stelligerum; Bermuda, Atlantic Ocean; Bifarina decorata; Bolivina albatrossi; Bolivina lowmani; Bolivina pseudoplicata; Bolivina pulchella; Bolivina sp.; Bolivina spinescens; Bolivina subaenariensis; Bolivina translucens; Brizalina dilatata; Brizalina spathulata; Buccella frigida forma granulosa; Bulimina aculeata; Bulimina elegans subsp. marginata; Bulimina exilis; Bulimina inflata; Bulimina marginata; Bulimina rostrata; Bulimina striata; Buliminella elegantissima; Cancris oblongus; Cassidulina crassa; Cassidulina laevigata; Cassidulina sp.; Cassidulinoides bradyi; Chilostomella oolina; Cibicides mollis; Cibicides refulgens; Cibicides sp.; Cibicides wuellerstorfi; Cibicidoides kullenbergi; Cibicidoides pachyderma; Cibicidoides robertsonianus; Counting; Cycloforina sp.; Dentalina communis; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Deuterammina rotaliformis; Discopulvinulina sp.; Discorbis floridana; Discorbis floridensis; Discorbis sp.; Eggerella bradyi; Elphidium advenum; Elphidium incertum; Elphidium sp.; Eponides bradyi; Eponides polius; Eponides sp.; Eponides tumidulus; Eponides turgidus; Eponides umbonatus; Fissurina auricolata costata; Fissurina kerguelensis; Fissurina marginata; Fissurina orbignyana; Fissurina pseudorbignyana; Fissurina quadrata; Fissurina semimarginata; Fissurina sp.; Fissurina trigonomarginata; Fursenkoina schreibersiana; Gaudryinella sp.; Gavelinopsis lobatulus; Globocassidulina subglobosa; Globulina sp.; Gyroidina orbicularis; Gyroidina soldanii; Gyroidina sp.; Gyroidinoides laevigatus; Gyroidinoides umbonatus; Hoeglundina elegans; Lagena apiopleura; Lagena gracilis; Lagena gracillima; Lagena hispida; Lagena laevis; Lagena marginatoperforata; Lagena nebulosa; Lagena sp.; Lagena spumosa; Lagena striata; Laterostomella globulosa; Lenticulina peregrina; Lenticulina rotulata; Lenticulina stellata; Lobatula lobatula; Loxostomum sp.; Loxostomum truncatum; Marginulina obesa; Melonis barleeanus; Melonis pompilioides; Neoconorbina opercularis; Nonion depressulum; Nonionella atlantica; Nonionella turgida; Nonion granosum; Nonion grateloupi; Nonion pauciloculum; Nonion sp.; Oolina botelliformis; Oolina felsinea; Oolina hexagona; Oolina ovum; Oridorsalis umbonatus; Orthomorphina sp.; Osangularia sp.; Parafissurina lateralis; Patellina corrugata; Planulina ariminensis; Planulina sp.; Pleurostomella alternans; Polymorphina sp.; Praeglobobulimina affinis; Praeglobobulimina ovata; Praeglobobulimina pupoides; Pseudoparrella exigua; PUC; Pullenia bulloides; Pullenia compressiuscula quadriloba; Pullenia quinqueloba; Pullenia salisburyi; Push corer; Pyrgo bulloides; Pyrgo murrhina; Quadrimorphina sp.; Quinqueloculina agglutinans; Quinqueloculina compta; Quinqueloculina oblonga; Remaneica sp.; Reophax sp.; Reussella spinulosa; Robertina cf. arctica; Robertinoides bradyi; Rosalina globularis; Sagrina sp.; Seabrookia earlandi; Sigmoilinita tenuis; Sigmoilopsis schlumbergeri; Sphaeroidina bulloides; Stainforthia complanata; Stainforthia compressa; Stainforthia mexicana; Textularia wiesneri; Trifarina bradyi; Triloculina tricarinata; Trochammina sp.; Uvigerina auberiana; Uvigerina bradyana; Uvigerina cf. porrecta; Uvigerina peregrina; Uvigerina peregrina dirupta; Valvulineria complanata; Valvulineria sp.
    Type: Dataset
    Format: text/tab-separated-values, 889 data points
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  • 7
    Publication Date: 2023-07-09
    Keywords: Allomorphina sp.; ALV_3709-3712_18; Alveolophragmium cf. crassimargo; Alveolophragmium cf. scitulum; Alveolophragmium subglobosum; Alveophragmium sp.; Ammobaculites agglutinans; Ammoglobigerina globigeriniformis; Ammolagena clavata; Angulogerina angulosa; Anomalina cf. colligera; Asterigerinata mamilla; Astrononion stelligerum; Bermuda, Atlantic Ocean; Bolivina albatrossi; Bolivina lowmani; Bolivina porrecta; Bolivina pseudoplicata; Bolivina sp.; Bolivina spinescens; Bolivina subaenariensis; Bolivina translucens; Brizalina dilatata; Brizalina semicostata; Brizalina spathulata; Buccella frigida granulata; Bulimina aculeata; Bulimina inflata; Bulimina marginata; Bulimina rostrata; Bulimina spicata; Bulimina striata; Buliminella elegantissima; Cancris oblongus; Cassidulina crassa; Cassidulina laevigata; Cassidulina sp.; Cassidulinoides bradyi; Chilostomella oolina; Cibicides mollis; Cibicides refulgens; Cibicides sp.; Cibicides wuellerstorfi; Counting; Cyclammina sp.; Cymbaloporetta sp.; Dentalina communis; Dentalina intorta; Dentalina leguminiformis; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Deuterammina sp.; Discoaster perplexus; Discopulvinulina sp.; Discorbis floridana; Discorbis floridensis; Discorbis sp.; Dyocibicides cf. biserialis; Eggerella bradyi; Eggerella propinqua; Eggerella scabra; Elphidium advenum; Elphidium incertum; Elphidium sp.; Eponides polius; Eponides regularis; Eponides sp.; Eponides tumidulus; Eponides turgidus; Fissurina marginata; Fissurina orbignyana; Fissurina pseudorbignyana; Fissurina quadrata; Fissurina semimarginata; Fissurina sp.; Fissurina trigonomarginata; Fursenkoina schreibersiana; Gavelinopsis lobatulus; Globocassidulina subglobosa; Globotextularia anceps; Glomospira charoides; Glomospira gordialis; Glomospira irregularis; Glomospira sp.; Guttulina communis; Gyroidina orbicularis; Gyroidina soldanii; Gyroidina sp.; Gyroidinoides laevigatus; Gyroidinoides umbonatus; Hanzawaia boueana; Haplophragmoides canariensis; Haplophragmoides sp.; Haynesina germanica; Heterolepa sp.; Hyperammina elongata; Hyperammina friabilis; Hyperammina sp.; Karreriella apicularis; Karrerulina cf. apicularis; Lagena gracilis; Lagena gracillima; Lagena laevis; Lagena malcomsonii; Lagena marginatoperforata; Lagena nebulosa; Lagena sp.; Lagena sulcata; Lamarckia sp.; Laterostomella globulosa; Laticarinina halophora; Lenticulina calcar; Lenticulina peregrina; Lepidodeuterammina ochracea; Lingulina sp.; Lobatula lobatula; Loxostomum sp.; Loxostomum truncatum; Melonis barleeanus; Melonis pompilioides; Miliolinella subrotunda; Nodellum sp.; Nodosaria calomorpha; Nodosaria flintii; Nodosaria sp.; Nonion depressulum; Nonionella atlantica; Nonionella opima; Nonionella sp.; Nonionella turgida; Nonion granosum; Nonion grateloupi; Nonion pauciloculum; Nonion sp.; Oolina apiculata; Oolina botelliformis; Oolina felsinea; Oolina hexagona; Oolina lineata; Oolina ovum; Osangularia sp.; Parafrondicularia advena; Paratrochammina cf. murray; Patellina corrugata; Planorbulina sp.; Planulina ariminensis; Plectofrondicularia inaequalis; Pleurostomella alternans; Polymorphina sp.; Praeglobobulimina affinis; Praeglobobulimina pupoides; Pseudoparrella exigua; PUC; Pullenia bulloides; Pullenia compressiuscula quadriloba; Pullenia quinqueloba; Push corer; Pyrgo depressa; Pyrulina sp.; Quadrimorphina sp.; Quinqueloculina agglutinans; Quinqueloculina compta; Quinqueloculina lamarckiana; Quinqueloculina oblonga; Quinqueloculina seminulum; Remaneica sp.; Reophax difflugiformis; Reophax fusiformis; Reophax scorpiurus; Reophax sp.; Reussella spinulosa; Rhabdammina sp.; Rhizammina algaeformis; Robertina subcylindrica; Robertinoides bradyi; Rosalina globularis; Rupertina stabilis; Saccammina sp.; Saccammina sphaerica; Saccorhiza sp.; Sagrina sp.; Seabrookia earlandi; Sphaeroidina bulloides; Spirillina vivipara; Spiroloculina sp.; Spirophthalmidium acutimargo; Stainforthia complanata; Stainforthia compressa; Stainforthia mexicana; Stainforthia sp.; Textularia parvula; Tolypammina sp.; Trifarina sp.; Triloculina tricarinata; Tritaxis cf. britannica; Trochammina advena; Trochammina cf. nitida; Trochammina nana; Trochammina nitida; Trochammina squamata; Uvigerina bradyana; Uvigerina ex gr. canariensis; Uvigerina hispidocostata; Uvigerina peregrina; Uvigerina proboscidea; Valvulineria sp.
    Type: Dataset
    Format: text/tab-separated-values, 1098 data points
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  • 8
    Publication Date: 2023-07-09
    Keywords: Alliatina sp.; ALV_3709-3712_22; Ammoglobigerina globigeriniformis; Angulogerina angulosa; Angulogerina sp.; Anomalina cf. colligera; Anomalina sp.; Astrononion stelligerum; Aurinia sp.; Bermuda, Atlantic Ocean; Bifarina decorata; Bolivina albatrossi; Bolivina cf. goesii; Bolivina fragilis; Bolivina lowmani; Bolivina minima; Bolivina pseudoplicata; Bolivina simplex; Bolivina sp.; Bolivina spinescens; Bolivina subaenariensis; Bolivina translucens; Brizalina dilatata; Brizalina spathulata; Bulimina aculeata; Bulimina cf. alazanensis; Bulimina inflata; Bulimina marginata; Bulimina sp.; Bulimina spicata; Bulimina striata; Buliminella elegantissima; Cassidulina crassa; Cassidulina laevigata; Cassidulina sp.; Cassidulinoides sp.; Ceratobulimina sp.; Chilostomella oolina; Cibicides mollis; Cibicides refulgens; Cibicides sp.; Cibicides wuellerstorfi; Counting; Cristellaria sp.; Cyclammina cancellata; Dentalina communis; Dentalina leguminiformis; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Discopulvinulina sp.; Discorbis bertheloti; Discorbis floridana; Discorbis floridensis; Discorbis sp.; Dorothia gibbosa; Eggerella bradyi; Elphidium advenum; Eponides bradyi; Eponides polius; Eponides regularis; Eponides sp.; Eponides tumidulus; Eponides turgidus; Fissurina marginata; Fissurina marginata-perforata; Fissurina orbignyana; Fissurina pseudorbignyana; Fissurina quadrata; Fissurina sp.; Florilus sp.; Fursenkoina schreibersiana; Gavelinopsis lobatulus; Gavelinopsis sp.; Glabratella sp.; Globocassidulina subglobosa; Globulina cf. inaequalis; Gyroidina orbicularis; Gyroidina soldanii; Gyroidina sp.; Gyroidinoides laevigatus; Gyroidinoides umbonatus; Haplophragmoides sp.; Hoeglundina elegans; Hyalinea balthica; Lagena flintiana; Lagena globosa; Lagena gracilis; Lagena iota; Lagena laevigata; Lagena laevis; Lagena lucida; Lagena marginatoperforata; Lagena semistriata; Lagena squamosa; Lagena staphyllearia; Lagena sulcata; Lagena trigonomarginata; Lenticulina peregrina; Lenticulina rotulata; Lepidodeuterammina ochracea; Lepidodeuterammina sp.; Loxostomum sp.; Melonis barleeanus; Melonis pompilioides; Melonis sp.; Neoconorbina opercularis; Nonion depressulum; Nonionella atlantica; Nonionella opima; Nonionella turgida; Nonion granosum; Nonion grateloupi; Nonion pauciloculum; Nonion sp.; Oolina hexagona; Osangularia sp.; Parafrondicularia advena; Patellina corrugata; Planulina ariminensis; Plectofrondicularia inaequalis; Pleurostomella alternans; Polymorphina sp.; Praeglobobulimina affinis; Praeglobobulimina pupoides; Pseudoparrella exigua; PUC; Pullenia bulloides; Pullenia quadriloba; Pullenia quinqueloba; Push corer; Pyrgo depressa; Pyrgo murrhina; Quadrimorphina sp.; Quinqueloculina compta; Quinqueloculina oblonga; Quinqueloculina sp.; Reussella spinulosa; Rhabdammina sp.; Robertina subcylindrica; Sagrina sp.; Seabrookia earlandi; Sigmoilopsis schlumbergeri; Spirillina vivipara; Stainforthia complanata; Stainforthia compressa; Stainforthia mexicana; Stainforthia sp.; Textularia parvula; Trifarina angulosa; Uvigerina bradyana; Uvigerina peregrina; Uvigerina sp.; Valvulineria araucana; Valvulineria sp.
    Type: Dataset
    Format: text/tab-separated-values, 924 data points
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  • 9
    ISSN: 1432-1157
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Clay mineralogy and trace-element geochemistry of two abyssal cores indicate that the primary source of surface-current-transported detrital material in the southern Grenada Basin changed from a continental, South American terrane to a volcanic, Lesser Antillean terrane at the end of the Pleistocene. The record of benthic foraminiferal assemblages demonstrates that the Caribbean Bottom Water (CBW) was relatively oxygen poor and less corrosive in late Pleistocene glacial times than in interglacial times. The change in the properties of CBW in the Holocene was related to a renewed influx of North Atlantic Deep Water in the Caribbean.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the World Aquaculture Society 18 (1987), S. 0 
    ISSN: 1749-7345
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Stable carbon isotope ratios (∂3C) and stomach contents were used to determine the diet of channel catfish (Ictalurus punctatus) and freshwater Malaysian prawns (Macrobrachium rosen-bergii) in polyculture. Catfish stomach contents were dominated by formulated rations. Macrophyte fragments and catfish ration were predominate in prawn stomachs. Catfish ∂13C ratios became lighter from June to October, which paralleled the change in ∂13C ratio of the formulated feeds fed to the fish. Prawn ∂13C ratios became heavier from June to October with a change in diet from seston to aquatic macrophytes and formulated catfish feed. Formulated feeds contributed 68-99% of catfish growth, and “natural” pond biota, principally insects, the remainder. Prawns depended to a greater extent on the autotrophic food web for their diet. Seston and macrophytes contributed 18-75% of prawn growth, and formulated feeds the remainder. The prawns fed on seston at small sizes (〈7 g) and consumed more aquatic macrophytes and formulated catfish ration at larger sizes (〈7 g).
    Type of Medium: Electronic Resource
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