10,466 Works

Fatty acids and intact polar lipids of laminated microbial sediments from St. Peter Ording, German Wadden Sea, supplement to: Bühring, Solveig I; Kamp, Anja; Wörmer, Lars; Ho, Stephanie; Hinrichs, Kai-Uwe (2014): Functional structure of laminated microbial sediments from a supratidal sandy beach of the German Wadden Sea (St. Peter-Ording). Journal of Sea Research, 85, 463-473

Solveig I Bühring, Anja Kamp, Lars Wörmer, Stephanie Ho & Kai-Uwe Hinrichs
Hidden for the untrained eye through a thin layer of sand, laminated microbial sediments occur in supratidal beaches along the North Sea coast. The inhabiting microbial communities organize themselves in response to vertical gradients of light, oxygen or sulfur compounds. We performed a fine-scale investigation on the vertical zonation of the microbial communities using a lipid biomarker approach, and assessed the biogeochemical processes using a combination of microsensor measurements and a 13C-labeling experiment. Lipid biomarker...

Density and biomass of two copepod size fractions and various species obtained during Almirante Irizar cruises to the Drake Passage and Scotia Sea (2000-2003), supplement to: Thompson, Gustavo A; Dinofrio, Estela O; Alder, Viviana A (2011): Interannual fluctuations in copepod abundance and contribution of small forms in the Drake Passage during austral summer. Helgoland Marine Research, 66(2), 127-138

Gustavo A Thompson, Estela O Dinofrio & Viviana A Alder
The relative importance of small forms of copepods has been historically underestimated by the traditional use of 200-300-µm mesh nets. This work quantified the distribution and abundance of copepods, considering two size fractions (<300 µm and >300 µm), in superficial waters (9 m deep) of the Drake Passage and contributed to the knowledge of their interannual fluctuations among three summers. Four types of nauplii and eleven species of copepods at copepodite and adult stages were...

Biogeochemical investigation of cold seep sediments in the Eastern Mediterranean Sea, supplement to: Pop Ristova, Petra; Wenzhöfer, Frank; Ramette, Alban; Felden, Janine; Boetius, Antje (2014): Spatial scales of bacterial community diversity at cold seeps (Eastern Mediterranean Sea). The ISME Journal, 1-13

Petra Pop Ristova, Frank Wenzhöfer, Alban Ramette, Janine Felden & Antje Boetius
Cold seep ecosystems are highly productive, fragmented ecosystems of the deep-sea floor. They form worldwide where methane reaches the surface seafloor, and are characterized by rich chemosynthetic communities fueled by the microbial utilization of hydrocarbons. Here we investigated with in situ (benthic chamber, microprofiler) and ex situ (pore water constituents, turnover rates of sulfate and methane, prokaryote abundance) techniques reduced sites from three different seep ecosystems in the Eastern Mediterranean deep-sea. At all three cold...

Establishment, expansion and regeneration of aspen (Populus tremula) in the Torneträsk area, subarctic Sweden, supplement to: Van Bogaert, Rik; Jonasson, Christer; De Dapper, Morgan; Callaghan, Terry V (2010): Range expansion of thermophilic aspen (Populus tremula L.) in the swedish Subarctic. Arctic, Antarctic, and Alpine Research, 42(3), 362-375

Rik Van Bogaert, Christer Jonasson, Morgan De Dapper & Terry V Callaghan
In subarctic Sweden, recent decadal colonization and expansion of aspen (Populus tremula L.) were recorded. Over the past 100 years, aspen became c. 16 times more abundant, mainly as a result of increased sexual regeneration. Moreover, aspen now reach tree-size (>2 m) at the alpine treeline, an ecotone that has been dominated by mountain birch (Betula pubescens ssp. czerepanovii) for at least the past 4000 years. We found that sexual regeneration in aspen probably occurred...

Photosynthetic production in the Central Arctic during POLARSTERN cruise ARK-XXVII/3 (IceArc) in 2012, supplement to: Fernández-Méndez, Mar; Katlein, Christian; Rabe, Benjamin; Nicolaus, Marcel; Peeken, Ilka; Bakker, Karel; Flores, Hauke; Boetius, Antje (2015): Photosynthetic production in the central Arctic Ocean during the record sea-ice minimum in 2012. Biogeosciences, 12, 3525-3549

Mar Fernández-Méndez, Benjamin Rabe, Christian Katlein, Marcel Nicolaus, Ilka Peeken & Antje Boetius
The ice-covered Central Arctic Ocean is characterized by low primary productivity due to light and nutrient limitations. It has been speculated that the recent reduction in ice cover could lead to a substantial increase in primary production, but still little is known as to the fate of the ice-associated primary production, and of nutrient supply with increasing warming. This study presents results from the Central Arctic Ocean collected during summer 2012, when sea-ice reached a...

Pliocene sediment and silicon isotope record of ODP Site 145-882, supplement to: Bailey, Ian; Liu, Qingsong; Swann, George E A; Jiang, Zhaoxia; Sun, Youbin; Zhao, Xiang; Roberts, Andrew P (2011): Iron fertilisation and biogeochemical cycles in the sub-Arctic northwest Pacific during the late Pliocene intensification of northern hemisphere glaciation. Earth and Planetary Science Letters, 307(3-4), 253-265

Ian Bailey, Qingsong Liu, George E A Swann, Zhaoxia Jiang, Youbin Sun, Xiang Zhao & Andrew P Roberts
Increases in the low-field mass-specific magnetic susceptibility (chi), dropstones and the terrigenous sediment component from Ocean Drilling Program (ODP) Site 882 (~45°N) have been interpreted to indicate a major onset of ice-rafting to the sub-Arctic northwest Pacific Ocean during marine isotope stage (MIS) G6 (from ~2.75 Ma). In contrast, studies of the terrigenous content of sediments cored downwind of ODP Site 882 indicate that dust and disseminated volcanic ash deposition in the sub-Arctic Pacific increased...

Natural gamma ray and stable isotope record of ODP Site 181-1119, supplement to: Carter, Robert M; Gammon, Paul (2004): New Zealand Maritime Glaciation: Millennial-Scale Southern Climate Change Since 3.9 Ma. Science, 304(5677), 1659-1662

Robert M Carter & Paul Gammon
Ocean Drilling Program Site 1119 is ideally located to intercept discharges of sediment from the mid-latitude glaciers of the New Zealand Southern Alps. The natural gamma ray signal from the site's sediment core contains a history of the South Island mountain ice cap since 3.9 million years ago (Ma). The younger record, to 0.37 Ma, resembles the climatic history of Antarctica as manifested by the Vostok ice core. Beyond, and back to the late Pliocene,...

Nutrient concentration profiles from time series stations E1 and L4 in the western English Channel from 2000 to 2010

E Malcolm S Woodward, Carolyn Harris & Lisa Al-Moosawi
The marine laboratories in Plymouth have sampled at two principle sites in the Western English Channel for over a century in open-shelf (station E1; 50° 02'N, 4° 22'W) and coastal (station L4; 50° 15'N, 4° 13'W) waters. These stations are seasonally stratified from late-April until September, and the variable biological response is regulated by subtle variations in temperature, light, nutrients and meteorology. Station L4 is characterized by summer nutrient depletion, although intense summer precipitation, increasing...

Calcareous nannofossil assemblages of Ocean Anoxic Event 2 in ODP Sites 207-1258 and 207-1260, supplement to: Hardas, Petros; Mutterlose, Jörg (2007): Calcareous nannofossil assemblages of Oceanic Anoxic Event 2 in the equatorial Atlantic: Evidence of an eutrophication event. Marine Micropaleontology, 66(1), 52-69

Petros Hardas & Jörg Mutterlose
The calcareous nannofossils of the Cenomanian/Turonian boundary interval of Sites 1258 and 1260 (Ocean Drilling Program Leg 207) have been studied in order to understand the depositional environment during Oceanic Anoxic Event 2 (OAE2) in the equatorial Atlantic. Nannofossil assemblages show a significant change in relative abundances during the positive d13Corg excursion interval. The strong increase of the high productivity indicator Zeugrhabdotus erectus and the simultaneous decrease of the oligotrophic taxa Watznaueria barnesiae and Watznaueria...

Composition and accumulation rates of eolian sediments in ODP Site 128-798, supplement to: Dersch, Michaela; Stein, Ruediger (1992): Pliocene-Pleistocene fluctuations in composition and accumulation rates of eolo-marine sediments at Site 798 (Oki Ridge, Sea of Japan) and climatic change: preliminary results. In: Pisciotto, KA; Ingle, JCJr.; von Breymann, MT; Barron, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 127/128(1), 409-422

Michaela Dersch & Ruediger Stein
Preliminary bulk and clay mineralogy data as determined by XRD as well as accumulation rates of quartz and feldspar at Oki Ridge Site 798 give important information about the paleoclimate in Asia and transport mechanisms of the siliciclastic sediment fraction. The (?uppermost Miocene/) lowermost Pliocene sediments at ODP Site 798 are characterized by high amounts of feldspars, smectites, and additionally abundant sand-sized terrigenous components. This is taken as an indication for turbiditycurrent-influenced deposition and a...

Ripple migration directions and grain fabric measurements on ODP Hole 210-1276A sediments, supplement to: Hiscott, Richard N (2007): Paleoflow directions of Albian basin-floor turbidity currents in the Newfoundland Basin. In Tucholke, B.E., Sibuet, J.-C., and Klaus, A. (Eds.), Proc. ODP, Sci. Results, 210 : College Station, TX (Ocean Drilling Program), 210, 1-27

Richard N Hiscott
Albian turbidites and intercalated shales were cored from ~1145 to 1700 meters below seafloor at Site 1276 in the Newfoundland Basin. Strata at this level dip ~2.5° seaward (toward an azimuth of ~130°) based on seismic profiles. In contrast, beds dip an average of ~10° in the cores. This higher apparent dip is the sum of the ~2.5° seaward dip and a measured hole deviation of 7.43°, which must be essentially in the same seaward...

Magnetic susceptibility of deep-sea cores from the Scotia Sea, supplement to: Weber, Michael E; Kuhn, Gerhard; Sprenk, Daniela; Rolf, Christian; Ohlwein, Christian; Ricken, Werner (2012): Dust transport from Patagonia to Antarctica - a new stratigraphic approach from the Scotia Sea and its implications for the last glacial cycle. Quaternary Science Reviews, 36, 177-188

Michael E Weber, Gerhard Kuhn, Daniela Sprenk, Christian Rolf, Christian Ohlwein & Werner Ricken
We studied two deep-sea cores from the Scotia Sea to reconstruct past atmospheric circulation in the southern hemisphere and to resolve a long-standing debate on the interpretation of magnetic susceptibility (MS) records in Southern Ocean (SO) sediment. High-sedimentation sites MD07-3134 (0.2 - 1.2 m/kyr) and MD07-3133 (0.3 - 2 m/kyr) cover the last 92.5 kyr and 36 kyr, respectively. Both exhibit a one-to-one coupling of the MS and Ca2+ signal to the non-sea salt (nss)...

Planktonic foraminifera of sediment core MD01-2390, supplement to: Steinke, Stephan; Yu, Pai-Sen; Kucera, Michal; Chen, Min-Te (2008): No-analog planktonic foraminiferal faunas in the glacial southern South China Sea: Implications for the magnitude of glacial cooling in the western Pacific warm pool. Marine Micropaleontology, 66(2), 71-90

Stephan Steinke, Pai-Sen Yu, Michal Kucera & Min-Te Chen
Sea-surface temperature (SST) estimates in the sediment core MD01-2390 based on planktonic foraminiferal species abundances using five different transfer function techniques suggest nearly unchanged or unusually higher temperatures in the tropical southern South China Sea (SCS) during the Last Glacial Maximum (LGM) relative to modern temperatures. These results are in contrast to substantial cooling of 2-5 °C inferred by geochemical (Uk'37, Mg/Ca ratios) and terrestrial proxies from the western tropical Pacific region. Using multivariate statistics...

Manganese contents and accumulation rates in reduced bottom sediments of the Sea of Okhotsk, supplement to: Astakhov, Anatolii S; Gorbarenko, Sergey A; Vashchenkova, N G; Volokhin, Yu G (2000): Manganese distribution and accumulation rates in bottom sediments of the Sea of Okhotsk. Tikhookeanskaya Geologiya (Pacific Geology), 19(5), 47-60

Anatolii S Astakhov, Sergey A Gorbarenko, N G Vashchenkova & Yu G Volokhin
Manganese contents in reduced sediments and accumulation rates were investigated. Their values in sediments of most of cores are background (0.03-0.07 %).Anomalous concentrations (up to 2.5 %) and accumulation rates (up to 60 mg/cm**2/ka) occur near the known region of hydrothermal barite mineralization in the Derugin Basin. High accumulation rates of Mn (>10 mg/cm**2/ka) also occur in Holocene sediments to south-east from the Derugin Basin. It can be assumed that high Mn contents and accumulation...

Mineral chemistry of primary and secondary phases in basaltic rocks, supplement to: Rowbotham, G; Floyd, Peter A (1992): Mineral chemistry of primary and secondary phases in basaltic rocks, Leg 129. In: Larson, RL; Lancelot, Y; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 129, 305-434

G Rowbotham & Peter A Floyd
Primary magmatic phases (spinel, olivine, plagioclase, clinopyroxene, amphibole, and biotite) and secondary phyllosilicates (smectite, chlorite-smectite, and celadonite) were analyzed by electron microprobe in alkalic and tholeiitic dolerites and basalts from Ocean Drilling Program Sites 800, 801, and 802. Aphyric alkalic dolerite sills (Hole 800A) and basalt flows (Holes 801B and 801C) share common mineralogical features: matrix feldspars are strongly zoned from labradorite cores to discrete sodic rims of alkali feldspar with a high Or component,...

Averaged sedimentation rates in the Northwest Pacific and Bering Sea during the first and the second oxygen isotope stages, supplement to: Gorbarenko, Sergey A; Artemova, Antonina V (2003): Chronostratigraphy of Upper Quaternary sediments of the Northwestern Pacific and the Bering Sea, change of the environment and productivity of the region. Tikhookeanskaya Geologiya (Pacific Geology), 22(5), 23-38

Sergey A Gorbarenko & Antonina V Artemova
Isotope chronostratigraphy of Upper Quaternary sediments from the Northwest Pacific and the Bering Sea was established by oxygen isotope records in planktonic and benthic foraminifera. The main regularities of temporal variations of calcium carbonate, organic carbon and opal contents, as well as of magnetic susceptibility in sediments of the study region with regard to climatic variations and productivity were established by means of isotopic-geochemical and lithophysical analyses of bottom sediments. Correlation of volcanogenic interbeds in...

K-Ar age and chemical composition of volcanites from the Sea of Okhotsk, supplement to: Emelyanova, T A; Lelikov, Evgeny P; Sedin, V T; Naryzhnyy, V L (2003): Geology and features of volcanism on the Sea of Okhotsk floor. Tikhookeanskaya Geologiya (Pacific Geology), 22(4), 3-18

T A Emelyanova, Evgeny P Lelikov, V T Sedin & V L Naryzhnyy
Volcanogenic rocks from the Sea of Okhotsk are divided into seven age complexes: Late Jurassic, Early Cretaceous, Late Cretaceous, Eocene, Late Oligocene, Late Miocene, and Pliocene-Pleistocene. All these complexes are united into two groups - Late Mesozoic and Cenozoic. Each group reflects a certain stage of development of the Sea of Okhotsk region. Late Mesozoic volcanites build the geological basement of the Sea of Okhotsk, and their petrochemical features are similar to those of the...

Mössbauer characterisation of sediments from ODP Sites 128-798 and 128-799, supplement to: Minai, Yoshitaka; Kusudo, Iori; Matsumoto, Ryo; Sato, Haruo; Tominaga, Takeshi (1992): Mössbauer characterization of sediments from Sites 798 and 799, Japan Sea. In: Pisciotto, KA; Ingle, JCJr.; von Breymann, MT; Barron, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 127/128(1), 739-746

Yoshitaka Minai, Iori Kusudo, Ryo Matsumoto, Haruo Sato & Takeshi Tominaga
57Fe Mössbauer spectra for 26 sediment and 6 carbonate concretion samples from Sites 798 and 799 were recorded at 293 K. Most spectra were deconvolved to two quadrupole doublets without magnetic hyperfine structure. Typical Mössbauer parameters were: isomer shift (I.S.) = 0.34 mm/s and quadrupole splitting (Q.S.) = 0.64 mm/s for the paramagnetic Fe3+ component (partly, pyrite); I.S. = 1.13 mm/s and Q.S. = 2.64 mm/s for the high-spin Fe2+ component derived from iron-bearing aluminosilicates....

Late Miocene Xianfeng palaeoflora and palaeoclimate of Yunnan Province, southwestern China, supplement to: Xing, Yao-Wu; Utescher, Torsten; Jacques, Frédéric M B; Su, Tao; Liu, Yu-Sheng Christopher; Huang, Yong-Jiang; Zhou, Zhekun (2012): Palaeoclimatic estimation reveals a weak winter monsoon in southwestern China during the late Miocene: Evidence from plant macrofossils. Palaeogeography, Palaeoclimatology, Palaeoecology, 358-360, 19-26

Yao-Wu Xing, Torsten Utescher, Frédéric M B Jacques, Tao Su, Yu-Sheng Christopher Liu, Yong-Jiang Huang & Zhekun Zhou
The late Miocene Xianfeng flora of Yunnan Province, southwestern China, was chosen to reconstruct the paleoclimate and the intensity of the Asian monsoon. Three available quantitative climate reconstruction methods from fossil plants, i.e. Leaf Margin Analysis (LMA), the Climate Leaf Analysis Multivariate Program (CLAMP), and the Coexistence Approach (CA) were used in this study. MATs (mean annual temperatures) resulting from these three approaches (i.e., LMA: 17.2 ± 2.38 °C; CLAMP: 15.43 ± 1.25 °C; CA:...

Composition of airborne material from yellow snow fallen in the Russian North, supplement to: Shevchenko, Vladimir P; Korobov, V B; Lisitzin, Alexander P; Aleshinskaya, A S; Bogdanova, Olga Yu; Goryunova, V B; Grishchenko, I V; Dara, O M; Zavernina, N N (2010): First data on the composition of atmospheric dust responsible for yellow snow in Northern European Russia in March 2008. Translated from: Doklady Akademii Nauk, 2010, 431(5), 675-679, Doklady Earth Sciences, 431(2), 497-501

Vladimir P Shevchenko, V B Korobov, Alexander P Lisitzin, A S Aleshinskaya, Olga Yu Bogdanova, V B Goryunova, I V Grishchenko, O M Dara & N N Zavernina
Large amounts of dust responsible for bright colors of atmospheric precipitation in the temperate, subpolar and polar zones of the northern hemisphere have been rarely observed. In the twentieth century and in the beginning of the twenty first century in the Northern European Russia such events were not registered up to March 25-26, 2008. At that time in some parts of the Arkhangel'sk region, Komi Republic, and Nenets Autonomous Area atmospheric precipitation as sleet and...

Temperature and salinity profiles at 10 m depth resolution from time series station E1 in the western English Channel from 1903 to 2011

Timothy J Smyth, Nicolas J Hardman-Mountford, Matthew Frost & James R Fishwick
Datasets contains depth profiles of temperature and salinity data extractions at 10 m depth intervals for the Western Channel Observatory long-term hydrographic series at station E1 (50 02'N; 4 22'W) in the western English Channel. The 10 m extractions have been determined from the closest depth bin measurement. They do not represent the average over a 10 m slab of the water column, but rather a slab around 0.25 m thick for the electronic measurements.

Phospholipid fatty acid and quinone composition of sediments from ODP Leg 205 sites, supplement to: Cardace, Dawn; Morris, Julie; Peacock, Aaron D; White, David C (2006): Habitability of subseafloor sediments at the Costa Rica convergent margin. In: Morris, JD; Villinger, HW; Klaus, A (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 205, 1-26

Dawn Cardace, Julie Morris, Aaron D Peacock & David C White
Assessing the habitability of deep-sea sediments undergoing compaction, compression, and subduction at convergent margins adds to our understanding of the limits of the terrestrial biosphere. In this work, we report exploratory biomarker data on sediments obtained at Ocean Drilling Program (ODP) Sites 1253, 1254, and 1255 during drilling at the Costa Rica subduction trench and forearc sedimentary wedge. The samples selected for postcruise biomarker analyses were located within intervals of potentially enhanced fluid flow within...

Benthic foraminifera in Northwest Indian Ocean surface sediments

J Otto R Hermelin & Graham Shimmield
The relationship between the distribution of benthic foraminifera and sediment type and depositional environment in the Arabian Sea is discussed. The benthic foraminiferal fauna were sampled in nineteen Recent surface sediment samples, and geochemical variables of the sediment of the same samples were measured. The water depths for the box core samples varies from 440 to 4040 m. A total of 103 species and six species-complexes were identified.The geochemical properties were found to correspond well...

Physical properties measured on 45 sediment cores from METEOR cruise M41/1

Horst D Schulz, Katharina Däumler, Jens Funk, Christian Hilgenfeldt & Hanno von Lom-Keil
The complete sediment series recovered with the gravity corer during METEOR cruise M 41/1 were subjected to laboratory geophysical studies. Shipboard measurements on the segmented cores routinely comprised three basic physical parameters: - compressional (p-) wave velocity vp, - electric resistivity Rs (as a measure of density and porosity), - magnetic volume susceptibility K.These properties are closely related to lithology and grain-size of the sediments and provide high-resolution core logs (spacing 1 cm for p-wave...

Physical properties measured on 52 sediment cores from METEOR cruise M46/2

Karl Fabian, Jens Funk, Matthias Gorke, A Neto, Tilmann Schwenk, Thomas Frederichs, Christian Hilgenfeldt, Tilo von Dobeneck & Frank Schmieder
A large fraction of the sediment series recovered during METEOR Cruise M 46/2 with the gravity corer were subject to laboratory geophysical studies. Shipboard measurements on the segmented cores routinely comprised three basic physical parameters: - compressional (p-) wave velocity vp, electric resistivity Rs (as a measure of density and porosity), and, magnetic volume susceptibility.These properties are closely related to lithology and grain size of the sediments and provide high- resolution core logs (spacing 1...

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  • University of Iowa
  • Leibniz-Zentrum für Marine Tropenforschung, Bremen, Germany
  • Charles Darwin Foundation
  • Deutsches Institut für Entwicklungspolitik
  • Leibniz-Institut für Medienforschung | Hans-Bredow-Institut
  • Alfred Wegener Institute - Research Unit Potsdam
  • Alfred Wegener Institute - Wadden Sea Station Sylt
  • Naturhistorisches Museum Basel
  • Boston University