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  • 1
    Online Resource
    Online Resource
    On Gaia : A Critical Investigation of the Relationship Between Life and Earth. (2013)
    Princeton :Princeton University Press,
    Details
    Keywords: Electronic books.
    Description / Table of Contents: No detailed description available for "On Gaia".
    Type of Medium: Online Resource
    Pages: 1 online resource (325 pages)
    Edition: 1st ed.
    ISBN: 9781400847914
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=1184270
    DDC: 570.1
    Language: English
    Note: Cover -- Title -- Copyright -- TABLE OF CONTENTS -- Preface -- 1. Gaia, the Grand Idea -- 2. Good Citizens or Selfish Genes? -- 3. Life at the Edge: Lessons from Extremophiles -- 4. Temperature Paces Life -- 5. Icehouse Earth -- 6. Given Enough Time . . . -- 7. Evolutionary Innovations and Environmental Change -- 8. A Stable or an Unstable World? -- 9. The Puzzle of Life's Long Persistence -- 10. Conclusions -- Notes -- Further Reading -- References -- Acknowledgments -- Index.
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  • 2
    Electronic Resource
    Electronic Resource
    reply: Oceanography Iron, nitrogen and phosphorus in the ocean (1999)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 402 (1999), S. 372-372 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Tyrrell repliesCullen shows that changing the values of PH and NH (KS[PO4] and KS[NO3] in his notation) in my model can give rise to a steady-state [NO3]:[PO4] ratio in surface waters ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/46472
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The relative influences of nitrogen and phosphorus on oceanic primary production (1999)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 400 (1999), S. 525-531 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A simple model has the potential to resolve the long-running debate amongst oceanographers over whether nitrogen or phosphorus exerts overall control on oceanic primary production. A representation of the competition between nitrogen-fixing and other phytoplankton is inserted into a two-box global ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/22941
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    Paper (German National Licenses)
    Fulltext
  • 4
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    Coccolithophore size, abundance and calcification across Drake Passage (Southern Ocean), 2009
    PANGAEA
    In:  Supplement to: Charalampopoulou, Anastasia; Poulton, Alex J; Bakker, Dorothee C E; Lucas, Mike I; Stinchcombe, Mark Colin; Tyrrell, Toby (2016): Environmental drivers of coccolithophore abundance and calcification across Drake Passage (Southern Ocean). Biogeosciences, 13(21), 5917-5935, https://doi.org/10.5194/bg-13-5917-2016
    Details
    Publication Date: 2023-05-12
    Description: Although coccolithophores are not as numerically common or as diverse in the Southern Ocean as they are in subpolar waters of the North Atlantic, a few species, such as Emiliania huxleyi, are found during the summer months. Little is actually known about the calcite production (CP) of these communities or how their distribution and physiology relate to environmental variables in this region. In February 2009, we made observations across Drake Passage (between South America and the Antarctic Peninsula) of coccolithophore distribution, CP, primary production, chlorophyll a and macronutrient concentrations, irradiance and carbonate chemistry. Although CP represented less than 1 % of total carbon fixation, coccolithophores were widespread across Drake Passage. The B/C morphotype of E. huxleyi was the dominant coccolithophore, with low estimates of coccolith calcite (~0.01 pmol C coccolith-1) from biometric measurements. Both cell-normalised calcification (0.01-0.16 pmol C cell-1 d-1) and total CP (〈 20 µmol C m-3 d-1) were much lower than those observed in the subpolar North Atlantic where E. huxleyi morphotype A is dominant. However, estimates of coccolith production rates were similar (0.1 1.2 coccoliths cell-1 h-1) to previous measurements made in the subpolar North Atlantic. A multivariate statistical approach found that temperature and irradiance together were best able to explain the observed variation in species distribution and abundance (Spearman's rank correlation p = 0.4, p 〈 0.01). Rates of calcification per cell and coccolith production, as well as community CP and E. huxleyi abundance, were all positively correlated (p 〈 0.05) to the strong latitudinal gradient in temperature, irradiance and calcite saturation states across Drake Passage. Broadly, our results lend support to recent suggestions that coccolithophores, especially E. huxleyi, are advancing polewards. However, our in situ observations indicate that this may owe more to sea-surface warming and increasing irradiance rather than increasing CO2 concentrations.
    Keywords: EPOCA; European Project on Ocean Acidification
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 5
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    Global distributions of diazotrophs abundance, biomass and nitrogen fixation rates - Gridded data product (NetCDF) - Contribution to the MAREDAT World Ocean Atlas of Plankton Functional Types (2012)
    PANGAEA
    In:  Supplement to: Luo, Yawei; Doney, Scott C; Anderson, L A; Benavides, Mar; Berman-Frank, I; Bode, Antonio; Bonnet, S; Boström, Kjärstin H; Böttjer, D; Capone, D G; Carpenter, E J; Chen, Yaw-Lin; Church, Matthew J; Dore, John E; Falcón, Luisa I; Fernández, A; Foster, R A; Furuya, Ken; Gomez, Fernando; Gundersen, Kjell; Hynes, Annette M; Karl, David Michael; Kitajima, Satoshi; Langlois, Rebecca; LaRoche, Julie; Letelier, Ricardo M; Marañón, Emilio; McGillicuddy Jr, Dennis J; Moisander, Pia H; Moore, C Mark; Mouriño-Carballido, Beatriz; Mulholland, Margaret R; Needoba, Joseph A; Orcutt, Karen M; Poulton, Alex J; Rahav, Eyal; Raimbault, Patrick; Rees, Andrew; Riemann, Lasse; Shiozaki, Takuhei; Subramaniam, Ajit; Tyrrell, Toby; Turk-Kubo, Kendra A; Varela, Manuel; Villareal, Tracy A; Webb, Eric A; White, Angelicque E; Wu, Jingfeng; Zehr, Jonathan P (2012): Database of diazotrophs in global ocean: abundance, biomass and nitrogen fixation rates. Earth System Science Data, 4, 47-73, https://doi.org/10.5194/essd-4-47-2012
    Details
    Publication Date: 2023-03-27
    Description: The MAREDAT atlas covers 11 types of plankton, ranging in size from bacteria to jellyfish. Together, these plankton groups determine the health and productivity of the global ocean and play a vital role in the global carbon cycle. Working within a uniform and consistent spatial and depth grid (map) of the global ocean, the researchers compiled thousands and tens of thousands of data points to identify regions of plankton abundance and scarcity as well as areas of data abundance and scarcity. At many of the grid points, the MAREDAT team accomplished the difficult conversion from abundance (numbers of organisms) to biomass (carbon mass of organisms). The MAREDAT atlas provides an unprecedented global data set for ecological and biochemical analysis and modeling as well as a clear mandate for compiling additional existing data and for focusing future data gathering efforts on key groups in key areas of the ocean. This is a gridded data product about diazotrophic organisms . There are 6 variables. Each variable is gridded on a dimension of 360 (longitude) * 180 (latitude) * 33 (depth) * 12 (month). The first group of 3 variables are: (1) number of biomass observations, (2) biomass, and (3) special nifH-gene-based biomass. The second group of 3 variables is same as the first group except that it only grids non-zero data. We have constructed a database on diazotrophic organisms in the global pelagic upper ocean by compiling more than 11,000 direct field measurements including 3 sub-databases: (1) nitrogen fixation rates, (2) cyanobacterial diazotroph abundances from cell counts and (3) cyanobacterial diazotroph abundances from qPCR assays targeting nifH genes. Biomass conversion factors are estimated based on cell sizes to convert abundance data to diazotrophic biomass. Data are assigned to 3 groups including Trichodesmium, unicellular diazotrophic cyanobacteria (group A, B and C when applicable) and heterocystous cyanobacteria (Richelia and Calothrix). Total nitrogen fixation rates and diazotrophic biomass are calculated by summing the values from all the groups. Some of nitrogen fixation rates are whole seawater measurements and are used as total nitrogen fixation rates. Both volumetric and depth-integrated values were reported. Depth-integrated values are also calculated for those vertical profiles with values at 3 or more depths.
    Keywords: MAREMIP; MARine Ecosystem Model Intercomparison Project
    Type: Dataset
    Format: application/zip, 1.7 MBytes
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    DATA PANGAEA
  • 6
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    Seawater carbonate chemistry and nutrients between United Kingdom and Spain, 2008-2009 (2009)
    PANGAEA
    In:  National Oceanography Centre, Southampton
    Details
    Publication Date: 2023-02-24
    Keywords: Alkalinity, total; Calculated from pressure, temperature, and conductivity; Carbon, inorganic, dissolved; Coulometric titration; DATE/TIME; DEPTH, water; EPOCA; European Project on Ocean Acidification; LATITUDE; LONGITUDE; Measured; Nitrate and Nitrite; Phosphate; Potentiometric titration, VINDTA (marianda); Salinity; Seal QuAAtro SFA Analyzer, Seal Analytical, 800 TM; Silicate; Site; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 2312 data points
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    DATA PANGAEA
  • 7
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    Emiliania huxleyi distal shield length across Drake Passage (Southern Ocean), 2009
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Emiliania huxleyi, distal shield, length; EPOCA; European Project on Ocean Acidification; LATITUDE; LONGITUDE; Measured using software ImageJ; Sample ID; Site
    Type: Dataset
    Format: text/tab-separated-values, 3000 data points
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    DATA PANGAEA
  • 8
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    Coccolithophore abundance and calcification across Drake Passage (Southern Ocean), 2009
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Acanthoica quattrospina; Calcidiscus leptoporus; Calcification rate, standard deviation; Calcification rate of calcium carbonate; Calciopappus caudatus; Chlorophyll a; Coccolithophoridae, total; CTD; DATE/TIME; DEPTH, water; Depth of the euphotic zone; Emiliania huxleyi; Emiliania huxleyi, coccoliths, detached; EPOCA; European Project on Ocean Acidification; Gephyrocapsa ericsonii; Gephyrocapsa muellerae; Gephyrocapsa ornata; Identification; LATITUDE; LONGITUDE; Micro-diffusion technique of Paasche & Brubak 1994 modified by Balch etal 2000; Mixed layer depth; Nitrate and Nitrite; Ophiaster hydroideus; Ophiaster sp.; Pappomonas sp.; Papposphaera arctica; Papposphaera sp.; Phosphate; Pigments, Turner fluorometer; Primary production of carbon, standard deviation; Primary production of carbon per day; Radiation, photosynthetically active; Rhabdosphaera xiphos; Salinity; Scanning electron microscope (Leo 1450VP, Carl Zeiss) with software SmartSEM; Silicate; Syracosphaera dilatata; Syracosphaera halldalii; Syracosphaera molischii; Temperature, water; Wigwamma antarctica; Wigwamma scenozion; Wigwamma triradiata
    Type: Dataset
    Format: text/tab-separated-values, 3169 data points
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    DATA PANGAEA
  • 9
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    Coccolithophore distributions in seawater between United Kingdom and Spain, 2006-2010
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Coccolithophoridae, other; Coccolithophoridae, total; Coccolithophoridae sp., overcalcified; Counting, coccoliths; DATE/TIME; DEPTH, water; EPOCA; European Project on Ocean Acidification; LATITUDE; LONGITUDE; Scanning electron microscope (SEM); Volume
    Type: Dataset
    Format: text/tab-separated-values, 2447 data points
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    DATA PANGAEA
  • 10
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    Abundance and calculated biomass of Trichodesmium spp. in the Atlantic Ocean (2013)
    PANGAEA
    Details
    Publication Date: 2023-07-08
    Keywords: AMT1/1995-09-25; AMT1/1995-09-26; AMT1/1995-09-27; AMT1/1995-09-28; AMT1/1995-09-29; AMT1/1995-09-30; AMT1/1995-10-02; AMT1/1995-10-03; AMT1/1995-10-04; AMT1/1995-10-05; AMT1/1995-10-06; AMT1/1995-10-07; AMT1/1995-10-08; AMT1/1995-10-09; AMT1/1995-10-10; AMT1/1995-10-11; AMT1/1995-10-12; AMT1/1995-10-13; AMT1/1995-10-14; AMT1/1995-10-15; AMT1/1995-10-16; AMT1/1995-10-17; AMT1/1995-10-18; AMT1/1995-10-19; AMT1/1995-10-20; AMT10/2000-04-15; AMT10/2000-04-17; AMT10/2000-04-19; AMT10/2000-04-20; AMT10/2000-04-22; AMT10/2000-04-23; AMT10/2000-04-24; AMT10/2000-04-25; AMT10/2000-04-26; AMT10/2000-04-28; AMT10/2000-04-29; AMT10/2000-05-01; AMT10/2000-05-02; AMT2/1996-04-23; AMT2/1996-04-24; AMT2/1996-04-25; AMT2/1996-04-29; AMT2/1996-04-30; AMT2/1996-05-01; AMT2/1996-05-02; AMT2/1996-05-03; AMT2/1996-05-04; AMT2/1996-05-05; AMT2/1996-05-06; AMT2/1996-05-07; AMT2/1996-05-08; AMT2/1996-05-09; AMT2/1996-05-10; AMT2/1996-05-11; AMT2/1996-05-12; AMT2/1996-05-14; AMT2/1996-05-15; AMT2/1996-05-16; AMT2/1996-05-17; AMT2/1996-05-18; AMT2/1996-05-19; AMT2/1996-05-20; AMT2/1996-05-21; AMT3/1996-09-24; AMT3/1996-09-25; AMT3/1996-09-26; AMT3/1996-09-27; AMT3/1996-09-28; AMT3/1996-09-29; AMT3/1996-09-30; AMT3/1996-10-02; AMT3/1996-10-03; AMT3/1996-10-04; AMT3/1996-10-05; AMT3/1996-10-06; AMT3/1996-10-07; AMT3/1996-10-08; AMT3/1996-10-09; AMT3/1996-10-10; AMT3/1996-10-11; AMT3/1996-10-12; AMT3/1996-10-13; AMT3/1996-10-14; AMT3/1996-10-15; AMT3/1996-10-16; AMT3/1996-10-23; AMT3/1996-10-24; AMT3/1996-10-25; AMT4/1997-04-21; AMT4/1997-04-22; AMT4/1997-04-23; AMT4/1997-04-30; AMT4/1997-05-01; AMT4/1997-05-02; AMT4/1997-05-03; AMT4/1997-05-04; AMT4/1997-05-05; AMT4/1997-05-06; AMT4/1997-05-07; AMT4/1997-05-08; AMT4/1997-05-09; AMT4/1997-05-10; AMT4/1997-05-11; AMT4/1997-05-12; AMT4/1997-05-13; AMT4/1997-05-14; AMT4/1997-05-15; AMT4/1997-05-16; AMT4/1997-05-17; AMT4/1997-05-18; AMT4/1997-05-19; AMT4/1997-05-20; AMT4/1997-05-21; AMT4/1997-05-22; AMT4/1997-05-23; AMT5/1997-09-17; AMT5/1997-09-18; AMT5/1997-09-19; AMT5/1997-09-20; AMT5/1997-09-21; AMT5/1997-09-22; AMT5/1997-09-25; AMT5/1997-09-26; AMT5/1997-09-27; AMT5/1997-09-28; AMT5/1997-09-29; AMT5/1997-09-30; AMT5/1997-10-01; AMT5/1997-10-02; AMT5/1997-10-03; AMT5/1997-10-04; AMT5/1997-10-05; AMT5/1997-10-06; AMT5/1997-10-07; AMT5/1997-10-08; AMT5/1997-10-09; AMT5/1997-10-10; AMT5/1997-10-11; AMT5/1997-10-12; AMT5/1997-10-13; AMT5/1997-10-14; AMT5/1997-10-15; AMT5/1997-10-16; AMT6/1998-05-16; AMT6/1998-05-17; AMT6/1998-05-21; AMT6/1998-05-22; AMT6/1998-05-23; AMT6/1998-05-24; AMT6/1998-05-25; AMT6/1998-05-27; AMT6/1998-05-28; AMT6/1998-05-29; AMT6/1998-05-30; AMT6/1998-05-31; AMT6/1998-06-01; AMT6/1998-06-02; AMT6/1998-06-03; AMT6/1998-06-04; AMT6/1998-06-05; AMT6/1998-06-06; AMT6/1998-06-07; AMT6/1998-06-08; AMT6/1998-06-09; AMT7/1998-09-15; AMT7/1998-09-16; AMT7/1998-09-17; AMT7/1998-09-22; AMT7/1998-09-23; AMT7/1998-09-25; AMT7/1998-09-26; AMT7/1998-09-27; AMT7/1998-09-28; AMT7/1998-09-29; AMT7/1998-10-01; AMT7/1998-10-02; AMT7/1998-10-03; AMT7/1998-10-04; AMT7/1998-10-05; AMT7/1998-10-06; AMT7/1998-10-07; AMT7/1998-10-08; AMT7/1998-10-09; AMT7/1998-10-10; AMT7/1998-10-11; AMT7/1998-10-12; AMT7/1998-10-13; AMT7/1998-10-14; AMT7/1998-10-15; AMT7/1998-10-16; AMT8/1999-05-05; AMT8/1999-05-06; AMT8/1999-05-07; AMT8/1999-05-08; AMT8/1999-05-09; AMT8/1999-05-10; AMT8/1999-05-12; AMT8/1999-05-13; AMT8/1999-05-18; AMT8/1999-05-19; AMT8/1999-05-20; AMT8/1999-05-21; AMT8/1999-05-22; AMT8/1999-05-23; AMT8/1999-05-24; AMT8/1999-05-25; AMT8/1999-05-26; AMT8/1999-05-27; AMT8/1999-05-28; AMT8/1999-05-29; AMT8/1999-05-30; AMT8/1999-05-31; AMT8/1999-06-01a; AMT8/1999-06-01b; AMT8/1999-06-02; AMT8/1999-06-03; AMT8/1999-06-04; Atlantic; Calculated after Luo et al. (2012); Date/Time of event; DEPTH, water; Diazotrophs, total biomass as carbon; Event label; Latitude of event; Light microscope; Longitude of event; MAREDAT_Diazotrophs_Collection; MULT; Multiple investigations; Sample comment; Trichodesmium, biomass as carbon; Trichodesmium, carbon per trichome; Trichodesmium abundance, colonies; Trichodesmium abundance, total
    Type: Dataset
    Format: text/tab-separated-values, 1342 data points
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    DATA PANGAEA
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