Biogeochemistry of marine dissolved organic matter by Dennis A. Hansell, Craig A. Carlson

By Dennis A. Hansell, Craig A. Carlson

Marine dissolved natural topic (DOM) is a posh mix of molecules chanced on in the course of the worlds oceans. It performs a key function within the export, distribution, and sequestration of carbon within the oceanic water column, posited to be a resource of atmospheric weather rules. Biogeochemistry of Marine Dissolved natural subject, moment Edition, makes a speciality of the chemical parts of DOM and its biogeochemical, organic, and ecological importance within the international ocean, and offers a unmarried, certain resource for the references, info, and educated judgments of the group of marine biogeochemists.

Presented via a few of the worlds prime scientists, this revised version stories at the significant advances during this zone and comprises new chapters overlaying the function of DOM in historical ocean carbon cycles, the long run balance of marine DOM, the biophysical dynamics of DOM, fluvial DOM traits and destiny, and the Mediterranean Sea. Biogeochemistry of Marine Dissolved natural topic, moment Edition, is a very resource that is helping humans attracted to the biggest pool of energetic carbon on the earth (DOC) get an organization grounding at the common paradigms and plenty of of the appropriate references in this subject.

  • Features updated wisdom of DOM, together with 5 new chapters
  • The simply released paintings to synthesize contemporary examine on dissolved natural carbon within the Mediterranean Sea
  • Includes chapters that handle inputs from freshwater terrestrial DOM

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Extra info for Biogeochemistry of marine dissolved organic matter

Sample text

Bottom-up proteomics and amino acid d/l ratios both highlight the contribution of bacterial proteins to DOM. , 2003). In their proteomic data, Powell et al. (2005) reported short peptide sequences suggestive of r­ibulose-1,5-­bisphosphate carboxylate/ oxygenase (RuBisCo). RuBisCo is one of the most abundant proteins on Earth, and is essential in catalyzing carbon fixation in vascular plants, algae, photoautotrophic and chemoautotrophic bacteria. RuBiscCo is abundant in particulate matter located in the euphotic zone, where grazing, viral lysis, and other processes transfer some particulate RuBisCO into DOM.

How DOM is characterized, the extent to which the composition is known, therefore changes with the characteristics of interest. , 2009, 2012). ) that can be isolated from seawater. Viewed from this perspective, <10% of DOM has been characterized and it is fair to say that our knowledge of DOM has improved only marginally over the last decade and a half. However, it is often other features of composition, such as the distribution of major carbon, nitrogen, and phosphorus functional groups, the identity of major classes of compounds that contribute to labile and refractory fractions of DOM, or changes in the degree of oxidation, that are most informative to understanding the sources, sinks, and cycling of DOM.

RuBiscCo is abundant in particulate matter located in the euphotic zone, where grazing, viral lysis, and other processes transfer some particulate RuBisCO into DOM. Some of the DOM proteins visualized by electrophoresis and staining, particularly in the range of known RuBisCo subunit proteins of 55 and 13 kD, probably result from this cycling. Orellana and Hansell (2012) used a synthetic protein incorporating RuBisCo sequences to develop an immunoassay for anti-RbcL to measure RuBisCo concentrations in ~800 samples from the North Pacific Ocean.

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