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Coastal-Offshore Ecosystem Interactions

  • Kartonierter Einband
  • 384 Seiten
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stable isotope ratios act as naturally-occurring tracers for organic matter, making possible, under certain conditions, the quanti... Weiterlesen
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Beschreibung

stable isotope ratios act as naturally-occurring tracers for organic matter, making possible, under certain conditions, the quantification of coastal-offshore exchanges. In general, organic matter has isotope ratios characteristic of its origin (e. g. plants with different modes of photosynthesis and different growth conditions, anthropogenic compounds). These ratios are maintained as the organic matter moves through the biosphere and geosphere. A mixture of organic matter from two sources has isotope ratios intermediate between those of the two sources, in proportion to the fraction of material from each source. Isotope ratios are one of the few methods which can trace organic matter as it moves through natural ecosystems. Ratios can be measured on both the total organic matter and on particular chemical fractions or compounds. When used on organisms, isotope ratios provide information of organic matter actually assimilated into body tissues, not just material ingested. As with all tools, this method has certain limitations which must be borne in mind when interpreting its results. Firstly, specific environmental conditions must be met. This generally means an ecosystem with a limited and known number of sources of organic matter having different isotope ratios. Two sources with different isotope ratios are ideal; additional sources with other isotope ratios complicate interpretation. Secondly, the difference in isotope ratios of the two sources should be large compared with analytical variability. Thirdly, the ratios within each source should vary as little as possible.

Klappentext

This proceedings of a workshop held at the Tiburon Center for Environmental Studies, California, in April, 1986, combines the information on modeling, satellite imagery, experimental hydrodynamics and field observations, active migrations and larval transport, distribution and transformation of stable isotopes, ecosystem budgets, and sedimentology, all towards understanding movements and exchange of all kinds of matter between adjoining waters. The organizers of the meeting (SCOR Working Group 65) assessed the extent of knowledge regarding the interdependence of adjoining coastal and offshore waters, to see how they contribute to, and benefit from, each other's nutrient supply and biological productivity. A summary chapter discusses present gaps in our knowledge, concepts for future research, and major difficulties in quantifying the total mass of matter exchanged between adjoining bodies of water.



Inhalt

Contents: Water Exchange.- Mass Balance Studies.- Active Transport.- Numerical Modelling.- Coastal-Offshore Interactions.- Subject Index. List of Contributors: D.R. Cayan, J. Dronkers, C.E. Epifanio, J. Gearing, P. Gomez, S.W. Hager, C. Hopkinson, U. Horstmann, B.-O. Jansson, T. McClimans, A.D. McIntyre, S. Nixon, M.M. Pamatmat, T.H. Pearson, D. Peterson, H. Postma, P.C. Rothlisberg, L.E. Schemel, S.V. Smith, R. Twilley, R.J. Uncles, B. Zeitzschel, J.J. Zijlstra.

Produktinformationen

Titel: Coastal-Offshore Ecosystem Interactions
Untertitel: Proceedings of a Symposium sponsored by SCOR, UNESCO, San Francisco Society, California Sea Grant Program, and U.S. Dept. of Interior, Mineral Management Service held at San Francisco State University, Tiburon, California, April 7-22, 1986
Editor:
EAN: 9783540190516
ISBN: 3540190511
Format: Kartonierter Einband
Herausgeber: Springer Berlin Heidelberg
Anzahl Seiten: 384
Gewicht: 721g
Größe: H254mm x B178mm x T20mm
Jahr: 1988