New PDF release: Coastal Lagoon Eutrophication and ANaerobic Processes

By Susana Benlloch, Francisco Rodríguez-Valera, Silvia G. Acinas (auth.), Pierre Caumette, Jacques Castel, Rodney Herbert (eds.)

ISBN-10: 9400917449

ISBN-13: 9789400917446

ISBN-10: 9401072795

ISBN-13: 9789401072793

This multidisciplinary quantity comprehensively experiences our present wisdom of the consequences of city, commercial and agricultural pollutants at the biology of shallow coastal marine lagoons. the entire authors are across the world well-known experts and feature had a long time of expertise of their respective fields. the key power of this quantity is that it integrates a number of fields of study together with biogeochemistry, marine microbiology, marine algology and marine zoology. by way of adopting one of these method the reader is supplied with a transparent perception of the most important approaches inquisitive about lagoon eutrophication and dystrophy and their effect at the diverse organic groups which dwell in such environments. This ebook will hence supply a vital reference paintings for environmental biologists, ecologists, microbiologists and people eager about the administration and advertisement exploitation of those economically very important ecosystems.

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Additional info for Coastal Lagoon Eutrophication and ANaerobic Processes (C.L.E.AN.): Nitrogen and Sulfur Cycles and Population Dynamics in Coastal Lagoons A Research Programme of the Environment Programme of the EC (DG XII)

Sample text

The highest values at most sampling stations were found at the end of summer in 1993. In order to compare estimates of bacterial production in terms of thymidine incorporation and assimilation of organic compounds (glucose) those values were referred to the numbers of bacterial plate counts as the heterotrophic activities are related with: (i) bacterial numbers and (ii) distinct activity of different bacterial populations. We observed the highest values of assimilation of glucose in early summer 1993-1994 in all the Stations.

Prokaryotes belonging to the Bacteria domain are a minor component and only members of a closely related cluster of sequences were found, all relatives of the a-Proteobacteria (ca. 83% to Rhodopseudomonas marina). Halophilic Archaea were as expected the largest component of biomass in this environment. All the clones sequenced corresponded again to a highly homologous cluster (probably members of the same genus). However, all the sequences diverged considerably from the ones of the described genera of halophilic Archaea, in fact the data are consistent with the idea that the 16S rRNA genes directly amplified from the saltern correspond to members of an undescribed genus.

Station A showed the highest counts, followed by C 2 , Band C I , while the Prevost Lagoon stations showed lower numbers in the superficial sediment. This apparent discrepancy can be explained if we assume that while in Prevost Lagoon the larger (or a very significant) part of the primary productivity takes place in the water column due to the low light penetration in these eutrophic waters while in the more oligotrophic waters of Arcachon Bay most of the primary productivity takes place in the surficial sediment, richer in nutrients and directly exposed to sunlight at low tide.

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Coastal Lagoon Eutrophication and ANaerobic Processes (C.L.E.AN.): Nitrogen and Sulfur Cycles and Population Dynamics in Coastal Lagoons A Research Programme of the Environment Programme of the EC (DG XII) by Susana Benlloch, Francisco Rodríguez-Valera, Silvia G. Acinas (auth.), Pierre Caumette, Jacques Castel, Rodney Herbert (eds.)


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