Biological and Physical Mechanisms Controlling the Fine-Scale Epizooplankton Distributions
Biological and Physical Mechanisms Controlling the Fine-Scale Epizooplankton Distributions

Author: Peter B. Ortner

Publisher:

Published: 1987

Total Pages: 4

ISBN-13:

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This letter represents our Final Report the contract on Biological and Physical Mechanisms Controlling the Fine-Scale Epizooplankton Distributions which ended September 1987. We have made and continue to make significant progress towards our goal to provide biological oceanographers with the ability of obtaining fine-scale zooplankton distributional data and physical (environmental) samples on the same or similar time and space scales. The In Situ Plankton Camera and its complementary electronics package has proven to be a rugged and reliable tool to determine the fine-scale distribution of macrozooplankton relative to their physical environment. We have demonstrated the utility of the Acoustic Doppler Current Profiler (ADCP) to interpreting the distribution of planktonic organisms.

Controls Upon the Fine-Scale Distribution of Epizooplankton
Controls Upon the Fine-Scale Distribution of Epizooplankton

Author:

Publisher:

Published: 1989

Total Pages: 4

ISBN-13:

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Our general objective in this report has been to understand: (1) the biological and physical mechanisms controlling the fine-scale (1-10m) distribution of epizooplankton, (2) the ecological significance of these distributions, and (3) the affect of these distributions upon the fate of particles (phytoplankton) within the upper water column. More specifically our research has been directed at answering the following questions: (1) Do physical gradients influence zooplankton distributions directly or indirectly? (2) Is the vertical distribution of zooplankton controlled by density gradients or loci of current shear situated within steep density gradients? (3) How strong a physical gradient must exist and how long must it persist to influence the zooplankton distribution?

Ecology of Marine Ports of the Black and Azov Sea Basin
Ecology of Marine Ports of the Black and Azov Sea Basin

Author: A. K. Vinogradov

Publisher: Springer

Published: 2017-08-18

Total Pages: 420

ISBN-13: 3319630628

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This work examines the waters of marine ports as unique integrated aquatic ecosystems. It regards marine ports as entities comprising components of natural and anthropogenic origin, including pelagic, periphytal and benthal subsystems. Using selected Black and Azov Sea ports as examples, the book discusses the hydrodynamics and water exchange, which are weakened in ports compared with open coastal zones. It reflects consequences of the presence of hydrobionts and the accumulation of organic matter, which are promoted by the variety of hard substrata and the absence of fishery. The book is divided into five main chapters. The first chapter describes the general characteristics of the marine ports at the northern coast of the Black and Azov Seas and their shipping channels. Chapters 2 to 4 discuss the main abiotic and biotic peculiarities of the pelagial, periphytal and benthal subsystems of those marine ports, and chapter 5 deals with tropho-dynamic processes in their ecosystems. A concluding section reflects recommendations how the ecosystems of ports in non-tidal seas may be ameliorated.