Major role of ultraviolet-B in controlling bacterioplankton growth in the surface layer of the ocean

Article Abstract:

New evidence shows that ultraviolet-B (UV-B) solar radiation suppresses the activity of bacterioplankton in the surface layer of the ocean at greater depths and to a greater degree than previously believed. UV-B also degrades macromolecules photochemically into biologically labile organic compounds. Since bacterioplankton account for the uptake of much labile organic matter, increased UV-B concentration may result in the increased concentration of labile organic matter in the surface layer of the oceans.

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Synchronization and rhythmic processes in physiology

Article Abstract:

Issues are presented concerning the complex physiological rhythms which occur in living organisms. The effect of disease on these physiological rhythms and their interaction with one another are discussed.

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An unbearable beating by light?

Article Abstract:

The effect of exposure to ultraviolet radiation can cause a variety of morphological and physiological responses in plants. The effect of ultraviolet light on the DNA of plants is discussed.

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