The response of photosynthetic absorption coefficients to irradiance in culture and in tidally mixed estuarine waters

Article Abstract:

Photosynthetic and photoprotective absorption coefficients together make up the phytoplankton absorption coefficient. Both coefficients vary as a function of irradiance. The photoprotective coefficient varies directly and the photosynthetic coefficient varies indirectly with irradiance. As irradiance decreases in cultures and in field samples from stratified portions of the water column, there is an increase in the ratio of the photosynthetic absorption coefficient to the total phytoplankton absorption coefficient.

Photosynthesis, Absorption of light, Light absorption

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Atmospheric inputs of dissolved organic nitrogen stimulate estuarine bacteria and phytoplankton

Article Abstract:

Atmospheric dissolved organic nitrogen from rainwater stimulates phytoplankton and estuarine bacteria. Atmospheric deposition is seen as potentially a large source of inorganic nutrients to many ecosystems. Laboratory experiments show that dissolved organic nitrogen (DON) from rainwater can stimulate productivity of the coastal marine organisms in question and can be important in ecosystems.

United States, Marine bacteria, Nitrogen (Chemical element), Nitrogen, Rain and rainfall, Rain

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Tidally oriented vertical migration and position maintenance of zooplankton in a temperate estuary

Article Abstract:

A study has been conducted in the low salinity zone of the northern San Francisco estuary to examine vertical migration and position maintenance of zooplankton. Topics discussed include mechanisms for abundance maxima of zooplankton species and tidal migration.

California, Statistical Data Included, Zooplankton, San Francisco Bay, Tides

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