Phytoplankton death in the sea
Article Abstract:
Marine phytoplankton may just die and lyse, without being touched by a grazer, according to a new study by Agusti and colleagues. They estimated lysis rates of natural phytoplankton assemblages, using a method first proposed by van Boekel and colleagues. They found extremely high rates of lysis in surface waters in the northwestern Mediterranean Sea, equivalent to 50% of phytoplankton growth, clearly showing that cell lysis can be substantial particularly if grazing and sinking rates are low.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Interrelated influence of iron, light and cell size on marine phytoplankton growth
Article Abstract:
Marine research shows that net algal production depends upon cellular iron, light and cell surface area. Photosynthetic iron-based redox proteins uptake depends directly on light intensity. Phytoplankton growth is less in ocean regions which are lacking in iron-based redox proteins like the euphotic zone of the Antarctic Ocean. Growth patterns in organisms including the coastal diatoms Thalassiosira pseudonana and Thalassiosira weissflogii are established.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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