Spring phytoplankton blooms in the absence of vertical water column stratification

Article Abstract:

The spring phytoplankton bloom in the temperate parts of the oceans can come before rather than only after the development of a thermocline or stable vertical water column. In fact, data from the Gulf of Maine show that the bloom can help to cause the water column to stratify. The commonly held view had been that water column stratification was essential for allowing the phytoplankton to obtain the degree of light and heat ideal for blooming, but the new research has shown that the phytoplankton can find the warming they need before the formation of a thermocline.

Marine productivity, Thermoclines (Oceanography), Thermocline

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The rise and fall of Rhizosolenia

Article Abstract:

Algal lifestyles have been studied to determine their roles in the global carbon cycle. Phytoplankton research has shown that these species gron on the ocean surface to receive sunshine, essential to the process of photosynthesis. Researchers have attributed this phenomenom to vertical nutrient transport whereby nitrate transport is driven by diffusion from below. Researchers have also shown that the high correlation between 15N and 14N in the mats indicate that Rhizosolenia move from the nutrient-rich levels to the surface water

Environmental aspects, Water, Nitrogen (Chemical element), Water chemistry, Photosynthesis, Marine algae

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Rapid and early export of Phaeocystis antarctica blooms in the Ross Sea, Antarctica

Article Abstract:

The colonial prymnesiophyte Phaeocystis antarctica may represent a significant link in the carbon, iron and sulphur cycles. Episodic sinking of colonial P. antarctica blooms may not need bloom senescence conditions. There is evidence for early and rapid carbon export from P. antarctica blooms to deep water and sediments in the Ross Sea, Antarctica.

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