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why does the spring phytoplankton bloom start

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Phytoplankton are common in the North Atlantic in spring and summer; they are also becoming more common around the Arctic Ocean and other far northern seas. stock) that typically occurs in the early spring and lasts until late spring or early summer. Phytoplankton growth is often limited by the scarcity of iron in the ocean. In lower-latitude areas, including the Arabian Sea and the waters around Indonesia, seasonal blooms are often linked to … Phytoplankton blooms occur when growth exceeds losses, however … The spring season tends to result in large blooms as the spring sun warms the top level of the water, creating a warm layer above the colder deeper water drawing the phytoplankton to the surface. This seasonal event is characteristic of temperate North Atlantic, sub-polar, and coastal waters. Introduction. We present a view of the spring bloom and the annual phytoplankton cycle that recognizes … This ocean “greening,” which can be seen from space, mirrors the springtime thaw on land. Similarly, blooms start about a month earlier in protected bays and fjords than in the … The reason the blooms occur in the spring is due to the sun warming the water, this creates a layer of warm water on the surface with cold water … Each spring, huge patches of phytoplankton bloom in the oceans, turning cold, blue waters into teeming green pools of microbial life. That allows the phytoplankton to begin to build up in midwinter, a head start in growth that is a prelude to the massive bloom once the winter's storms cease mixing and conditions for growth improve. As a result, many people are discussing plans to fertilize large areas of the ocean with iron to promote phytoplankton blooms that would transfer more carbon from the atmosphere to the deep sea. Most of the time the highest bloom is the spring bloom so between March and May.What causes these blooms of phytoplankton is the supply of light and nutrients. Whereas the autumn bloom is generally triggered by a mixing of the deeper waters, that are rich in nutrients, … There are phytoplankton blooms during spring because the increasing temperature causes ice and snow to melt, creating a surface layer of … The spring phytoplankton bloom is a ubiquitous phenomenon in temperate to boreal aquatic ecosystems, and the timing and magnitude of the spring bloom triggers much of the dynamics in these ecosystems throughout the year (Platt et al., 2003; Edwards and Richardson, 2004).Consequently, it has been a major … Phytoplankton use up the nutrients available, and growth falls off until winter storms kick-start mixing. The lack of an observable spring phytoplankton bloom is probably due to the presence of very efficient grazers that eat the phytoplankton as quickly as the latter can grow and divide, even during the optimal conditions in the spring. The initiation of a phytoplankton bloom during spring is typically explained by the critical depth theory, which is a simple model of the necessary conditions for a bloom (Sverdrup 1953). In our opinion, these attempts do not fully take into account both the biological and physical drivers of phytoplankton blooms, and importantly do not put the spring bloom into context of the annual cycles of phytoplankton dynamics. But it is not often that one species blooms so much for so long because any given species needs just the right balance of sunlight, nutrients, water temperatures, … The spring bloom is a strong increase in phytoplankton abundance (i.e. Phytoplankton start growing already in winter, long before the spring bloom at the ice edge. Phytoplankton are critical to other ocean …

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