The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite acquired this natural-color image on November 14, 2018. During a bloom, phytoplankton may increase its biomass by orders of magnitude within days. Phytoplankton competition during the spring bloom in four plankton functional type models T. Hashioka 1,2,3,5, M. Vo Abstract. Copepod population and biomass was monitored in Auke Bay, Alaska, during the spring bloom from 1987 to 1989. All three may have been at work near South Africa in the first half of November 2018. The abundance of C. finmarchicus reached up to 1000 individuals m –3 (Edvardsen et al., 2002). In May a small change in density, clearly illustrated by the profile of potential energy, was sufficient to support a spring bloom in the upper part of the water column. The plankton community structure was investigated on Sukkertop and Fylla Banks off West Greenland during the spring bloom in May 2000 and the post-bloom period in June 1999. Just as crocus and daffodil blossoms signal the start of a warmer season on land, a similar "greening" event--a massive bloom of microscopic plants, or phytoplankton--unfolds each spring in the North Atlantic Ocean from Bermuda to the Arctic. Under climate change, the Bering–Chukchi continental shelves have experienced drastic sea ice loss, breaking the minimum sea ice extent record in 2018… The arctic phytoplankton spring bloom, which is often diatom‐dominated, is a key event that provides the high latitude communities with a fundamental flux of organic carbon. We investigated the mechanisms of phytoplankton competition during the spring bloom, one of the most dramatic seasonal events in lower-trophic-level ecosystems, in four state-of-the-art plankton functional type (PFT) models: PISCES, NEMURO, PlankTOM5 and CCSM-BEC. Diatoms and Phaeocystis usually co-exist during the initial phase of the spring bloom, but the grazing activity on the two different phytoplankton groups is different. The measurements were taken in the spring bloom during which enhanced primary production led to a fast growth of C. finmarchicus, a herbivorous copepod. Major Spring Bloom Species. Large phytoplankton species such as diatoms are generally preyed upon by large grazers like copepods (Loebl and Van Beusekom, 2008). Phytoplankton population dynamics and the fate of production during the spring bloom in Auke Bay, Alaska 1 Edward A. Research article | 02 Nov 2013 . As phytoplankton do not remain at the surface in this mix, they do not have ready access to sunlight, so blooms do not occur in the winter. The community structure of a phytoplankton bloom depends on the geographic location of the bloom as well as its timing and duration. Research article 02 Nov 2013. Their grazing on phytoplankton biomass represented the first trophic level. Great phytoplankton blooms tend to occur at intersections: between land and sea, between different ocean currents, and between seasons. Laws University of Hawaii, Oceanography Department, and Hawaii Institute of Marine Biology 1000 Pope Road, Honolulu 96822
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