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FUNCTIONAL ROLE OF BASIC COMPONENTS OF ANTARCTIC PLANKTON UNDER ITS PRESENT-DAY TRANSFORMATION
FUNCTIONAL ROLE OF BASIC COMPONENTS OF ANTARCTIC PLANKTON UNDER ITS PRESENT-DAY TRANSFORMATION
Description On the basis of complex experimental and field observations in the Atlantic sector of Antarctic Region the features of transformation of trophic structure in a plankton at different scenarios related to a different abundance of krill and salps and different degree of maturity of planktonic community in the whole are considered. Among heterotrophs in all considered situations the dominant functional role belonged to krill, salps and bacterioplankton. Relationship between the food requirements of the first and the seconds depending on their abundance varied on the order in one or another side. Thus intensive introduction of salps in the basis of natural habitat of krill not always was accompanied by the origin of deficit of food for them. This circumstance connected to intensity of meridional transfer of waters, probably, is an original damper for negative transformation at least in present-day conditions . At the same time there are the reasons to suppose that, judging by the observed signs, a possible disastrous consequences for the Antarctic ecosystem will be integrated with two major factors mechanical exportation from the basis of natural habitat of krill both mezozooplankton and inhibition of development of their populations through the food competition created by gelatinous organisms. Author E.Z. Samyshev ·  JPG file - 2.33 MB - 2 384 x 3 370 pixelsmore
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added on 2008-08-10783 views Creative Commons License This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License
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