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AUTHOR(S): 

Igor V. Volvenko

 

TITLE

Comparison of the Far Eastern seas and the North Pacific Ocean in terms of species diversity, its components, and other integral characteristics of net zooplankton in the epipelagial zone

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ABSTRACT

As a result of large-scale plankton surveys carried out by TINRO using the Juday net with a 0.1 m2 opening in 1984-2013, comparisons can be made on the Chukchi and Bering seas, the Sea of Okhotsk, the Japan/East Sea and the adjacent Pacific Ocean in terms of species diversity H (binary digits/specimen), species richness S (number of species), species evenness by number of individuals J (unit share), total population density in abundance units N (thousand specimen/m3) and biomass M (g/m3), and average individual weight of animal W (mg/specimen). The Pacific waters are first in terms of S, but lag behind in terms of N and J. W is higher than in the ocean only in the Bering Sea. H is lower than in the ocean only in the Chukchi Sea, and M is lower only in the Japan/East Sea. The Chukchi Sea is first in terms of plankton N and M, second in terms of J, third in terms of W, and last in terms of S and H. The Bering Sea is first in terms of W, second in terms of S, H and M, third in terms of N and last in terms of J. The Sea of Okhotsk is second in terms of W, last in terms of N and third in terms of all other indicators. The Japan/East Sea is first in terms of S, J, and H, second in terms of N, but last in terms of W and, as a consequence, in terms of M. It seems that when going from south to north plankton density and size increase, while its diversity and its components decrease. However, this trend has many exceptions: the latitudinal trend is broken by the Japan/East Sea in terms of N, the Sea of Okhotsk in terms of S and H, and the Chukchi Sea in terms of J and W.

KEYWORDS

comparison of water areas, Northern Pacific, East Arctic, zooplankton, abundance, species diversity, species richness, species evenness, size of animals

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Cite this paper

Igor V. Volvenko. (2017) Comparison of the Far Eastern seas and the North Pacific Ocean in terms of species diversity, its components, and other integral characteristics of net zooplankton in the epipelagial zone. International Journal of Environmental Science, 2, 343-346

 

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