Diatom Species – Environment Relationships in Water Bodies of a Megalopolis (St. Petersburg City)

Ludikova A.V.

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The Influence of Prolonged Floodings on a Soil Cover of the Alazeya River Basin

Ivanova A.Z., Desyatkin R.V.

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Peculiarities of Agrafena Island Vegetation Cover (the Lower Lena)

Efimova A.P., Nikiforova E.N., Solomonov N.G.

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