Contents

Contemporary Problems of Ecology

Vol. 13, No. 2, 2020

Can the “Green Tides” Affect the Metal Distribution in the Coastal Sediments? A Case Study in the Eastern Gulf of Finland, Baltic Sea

Y. I. Gubelit, Y. M. Polyak, T. D. Shigaeva, L. G. Bakina and V. A. Kudryavtseva p. 113  abstract

European Smelt (Osmerus eperlanus (Linnaeus, 1758)) on Kolguyev Island, Barents Sea, and Factors Limiting Its Spread Through the Arctic

V. S. Artamonova, A. A. Makhrov, I. Yu. Popov and V. M. Spitsyn p. 127  abstract

Threespine Stickleback of the White Sea: Population Characteristics and Role in the Ecosystem

D. L. Lajus, P. V. Golovin, A. E. Zelenskaia, A. S. Demchuk, A. S. Dorgham, M. V. Ivanov, T. S. Ivanova, S. A. Murzina, N. V. Polyakova, E. V. Rybkina and A. O. Yurtseva p. 132  abstract

Restoration of Zoobenthic Communities and Water Quality in the River Ecosystem after a Decrease in the Level of Organic Pollution

S. M. Golubkov, E. V. Balushkina and M. S. Golubkov p. 146  abstract

Comparative Characteristics of the Fatty-Acid Composition of Lipids in Factory and Wild Juveniles of Atlantic Salmon Salmo salar L.

Z. A. Nefedova, S. A. Murzina, S. N. Pekkoeva, V. P. Voronin and N. N. Nemova p. 156  abstract

Factors of Spatial Distribution and Risk Assessment of Viviparus viviparus L. Invasion in Aquatic Ecosystems of the Ob River Basin

L. V. Yanygina, A. V. Kotovshchikov, L. M. Kipriyanova and D. D. Volgina p. 162  abstract

Features of the Far Eastern Gypsy Moth (Lymantria dispar L.) Population Outbreak

D. K. Kurenshchikov, V. V. Martemyanov and E. L. Imranova p. 172  abstract

Parasitic Community of Fleas (Siphonaptera) of Small and Medium Predators (Mammalia, Carnivora) of Southwestern Primorskii Krai

M. N. Litvinov, E. A. Litvinova, M. N. Erofeeva and S. V. Naidenko p. 180  abstract

Contributions of Resident Populations and Nonresident Activities of Small Mammals to the Results of Censuses Performed Using the Permanent Removal Method

A. A. Kalinin, I. F. Kupriyanova and D. Yu. Aleksandrov p. 184  abstract

Spatiotemporal Analysis of Wildfires in the Forest Tundra of Western Siberia

D. V. Moskovchenko, S. P. Aref’ev, M. D. Moskovchenko and A. A. Yurtaev p. 193  abstract