The <i>Phyllospadix iwatensis</i> community in the intertidal zone of the Far Eastern seas of Russia

Abstract

The community of Phyllospadix iwatensis is studied using materials from expeditions of A.V. Zhirmunsky Institute of Marine Biology (National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences) and archive data (1949-2013) of the Laboratory of Chorology covering the species habitat area from Peter the Great Bay in the south to middle Kuril Islands in the north. The core of the community is identified. It has changing species composition; the changes correspond to geographical boundaries of the cenotic systems of Peter the Great Bay, the Lesser Kuril Islands, and Iturup Island. However, these boundaries do not coincide with the boundaries of the species-edificator habitat that embraces several cenotic systems. Spatial alterations of the cenotic systems are caused by landscape changes conditioned by general geomorphological situation and ecological conditions in the intertidal zone.

Marine macroinvertebrate fauna of the shallow coastal waters of the Shiretoko Peninsula, a World Natural Heritage at Hokkaido, Japan

“…Therefore, while the Shiretoko Peninsula is affected by cold currents, such as the Oyashio Current and the East Sakhalin Current, the occurrence of temperate species suggests that the Soya Warm Current affects the area, and changes in the proportion of cold or cool and temperate elements would provide useful information for assessing the influence of warm currents. Ivanova & Tsurpalo (2012) described the intertidal biota of the Russian Far East and showed a trend of increasing species richness from the Kamchatka Peninsula to the Kurile Islands and a latitudinal gradient of species richness in the intertidal biota of the Sea of Okhotsk. If this trend is related to the species diversity of larvae dispersed by cold and warm currents, the ocean currents reaching the coast of the Shiretoko Peninsula may produce differences in species depending on location.…”

“…Russian research institutes have been engaged in various oceanographic studies on the Sea of Okhotsk and its surrounding waters, and many of these have focused on intertidal organisms. Thus, the general features of the intertidal biota in the Russian territory have been reported (e.g., Kussakin 1975, Kafanov et al 2004, Ivanova & Tsurpalo 2012, Yamazaki et al 2015. However, in Japan, at the southernmost coastline of the Sea of Okhotsk, there are reports on molluscan fauna by Yamazaki (2011) and Nobetsu & Yamazaki (2011, and fish fauna by Nobetsu et al (1998) and Shinohara et al (2012), but our understanding of the entire species composition is still far from satisfactory.…”

Seagrasses At The Islands Iturup And Urup Of Kuril Archipelago

“…The relatively northern waters including the Kuril Islands remain especially understudied. The specimens from the Kuril Islands were mentioned in Russian sources, but without details; most of the studies in this field were carried out in the 1960s (Kusakin et al 1974;Ivanova and Tsurpalo 2017). Moreover, some data on the seagrasses of southern Kuril Islands were obtained in 1990-2000 in process of studies of algae (Evseeva 2007).…”