TY - JOUR

T1 - Degradation of forest vegetation under island area variations in Holocene (the south of Lesser Kuril Ridge)

AU - Lyashchevskaya, Marina S.

AU - Grebennikova, Tatyana A.

AU - Razzhigaeva, Nadezhda G.

AU - Arslanov, Khikmatulla A.

AU - Maksimov, Fedor E.

AU - Starikova, Anna A.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Based on comprehensive study of a pit bog on the Rudnya Bay seaside (Zeleny Island) stages of landscape development were reconstructed for the south of Lesser Kuril Ridge when an extensive land bridge connecting South Kuril Is-lands with Hokkaido Island had existed there. Fragmentation of the land bridge was finally finished in the maximal phase of the Middle Holocene marine transgression. This led to isolation of island's flora and fauna. Features of the relief of Lesser Kuril Ridge and increase in oceanic climate troubled migration of species from neighbor territories. Woody vegetation degraded rather quickly. Meadow-marsh landscapes have become predominant. Other factors which affected subsequent development of biotic components are climaticfluctuations, tectonic setting which increased the level of groundwater, tsunami waves, strengthening the role of the cold Oyashio Current and the fall of the volcanic ash of Masu volcano. Changes in the landscapes of the Lesser Kuril Islands are in many respects similar to those on the Nemuro Peninsula (Eastern Hokkaido).

AB - Based on comprehensive study of a pit bog on the Rudnya Bay seaside (Zeleny Island) stages of landscape development were reconstructed for the south of Lesser Kuril Ridge when an extensive land bridge connecting South Kuril Is-lands with Hokkaido Island had existed there. Fragmentation of the land bridge was finally finished in the maximal phase of the Middle Holocene marine transgression. This led to isolation of island's flora and fauna. Features of the relief of Lesser Kuril Ridge and increase in oceanic climate troubled migration of species from neighbor territories. Woody vegetation degraded rather quickly. Meadow-marsh landscapes have become predominant. Other factors which affected subsequent development of biotic components are climaticfluctuations, tectonic setting which increased the level of groundwater, tsunami waves, strengthening the role of the cold Oyashio Current and the fall of the volcanic ash of Masu volcano. Changes in the landscapes of the Lesser Kuril Islands are in many respects similar to those on the Nemuro Peninsula (Eastern Hokkaido).

KW - Isolation of flora and fauna

KW - Land bridge

KW - Peat bog

KW - South Kuril Islands

KW - Spore-and-pollen and diatom analyses

KW - Tectonic setting

KW - Tsunami

UR - http://www.scopus.com/inward/record.url?scp=85044378800&partnerID=8YFLogxK

U2 - 10.7868/S2587556618010058

DO - 10.7868/S2587556618010058

M3 - Article

AN - SCOPUS:85044378800

SP - 52

EP - 62

JO - Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya

JF - Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya

SN - 0373-2444

IS - 1

ER -