Breaching of a perennial snow dam below lake hyoga ike in the langhovde region of the soya coast, East Antarctica

Probable effect of disturbance events on the distribution and colonization of flora within/around the lake

Sakae Kudoh, Yukiko Tanabe, Takeshi Inoue, Satoshi Imura, Hiroshi Kanda

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2 Citations (Scopus)

Abstract

The distribution and colonization of flora in Antarctica may be limited by disturbance events, including flooding. Recently, we observed a large hole in the perennial snow dam below Lake Hyoga Ike (temporary name), located in the Langhovde region on the Soya Coast in East Antarctica. This phenomenon was also reported by a previous Japanese Antarctic Research Expedition, almost 25 years earlier. The earlier breakage was subsequently closed and the lake was refilled. At present, the surface area of the lake hasdecreased significantly due to the loss of water. Many of the neighboring valleys and lakes in the southern part of the Langhovde area contain well-developed colonies of algae, mosses, and lichens. By contrast, both Lake Hyoga Ike and the river below the snow dam contain very little flora. Such a contrast in the distribution and colonization of flora suggests that the repeated occurrence of physical disturbances, induced by breaching of the dam, may be a critical factor limiting flora in this ice-free region of Antarctica. We recommend long term observation of the fate of the ice cave and changes in the lake level for the purpose of evaluating climatic change and ecology. The observations also contribute to the maintenance of safety in the field works in this area.

Original languageEnglish
Pages (from-to)114-122
Number of pages9
JournalAntarctic Record
Volume53
Issue number1
Publication statusPublished - 2009 Mar

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dams (hydrology)
snow
Antarctica
flora
colonization
dam
disturbance
coasts
lakes
coast
lake
algae
ice
physical disturbance
lake level
breakage
lichen
moss
limiting factor
fieldwork

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Aquatic Science

Cite this

Breaching of a perennial snow dam below lake hyoga ike in the langhovde region of the soya coast, East Antarctica : Probable effect of disturbance events on the distribution and colonization of flora within/around the lake. / Kudoh, Sakae; Tanabe, Yukiko; Inoue, Takeshi; Imura, Satoshi; Kanda, Hiroshi.

In: Antarctic Record, Vol. 53, No. 1, 03.2009, p. 114-122.

Research output: Contribution to journalArticle

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