The nearshore benthic community of Kasatochi Island, one year after the 2008 volcanic eruption

Arctic, Antarctic, and Alpine Research
By: , and 

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Abstract

A description is presented of the nearshore benthic community of Kasatochi Island 10–12 months after a catastrophic volcanic eruption in 2008. The eruption extended the coastline of the island approximately 400 m offshore, mainly along the south, southeast, and southwest shores, to roughly the 20 m isobath. Existing canopy kelp of Eualaria (Alaria) fistulosa, as well as limited understory algal species and associated fauna (e.g., urchin barrens) on the hard substratum were apparently buried following the eruption. Samples and observations revealed the substrate around the island in 2009 was comprised almost entirely of medium and coarse sands with a depauperate benthic community, dominated by opportunistic pontogeneiid amphipods. Comparisons of habitat and biological communities with other nearby Aleutian Islands, as well as with the Icelandic volcanic island of Surtsey, confirm dramatic reductions in flora and fauna consistent with an early stage of recovery from a large-scale disturbance event.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title The nearshore benthic community of Kasatochi Island, one year after the 2008 volcanic eruption
Series title Arctic, Antarctic, and Alpine Research
DOI 10.1657/1938-4246-42.3.315
Volume 42
Issue 3
Year Published 2010
Language English
Publisher Institute of Arctic and Alpine Research (INSTAAR), University of Colorado
Contributing office(s) Alaska Science Center
Description 10 p.
First page 315
Last page 324
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