Hostname: page-component-6766d58669-76mfw Total loading time: 0 Render date: 2026-05-16T02:23:13.835Z Has data issue: false hasContentIssue false

Vegetation Changes around Haven Lake, Adak Island, Central Aleutians, Alaska, Determined from Pollen Analysis

Published online by Cambridge University Press:  19 November 2018

Makoto Noguchi
Affiliation:
Department of Applied Science, Graduate School of Science, Okayama University of Science, 1-1 Ridai-cho, Kita-ku, Okayama 700-0005, Japan
Toshiyuki Fujiki*
Affiliation:
Department of Applied Science, Faculty of Science, Okayama University of Science, 1-1 Ridai-cho, Kita-ku, Okayama 700-0005, Japan
Mitsuru Okuno
Affiliation:
Department of Earth System Science, Faculty of Science, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan
Lyn Gualtieri
Affiliation:
Civil and Environmental Engineering, Seattle University, 901 12th Avenue Seattle, WA 98122, USA
Virginia Hatfield
Affiliation:
Museum of the Aleutians, 314 Salmon Way, PO BOX 648, Unalaska, AK 99685USA
Brenn Sarata
Affiliation:
Fugro Engineers BV, Prismastraat 4, 2631 RT, 2630 AC, Nootdorp, The Netherlands
Masayuki Torii
Affiliation:
Disaster Mitigation Laboratory, Center for Water Cycle, Marine Environment and Disaster Management, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
Keiji Wada
Affiliation:
Hokkaido University of Education, 9 Kitamon-cho, Asahikawa, Hokkaido 070-8621, Japan
Toshio Nakamura
Affiliation:
Institute for Space-Earth Environmental Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
Dixie West
Affiliation:
Biodiversity Institute and Natural History Museum, The University of Kansas, 1345 Jayhawk Blvd. Lawrence, KS 66045, USA
*
*Corresponding author. Email: fujiki@das.ous.ac.jp.

Abstract

We collected peat sediments (sediment core ADK13083002) from Haven Lake on the north side of Adak Island (central Aleutian Islands, Alaska) to determine whether the vegetation has changed. We confirmed the presence of six tephra layers, including Forty Years (0.3 cal ka BP), T2, YBO (3.3 cal ka BP), Intermediate (6.4 cal ka BP), Main (9.5 cal ka BP), and T6. We identified four major pollen assemblage zones (HL-1 to HL-4, in descending order) in the cored sediment. HL-1 was dominated by Ranunculaceae and Empetrum pollen; H-2 was dominated by Poaceae, Ranunculaceae, and Empetrum pollen; HL-3 was dominated by Poaceae and Empetrum pollen; and HL-4 was dominated by Poaceae, Cyperaceae, Lycopodiaceae, and Empetrum pollen. Small charcoal particles, likely transported from a distance, were found at low frequencies until 6.4 cal ka BP. The total cross-sectional area of charcoal particles increased to 1500 μm2 or more by 6.4 cal ka BP, implying that the large charcoal particles originated from nearby Aleut settlements, which were established around the same time.

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable