Quantitative mapping of kelp forests (Laminaria spp.) before and after harvest in coastal waters of the Shiretoko Peninsula, Hokkaido, Japan
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- 作者：Kenji Minami (1)
Naoki Tojo (2)
Hiroki Yasuma (3)
Yusuke Ito (4)
Takahiro Nobetsu (5)
Shin-ichi Fukui (6)
Kazushi Miyashita (6) - 关键词：Distribution ; Echo surveys ; Geostatistical analysis ; Harvesting ; Kelps
- 刊名：Fisheries Science
- 出版年：2014
- 出版时间：May 2014
- 年：2014
- 卷：80
- 期：3
- 页码：405-413
- 全文大小：
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Naoki Tojo (2)
Hiroki Yasuma (3)
Yusuke Ito (4)
Takahiro Nobetsu (5)
Shin-ichi Fukui (6)
Kazushi Miyashita (6)
1. Faculty of Fisheries Science, Hokkaido University, Minato-cho 3-1-1, Hakodate, Hokkaido, 041-8611, Japan
2. Marino-Forum 21, Taito 4-8-7, Taito, Tokyo, 110-0016, Japan
3. Graduate School of Fisheries Science, Hokkaido University, Minato-cho 3-1-1, Hakodate, Hokkaido, 041-8611, Japan
4. Forestry and Fisheries Dependence, Hiroshima Agriculture, Motomachi 10-52, Naka-ku, Hiroshima, Hiroshima, 730-8511, Japan
5. Shiretoko Nature Foundation, Shiretoko National Park Nature Center, Iwaobetsu 531, Shari-cho, Hokkaido, 099-4356, Japan
6. Field Science Center for Northern Biosphere, Hokkaido University, Minato-cho 3-1-1, Hakodate, Hokkaido, 041-8611, Japan - ISSN：1444-2906
文摘
In the Shiretoko Peninsula, a World Natural Heritage site, the sustainable management of kelp forests has drawn public attention because of the economic and ecological importance of kelp. We spatially estimated the distributions of kelp forests in the Shiretoko Peninsula before and after harvest. Field surveys were conducted in coastal waters (23.74?km2) at the ends of July and August 2008, immediately before and after harvest. Data on the presence or absence and thickness of the kelp forests were collected via acoustic observation. The data were interpolated using geostatistical methods. Before harvest, the kelp forests were continuously distributed over 5.64?km2 (thickness 33-32?cm), especially near the north part of the study area. After harvest, they were sparsely distributed over 2.73?km2 (thickness 35-05?cm). In the southern part of the study area, the influence of harvests was observed as declines in forest area. In addition, relatively thickly forested areas formed the majority of the part most likely to be harvested. Selective harvesting for area and size was confirmed though quantitative mapping of kelp forests. The quantitative mapping of both the distribution and harvest of kelp forests was successful.