Detection of Alpine Moor Vegetation Change by Comparison of Orthonized Aerophotographs at Different Times

• YASUDA Masatsugu

  Marine Biosystems Research Center, Chiba University

• DAIMARU Hiromu

  Forestry and Forest Products Research Institute

• OKITSU Susumu

  Faculty of Horticulture, Chiba University

Bibliographic Information

Other Title

• オルソ化航空写真の年代間比較による山地湿原の植生変化の検出
• オルソカ コウクウ シャシン ノ ネンダイカン ヒカク ニ ヨル サンチ シツゲン ノ ショクセイ ヘンカ ノ ケンシュツ

Abstract

Recently, it has been reported that the vegetation on the moor of Mt. Hiragatake is changing. This moor is located on the boundary between Gunma and Niigata prefectures, central Japan. To clarify this change in vegetation, we compared aerophotographs of Hiragatake moor obtained at different times. The distortion in these aerophotographs was removed using correction software (orthonized). The moor area was calculated using GIS software based on the orthonized aerophotographs. The results reveal that the moor area was reduced by 10% over the period of 33 years from 1971 to 2004. Further, we investigated the part of the moor where the vegetation had changed markedly and found that patches of Pinus pumila had colonized the interior regions of the moor. Furthermore, we found Sasa kurilensis growing thickly on the moor edges. We examined the ecological characteristics and invasive forms of S. kurilensis and P. pumila. Our results clarify that P. pumila was the pioneering species invading the moor and it played the main ecological role in changing the vegetation of the moor. Moreover, S. kurilensis was the main plant with area changes in the moor. The change in vegetation is believe to have occurred due to the decrease in snowfall which is related to the origin and maintenance of the moor.

Journal

• Geographical Review of Japan

  Geographical Review of Japan 80 (13), 842-856, 2007

  The Association of Japanese Geographers

Keywords

• aerophotograph
• orthophotograph
• vegetation change
• alpine moor
• <i>Sasa</i> meadow
• reduced snowfall

Details

• CRID: 1390001205203572736
• NII Article ID: 10025830439
• NII Book ID: AA11591990
• DOI: 10.4157/grj.80.842
• ISSN: 21851727
• ISSN: 13479555
• NDL BIB ID: 9259284
• Web Site: http://id.ndl.go.jp/bib/9259284
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9259284
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed