Occurrence patterns of the gametophyte of Thorea okadae (Rhodophyta) in the Yasumuro River, Kamigori, Hyogo Prefecture, Japan, with special reference to variations in river-water discharge

• SATO Hiroshi

  Institute of Natural and Environmental Sciences, University of Hyogo

• YOKOYAMA Tadashi

  Nishi-Harima School for the Mentally Handicapped

• MADONO Katsumaro

  Himeji High School of Toyo University

• TSUJI Mitsuhiro

  Foundation for Riverfront Improvement and Restoration

• MIZUNO Masamitsu

  Foundation for Riverfront Improvement and Restoration

• UODOME Takashi

  Yachiyo Engineering Co., Ltd.

• SENOO Yoshiyuki

  Yachiyo Engineering Co., Ltd.

• SUGINO Nobuyoshi

  The General Environmental Technos Co., Ltd.

• NAGANO Masayuki

  The General Environmental Technos Co., Ltd.

• MITSUHASHI Hiromune

  Museum of Nature and Human Activities

• ASAMI Kayo

  Institute of Natural and Environmental Sciences, University of Hyogo

• MICHIOKU Kohji

  Faculty of Engineering, Kobe University

• HARADA Hifumi

  Hyogo Prefectural Nishiharima Administration Office

Bibliographic Information

Other Title

• 兵庫県上郡町・安室川における淡水産紅藻チスジノリ配偶体の出現―特に河川の流量変化との関係について―
• 兵庫県上郡町・安室川における淡水産紅藻チスジノリ配偶体の出現--特に河川の流量変化とその関係について
• ヒョウゴケン カミゴオリチョウ ヤスムロガワ ニ オケル タンスイサン コウソウ チスジノリ ハイグウタイ ノ シュツゲン トクニ カセン ノ リュウリョウ ヘンカ ト ソノ カンケイ ニ ツイテ
• ―特に河川の流量変化との関係について―

Abstract

Thorea okadae, a freshwater red alga (Rhodophyta), was found in the Yasumuro River, Kamigori, Hyogo Prefecture, on January, 2004. Although this species was initially found in 1991, it had not been encountered in this river from 1995 to 2003. It occurred attached to submerged substrata at water depths ranging from 20 to 100 cm and at a surface water velocity ranging from 14 to 84 cm s^-1. Occurrence patterns were investigated for this species with special reference to variations in water discharge. It is suggested that the flood discharge exhibiting its greatest daily mean value in July and/or August (summer) along with the subsequent low discharge during the growth period (autumn) may result in abundant gametophytes of T. okadae occurring from autumn to the following spring. The sporophyte (Chantransia stage) of T. okadae was also found attached to submerged stones at the lower part of the study area.

Journal

• Japanese Journal of Limnology (Rikusuigaku Zasshi)

  Japanese Journal of Limnology (Rikusuigaku Zasshi) 67 (2), 127-133, 2006

  The Japanese Society of Limnology

Keywords

• flood discharge
• freshwater red alga
• gametophyte
• <i>Thorea okadae</i>
• Yasumuro River

Details

• CRID: 1390001204058314624
• NII Article ID: 10018065071
• NII Book ID: AN0024866X
• DOI: 10.3739/rikusui.67.127
• ISSN: 18824897
• ISSN: 00215104
• NDL BIB ID: 8092165
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8092165
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed