Phenology and photosynthetic characteristics of a Japanese seagrass <i>Zostera marina</i> at the southern end of its distribution in the northwestern Pacific

• KAWANO TAKASHI

  Department of Fisheries, Faculty of Fisheries, Kagoshima University

• NISHIHARA GREGORY N.

  Institute for East China Sea Research, Graduate School of Fisheries Science and Environmental Studies, Nagasaki University

• TERADA RYUTA

  Department of Fisheries, Faculty of Fisheries, Kagoshima University

Bibliographic Information

Other Title

• 日本産アマモ <i>Zostera marina</i> の分布南限群落における季節的消長と光合成特性
• 日本産アマモZostera marinaの分布南限群落における季節的消長と光合成特性
• ニホンサン アマモ Zostera marina ノ ブンプ ナンゲン グンラク ニ オケル キセツテキ ショウチョウ ト コウゴウセイ トクセイ
• Phenology and photosynthetic characteristics of a Japanese seagrass Zostera marina at the southern end of its distribution in the northwestern Pacific

Abstract

  The phenology and photosynthetic characteristics of a Japanese seagrass Zostera marina were examined from April 2010 to September 2011 at Yamagawa, Ibusuki City, Kagoshima Prefecture, which is near the southern distributional limit in the northwestern Pacific. A line-transect survey conducted to elucidate its community structure showed that it is distributed at depths of 2-2.5 m. The biomass of this species showed a peak in May accompanying maturation; meanwhile, it disappeared from the substratum from August to October, suggesting that this population has an annual life history. Photosynthesis in this species was determined over a range of temperatures (12-32℃) by dissolved oxygen sensor, and revealed that the net photosynthetic rate was highest at 20℃. An ANOVA analysis indicated that there were no significant differences from 12℃ to 24℃. Pulse-amplitude modulated fluorometry was used to demonstrate that the relative electron transport rate (rETR) of photosystem II (water/plastoquinone oxido-reductase) increased quickly with increasing PAR, was highest at 611 μmol photons m⁻² s⁻¹, and decreased as PAR further increased. Summer seawater temperature was around 28-31℃ in the natural habitat of the community examined, suggesting that respiration and photosynthetic activity might be influenced by the natural conditions.<br>

Journal

• NIPPON SUISAN GAKKAISHI

  NIPPON SUISAN GAKKAISHI 78 (4), 692-704, 2012

  The Japanese Society of Fisheries Science

Keywords

• PAM

Details

• CRID: 1390001206416931968
• NII Article ID: 10030499438
• NII Book ID: AN00193422
• DOI: 10.2331/suisan.78.692
• ISSN: 1349998X
• ISSN: 00215392
• NDL BIB ID: 023898075
• Web Site: https://agriknowledge.affrc.go.jp/RN/2030833050
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I023898075
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed