2014年3月
Spatiotemporal dynamics of stable carbon isotope ratios in two sympatric oligohaline copepods in relation to the estuarine turbidity maximum (Chikugo River, Japan): implications for food sources
JOURNAL OF PLANKTON RESEARCH
- ,
- ,
- ,
- 巻
- 36
- 号
- 2
- 開始ページ
- 461
- 終了ページ
- 474
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1093/plankt/fbt094
- 出版者・発行元
- OXFORD UNIV PRESS
To improve our understanding of high copepod productivity in the estuarine turbidity maximum (ETM) of the macrotidal Chikugo River estuary in southwestern Japan, we determined stable carbon isotope ratios (delta C-13) in the sympatric oligohaline copepods Sinocalanus sinensis and Pseudodiaptomus inopinus from 2005 to 2006. Terrestrial-plant and phytoplankton detritus always accumulated in the ETM (salinity 0.1-3), whereas outside the ETM phytoplankton dominated especially in the warm season (> 20 degrees C). In contrast to the year-round concentration of S. sinensis in the ETM, P. inopinus occurred widely along the upper estuary under phytoplanktondominated conditions. Terrestrial-plant detritus was characterized by relatively constant delta C-13 (similar to -24 parts per thousand), suggesting that significant spatiotemporal variability in copepod delta C-13 was attributable to the feeding of copepods on phytoplankton and/or its detritus. Both copepods had relatively depleted delta C-13 values in the ETM,
- リンク情報
- ID情報
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- DOI : 10.1093/plankt/fbt094
- ISSN : 0142-7873
- eISSN : 1464-3774
- Web of Science ID : WOS:000336489800014