Effects of turbation of the Japanese common lancelet Branchiostoma japonicum (Cephalochordata) on sediment condition: laboratory observation

DOI 機関リポジトリ Web Site 被引用文献2件 参考文献21件

書誌事項

タイトル別名
  • Effects of turbation of the Japanese common lancelet <i>Branchiostoma japonicum</i> (Cephalochordata) on sediment condition: laboratory observation

この論文をさがす

抄録

Behavior of the common lancelet Branchiostoma japonicum in sediment and effects of their turbation on sediment were observed in a tank to discover their ecological significance in a sandbank with a dense population of the animals. Direct observation using a video camera revealed that a lancelet frequently moves in the sediment only a short distance (a few centimeters at most) over the course of a day and rarely swims out from the sediment, and only for a few seconds. Sand ridges 4 cm high formed in the tank with lancelets at a density of 560 animals m-2 became almost level during an incubation period of 10 days, in contrast to a tank without lancelets, where there was no change. Dissolved O2 concentration in the interstitial water of the sediment with lancelets was 2-5 times higher than that without lancelets at the end of incubation for 7 or 12 days. These results indicate that bioturbation by a dense population of lancelets has significant effects on the physical and chemical conditions of the sediment.

収録刊行物

被引用文献 (2)*注記

もっと見る

参考文献 (21)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ