琉球列島喜界島の完新世サンゴ礁段丘における海面安定期と優占造礁サンゴについて
スポンサーリンク
概要
- 論文の詳細を見る
Coral reef terraces are one of the best recorders of biological response to environmental change events (e.g., sea-level changes). Kikai Island provides a rare opportunity to show biological and ecological frameworks (e.g., competition, coexistence, and succession) during a recent geological period. The island is fringed by raised Holocene raised reef terraces, which formed as a result of periodic tectonic uplifts. This study aims to characterize the spatial and temporal changes of corals at this island during the Holocene. The analysis is based on topographical and biological data obtained for the three sites (Shidooke, Kadon, and Nakugama reefs). Three raised reef terraces (Terrace II, III, and IV) grew from 7300 to 4500 years ago (during 2800 years), from 4500 to 2900 years ago (during 1600 years), and from 2900 to 1800 years ago (during 1100 years), respectively. Terrace II and III were uplifted 1-2 m around 4500 years ago and around 2900 years ago. Terrace IV was uplifted 1-2 m around 1800 years ago. The modern reef has been composed of corals for 1800 years. Sixteen coral genera and 53 species were recorded from the reef terraces. Terrace III and IV were dominated by four coral species (A. digitifera, A. robusta, G. retiformis, and F. stelligera), but Terrace II was predominantly composed of A. digitifera and A. robusta. These biological and ecological variations between the terraces represent a growth strategy responding to differences of reef growth time and/or insolation.
論文 | ランダム
- スケトウダラの初期生活史 (北海道周辺海域におけるスケトウダラ並びにタラ科魚類の資源・生態研究の現状と展望(北海道スケトウダラ研究グル-プ25周年記念論文集))
- 陸奥湾におけるスケトウダラ卵および仔稚魚の分布と移動
- ヘラクレトスにおけるヒュブリスについて
- 肝移植後の graft viability に対する donor の絶食の影響に関する実験的検討
- 20pPSB-25 鉄系超伝導体AFe_2As_2(A=Ba,Sr)系におけるFeサイトおよびAsサイトへの元素置換効果(20pPSB 領域8ポスターセッション(低温III(鉄系超伝導体)),領域8(強相関系:高温超伝導,強相関f電子系など))