珪藻群集の季節変動 : 北西太平洋におけるセジメント・トラップの結果(1986年8月∿1988年11月)

概要

論文の詳細を見る
Three sets of a time-series of thirteen consecutive 18 to 21 day-long samples, representing three sediment trapping intervals, August 1986-May 1987,June 1987-February 1988 and March-November 1988,were collected from the northwest Pacific(34°10.1'-34°11.3'N, 141°57.7'-141°59.53'E), and provided meterial to evaluate seasonal changes in both flux and species composition of diatoms. Five high flux periods corresponding to a spring or autumn phytoplankton bloom occurred in the time-series flux records for the three sediment trapping intervals. Four minor peaks in total diatoms were also recorded in the flux, which may be related to high diatom production associated with a large amount of nutrient-rich river supply to coastal waters during the rainy season, or with a local upwelling caused by northerly wind blowing from Siberia in winter. Temporal changes in the path of the Kuroshio, lateral and vertical water movements in the water column, and a corrosion-related decrease in relative abundances of weakly silicified forms were also discriminated as flux controlling factors. In 39 sediment trap cup samples, 136 diatom species or varieties belonging to 55 genera were identified. In the trapping intervals, a nearly uniform seasonal succession of dominant forms occurred, which may be partly due to the intermixture and/or dispersion of particulate materials during their sinking from the euphotic realm to the sediment trap deployed at deep water. High abundances of Nitzschia bicapitata-N. bifurcata complex, Thalassionema nitzschioides and Neodelphineis indica characterize all the trapped assemblages.
国立科学博物館の論文
1992-12-22

珪藻群集の季節変動 : 北西太平洋におけるセジメント・トラップの結果(1986年8月∿1988年11月)

スポンサーリンク

概要

著者

関連論文

スポンサーリンク