Dynamics of Copepod Faecal Pellets in Relation to a Phaeocystis Dominated Phytoplankton Bloom: Characteristics, Production and Flux
Dynamics of Copepod Faecal Pellets in Relation to a Phaeocystis Dominated Phytoplankton Bloom: Characteristics, Production and Flux
复制标题
DOI：
10.1093/plankt/23.1.75
复制
发表时间：
2001
影响因子：
2.1
通讯作者：
C. Frangoulis;Sami Belkhiria;A. Goffart;J. Hecq
中科院分区：
文献类型：
--
作者：
C. Frangoulis;Sami Belkhiria;A. Goffart;J. Hecq
在1995年、1996年和1997年的春季，在北海南湾测量了桡足类粪便颗粒的特征和产量，以确定由于浮游植物华的发展而发生的变化。这些变化与从硅藻到Phaeocystis sp.的演替有关。在褐囊藻华发展期间，平均每月颗粒产量下降至0.27粒/ h - 1，比华前和华后低约80%。虽然浮游植物色素在近海和近海站点之间存在显著差异，但在粪便颗粒生产方面没有显著差异。在以硅藻为主的水华向以辉囊藻为主的水华过渡期间，粪球沉降率从100米下降到70米。这是由于颗粒密度的减少和/或颗粒体积的减少。这些结果支持了褐囊藻华条件下桡足类动物摄食减少的观点。由于桡足类粪便颗粒的平均季节性密度（1.37 g cm‐3）高于其他海域，因此意外摄入沉积物质
1TO WHOM CORRESPONDENCE SHOULD BE ADDRESSED Copepod faecal pellet characteristics and production were measured in spring 1995, 1996 and 1997 in the North Sea Southern Bight in order to define changes due to the development of the phytoplankton bloom. Changes were related to the succession from diatoms to a Phaeocystis sp. bloom. Mean monthly pellet production decreased during the Phaeocystis bloom development to 0.27 pellets ind.‐1 h‐1, approximately 80% lower than before and after the bloom. Although phytoplanktonic pigments showed significant differences between inshore and offshore stations, there was no such significant difference for faecal pellet production. Faecal pellet sinking-rate decreased from 100 to 70 m day‐1 during the transition from a diatom- to a Phaeocystis-dominated bloom. This was due to a decrease in pellet density and/or a decrease of the pellet volume. These results supported the idea of lower feeding of copepods under Phaeocystis bloom conditions. As mean seasonal density of copepod faecal pellets was higher (1.37 g cm‐3) than in other seas, accidental ingestion of sedimentary material