淡水浮游动物对营养状况不同的单个藻类细胞的辨别。

Discrimination by freshwater zooplankton between single algal cells differing in nutritional status.

作者信息

Butler Nancy M, Suttle Curtis A, Neill William E

机构信息

Ecology Group-Department of Zoology, University of British Columbia, V6T 2A9, Vancouver, B.C., Canada.

Departments of Botany and Oceanography, University of British Columbia, V6T 2A9, Vancouver, B.C., Canada.

出版信息

Oecologia. 1989 Mar;78(3):368-372. doi: 10.1007/BF00379111.

DOI:10.1007/BF00379111

PMID:28312583

Abstract

Grazing rates of a freshwater copepod (Diaptomus kenai) and a freshwater cladoceran (Daphnia rosea) on the green alga Selenastrum minutum were determined to be dependent on the nutritional status of individual cells. Cells that were less nitrogen limited were ingested at a greater rate than cells reared under more nitrogen limited conditions. Diaptomus displayed active discrimination, possibly via chemodetection, while Daphnia expressed passive selection, probably via differential retention on filters. These results suggest that the impact of grazing zooplankton varies with the physiological state of components of the phytoplankton community.

摘要

已确定一种淡水桡足类动物（肯奈哲水蚤）和一种淡水枝角类动物（粉红水蚤）对绿藻微小色球藻的摄食率取决于单个细胞的营养状况。氮限制较少的细胞比在氮限制较多条件下培养的细胞被摄食的速率更高。哲水蚤表现出主动辨别能力，可能是通过化学探测，而水蚤则表现出被动选择，可能是通过在滤器上的不同滞留情况。这些结果表明，浮游动物摄食的影响随浮游植物群落组成部分的生理状态而变化。