光学精密工程2018，Vol.26Issue(4)：764-770,7.DOI:10.3788/OPE.20182604.0764
浮游植物粒级结构的原位测量
In situ measurement of phytoplankton size class
摘要
Abstract
Size-fractionated filtration is a common approach for measuring phytoplankton size classes in marine observation.However,this approach is time-consuming and unsuitable for analysis of a large number of samples in profiling measurement.In this paper,an in situ measurement system w as devel-oped for retrieving the phytoplankton size classes using light absorption coefficient of seawater.The hardware system of this instrument consists of a light system,optical windows,sample cell,fiber op-tic cable,mini-spectrometers,and a data collection and control system.Based on the genetic algo-rithm,the measured absorption coefficients were transformed to phytoplankton size class.Experi-ments have been carried out in situ in the northern South China Sea.The results prove that the instru-ment can be used to measure and analyze phytoplankton size class in up to 300 m seawater depth with an vertical interval of 1 m.This system is especially suitable for analyzing the variability of phyto-plankton size class in 50 to 80 m seawater depth,which is commonly called the maximum chlorophyll depth in open ocean.The instrument could be used for ocean profiling measurement of phytoplankton size classes,which exhibits favorable future application prospects in marine observation.关键词
浮游植物粒级结构/原位测量/海水光吸收/光谱分析Key words
phytoplankton size class/in situ measurement/light absorption of seawater/spectral analysis分类
农业科技引用本文复制引用
曹文熙,孙兆华,李彩,周雯,许占堂..浮游植物粒级结构的原位测量[J].光学精密工程,2018,26(4):764-770,7.基金项目
中国科学院战略性先导专项A类(No.XDA11040302) （No.XDA11040302）
广州市科技计划资助项目(No.201504010034,No.201707020023) （No.201504010034,No.201707020023）
热带海洋环境国家重点实验室开放基金资助项目(No.LTOZZ1602) （No.LTOZZ1602）
