The diel vertical migration of zooplankton observed by an acoustic Doppler current profiler and particle size analyzer in the East China Sea

Xu Yajun; Zhao Liang; Yuan Ye

doi:10.3969/j.issn.0253-4193.2016.08.013

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Xu Yajun, Zhao Liang, Yuan Ye. The diel vertical migration of zooplankton observed by an acoustic Doppler current profiler and particle size analyzer in the East China Sea[J]. Haiyang Xuebao, 2016, 38(8): 124-131. doi: 10.3969/j.issn.0253-4193.2016.08.013

Citation:

Xu Yajun, Zhao Liang, Yuan Ye. The diel vertical migration of zooplankton observed by an acoustic Doppler current profiler and particle size analyzer in the East China Sea[J]. Haiyang Xuebao, 2016, 38(8): 124-131. doi: 10.3969/j.issn.0253-4193.2016.08.013

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The diel vertical migration of zooplankton observed by an acoustic Doppler current profiler and particle size analyzer in the East China Sea

doi: 10.3969/j.issn.0253-4193.2016.08.013

1.
College of Marine and Environmental Science, Tianjin University of Science and Technology, Tianjin 300457, China
2.
National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China

Received Date: 2015-12-22
Rev Recd Date: 2016-02-04

Abstract

Abstract

The diel migration of zooplankton is closely related to the population fluctuation and feeding rhythm, and the study on the diel migration of zooplankton has become an important part of their community dynamics. In the present study, the diel vertical migration of zooplankton was studied by acoustic Doppler current profiler (ADCP) and laser particle analyzer (LISST-100) over 24 h off the coast of Zhejiang Province in summer 2013. The time series of backscatter coefficient (S_v) calculated by ADCP echo intensity and particle size spectrum from LISST-100 are used to study the vertical migration of zooplankton and its characteristics. Euchaeta concinna showed a remarkable diurnal vertical migration with a mean vertical speed is about 0.05 m/s. It feed in the thermocline at night, and hide in the bottom Taiwan warm water at daytime. It can be found from particle size spectrum that the large particle aggregate, meanwhile particles with size of 100-150 μm decrease in the thermocline at the night. The particle size of suspended particles has obvious diel rhythms in the water column, which indicate that there should be diurnal variation of biological community structure in different water level.
- vertical migration,
- zooplankton,
- LISST-100,
- ADCP,
- the East China Sea

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References(24)

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