Diel variation in high-frequency acoustic backscatter from Cochlodinium polykrikoides.
The integrated backscatter power (IBP) from Cochlodinium polykrikoides was measured every 15 min by a 5-MHz acoustic system during a 5-day cultivation with an irradiation cycle. IBP increased by 0.6 dB in 5 days, but varied by 0.83 dB during the irradiation cycle. The daily increase and diel variation in IBP were postulated to be affected by an increase in cell numbers and a diel variation in cell biovolume or density via photosynthesis, respectively. Cell division/separation might also affect a total variation in IBP. This study suggests that high-frequency acoustics may be a potential tool for investigating phytoplankton cell functions.
Department of Ocean System Engineering, Jeju National University, 102 Jejudaehakno, Jeju-si, Jeju Special Self-Governing Province, 690-756, Republic of Korea. bth012@jejunu.ac.kr
Tae-Hoon
TH
Bok
Jungyul
J
Na
Dong-Guk
DG
Paeng
D000162:Acoustics; D018533:Biomass; D002455:Cell Division; D004141:Dinoflagellida / Q000254:growth & development* / Q000378:metabolism / Q000528:radiation effects; D008954:Models, Biological; D009038:Motion; D010788:Photosynthesis; D011156:Population Density; D012542:Scattering, Radiation; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D013997:Time Factors; D014867:Water
D014867:Water