Bioluminescence Measurements and Light Budget Analysis in the Vestfjord, Norway in the Fall 1989
NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB STENNIS SPACE CENTER MS
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Light budgets were constructed from biological collections and compared with bathyphotometric measurements of bioluminescence intensity made at five stations in Vestfjord, Norway, during October 1989. These comparisons suggested three different types of bioluminescence profiles. Types 1, 2, and 3 exhibited the lowest, intermediate, and greatest numbers of bioluminescent dinoflagellates and integrated water column bioluminescence dinoflagellates and a light budget dominated by Ceratium fusus to a depth of 15 m. Below 15 m, Protoperidinium curtipes and other Protoperidinium spp. contributed more than 50 of the light to a depth of 100 m. Type 2 station light budgets were also dominated by C. fusus to a depth of 15 m, but had a low-level zooplankton contribution from 5 to 100 m. Below 20 m, P. curtipes contributed more than 50 of the light. Type 3 stations were dominated by P. curtipes and other Protoperidinium spp. from 5 to 100 m. Zooplankton contribution was minimal within the upper 30 m of the profiles, increasing below 40 m. At 100 m, they produced approximately 40 of the light. The main zooplankton contributors were Conchoecia ostracods, Metridia Lucens copepods and nauplii.