Field conditions during grazing experiments in Kaneohe Bay, HI during 2012-2013 (EAGER: Copepod nauplii project) (NCEI Accession 0277297)

This dataset contains biological, meteorological, optical, and physical data collected at lab UHawaii_SOEST during deployment Goetze_2012-2013 in the North Pacific Ocean from 2013-05-27 to 2013-06-05. These data include chlorophyll a, irradiance, salinity calculated from CTD primary sensors, water temperature, wind_dir, and wind_speed_kts. The instruments used to collect these data include Anemometer, Flow Cytometer, Fluorometer, Photosynthetically Available Radiation Sensor, and Water Temperature Sensor. These data were collected by Dr Petra Lenz, Erica Goetze, and Karen E. Selph of University of Hawaii at Manoa as part of the "New molecular methods for studying copepod nauplii in the field (EAGER: Copepod nauplii)" project. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2023-01-23.

The following is the text of the dataset description provided by BCO-DMO:

Field conditions during grazing experiments

Dataset Description:
Acquisition Description:
Five combined bottle incubation and seawater dilution experiments were performed over a two-week period where the in-situ 2-35 µm total cell biomass ranged from 37 – 158 µg C L-1. Both Parvocalanus crassirostris and Bestiolina similis grazed a range of prey types and sizes, and shifted their selectivity of prey groups over the two-week period. In general, P. crassirostris grazed on a wider spectrum of prey than B. similis, which avoided the smallest potential prey (2-5 µm) across all dates. Both species had similar overall grazing rates as well as high daily carbon rations (at times >100%), and selected for the largest cells when they were more abundant. The trophic impact of each species was driven largely by in situ nauplius abundance, which was higher for P. crassirostris, from 0.8 to 8.9 nauplii L-1, than for B. similis, which ranged from 0.2 to 0.8 nauplii L-1. Our results suggest that the two species overlap in their potential prey, however, P. crassirostris appears to target a wider variety of prey, with B. similis preferring larger cells.