Event log from ARSV Laurence M. Gould LMG0602 in the Southern Ocean from February to March 2006 (SouthernSalps project)

Website: https://www.bco-dmo.org/dataset/2914
Version: 02 August 2012
Version Date: 2012-08-02

» Salpa Thompsoni in the Southern Ocean: Bioenergetics, Population Dynamics and Biogeochemical Impact (SouthernSalps)
Madin, Laurence P.Woods Hole Oceanographic Institution (WHOI)Chief Scientist

Dataset Description

Log of events from cruise LMG06-02. Sampling activities included: CTD casts to characterize the water column, salp sampling using bongo nets and MOCNESS tows, use of the Large Area Plankton Imaging System (LAPIS) to capture images of large plankton, and laboratory experiments.

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Data Files

(Comma Separated Values (.csv), 30.50 KB)
Primary data file for dataset ID 2914

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cruiseidCruise identifier, e.g. LMG0602 = ARSV Laurence M. Gould cruise number 0602. dimensionless
yearYear, e.g. 2006. YYYY
platformName of the ship. dimensionless
timezoneNumber of hours added to local time to convert to GMT (e.g. +4). hours
eventEvent or sampling operation number. dimensionless
instInstrument used to collect data. (Note: LAPIS = Large Area Plankton Imaging System) dimensionless
castCast number. dimensionless
stationConsecutive station number. integer
day_localDay of month, local time. dd
month_localMonth of year, local time. mm
time_localTime of day, local time, using 2400 clock format. HHMM
se_flagSampling operation start (s) or end (e) flag. text
latLatitude, negative = South. decimal degrees
lonLongitude, negative = West. decimal degrees
depth_wDepth of water. meters
depthDepth of sample. meters
siScientific investigator's name. text
regionGeographical area of sampling. text
day_gmtDay of month, gmt time. dd
month_gmtMonth of year, gmt time. mm
time_gmtTime of day, GMT. HHMM
commentsFree text comments about the event. free text
depth_mwoMean wire out. meters

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ARSV Laurence M. Gould
Start Date
End Date
The goal of the LMG06-02 cruise was to continue the studies begun in 2004 (LMG04-14) on the population biology, feeding, and energetics of Salpa thompsoni in the waters near the Antarctic Peninsula.

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Project Information

Salpa Thompsoni in the Southern Ocean: Bioenergetics, Population Dynamics and Biogeochemical Impact (SouthernSalps)

Coverage: Southern Ocean

This project is also referred to as "B-307:  Salpa thompsoni in the Southern Ocean". (B-307 was the USAP project/event number).

NSF Award Abstract:
Salps are planktonic grazers that have a life history, feeding biology and population dynamic strikingly different from krill, copepods or other crustacean zooplankton. Salps can occur in very dense population blooms that cover large areas and have been shown to have major impacts due to the their grazing and the production of fast-sinking fecal pellets. Although commonly acknowledged as a major component of the Southern Ocean zooplankton community, often comparable in biomass and distribution to krill, salps have received relatively little attention. Although extensive sampling has documented the seasonal abundance of salps in the Southern Ocean, there is a paucity of data on important rates that determine population growth and the role of this species in grazing and vertical flux of particulates. This proposed study will include: measurements of respiration and excretion rates for solitary and aggregate salps of all sizes; measurements of ingestion rates, including experiments to determine the size or concentration of particulates that can reduce ingestion; and determination of growth rates of solitaries and aggregates. In addition to the various rate measurements, this study will include quantitative surveys of salp horizontal and vertical distribution to determine their biomass and spatial distribution, and to allow a regional assessment of their effects. Measurements of the physical characteristics of the water column and the quantity and quality of particulate food available for the salps at each location will also be made. Satellite imagery and information on sea-ice cover will be used to test hypotheses about conditions that result in high densities of salps. Results will be used to construct a model of salp population dynamics, and both experimental and modeling results will be interpreted within the context of the physical and nutritional conditions to which the salps are exposed. This integrated approach will provide a good basis for understanding the growth dynamics of salp blooms in the Southern Ocean. Two graduate students will be trained on this project, and cruise and research experience will be provided for two undergraduate students. A portion of a website allowing students to be a virtual participant in the research will be created to strengthen students' quantitative skills. Both PI's will participate in teacher-researcher workshops, and collaboration with a regional aquarium will be developed in support of public education.

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Funding SourceAward
NSF Antarctic Sciences (NSF ANT)

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