Chlorophyll data associated with salp swarm collections in the Slope Waters off northeastern USA from R/V Oceanus OC370, OC379, OC381 in the slope waters off NJ, DE, MD from 2001-2002 (SalpSwarmDyn project)

Website: https://www.bco-dmo.org/dataset/3150
Data Type: Cruise Results
Version: 1
Version Date: 2009-07-02

Project
» Salp Swarm Dynamics (SalpSwarmDyn)
ContributorsAffiliationRole
Madin, Laurence P.Woods Hole Oceanographic Institution (WHOI)Principal Investigator
Kremer, PatriciaUniversity of Connecticut (UConn)Co-Principal Investigator
Copley, NancyWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Abstract
Chlorophyll data associated with salp swarm collections in the Slope Waters off northeastern USA from R/V Oceanus OC370, OC379, OC381 in the slope waters off NJ, DE, MD from 2001-2002.


Coverage

Spatial Extent: N:40.60553 E:-67.994893 S:36.802395 W:-74.733377
Temporal Extent: 2001-09-15 - 2002-09-25

Dataset Description

Chlorophyll data associated with salp swarm collections in the Slope Waters off northeastern USA.

Associated datasets: salp_swarms


Methods & Sampling

Seawater was collected with Niskin bottles at several depths and filtered through both GFF filters and 2 ┬Ám pore glass fibre filters for analysis of Chlorophyll a and total phaeopigment. Immediately after water samples were filtered, filter pads were transferred into 6 ml of 90% acetone and the pigment was extracted in a dark refrigerator for 24 hours. Filter pads were removed and the test tubes centrifuged just prior to reading the fluorescence. Following the initial fluorescence reading, samples were acidified with ~0.2ml of HCl and reread. The fluorometer was calibrated using a spectrophotometer during each cruise using standard Chl-a derived from spinach. Chlorophyll-a and phaeopigments were calculated from standard equations (Strickland and Parsons 1972).


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Data Files

File
salp_chloro.csv
(Comma Separated Values (.csv), 18.69 KB)
MD5:ccf1d81a202f5cc97a47550bd98525f0
Primary data file for dataset ID 3150

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Parameters

ParameterDescriptionUnits
cruise_idcruise designation
yearyear, reported as YYYY
month_localmonth of year, local time
yrday_locallocal day and decimal time, as 326.5 for the 326th day of the year, or November 22 at 1200 hours (noon)
day_localday, local time
commentsfree text comments
samplesample identification or number
filtersize or type of filter: gff=glass fiber filter microns
chl_atotal chlorophyll-a pigment microgram/liter
phaeototal phaeopigment microgram/liter
pig_tottotal pigments microgram/liter
chl_per_totratio of chlorophyll to total pigments
depthsample depth meters


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Instruments

Dataset-specific Instrument Name
Niskin Bottle
Generic Instrument Name
Niskin bottle
Generic Instrument Description
A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.


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Deployments

OC370

Website
Platform
R/V Oceanus
Start Date
2001-09-14
End Date
2001-09-26
Description
Original cruise data are available from the NSF R2R data catalog

OC379

Website
Platform
R/V Oceanus
Start Date
2002-06-01
End Date
2002-06-14
Description
salp study Original cruise data are available from the NSF R2R data catalog

OC381

Website
Platform
R/V Oceanus
Start Date
2002-09-14
End Date
2002-09-27
Description
Original cruise data are available from the WHOI Data Library and Archives: http://dlacruisedata.whoi.edu/OC/OC381L01/ and from the NSF R2R data catalog: http://www.rvdata.us/catalog/OC381. The cruise was supported by NSF OCE award: OCE-0002540


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Project Information

Salp Swarm Dynamics (SalpSwarmDyn)

Coverage: slope water off mid-Atlantic Bight


Salps are holoplanktonic grazers that have a life history, feeding biology and population dynamic strikingly different from copepods or other crustacean zooplankton. They can occur in very dense populations that cover large areas, and these blooms have been shown to have major impacts due to grazing and production of fast?sinking fecal pellets. However the conditions supporting bloom formation, and the energetics, reproduction and behavior of the bloom?forming salps are still poorly understood. This study will focus on two species of salps that are global in their distribution and representative of two genera that commonly form large blooms. Salpa aspera regularly occurs during the summer in high concentrations in the slope waters of the Mid?Atlantic Bight, while Thalia democratica regularly forms dense populations during the winter spring in the Georgia Bight. The investigators will examine feeding, metabolism, growth, reproduction and population dynamics of these salps. They will use two independent modeling approaches, grounded in experimental and field data, to extend their observations to other time and space scales. interpret ouexperimental and modeling results will be interpreted within the context of the environmental conditions to which the salps are exposed. This integrated approach will provide the best basis for understanding how salp blooms form and persist. Results of this study will extend to other species that occur in high densities in many locations, allowing scientists to better evaluate the importance of salps in biogeochemical cycles and in structuring the pelagic environment.



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Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)

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