Optical, chemical, and biological oceanographic conditions on the Scotian Shelf and in the eastern Gulf of Maine in 2015

This entry provides access to the figures and data tables that feature in the CSAS Research Document titled 'Optical, chemical, and biological oceanographic conditions on the Scotian Shelf and in the eastern Gulf of Maine in 2015'.

Please consult the meta-data text file that accompanies the zip file download for the figure on the data usage policy and appropriate citation. The meta-data file also provides field descriptors and any other information that may be useful in interpreting the data provided in relation to the accompanying imagery.

Abstract:

As warm and variable ocean conditions persisted in the Maritimes Region in 2015, there was increasing evidence of a shift in both phytoplankton and zooplankton communities away from the dominance of large phytoplankton and copepods toward smaller phytoplankton and copepod species. Although deep-water nitrate inventories were mainly higher than average in 2015, deep silicate and phosphate inventories were lower than average on the Scotian Shelf for the third year in a row. The spring bloom started later than normal and was weaker in magnitude and shorter in duration than usual. Phytoplankton biomass anomalies were mixed across the Shelf, but the abundance of large phytoplankton, particularly diatoms, was lower than average, continuing a pattern started in 2009. The abundance of the biomass-dominant copepod species Calanus finmarchicus and zooplankton biomass overall were lower than average overall in 2015, as was the abundance of Arctic Calanus species, continuing a pattern started during the last 4-7 years. In contrast, the abundances of offshore copepods were higher than average. Changes in phytoplankton and zooplankton communities observed in recent years indicate poor feeding conditions for planktivorous fish, birds, and mammals. Continuous Plankton Recorder sampling, the reporting of which lags Atlantic Zone Monitoring Program sampling by one year, indicated that in 2014 the spring phytoplankton bloom occurred earlier and was of shorter duration than normal over the entire Scotian Shelf and that the springtime peaks in abundance of the dominant zooplankton taxa Calanus I-IV and C. finmarchicus V-VI were also relatively early and relatively short-lived. 2014 annual abundance anomalies were unusually high for hyperiid amphipods and foraminifera over the entire Scotian Shelf in 2014, and unusually low for euphausiids. Annual abundance anomalies for most other taxa were at near normal levels on the western Scotian Shelf and below normal levels on the eastern Scotian Shelf.

http://www.dfo-mpo.gc.ca/csas-sccs/Publications/ResDocs-DocRech/2017/2017_012-eng.html

Date ( RI_367 ): 2017-04-24

Date ( RI_366 ): 2017-04-24

RI_415

Government of Canada; Fisheries and Oceans Canada - Catherine Johnson ( Research scientist, Bedford Institute of Oceanography )

Dartmouth , Nova Scotia , Canada

Other citation details: Johnson, C., Devred, E., Casault, B., Head, E., and Spry, J. 2017. Optical, Chemical, and Biological Oceanographic Conditions on the Scotian Shelf and in the Eastern Gulf of Maine in 2015. DFO Can. Sci. Advis. Sec. Res. Doc. 2017/012. v + 53 p.

ISSN: 1919-5044

Status: completed; complété RI_593

Maintenance and update frequency: notPlanned; nonPlanifié RI_542

Keywords ( RI_530 )

Plankton
Chlorophyll
Nutrients

Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )

Earth sciences
Oceanography
Water
Environmental sciences
Salt water
Coastal waters
Oceans
Marine biology

Use limitation: Open Government Licence - Canada (http://open.canada.ca/en/open-government-licence-canada)

Access constraints: license; licence RI_606

Use constraints: license; licence RI_606

Spatial representation type: textTable; texteTable RI_637

Metadata language: eng

Metadata language: fra

Topic category

Biota
Environment
Geoscientific information
Oceans

Begin date: 2015-01-01

End date: 2015-12-31

Reference system identifier: EPSG / 4326 / 8.2.6

Distribution format

ZIP ( 10.3.1 )

RI_417

Government of Canada; Fisheries and Oceans Canada

OnLine resource: Fig 06 : Mixing properties at the fixed stations ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 08 : Optical properties at the fixed stations ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 10 : Nitrate inventories at the fixed stations ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 11 : Maritimes region nutrients anomaly scorecard ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 15 : Chlorophyll inventories at the fixed stations ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 16 : Microplankton abundance and community composition at the fixed stations ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 17 : Maritimes region plankton anomaly scorecard ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 18 : Microplankton abundance anomaly scorecard at the fixed stations ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 20 : Zooplankton biomass at the fixed stations ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 21 : Zooplankton abundance and community composition at the fixed stations ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 22 : Calanus finmarchicus abundance and stage distribution at the fixed stations ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 23 : Dominant copepods abundance ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 24 : Zooplankton biomass - AZMP sections ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 25 : Zooplankton biomass - Ecosystem trawl surveys ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 26 : Calanus finmarchicus abundance - AZMP sections ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 27 : Calanus finmarchicus abundance - Ecosystem trawl surveys ( HTTP )
Supporting Document;ZIP;eng,fra

OnLine resource: Fig 28 : Maritimes region indicator copepods groups abundance anomaly scorecard ( HTTP )
Supporting Document;ZIP;eng,fra

File identifier: f8c4efc1-ca70-486c-8ee0-32471f49e9a9 XML

Metadata language: eng; CAN

Character set: utf8; utf8 RI_458

Parent identifier: b81c8d9c-690f-4c2a-aadc-7935c0923cc0 b81c8d9c-690f-4c2a-aadc-7935c0923cc0

Hierarchy level: dataset; jeuDonnées RI_622

Date stamp: 2017-09-19T14:39:44

Metadata standard name: North American Profile of ISO 19115:2003 - Geographic information - Metadata

Metadata standard version: CAN/CGSB-171.100-2009

RI_420

Government of Canada; Fisheries and Oceans Canada - Mathieu Ouellet ( Senior Advisor, Oceans Science Branch )

Ottawa , Ontario , Canada

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