Incidence of light and ocean acidification on microbial community, dimethyl sulfide, dimethylsulfoniopropionate and macronutrients in Baffin Bay, Nunavut, Canada

An incubation experiment was conducted on board of the Canadian research icebreaker CCGS Amundsen between 6 and 15 August 2015. The water was collected near the nitracline at 38 m depth in Baffin Bay using 12-L Niskin-type bottles deployed on a CTD rosette system. A natural Arctic plankton community in a pre-bloom stage (initial high nutrient-low Chl a concentrations) was exposed over 9 days to reduced pH conditions under two contrasting light regimes. The two light regimes were designed to simulate the mean irradiance in an ice-free 5-m thick surface mixed layer (HL, marginal ice bloom conditions) and the mean irradiance at 5 m depth under a melting ponded ice pack (LL, under-ice bloom/ subsurface chlorophyll maximum conditions). The pH gradient comprised 6 levels covering the range of pH expected between the present and the year 2300. During the incubation, a phytoplankton bloom developed in every incubation bag and diatoms dominated the biomass (Chaetoceros spp.). Temporal variations of pH, dissolved inorganic carbon, total alkalinity, chlorophyll a, macronutrients, DMS(P), flow cytometry (nano- and pico-phytoplankton, bacteria, virus), taxonomy, salinity and incubator's temperature are available.

Simple

Date (Publication)
2017-11-13
Principal investigator
 

Levasseur , Maurice
Originator
 

Hussherr, Rachel
ri_419
 

Lizotte, Martine
Other citation details

Data Citation: Hussherr, R., Levasseur, M. and Lizotte, M. (2017) Incidence of light and ocean acidification on microbial community, dimethyl sulfide, dimethylsulfoniopropionate and macronutrients in Baffin Bay, Nunavut, Canada. Waterloo, Canada: Canadian Cryospheric Information Network (CCIN). Unpublished Data

Additional Publication- can be accessed: Hussherr R. et al., Impact of ocean acidification on Arctic phytoplankton blooms and dimethylsulfide production under simulated ice-free and under-ice conditions, Biogeosciences Discuss., doi:10.5194/bg-2016-501.
Purpose

The main objective of this study was to experimentally assess the impact of decreasing pH on the DMS produced by an Arctic phytoplankton seasonal bloom. Furthermore, we investigated how light conditions corresponding to those experienced by a marginal ice phytoplankton bloom and an under-ice or subsurface phytoplankton bloom could modulate the effects of pH on phytoplankton and DMS variations. The latter was motivated by the strong contribution of subsurface phytoplankton layers to annual productivity in several sectors of the Arctic as well as the apparent increasing occurrence of under-ice blooms, attributed to the thinning of sea ice and the replacement of the multiyear ice by first-year ice. This study was funded by the NSERC Discovery Grant Program and Northern Research Supplement Program (M. Levasseur, M. Gosselin), as well as by the NETCARE network (funded under the NSERC Climate Change and Atmospheric Research program), ArcticNet (The Network of Centres of Excellence of Canada), and the Department of Fisheries and Oceans Canada. This is a contribution to the research programs of NETCARE, ArcticNet and Quebec-Ocean.
Status
Completed
Point of contact
 

Canadian Cryospheric Information Network

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Polar Data Catalogue

200 University Avenue West, University of Waterloo

 ,

Waterloo

 ,

Ontario

 ,

N2L 3G1

 ,

Canada
(519) 888-4567 x32689
polardata.ca

Polar Data Catalogue Thesaurus (Canada)

  • Air-water exchange

  • Algae

  • Alkalinity

  • Biogeochemistry

  • Chlorophyll

  • Climate change

  • Diatoms

  • Dimethylsulfide (DMS)

  • Dimethylsulfoniopropionate (DMSP)

  • Dissolved inorganic carbon (DIC)

  • Gradients

  • Ocean acidification

  • pH

  • Phytoplankton
Place

  • Baffin Bay, Nunavut, Canada - OABMI
Access constraints
Other restrictions
Use constraints
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Terms of Use of the Polar Data Catalogue: https://www.polardata.ca/pdcinput/public/termsofuse

Metadata language

eng; CAN
Topic category
  • Environment
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Begin date
2015-08-06
End date
2015-08-15
Supplemental Information

Summary: Not Applicable Research Program(s): ArcticNet,Other. For further information: rachel.hussherr@gmail.com rachel.hussherr@gmail.com

Distribution format

  • Digital file

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Distributor
 

Canadian Cryospheric Information Network

 -

Polar Data Catalogue

200 University Avenue West, University of Waterloo

 ,

Waterloo

 ,

Ontario

 ,

N2L 3G1

 ,

Canada
(519) 888-4567 x32689
Included with dataset
No
File identifier
c56a4eb8-6188-4be2-8620-065b085a9b29 XML
Metadata language

eng; CAN
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2022-04-08T13:00:23
Metadata standard name

North American Profile of ISO 19115:2003
Metadata standard version

2009-01-01
Point of contact
 

Canadian Cryospheric Information Network

 -

Polar Data Catalogue

200 University Avenue West, University of Waterloo

 ,

Waterloo

 ,

Ontario

 ,

N2L 3G1

 ,

Canada
(519) 888-4567 x32689
Dataset URI

https://www.polardata.ca/pdcsearch/PDCSearchDOI.jsp?doi_id=12823

 
 

Overviews

overview

Spatial extent

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Keywords

Polar Data Catalogue Thesaurus (Canada)
Air-water exchange Algae Alkalinity Biogeochemistry Chlorophyll Climate change Diatoms Dimethylsulfide (DMS) Dimethylsulfoniopropionate (DMSP) Dissolved inorganic carbon (DIC) Gradients Ocean acidification Phytoplankton pH

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