Inventory of macroalgae and benthic macroinvertebrates along a hypoosmolarity stress gradient in Barthelemy Bay and the Colombier, Mistassini, Franquelin and Saint-Nicolas rivers of the Upper North Shore, Quebec

This inventory, from September 26 to October 3, 2019, aimed to describe the structures in species and then in functional traits of the macroalgae and benthic macroinvertebrate communities from the small estuaries of the Upper North Shore of Quebec, namely Barthelemy Bay and the Colombier, Mistassini, Franquelin and Saint-Nicolas rivers. Three hypoosmotic stress levels and one control level (marine water) were targeted for each of the selected estuaries, with eight quadrats per level. The highest stress level sites were located closest to the river mouths (where freshwater inflow is greatest at low tide) while the zero stress sites were located at the edge of the St. Lawrence Lower Estuary (where high salinity is stable). Salinity was measured with a portable refractometer and a Castaway-type CTD (Conductivity-Temperature-Density) probe. The inventory was conducted using a stratified random sampling design and the sampling unit was a quadrat measuring 25 x 25 cm. The dataset provided includes information on abiotic factors (salinity, substrate type) as well as the presence of various species of macroalgae and benthic macroinvertebrates, identified to the lowest possible species or taxonomic level. To obtain the density and biomass of the various species identified, contact Marie-Valentine Loiseau.

This inventory is part of a doctoral study on global changes in the St. Lawrence system, mainly the study of marine benthic communities in response to changes in salinity, to ensure proper management of the environment in the face of future changes. The study has one main objective and four secondary objectives. The main objective is to describe the response of benthic communities in the mediolittoral zone to hypoosmotic stress (i.e. an abrupt decrease in salinity). Secondary objectives are: (1) To describe the structure and levels of specific and functional diversity of mediolittoral benthic macroinvertebrate and macroalgal communities along a salinity gradient; (2) To create a database of functional traits of interest for the most common species of the St. Lawrence marine mediolittoral zones ; (3) To measure the responses (mortality, growth rate, calorific content) of three species of molluscs in the mediolittoral zone to a hypoosmotic stress gradient and (4) To measure the responses of several species of benthic macroinvertebrates in the mediolittoral zone to several combined factors (hypoosmotic stress, acidification and turbidity increase).

This project was funded by DFO Coastal Environmental Baseline Program under Canada’s Oceans Protection Plan (OPP). This initiative aims at acquiring environmental baseline data that contribute to the characterization of important coastal areas and to support evidence-based assessments and management decisions, while preserving marine ecosystems.

Source identification:

Data

Loiseau, M.-V., Calosi, P., Gendreau, Y., & Cusson, M. (2021). Inventory of macroalgae and benthic macroinvertebrates along a hypoosmolarity stress gradient in Barthelemy Bay and the Colombier, Mistassini, Franquelin and Saint-Nicolas rivers of the Upper North Shore, Quebec (Version 1.0) [Data set]. Observatoire Global du Saint-Laurent. https://doi.org/10.26071/OGSL-4BB77D86-B94E

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Access and Use

Licence: Creative Commons Attribution 4.0

Data and Resources

Dates

Metadata Reference Date(s) May 31, 2021, 11:30 (UTC) (Creation)
May 31, 2021, 11:30 (UTC) (Revision)
Dataset Reference Date(s) March 31, 2021 (Creation)
March 31, 2021 (Revision)
Frequency of Update As Needed

Dataset extent

Map data © OpenStreetMap contributors

Additional Info

Field Value
Ocean Variables Other
Scope Dataset
Status Pending
Maintenance Note
Point of Contact
  • Name: Section Gestion de données, Pêches et Océans Canada
    Affiliation: Pêches et Océans Canada
    Contact Info Email: gddaiss-dmaissb@dfo-mpo.gc.ca
    Role: Point of Contact
Responsible Party
  • Individual Name: Section Gestion de données, Pêches et Océans Canada
    Organisation Name / Affiliation: Pêches et Océans Canada
    Contact Info Email: gddaiss-dmaissb@dfo-mpo.gc.ca
    Role: Custodian
  • Individual Name: Marie-Valentine Loiseau
    Organisation Name / Affiliation: Université du Québec à Rimouski
    Contact Info Email: mvalentine.loiseau@gmail.com
    Role: Principal Investigator
  • Individual Name: Piero Calosi
    Organisation Name / Affiliation: Université du Québec à Rimouski
    Contact Info Email: piero_calosi@uqar.ca
    Role: Collaborator
  • Individual Name: Yanick Gendreau
    Organisation Name / Affiliation: Pêches et Océans Canada
    Contact Info Email: yanick.gendreau@dfo-mpo.gc.ca
    Role: Collaborator
  • Individual Name: Mathieu Cusson
    Organisation Name / Affiliation: Université du Québec à Chicoutimi
    Contact Info Email: mathieu.cusson@uqac.ca
    Role: Collaborator
Spatial Extent {"type": "Polygon", "coordinates": [[[-67.735, 49.334], [-68.98, 49.334], [-68.98, 48.794], [-67.735, 48.794], [-67.735, 49.334]]]}
North Bounding Latitude 49.334
South Bounding Latitude 48.794
East Bounding Longitude -67.735
West Bounding Longitude -68.98
Temporal Extent Begin: 2019-09-26
End: 2019-10-03
Vertical Extent
Default Locale French
Citation identifier Authority: doi.org
Code Space: 10.26071
Code: ogsl-4bb77d86-b94e
Version: 1
Version 1.0