Camera Surveys of the Subtidal Flora of Nova Scotia and Southwest New Brunswick 2022-2023

URLhttps://ipt.iobis.org/obiscanada/resource?r=camera_surveys_of_the_subtidal_flora_of_nova_scotia_2022-2023
Repository URL http://ipt.vliz.be/obiscanada/
Node OBIS Canada
Published2025-02-05 15:50
First registered2024-07-29 12:50
Abstract

To assess the current distribution of kelp beds and other macroalgae in Nova Scotia and Southwest New Brunswick, subtidal drop camera surveys were performed from 2022-2023 at 140 sites. For each site, a GoPro HERO 10 camera was towed along a deep (7-12m) and shallow (3-5m) depth contour until 20 images were acquired per depth. Where possible, species were identified from photos, with particular care given to kelps (defined here as orders Laminariales and Tilopteridales) and fucoids (order Fucales). Crust-forming algae was not counted. Percent cover was calculated using a 10x10 point grid overlaid on each image and recording the dominant cover type at each point. The depth (in meters) of each photo after correcting for tide height ranged from ~0.5m to ~12m. Depths were corrected to chart datum (lowest astronomical tide) using tide predictions from the nearest tide station, taken from tides.gc.ca. Sampling was performed between July and October.

CitationKrumhansl K, Brooks C, Lowen B, DiBacco C, (2025). Camera Surveys of the Subtidal Flora of Nova Scotia and Southwest New Brunswick 2022-2023. Version 1.7. Fisheries and Oceans Canada. Samplingevent dataset. https://ipt.iobis.org/obiscanada/resource?r=camera_surveys_of_the_subtidal_flora_of_nova_scotia_2022-2023&v=1.7
Citation IDhttps://doi.org/10.25607/pee8qj
RightsThis work is licensed under a Creative Commons Attribution (CC-BY 4.0) License
Keywords Samplingevent, oceans, subtidal flora, kelp beds, aquatic plants.
Contacts
Creator Kira Krumhansl
Fisheries and Oceans Canada
Creator Claudio DiBacco
Fisheries and Oceans Canada
Contact Kira Krumhansl
Fisheries and Oceans Canada
Metadata Provider Kira Krumhansl
Fisheries and Oceans Canada
Metadata Provider Cody Brooks
Fisheries and Oceans Canada
Metadata Provider Ben Lowen
Fisheries and Oceans Canada
Metadata Provider Claudio DiBacco
Fisheries and Oceans Canada

Statistics

Occurrence records 636
Species level 531
Absence records 1,184
Event records 140
MoF records 1,960
Sequence records 0
Species 12
Taxa 13
Time range 2022 - 2023

This dataset has appeared in 850 downloads in 2025, with a total of 434,844 records.

Data quality

Dropped records

Dropped records 0
Not marine 0
No WoRMS match 0
No coordinates 0
Zero coordinates 0

Taxonomic issues

Marine unsure 0
No accepted name available 0

Missing and invalid fields

Field Missing Invalid
coordinateUncertaintyInMeters 1,820 0
maximumDepthInMeters 1,820 0
minimumDepthInMeters 1,820 0

Spatial issues

Records on land 91
More than 20 km from shore 0
Depth exceeds bathymetric depth 0

Top taxa

IUCN Red List All taxa
Scientific name Records
Laminariaceae Bory, 1827
Phylum Ochrophyta > Class Phaeophyceae
105
Saccharina latissima (Linnaeus) C.E.Lane, C.Mayes, Druehl & G.W.Saunders, 2006
Phylum Ochrophyta > Class Phaeophyceae
105
Laminaria digitata (Hudson) J.V.Lamouroux, 1813
Phylum Ochrophyta > Class Phaeophyceae
92
Membranipora membranacea (Linnaeus, 1767)
Phylum Bryozoa > Class Gymnolaemata
74
Desmarestia aculeata (Linnaeus) J.V.Lamouroux, 1813
Phylum Ochrophyta > Class Phaeophyceae
56
Fucus serratus Linnaeus, 1753
Phylum Ochrophyta > Class Phaeophyceae
51
Desmarestia viridis (O.F.Müller) J.V.Lamouroux, 1813
Phylum Ochrophyta > Class Phaeophyceae
40
Agarum clathratum Dumortier, 1822
Phylum Ochrophyta > Class Phaeophyceae
26
Ascophyllum nodosum (Linnaeus) Le Jolis, 1863
Phylum Ochrophyta > Class Phaeophyceae
23
Codium fragile (Suringar) Hariot, 1889
Phylum Chlorophyta > Class Ulvophyceae
22

Distribution

Records

Composition

detailed (class) simple

Measurement types

measurementType measurementTypeID Records
mean corrected depth http://vocab.nerc.ac.uk/collection/P01/current/MBANZZ11/ 1,960
mean percent cover http://vocab.nerc.ac.uk/collection/P01/current/PCOV7736/ 1,820

Occurrences

scientificNameeventDatedecimalLongitudedecimalLatitudecollectionCodecatalogNumber