Diversity, Richness, and Biomass Hotspots

Diversity, Richness, and Biomass Hotspots This geodatabase includes hotspot maps of 1) nearshore habitat richness, 2) diversity (fish and invertebrates), and 3) biomass (using catch per unit effort of fish and invertebrates), as well as two layers showing the spatial extent of the diversity and biomass hotspot analyses. Full details and methods can be found in the Rubidge et al. 2018 CSAS Research Document 2018/053 available here or at https://waves-vagues.dfo-mpo.gc.ca/Library/40759842.pdf. These data were reviewed as part of a Canadian Science Advisory Secretariat (CSAS) regional peer review process on Nov 1-2, 2017. Habitat Richness Hotspots: Because there are no systematic surveys of nearshore species that span the entire coastline of Northern Shelf Bioregion, the nearshore habitat richness hotspots were developed as a proxy for species diversity in nearshore areas. Habitat richness was calculated from eight habitat features: eelgrass, surfgrass, canopy-forming kelp, estuaries, areas of high rugosity, and hard, mixed, and soft substrate. The number of features within 1 km x 1 km planning units was counted, and hotspots were identified using the Getis-Ord G* tool in ArcGIS. Planning units with Gi_Bin values of 3 (99% confidence) were classified as habitat richness hotspots. Diversity and Biomass Hotspots: Hotspots of fish and invertebrate diversity and biomass were developed as proxies for spatial patterns of productivity in the Northern Shelf Bioregion. Diversity (Shannon diversity) and biomass (kg/hour or count/hook/hour) were calculated from DFO synoptic trawl and outside hard-bottom longline (HBLL) survey catch records. The outside HBLL survey was previously referred to as Pacific Halibut Management Area (PHMA) survey. The synoptic trawl and HBLL surveys have complementary spatial coverage, with the HBLL surveys occurring in more coastal areas (20–260 m) and the synoptic trawl surveys occurring on deeper shelf areas (50–1300 m). Hotspots were identified using the Getis-Ord G* tool in ArcGIS for five separate analyses: fish biomass (trawl), fish diversity (trawl), fish diversity (longline), invertebrate biomass (trawl), and invertebrate diversity (trawl). Using the Minimum Bounding Geometry Tool, convex hull polygons were drawn around groups of hotspot points (Gi_Bin values of 1, 2, or 3; confidence ≥90%) containing 10 or more points. The resulting polygons were then buffered by 1 km and manually edited where needed to exclude any large areas of the polygons that did not include hotspot points. 2023-07-11 Fisheries and Oceans Canada emily.rubidge@dfo-mpo.gc.ca Nature and EnvironmentEBSAEcologically and biologically significant areas (EBSA)Northern Shelf BioregionOceansBiological diversityEnvironment Diversity, Richness, and Biomass Hotspots_geodatabaseFGDB/GDB https://pacgis01.dfo-mpo.gc.ca/FGPPublic/Diversity_Richness_Biomass_Hotspots/Diversity_Richness_Biomass_Hotspots.gdb.zip Data DictionaryHTML https://pacgis01.dfo-mpo.gc.ca/FGPPublic/Diversity_Richness_Biomass_Hotspots/Data_dictionary_EN_FR_Diversity_richness_and_biomass_hotspots.htm ReferencesHTML https://pacgis01.dfo-mpo.gc.ca/FGPPublic/Diversity_Richness_Biomass_Hotspots/References_EN_FR_Diversityy_richness_and_biomass_hotspots.htm CSAS Research Document 2018/053PDF https://waves-vagues.dfo-mpo.gc.ca/Library/40759842.pdf CSAS Science Advisory Report 2018/040PDF https://waves-vagues.dfo-mpo.gc.ca/Library/40714081.pdf CSAS Research Document 2018/053PDF https://waves-vagues.dfo-mpo.gc.ca/Library/40759854.pdf CSAS Science Advisory Report 2018/040PDF https://waves-vagues.dfo-mpo.gc.ca/Library/40714779.pdf Diversity, Richness, and Biomass Hotspots_shapefilesSHP https://pacgis01.dfo-mpo.gc.ca/FGPPublic/Diversity_Richness_Biomass_Hotspots/Diversity_Richness_Biomass_Hotspots_shapefiles.zip Diversity, Richness, and Biomass Hotspots GIS Hub metadataPDF https://pacgis01.dfo-mpo.gc.ca/FGPPublic/Diversity_Richness_Biomass_Hotspots/Hotspots_GISHub_metadata_EN.pdf Diversity, Richness, and Biomass Hotspots GIS Hub metadataPDF https://pacgis01.dfo-mpo.gc.ca/FGPPublic/Diversity_Richness_Biomass_Hotspots/Hotspots_GISHub_metadata_FR.pdf Diversity, Richness, and Biomass HotspotsESRI REST https://gisp.dfo-mpo.gc.ca/arcgis/rest/services/FGP/Diversity_Richness_Biomass_Hotspots/MapServer Diversity, Richness, and Biomass HotspotsESRI REST https://gisp.dfo-mpo.gc.ca/arcgis/rest/services/FGP/Diversity_Richness_Biomass_Hotspots/MapServer

This geodatabase includes hotspot maps of 1) nearshore habitat richness, 2) diversity (fish and invertebrates), and 3) biomass (using catch per unit effort of fish and invertebrates), as well as two layers showing the spatial extent of the diversity and biomass hotspot analyses.

Full details and methods can be found in the Rubidge et al. 2018 CSAS Research Document 2018/053 available here or at https://waves-vagues.dfo-mpo.gc.ca/Library/40759842.pdf. These data were reviewed as part of a Canadian Science Advisory Secretariat (CSAS) regional peer review process on Nov 1-2, 2017.

Habitat Richness Hotspots:

Because there are no systematic surveys of nearshore species that span the entire coastline of Northern Shelf Bioregion, the nearshore habitat richness hotspots were developed as a proxy for species diversity in nearshore areas. Habitat richness was calculated from eight habitat features: eelgrass, surfgrass, canopy-forming kelp, estuaries, areas of high rugosity, and hard, mixed, and soft substrate. The number of features within 1 km x 1 km planning units was counted, and hotspots were identified using the Getis-Ord G* tool in ArcGIS. Planning units with Gi_Bin values of 3 (99% confidence) were classified as habitat richness hotspots.

Diversity and Biomass Hotspots:

Hotspots of fish and invertebrate diversity and biomass were developed as proxies for spatial patterns of productivity in the Northern Shelf Bioregion. Diversity (Shannon diversity) and biomass (kg/hour or count/hook/hour) were calculated from DFO synoptic trawl and outside hard-bottom longline (HBLL) survey catch records. The outside HBLL survey was previously referred to as Pacific Halibut Management Area (PHMA) survey. The synoptic trawl and HBLL surveys have complementary spatial coverage, with the HBLL surveys occurring in more coastal areas (20–260 m) and the synoptic trawl surveys occurring on deeper shelf areas (50–1300 m). Hotspots were identified using the Getis-Ord G* tool in ArcGIS for five separate analyses: fish biomass (trawl), fish diversity (trawl), fish diversity (longline), invertebrate biomass (trawl), and invertebrate diversity (trawl). Using the Minimum Bounding Geometry Tool, convex hull polygons were drawn around groups of hotspot points (Gi_Bin values of 1, 2, or 3; confidence ≥90%) containing 10 or more points. The resulting polygons were then buffered by 1 km and manually edited where needed to exclude any large areas of the polygons that did not include hotspot points.

Data and Resources
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Contact Information

Delivery Point: Institute of Ocean Sciences 9860 West Saanich Road P.O. Box 6000

City: Sidney

Administrative Area: British Columbia

Postal Code: V8L 4B2

Country: Canada

Electronic Mail Address: emily.rubidge@dfo-mpo.gc.ca

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