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Found 10 records similar to Distribution of kelp on the coast of British Columbia extracted from CHS source data: 1904 - 2004
This dataset is a contribution to the development of a kelp distribution vector dataset. Bull kelp (Nereocystis leutkeana) and giant kelp (Macrocystis pyrifera) are important canopy-forming kelp species found in marine nearshore habitats on the West coast of Canada. Often referred to as a foundation species, beds of kelp form structural underwater forests that offer habitat for fishes and invertebrates. Despite its far-ranging importance, kelp has experienced a decline in the west coast of North America.
This program measures kelp density from annual dive transects during August and September at a number of sites in the Broken Group Islands of Pacific Rim National Park Reserve. Kelp species assessed include Agarum spp., Macrocystis pyrifera, Eisenia arborea, Pterygophora californica, Saccharina spp. and Desmarestia spp. Kelp forests are phyletically diverse, structurally complex and highly productive ecosystems in temperate rocky marine coastlines, thereby providing a suitable suite of measures indicative of subtidal ecosystem health.
This program focuses on capturing the abundance and structure of groundfish communities typical of nearshore kelp forests including Black Rockfish (Sebastes melanops), Copper Rockfish (Sebastes caurinus), Kelp Greenling (Hexagrammos decagrammus) and Sea Perch: Kelp Perch (Brachyistius frenatus), Pile Perch (Rhacochilus vacca) and Striped Perch (Embiotoca lateralis) combined. Surveys were completed annually in August and September at sites within the Broken Group Islands and consisted of a transect through a kelp forest patch at approximately 10m depth. Surveys began in 2008 and changed methodology in 2013 from a 2 diver survey (2 surveyors along a 25m long by 4m wide band transect) to a 1 diver survey (1 diver along a 30m long by 2 m wide band transect). This data is used to determine the status and trend in kelp-forest associated fish, including fish abundance and the effectiveness of the Rockfish Conservation Areas (RCAs) on fish abundance.
The purpose of this study was to characterize the kelp bed at Batture-aux-Alouettes, a preferred food source for the green sea urchin (Strongylocentrotus droebachiensis). The green urchin is fished commercially in Quebec and the fishing effort is concentrated on the Batture-aux-Alouettes near Tadoussac, at the mouth of the Saguenay Fjord. The study was conducted in two separate phases in 2018 and 2019. The main objective of this study was to determine the abundance and biomass of the kelp bed at Batture-aux-Alouettes.
Distribution of kelp beds in coastal British Columbia. Attribute information includes relative abundance, species, biomass and density of the beds. CRIMS is a legacy dataset of BC coastal resource data that was acquired in a systematic and synoptic manner from 1979 and was intermittently updated throughout the years. Resource information was collected in nine study areas using a peer-reviewed provincial Resource Information Standards Committee consisting of DFO Fishery Officers, First Nations, and other subject matter experts.
The Canadian Hydrographic Service (CHS) Low Water Mark Lines provide alongshore and across-shore geomorphological and biological attributes of the low water mark shoreline. The lines are used in the CHS nautical charts to represent the level reached by sea water at low tide.
The Canadian Hydrographic Service (CHS) High Water Mark Lines provide alongshore and across-shore geomorphological and biological attributes of the high water mark shoreline. The lines are used in the CHS nautical charts to represent the level reached by sea water at high tide.
The smallest marine mammals in North America, sea otters occupy chilly coastal waters in the central and north Pacific Ocean. Averaging 1.2 metres in length, male sea otters typically weigh about 45 kilograms. Females are slightly smaller. Otters have large, flat heads, large teeth to crush shells, and blunt noses with long, stiff whiskers.
*CHS NONNA data has been updated: April 21, 2022 *
The Canadian Hydrographic Service (CHS) offers a complete inventory of bathymetric data free to the general public for non-navigational use called 'CHS NONNA' for the 'NON-NAvigational' purpose of the data. The product is available in a spatial resolution of 10 metres or 100 metres. To directly access the CHS NONNA Data Portal please follow this link - https://data.chs-shc.ca/login
(Note: The data portal is NOT compatible with Internet Explorer browser). NEW NONNA Packages
A NONNA Package is a ZIP file containing a collection of NONNAP datasets to ease the download of large amounts of high resolution data.
Borehole geophysical log number NS-CH-CH-MUSC-95-4. Located in Chaswood, NS.