Eelgrass Mapping Summary Report, 2022

Extracted text (beginning)

MCORI Project: 21-10                 March 2022 
 
 
ShoreZone Polygon Mapping Summary Report 
 
Eelgrass in the Islands Trust Area 
 
 
 
Boat Cove, Lasqueti Island (bc20_sc_16658) 
 
 
Prepared for: 
The Islands Trust Council 
Suite 200-1627 Fort Street 
Victoria, BC, V8R 1H8 
 
Prepared by: 
Coastal and Ocean Resources 
759A Vanalman Ave.  
Victoria, BC, V8Z 3B8 Canada 
(250) 658-4050 
www.coastalandoceans.com  

 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The suggested citation for this report is: 
Coastal and Ocean Resources, 2022. ShoreZone Polygon Mapping Summary 
Report: Eelgrass in the Islands Trust Area. Produced for the Islands Trust Council, 
Victoria, BC. Produced by Coastal & Ocean Resources, Victoria, BC. 11p. 

 
ii 
 
TABLE OF CONTENTS 
 
 
SECTION TITLE  PAGE 
  
 
 Table of Contents ii 
 List of Figures and Tables iii 
   
1 INTRODUCTION 1 
   
2 EELGRASS POLYGON DATA SUMMARY 3 
2.1 Methodology 3 
2.2 Results 8 
 
 
 
   
3 REFERENCES  11 
 
  

 
iii 
 
LIST OF FIGURES AND TABLES 
 
Figure Description Page 
1 Extent of ShoreZone imagery within the Islands Trust area  2 
2 Example of a Sparse Density category Eelgrass in the Islands Trust area    4 
3 Example of a Moderate Density category Eelgrass in the Islands Trust 
area    
4 
4 Example of a Dense Density category Eelgrass in the Islands Trust area 5 
5 Example of an area where the ShoreZone image and the satellite image 
show a large disparity  
6 
6 Example of a ShoreZone image where SeaChange indicated Eelgrass 
was present but it was not visible 
7 
7 Example of the Eelgrass habitat polygons mapped around Lasqueti Island 8 
8 Example of the Eelgrass habitat polygons mapped around Thetis and 
Penelakut Islands 
9 
 
 
Table 
 
Description 
 
Page 
1 Definitions of the ShoreZone Eelgrass bioband 3 
2 Totals of Eelgrass habitat polygons mapped in the Islands Trust area by 
Density category 
10 
3 Totals of Eelgrass habitat polygons mapped in the Islands Trust area by 
Confidence category 
10 

 
1 
1  INTRODUCTION 
 
ShoreZone is an imaging and habitat classification system for the coastal nearshore 
margin including the shallow subtidal, intertidal shoreline and supratidal fringe. One 
objective of ShoreZone is to produce a georeferenced, searchable inventory of the 
physical and biological attributes of    coastal habitats. ShoreZone imagery and habitat 
mapping attributes can provide a useful baseline from which to study change over time, 
while the attributes mapped (such as shoreline sediments, predicted oil residence and 
biotic communities) provide an important resource for scientists, managers and 
responders. The ShoreZone mapping system provides a decision support tool with 
many potential uses including community planning, facilities citing, conservation 
planning, research and fisheries management, emergency planning and response, 
search and rescue, education and habitat modeling. 
 
The ShoreZone system was develope

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