Nearshore Eelgrass Inventory Final Report 2012-2014
· Islands Trust Area · Reports & Publications · 2021
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Topics: Aquaculture & shellfish · Climate & environment · First Nations & reconciliation · Forestry & trees · Governance & budget · Marine & foreshore · Transportation & ferries · Fresh water & aquifers — our classification, not the Trust's.
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[[page 1]] [[page 2]] Acknowledgements SeaChange acknowledges the Mayne Island Conservancy Society for the use of its software and computer for data management. SeaChange would also like to acknowledge funding from the following sources, which has made this project possible: Islands Trust, Islands Trust Fund, the Capital Regional District, the Comox Valley Regional District, Metro Vancouver, the Greater Victoria Savings and Credit Union Legacy Foundation, Vancouver City Savings (Vancity), the Public Conservation Assistance Fund, Moonstone Enterprise, the Pacific Salmon Foundation and the Victoria Foundation. Thank you. [[page 3]] Contents ACKNOWIEAEEMENLS ......cscccccccessssssscceccessssssneseceesssseseeeeeeeeeessaeeeecesseesaeeeeseessesaseeeeeessseaaeeseceseuesaeeeesesessseaaaeesesss i Lo INEOCDUCTION 00. eee eeeceneeeeneeeeseeeeaeersaeereneeesseeeesaeessaeensaeessaeessaeersaeeeeaeessaeesenaeessaeseaeeeaeseaeersaeeseaeeesaaees 1 2 = Importance of Eelgrass .........cecessscccsssscecsssseccsssseeecssseceseseecssseeeeseaeeesesseeeeseeeecseseeeesesueeeseeaeeeseeueeeenaees 1 2.1 BiOCIVErSity ........ccccccccccccesssssscececeeseesnneeeeesseeseeueeeeeseeeeeeaeeeeeeeeeesseeeessseeeaaeesessceseeaueeesesseeesuaeeseeeseeaaas 2 2.2 BlUC CarDONn......eescecesccesseceseeseneecsseeessnecsceceaeecsececceneeeeaeeceaeeceaeeceaeeceaceceanecseaeceeaeeseaeeceaeeesrestaneseeneseaas 2 2.3 ECOSYSTEM SOMVICES 200... cccccccccccccccecceceeeececeeeeeeeeeees se seaeaeassssseaeseseesessauasauaaaaaaaaaeaaaeceaeeeceeeeeeeeeeeeeseeeeeeesenes 2 3 —_ Eelgrass Habitat Characteristics ........eescecsceessseeeseecsneeeeseeeeseeessaeeesaeensaeesaeessaeeesseeseaeeseseeeneaeesaeeseaeeseaeeneas 3 3.1 Wildlife COrriGlors ..........eeccceesceeencceeececesseeeseecsenecceneeceaeeceacecsaueceaeecsenecsaeeeeaecseaeeeeaseseaeeenreseaneseeneeeaees 4 A Impacts from HUMAN ACTIVITIES 20... ee ccecccesseceeseneeceseneeeeesaseeeesneecessaeeeesenseeeesaeeesaaseeeseaseeeesaeeesseaaeeetegs 4 4.1 Removal and Burial ............::cccescccscecseeeecseeesseceenecseneeceueecsaceceaeeceaeecseeceneesaeceeaeeeeneceeneeeeeeceaeeseressas 5 4.2 Pollution and Changes to Freshwater INPUut ............c::cccssssccssseeceeseneeesesneeecseseeeeeeeeeeeseeeeseseeeeeseaees 5 4.3 FOreStry ACTIVITIES ...........cccceeessssssssssnsnsneneceneneeeeseeeeeeseeeceeeeeseseeeeeeesessssseseeesssssusussssssauaauausaaeaaaaaansneges 6 4.4 CO) IRS) 6) | eee ee 6 4.5 Shading by Overwater Structures ...........cccscccccceessssnceccecesseseeeeceeesecsueeeeeeeseeneeeeeeseeeenaeeeeeeesesesiseeeees 6 4.6 Effects Of BOating...........cccsssssccccsscssssssccccccsessneeeeeccessesnsseeeeeeeeesssseeseeeseeeuseeeecsseseeaueeecessseeauaneseseseeeanas 6 5 __ Eelgrass and Rising Sea Levels ............cccsscccsssssccsssseeecsesseeeseseeesesesecseeeeeessaeeesseeeeecesaeeeeseaeeeeseaeeeeseeneeeeseas 6 6 = Mapping Methodology...........ccccsssccccccesssssnneeeecesseesneeeeeeeeseeeeeeeeeeeseeseaeeeeeecseeeseeeseseesaesneeeeeesesseeaaeeeeeeeees 7
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