2023 SAR Speaker Series 4 Presentation
· Islands Trust Area · Miscellaneous · 2023
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Topics: Marine & foreshore · Aquaculture & shellfish · First Nations & reconciliation · Climate & environment — our classification, not the Trust's.
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9 Monitoring and Restoration of Rare Ecosystems Gulf Islands National Park Reserve Sibylla Helms and Aimee Pelletier 10 Outline • Gulf Islands National Park Reserve • Ecological Integrity (EI) monitoring framework • What we are seeing • EI monitoring and Active Management • Case study: coastal sands and species at risk 11 Gulf Islands National Park Reserve • 15 Islands and numerous islets • 34 km 2 land base • 26 km 2 marine area • Fragmented • Surrounded by urban areas • Protection • History of human use 12 What is Ecological Integrity (EI)? Defined as: "...a condition that is determined to be characteristic of its natural region and likely to persist, including abiotic components and the composition and abundance of native species and biological communities, rates of change and supporting processes.” Iain Reid 13 The primary objectives are to understand: • The state of ecological integrity • How it is changing over time • How management activities affect ecological integrity Ecological Integrity Monitoring 14 Issues That Could Threaten EI Values • Hyperabundant browsers • Hyperabundant geese • Invasive plants • Altered/reduced fire regimes • Legacy of land modification • Fragmentation & adjacent land use • Pollution/ nutrients/ turbidity • Boats • Climate change! 15 Indicator Ecosystems Coastal\Marine Forest Freshwater Measures Eelgrass Bivalves (clams) Coastal Processes Black Oystercatchers Invasive Plants – islets Coastal Sands Vegetation Songbirds Garry Oak Encroachment Deer Landscape Diversity Salmonids Amphibians Water Quality Water Quantity Invasive plants 16 Indicator Ecosystem: Coastal/Marine Measure: Black Oystercatchers 17 Measure: Invasive Plants on Islets Small protected islets have high ecological value • Rare species • High plant diversity • Garry oak ecosystems 18 Indicator Ecosystem: Forest Measure: Songbirds 19 I ndicator Ecosystem: Freshwater Measure: Water Quality Average N:P ratio and Total Phosphorus 20 American Bullfrog (non-native) Pacific TreefrogRed-legged Frog Rough-skinned NewtLong-toed Salamander Measure: Amphibians 21 What is the condition of our measures? GoodFairPoorIn Development Eelgrass fishBlack Oystercatchers Eelgrass Health Coastal Erosion Water quality SongbirdsCSE Vegetation Garry Oak Encroachment Invasive Plants (islets) SalmonidsBivalves (clams) Forest Understory Health DeerFreshwater invasive plants Amphibians 22 Active Management • Hyperabundant deer populations and forest health – Sidney Island • Sea Gardens – ecocultural restoration • Coastal Sands Ecosystems – Sidney Island • Garry Oak – associated ecosystems on islets 23 • Parks Canada’s national funding program which provides short-term (1-5 years) resources for national parks, national historic sites and national marine conservation areas to undertake: • restoration actions to improve the status or trend of an ecosystem that is in poor or fair condition OR • recovery actions identified i
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