Environmental Science Concepts

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Positive Feedback Loop

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Rising temperatures and reduced rainfall lead to more intense fires, which release carbon dioxide, causing further temperature increases.

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Effect of Change on Caribou

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Lichen, the primary food for caribou, is being displaced by plants moving north due to global warming, affecting their food supply and migration.

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Primary Succession in Sand Dunes

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Grasses start primary succession in sand dunes, leading to shrubs and hardy trees.

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Vegetation & Soil in Gros Morne Park - Brown Area

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High in nickel, chromium, and magnesium, unsuitable for trees.

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Vegetation & Soil in Gros Morne Park - Green Forested Area

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Rich in calcium, preferred by trees.

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Aquatic Succession

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Lakes/ponds fill with nutrients and sediment, leading to vegetation growth. Floating vegetation forms bogs, which can transition to meadows and eventually forests.

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Invasive Alien Species - Definition

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Non-native species that can reproduce quickly and disrupt ecosystems.

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Impact of Invasive Alien Species

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22% of Canada’s endangered species are affected by alien invasions.

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Examples of Invasive Alien Species

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Dutch elm disease, purple loosestrife, Japanese knotweed, feral cats, rats, carp.

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Agricultural Costs of Invasive Alien Species

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500 alien plant species are agricultural weeds, increasing food costs.