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Lecture 17

BIOL 2903 Lecture 17: Lecture 17 – Natural History Frontenac Axis

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Department
Biology
Course
BIOL 2903
Professor
Michael Runtz
Semester
Winter

Description
Lecture 17 – Natural History Frontenac Axis Frontenac Axis: is part of the Canadian Shield. The Adirondacks are part of the same range/type of rocks. The Thousand Islands is also part of this same rock type. Rock types: (a) Granite (no bands – like gneissic would have) – no bubbling with acid. (b) Gneissic rock (bands) – no bubbling with acid. ***Therefore will find acidic loving plants, not calciphilic. It is the warmest part of the Great Lake St. Lawrence on the Canadian Shield. This is due to being near water St. Lawrence River and Lake Ontario (weak lake effect) and it is the most southern area of the Canadian Shield. Northern Plants and Mammals: acidic ferns (Rock Polypody) underside of the ferns have spore masses called fruit dots. Marginal Shield Fern. Martens, fishers, Red Squirrels and occasionally Eastern Wolves. The forests are dominantly hardwood forests, containing Sugar Maple, Yellow Birch, and Eastern Hemlock (in cooler areas). Pine Siskin (small finch) exploit seeds in cones. White pines are here too. Scarlet Tanager, Pileated Woodpecker, Gray Tree Frogs, Barred Owl, Chipmunks, Snowshoe Hare. We start to see plants and animals not from the north! Southern Plants & Animals in the Frontenac Axis: White Oak, Shagbark Hickory (bark is actually shaggy on this tree) they have large nuts, southern shrubs (Bladdernut, Prickly Ash – an important plant as Giant Swallowtail caterpillars feed on them, the butterflies lay their eggs on the plants).  Giant Swallowtail: have the defensive osmeterium. They expanded north, due to the change in temperature (1 degree change) allowing the caterpillars to survive the winter. They lay their eggs on Prickly Ash (caterpillars feed on them). Eastern Amberwing (small dragonfly).  Grey Squirrels: scatter hoard (have two color morphs: black and grey). Southern squirrels as they like to eat larger tree nuts. Sometimes they have large populations explosions, expanding to Algonquin Dome, but they never survive.  Eastern Cottontail: Snowshoe Hare vs. Cottontail Rabbit: ears and feet of the Cottontail are smaller and the Snowshoe hare has a white winter coat. ** The Frontenac Axis contains more Carolinian species then
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