BIOL 1902 Lecture Notes - Lecture 21: Cardiac Glycoside, Fagus Grandifolia, Umbel
12 Apr 2016
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Getting progeny off to a good start in life: Parental care in animals: in the care of parents until ready to start own life. Armour = hard seed coats (physical protection: e. g. , scaly cones, acorns, beaked hazel, american beech. Seeds can be protected chemically: unripe berries protected w/ bitter terpenoids, aposematic colouration, young cones full of resin (terpenoids, milkweed seeds well protected by pod full of cardiac glycosides (terpenoids) Plants in open, sunny habitats, such as old fields, often use the wind: wind dispersal called anemochory, e. g. No solution = perfect; drawback of wind: too much wind, missing target habitat, such as waters. Each fireweed flower produces 70 000 100 000 seeds. Hooks & barbs catch on hair or feathers: seeds hitch-hike; stick-tight. Dispersal via animals = zoochory (can happen on inside or outside of animals) E. g. bears feed on blueberries seeds come out in droppings: waxwings eat fruit & poop out seeds. Seed dispersers: waxwings exploited as seed dispersers.
