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Wind Seeds (Field Progression)

Wind Seeds (Field Progression)
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This video focuses on ways that meadow plants invade an open area, and how they are followed by trees, noting that most invasive types are mainly blown in by the wind. Several mechanisms for wind dispersal are shown by the dandelion, thistle, and milkweed that use delicate "parachutes," followed by trees that have evolved winged samaras for distribution on air currents (sometimes called "helicopters" or "spinners").

The teacher can help students explore other surprising types, such as plants that use "explosive" mechanisms to forcibly project their seeds. Still others use attachment to passing animals for dispersal. Finally, there are models of simply hiding seeds in edible nuts or fruit. I did not even name all parachute or winged types (look into elms, catalpas, and tulip poplars if they grow in your area; also the sycamore mentioned is the European, not native American species). Seed collecting trips and internet resources such as those below will help you expand the theme.


https://www.youtube.com/watch?v=j1hRxuy1ezQ
https://www.youtube.com/watch?v=oCwI4bhqRv8
https://www.youtube.com/watch?v=V79s7BKv_t0

The other possibility is to help students learn about how seeds form, as well as other progressions in nature besides old field progression - such as pond, dune etc.

See other films by DeepRiverVisions at https://www.teacherspayteachers.com/Store/Deep-River-Visions
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