Toucans present Toucans absent 30- 80- 25- 20- 15- 10- 60- 40- 5- 20- 0- 8. 8 10 12 14 10 12 14 Seed diameter (mm) Number of seeds

Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN:9781337408332
Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Chapter29: Life Cycles Of Flowering Plants
Section: Chapter Questions
Problem 12SQ: Exposure to _______ can trigger seed germination. a. light b. cold c. smoke d. all can be triggers
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a.Toucans can eat fruits with large seeds because their large bills can open very wide. Most other birds in the same forest can only eat small seeds. Ecologist Mauro Galetti and his colleagues measured the seed sizes of palms in forest fragments with and without toucans. The graphs show two of the forest populations they studied. What is the take-home message of the data?

b.Large seeds carry more resources than small seeds and tend to have a higher rate of survival, especially after being dispersed by a bird. Predict how the local extinction of toucans will affect the palm population over time.

 

Toucans present
Toucans absent
30
25-
80-
20-
60-
15-
40-
10-
20-
5-
8
10
12
14
8
10
12
14
Seed diameter (mm)
Number of seeds
Transcribed Image Text:Toucans present Toucans absent 30 25- 80- 20- 60- 15- 40- 10- 20- 5- 8 10 12 14 8 10 12 14 Seed diameter (mm) Number of seeds
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