Lecture 28

Question 1

Interspecific interactions are important across many different scales

Answer 1

1) Time (temporal scales)
2) Space (geographic scales)
3) Body size (morphometric scales)

Question 2

Mutualistic relationships can be . . .

Answer 2

SPECIFIC if b/w 2 species

DIFFUSE if b/w groups of species

Question 3

Mycorrhizae (plants & fungi)

Answer 3

• Fungi supply water + nutrients to plants
• plants supply products of photosynthesis (sugar) to fungi
• plants show increased resistance to pathogens
• global association: present in ~80% of plant species
• common mycorrhizal networks transmit water, nutrients, info b/w plants
• communication via biochemical signals changes plant behavior

Question 4

Define functional group

Answer 4

a group of species that perform a similar function in a community