Lecture 38. From Genes to Ecosystems

Question 1

What is a benefit of sea grass ?

Answer 1

A keystone species which creates structure and habitat for other species

Question 2

What is the structure of sea grass ?

Answer 2

Has roots flowers, thin cuticle layer, no stomata

Question 3

How can seagrass reproduce ?

Answer 3

Both sexually and asexually

Question 4

How is sea grass pollinated ?

Answer 4

Water pollinated

Question 5

When is seagrass most productive ?

Answer 5

When genetically diverse

Question 6

What does seagrass with higher genetic diversity maintain ?

Answer 6

More biodiversity

Question 7

How do seagrass with genetic diversity recover from climate extremes ?

Answer 7

Much faster than those with less genetic diversity

Question 8

What do ants form at low genetic diversity ?

Answer 8

Form super colonied

Question 9

What does genotypic richness of leaf litter influence ?

Answer 9

Decomposition and nutrient flux community

Question 10

To conserve biodiversity what do we have to conserve ?

Answer 10

Genetic diversity in key stone species and endangered species

Question 11

What is a key element in aquatic systems ?

Answer 11

Phosphorous

Question 12

What type of evolution do sticklebacks have ?

Answer 12

Convergent, repeated evolution

Question 13

What do algae do to defend against rotifer ?

Answer 13

1. Becomes uneatable

2. Clumps up to become to large to eat

Question 14

What is the downside to the algae when defending against rotifers ?

Answer 14

They grow much slower

Question 15

What does genetic diversity allow ?

Answer 15

Adaptation

Question 16

What can some corals do near Ofu islands ?

Answer 16

Live in areas exceeding the critical limit for bleaching (30-35 degrees )

Question 17

What do symbionts not do ?

Answer 17

Change or evolve

Question 18

When corals were swapped to areas they were not used to what happened ?

Answer 18

They acclimatised by changing their patterns of gene expression