DP Biology (last assessment 2024)
Question 18M.3.SL.TZ2.12c
| Date | May 2018 | Marks available | [Maximum mark: 3] | Reference code | 18M.3.SL.TZ2.12c |
| Level | SL | Paper | 3 | Time zone | TZ2 |
| Command term | Outline | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 3]
18M.3.SL.TZ2.12c
One challenge associated with establishing nature reserves is concerns about edge effects. The graph shows that some edge effects in the Amazon rainforest are detected quite far in from the edge.
(c)
Outline how reserve size and shape can impact edge effects.
[3]
Markscheme
a. small reserve has greater edge «relative to area therefore more edge effects»
b. changing shape can change edge length/perimeter for a given area «changing edge effects»
c.«at the edge there is» interaction of two communities
OR
different species may be better at invading into neighbouring community
OR
edge favors disturbance-adapted species
OWTTE.
Examiners report
