| Date | May 2017 | Marks available | 2 | Reference code | 17M.3.SL.TZ1.14 |
| Level | Standard level | Paper | Paper 3 | Time zone | Time zone 1 |
| Command term | Predict | Question number | 14 | Adapted from | N/A |
Question
The Gersmehl diagram below shows the movement and storage of nutrients in a taiga ecosystem.
Predict the possible effect of global warming on the nutrient flow in a taiga ecosystem.
Markscheme
a. increased biomass «with higher temperatures»
b. «so» increased uptake of nutrients from soil «into the biomass»
c. increased decomposition of litter «due to growth of decomposers»
d. «so» increased nutrient composition of soil «L→ S»
e. increased weathering of rocks «increasing minerals in soil»
f. weather changes cause increased runoff from litter/leaching from soil
Examiners report
[N/A]
Syllabus sections
Option C: Ecology and conservation » Option C: Ecology and conservation (Core topics) » C.2 Communities and ecosystems
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