# Ecology Test VI

Bio-geochemical Cycles
Quiz I

Ecosystem
Problem set I

Ecology Test
Test 1   Test 2
Test 3   Test 4
Test 5   Test 6
Test 7   Test 8
Test 9   M/C

Energy Calculation
Quiz 1   Quiz 2

Human Ecology
Quiz 1   Quiz 2
Quiz 3

Population Dynamics
Quiz 1   Quiz 2
Quiz 3   Quiz 4
Quiz 5   Quiz 6
Review

PART A: Easy Stuff:

1. Name three biotic factors. [5]

2. Name three density dependent population growth regulators. [5]

3. Compare R and K organisms on the basis of four characteristics. [10]

4. The data in a biologist's field notebook tells you that one day they caught and tagged a bunch of fish - but the bozo forgot to say how many were caught or tagged!!! The next entry however shows a result which says they estimated the total population to be 20,000. The Ministry of Natural Resources Rules for Field Biologists requires every study to capture at least 100 fish in each study. How many fish in the recapture were marked? [10]

5. A forest measures 2 km by 3 km. A particular organism top level is on the fourth trophic level up from the photosynthesising plants. [25]
a) Draw and label the food pyramid. Give some names to the organisms.
b) If the plants produce 26000 kJ•m-2•y-1, and the fourth level organism requires 700 kJ per week, how many of these organisms can be sustainably supported by the forest?

PART B: Harder Stuff - Worth 60 % of the test.

1. Draw the nitrogen phosphorous carbon biogeochemical cycles - all on the same diagram (overlay them). Ose only these processes: excretion, respiration, photosynthesis, decomposition, nitrogen fixation, decomposition and solution. Draw arrows for these processes. Your job now is to draw in the plants, animals, and other things which are one each end of these arrows or processes. [10]

2. Succession is:
a) a normal process.
b) an abnormal process.
c) a normal end-product.
d) an abnormal end-product.
e) none of the above.