BIO 100 Quiz: ap10_biology_q4.pdf
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Cannot simply list the organisms depicted (shrubs gymnosperms angiosperm hardwoods: biodiversity increases (plants, animals, decomposers). Increase in plant stratification (increased layering of plants; e. g. , canopy, understory): more niches/habitats formed (plants, animals, decomposers), pioneer plant species dominants (more shade-tolerant plants emerge). Other: shift from more opportunistic (r) to more equilibrium (k) species. Increase in producer diversity brings about increase in consumer diversity. Question 4 (continued) (b) describe and explain three changes in abiotic conditions over time that lead to the succession, as shown in the diagram above. (6 points maximum) It is not enough to say the condition (e. g. , light, temperature, humidity) changes. The description/ explanation must be of a directional change (increase/decrease) in abiotic type that would lead to the changes shown in the diagram. The following list is not exhaustive. (2 points maximum per abiotic condition i. e. , any two cells from a single row below) conditions and must be of a.
