試題詳解

9. During the secondary succession in the forest, with time the number of woody species________.
(A) decreases, being highest at the initial stages of the succession.
(B) increases and then levels off, being highest in the climax vegetation.
(C) does not change - pioneer species at the early stage of the succession are slowly replaced by the same number of climax species in the late stage.
(D) is unpredictable and depends on the forest system under study.
(E) none of the above.