Passage II
Succession refers to the change in species composition in a given area over ecological time.
Table 1 shows the bird species, the dominant (most common) plants, and the successional time in years (yr) on plots of abandoned farmland studied in Georgia.
The estimated changes in net productivity (grams of organic mass produced per square meter per year [g/m2/yr]) and biomass (kilograms of organic material per square meter [kg/m2]) of plants on abandoned farmland in New York appear in Figures 1 and 2, respectively. Successional time is divided into 3 stages based on the dominant plants.
9. According to Figure 1, total net productivity increased the most during which of the following time periods?
Your Answer is
Correct Answer is C
Explanation
Increase the most is the maximum slope of the line segment. It can be seen from figure 1 that when the abscissa is 14-50, the slope is the largest