NPP Graphs

Based upon Table 1 the influence of grazing on aboveground NPP in a year with average rainfall has a net negative effect compared to NPP without grazing especially in low nutrient areas. There was not much of a difference in high nutrient areas when comparing grazing and no grazing, but there is a significant difference in low nutrient areas. For Table 2 the influence of grazing on NPP has a noticeable decrease in effect for both low and high nutrient fertility areas. The net primary production is clearly positively impacted by areas without grazing. Table 3 shows a negative influence on low nutrient areas where there is grazing. However, there is a positive effect on NPP when there is grazing in high nutrient areas. Overall when comparing the three tables, grazing tends to have a net negative effect on NPP. Even when grazing produces a high NPP value no grazing usually still produces a relatively high NPP. As rainfall increases the NPP tends to increase for the most part across all scenarios. However, when there is less rainfall grazing seems to have more of a negative effect on NPP. The one outlier is when there is low rainfall and grazing in high nutrient sites there is a surprisingly high NPP value.