ecology please and thank you need help with question 4 1 1,200 1,000 800 S 600 4

Question

ecology please and thank you need help with question 4

1

1,200 1,000 800 S 600 400 200 200 400 800 1,000 1,200 Precipitation (mm) 4. Large areas of western North America have also been invaded by an annual grass commonly Known as "cheatgrass" (Bromus tectorum). Once established, invasive cheatgrass can increase the risk of wildfires because of the extensive, continuous litter layer it creates. This litter allows fire to spread in a manner that bare patches of soil and biocrusts common to drylands would not have supported prior to grass invasion. Because the grass is an annual, it returns rapidly after fire to promote an ongoing cycle with high risk of repeated burning. Given the figure below, what potential effect does cheatgrass invasion have on aboveground carbon stocks in shrub- invaded grasslands? Shrub encroachment Time First fire Subsequent fire

Explanation / Answer

The cheat grass invasion on the above ground carbon stocks in shrub invaded grasslands has the potential of burning the place repeatedly. With the repeated burning, it is going to encroach the place and reduce the number of native shrubs. The invasion by the cheat grass leads to reduction in the above ground carbon stocks that is located in the shrublands

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