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Q5.14. Recall that in the big Yellowstone fires lodgepole pines burned and then

ID: 220638 • Letter: Q

Question

Q5.14. Recall that in the big Yellowstone fires lodgepole pines burned and then grew back within several decades. With respect to fire, are lodgepole pines resistant and/or resilient? Lodgepole pines are resistant Lodgepole pines are resilient Lodgepole pines are both resistant and resilient Lodgepole pines are neither resistant or resilient Q5.15. Redwood trees (Sequoia sempervirens have more biomass than any other plant species in western redwood forests. They greatly impact the other plant and animal species that live in these forests. If removed, most understory plants and their associated herbivores could not survive. Are redwood trees keystone species? Why or why not? Yes, the redwood tree is a keystone species because it has a large impact on most understory plants in the community Yes, the redwood tree is a keystone species because its removal would result in the loss of herbivores in the community No, the redwood tree is not a keystone species because its proportional biomass is high No, the redwood tree is not a keystone species because its impact on the community isn't much greater than that of other species

Explanation / Answer

Question Answer remarks 5.14 b since they catch fire, thus they are not resistant. However, they have the ability to grow back-- thus are resilient. 5.15 a yes, since as a keystone species they are essential for the survival of other species. 5.18 c food web C is most stable as it has maximum links amongst various species. More links means more complex and thus more stable.