Question 82 pts You work as an ecologist in the Willamette National Forest. Part

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Question 82 pts

You work as an ecologist in the Willamette National Forest. Part of your annual scientific routine is to complete a survey of plant species in the forest and to estimate their biomass production. This year you notice that there are 5% fewer species and there is approximately 15% less plant biomass. Why might this be the case?

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Question 92 pts

Which type of organism below would you expect to be the most diverse (species-rich) in a tropical forest like Monteverde, Costa Rica?

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Question 102 pts

In the below graph, the Y-axis shows hatching failure rate and the X-axis shows the population size of different species of birds.

If Inbreeding causes hatching failure in birds, which species is most likely to suffer from inbreeding depression?

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Question 112 pts

Jaguars are uncommon even in areas where they have healthy populations, and they typically have very large home ranges. One of the densest concentrations of jaguars in the world can be found at Tortuguero National Park in Costa Rica, which is a large nesting area for several species of sea turtles. Jaguars are important predators of adult sea turtles when they come to lay their eggs, and of the eggs themselves. How can we explain all of these facts?

SELECT ALL THAT APPLY (You may need to select more than one answer)

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Question 122 pts

Typically when beavers are lost from a community:

a replacement species with a similar niche quickly colonizes the area and the community remains relatively unchanged

Will rate when all are answered.

A trophic cascade because of the loss of an apex predator oA (lbis) 40 · yB (Jay) 10 C(Warbler) 10 100 1000 10,000 100,000 Population size

Explanation / Answer

Answer 82.) Option B.)A trophic Cascade because of increase of Apex predator

Answer 92.)option a.) Orchids

Answer 102.) Option a.) Ibis

Answer112.) Option b.) c.) & d.

Answer122.) option a.) Species diversity in the community will decrease

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