Science Homework Help

1. Each of the four numbered words or phrases are reasons that fragmented habitats don’t support biodiversity at the same level as they did before fragmentation. Explain why each leads to lower measures of biodiversity in at most a few sentences (the whole answer should not exceed one page)(4 points each)

1- Initial exclusion

2- Isolation

3- Overcrowding

4- Matrix matters

2. What are the theoretical benefits and disadvantages of creating (maximum 100 words per topic):

1- a single large reserve (4 points)

2- several small reserves (4 points)

3. In this section we considered some non-traditional approaches to “future-proofing” conservation.

A. In a few words, please provide 2 scenarios in which assisted migration could be a critical consideration for conservation of certain species. (3 points each scenario)

B. What is the term for acquisition of beneficial alleles through hybridization of species? (2 points)

4. Is any one of the populations of canids discussed this week at immediate risk of entering an extinction vortex without human intervention? What did you base that assessment on? Answer in less than 100 words. (6 points)

5. A. What does the “50/500 rule” combat in immediate and longer time frames? Answer in one phrase or sentence each. (4 points)

Immediate:

Longer:

B. Does preventing an Allee effect come in closer to 50 or 500? Briefly indicate why. (6 points)

6. In the “Eternal Vigilance” case study, we observed the competition between the barred owl and the spotted owl. List 3 examples of how the barred owl could be managed. From those, choose the most adequate method in your opinion, and briefly justify your choice. (7 points)