Exam 7 part 5

Question 1

Habitat fragmentation

Answer 1

one of the most pervasive form of habitat degradation, breakup of large, contiguous areas of natural habitat into small isolated pieces

Question 2

Why is habitat fragmentation concerning

Answer 2

reduce habitats to a size that is too small to support some species, reduces ability of individuals to disperse from one habitat to another (inbreeding depression, loss of alleles due to genetic drift) and creates edge habitat which have low biomass

Question 3

exotic

Answer 3

non-native

Question 4

invasive

Answer 4

damaging

Question 5

Dominant threat to marine species

Answer 5

overexploitation

Question 6

pollution

Answer 6

pharmaceuticals in human urine get in the water, greenhouse gases, pesticide and herbicides get magnified in the food chain, nutrient runoffs can cause eutrophication

Question 7

Climate change makes

Answer 7

the oceans acidic, precipitation patterns change, severity of extreme weather, rising sea levels

Question 8

Global warming

Answer 8

increase in the average temperature of the planet

Question 9

global climate change

Answer 9

the sum of all the changes in the local temperature and precipitation patterns that result from global warming

Question 10

Explain the greenhouse effect

Answer 10

solar radiation penetrates atmosphere, some is reflected out and some is absorbed warming the earth, heat is emitted as infrared radiation and is lost in space or retained in atmosphere warming it

Question 11

Seed banks

Answer 11

provide long term storage and protect loss of genetic diversity

Question 12

Ex situ conservation

Answer 12

reintroduction via the preservation of species in zoos, aquaria, ranches, and botanical gardens

Question 13

Wildlife corridors

Answer 13

encourage gene flow and allow areas to be recolonized

Question 14

ecotourism

Answer 14

assumes that local people and governments will profit more in the long term by tourism than in short term by activities like logging