Question 152 pts Banner-tailed kangaroo rats, Dipodomys spectabilis , are rodent

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Question 152 pts

Banner-tailed kangaroo rats, Dipodomys spectabilis, are rodents that feed on seeds and are endemic to the deserts of the southwestern United States. Which of the following is the best description of their ecological niche?

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Question 162 pts

Kelp forests provide a diverse habitat for a wide variety of marine fishes and other species. Sea urchins are major grazers on kelp, with "herds" of grazing urchins having the ability to clear large areas of kelp. Sea otters reduce urchin grazing by feeding on sea urchins. Thus, sea otters can be identified as:

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

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Question 172 pts

See the below map of Argentina. (The equator is north of the country, passing through Ecuador and Brazil.)

Based on what you know about global patterns of species richness, which province would you predict to have the highest gamma diversity in mammals?

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Question 182 pts

Which of the below would be considered an example of market failure?

The ecotourism industry continues to grow in Monteverde, Costa Rica over the next five years and local residents begin to notice an increase in negative impacts of tourism on the environment.

Will rate when all are answerd.

found only in arid habitats Jujuy Salta Formosa Tucumán Chaco Misiones Santiago Catamarcadel Estero La Rioja This way to the equator Santa Fe SnJucordoba Entre Rios San Luis Buenos Mendoza) La Pampa Buenos Aires Neuquén Rio Negro Chubut 45 Santa Cruz

Explanation / Answer

Q1

Endemic species   are the species unique to a definite geographic location such as desert, island ore other defined zone. As all these species in the question are endemic to desert of southwestern united states, hence the best description of these ecological niche are : seed eating rodents that can tolerate the intense heat and dryness in the south west desert. As being endemic, they will be only confined to deserts of southwestern united deserts

Q2

Kelp forests provide a diverse habitat for various species, and these forests are grazed by sea urchins. These sea urchins have ability to clear large areas of kelp but sea otters reduce sea urchins and maintains the ecosystem. Hence sea otters can be identified as A keystone species

Keystone species are species disproportionate of abundance and maintains ecosystem. In above example sea otters reduce the number of sea urchins which have ability to graze and clear large amount of kelp forests hence maintain balance in ecosystem

Q3

Gamma diversity is the diversity of various ecosystems.

Diversity is more at the equator and decreases as we move towards poles. More diversity is found in tropical regions near equator . as moving away from equator, diversity decreases

Tropical> subtropical>temprate> near poles

So looking at the above graph, heighest gamma diversity will be noted in the area near equator

Hence answer will be 1 misiones

   Misiones > entre rios > mendooza> santa cruz

Q4

Air pollution and associated human health impacts from industrial activities in Santiago, Chile becomes so severe that most of the worker population leaves their jobs and moves away from the city for the less polluted countryside'

in the above example as worker population leaves the job, industry will be closed due to lack of workers hen it will demnish and will lose its market

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