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Radda [10]
2 years ago
14

Prairie dogs are burrowing rodents that live in grasslands. What makes the prairie dog a keystone species in the ecosystem?

Biology
2 answers:
Sedaia [141]2 years ago
7 0

OPTIONS:

A) Prairie dogs are the main source of food for wolves and coyotes in the grassland. B) Prairie dogs are the species with the largest number of individuals in the grassland ecosystem. C) They successfully compete with the other herbivores for grass and are a major threat to these species. D) Their tunnels act as conduits for rain water to seep into the ground, thereby promoting the growth of grass.

Answer:

D) Their tunnels act as conduits for rain water to seep into the ground, thereby promoting the growth of grass.

Explanation:

A keystone species is an organisms whose presence and population defines the existence or balance of the ecosystem where they are found. Any negative influence on their population would drastically bring a change and imbalance in an ecosystem. Their presence and activities in the ecosystem is vital and beneficial to other organisms in the ecosystem.

Prairie dogs are keystone species in the grassland ecosystem where they are found because the tunnels they burrow improves soil aeration, fertility as well as water percolation, which encourages the growth of grass in grasslands. Seeds easily germinate also with this improved soil condition.

Rus_ich [418]2 years ago
5 0

Answer:

D) their tunnels act as conduits for rain water to seep into the ground, thereby promoting the growth of grass

Explanation:

I did it on usatest prep

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In the 1890s, Northern elephant seals were hunted almost to extinction. An unknown population of less than one hundred animals m
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Complete question:

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Answer:

In the 1890s, Northern elephant seals were hunted almost to extinction. An unknown population of less than one hundred animals managed to survive on the tiny island of Guadalupe off of Mexico. The current population of over 100,000 is thought to be derived from that tiny remnant population. Compared to the Southern elephant seals (which did not experience such a bottleneck), the Northern elephant seals likely have Lower genetic diversity and Higher levels of genetic diseases.

Explanation:

Genetic drift is the random change that occurs in the allelic frequency of a population through generations. The magnitude of this change is inversely related to the size of the original population. These changes produced by genetic drift accumulate in time. Eventually, some alleles get lost, while some others might set. Genetic drift affects a population and reduces its size dramatically due to a disaster or pressure-bottleneck effect- or because of a population split -founder effect-.

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