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.
An insect bite on the face produces a break in the skin which introduces the normal skin flora (usually <em>Staphylococcus </em>and <em>Streptococcus</em>) to the sterile subcutaneous tissue causing inflammation. The inflammation of the subcutaneous tissue is called cellulitis. Since the infection is in the face, then it can travel from the infected site to the meninges through the cavernous sinuses and cause bacterial meningitis.
In biomes the species community undergoes certain changes in evolution and growth in order to reach the climax.
Explanation:
An alternative stable state is one which suggests the discrete states are sperate by an ecological threshold and in opposition to the ecosystem that is changing and thereby stating that the ecosystem can exist in a variety of alternative state.
The first species after origin grows develops and then declines. This community of species may be disturbed in middle such as by a fire or flood and forms the secondary community which is more diamine and resistant. The changes are known as seres in biomes.
Species with lower resilience have less chance to survive.
Explanation
The resilience rate means to recover after destruction. The species having a higher rate of resilience recover fast when undergoing any damage hence have higher chance to survive. The species with lower resilience rate can collapse as a result of any damage to species by any internal factor such as disease or external factors such as food or climate change.
