How can competition affect the rates of immigration and emigration?
Competition increases when density increases. When resources like food, space, and water become limited individuals in a population compete for the resources. A population stops increasing when the number of births is less than the number of deaths or when emigration exceeds immigration.
What does the range of a population tell you that density does not?
Chapter 5 Study Guide Biology Crisp
|what does the range of a population tell you that density does not?||the areas inhabited by a population|
|what tells you population density?||the number of bacteria per square millimeter|
|the movement of organisms into a given area from another area is called||immigration|
How does the availability of resources affect whether a populations growth is exponential or logistic?
Exponential population growth: When resources are unlimited, populations exhibit exponential growth, resulting in a J-shaped curve. When resources are limited, populations exhibit logistic growth. In logistic growth, population expansion decreases as resources become scarce.
How does the availability of resources affect population growth?
When there is plenty of food and other resources, organisms can easily reproduce, so the birth rate is high. As the population increases, the food supply, or the supply of another necessary resource, may decrease. When necessary resources, such as food, decrease, some individuals will die.
How do limiting factors affect population?
Limiting factors include a low food supply and lack of space. Limiting factors can lower birth rates, increase death rates, or lead to emigration. Limiting factors determine the carrying capacity of a population. Recall that when there are no limiting factors, the population grows exponentially.
How does an ecosystem sustain life?
In each ecosystem, living creatures, including humans, form a community, interacting with one another and with the air, water, and soil around them. It is the combination of life forms and their interactions with each other and with the rest of the environment that has made Earth a uniquely habitable place for humans.
Why do ecosystems need to be sustainable?
The more sustainable an ecosystem is the better it is for the environment and for people. This is because we need ecosystems to survive – we need nutrients, food, medicine and money to survive and ecosystems provide us with all of these things.
What does Earth offers to human in order to sustain life?
Answer. Answer: Purification of air and water.
Do you think fire is important to sustain life on Earth?
A ground fire burns organic soil. A surface fire moves through grasses, forest litter, and shrubs. The regime concept is vital, because organisms are no more “adapted to fire” (or not) than they are to water: they adapt to a pattern of burning.