Type III species produce many offspring and exhibit little to no parental care. Examples of Type III species include fish and insects. Species that exhibit Type II survivorship have an equal rate of survivorship at all stages of life. According to the graph, which type of survivorship does the songbird exhibit? Type II A songbird has an equal chance of surviving at all stages of its life. Species that exhibit Type III survivorship have a large number of offspring, but many do not survive long enough to reproduce. According to the graph, which type of survivorship does the salamander exhibit? However, after hatching, few of the larvae survive to adulthood. Ī female salamander lays hundreds of eggs at a time. When a population reaches the island's carrying capacity, birth and death rates are relatively equal. At this point, the birth and death rates are Eventually, the population reaches the island's carrying capacity. A population of rodents is introduced on a remote island due to a shipwreck. a density-independent limiting factor.Ī flood is a type of natural disaster that is an example of a density-dependent limiting factor. A population of deer is displaced by a massive flood in their habitat following a severe rainstorm. Competing birds increase the total population depending on the same available resources. High winds knock down a quarter of the trees a competing species moves into the forestĬompetition is a density-dependent limiting factor. Which of these factors would be a density-dependent limiting factor that could decrease the carrying capacity of the ecosystem for the warbler population?Ī competing species moves into the forestĪ builder removes trees for an office park A population of warblers experiences a period of exponential growth. The number of animals leaving the population through deaths and emigration is greater than the number of animals entering the population through births and immigration. Which of these conditions must also be true for the population growth rate to be negative?īirths + deaths immigrations + emigrationsīirths + immigrations deaths + emigrations births + immigrations < deaths + emigrations A population of antelope has a negative population growth rate. Which of these abiotic factors would contribute to a clumped dispersion pattern in an ecosystem? Select all correct answers.Ĭlumped dispersion occurs when conditions force organisms in a population into smaller spaces in order to have the best chance for survival, such as limited shade from the hot sun and scattered watering holes along with prolonged periods of dry weather.
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