What type of survivorship curve do R strategists have?
The Type III or C curve, is typically followed by r-strategist organisms. They exhibit high mortality at the early stages of their life. However, if they grow to maturity, then their chances of survival drastically increases.
Can plants be r strategists?
Even plants are capable of r- and K-selected reproductive strategies. Wind pollinated species produce much more pollin that insect pollinated ones, for example, because the pollin has to be carried at random by the wind to a receptive female flower.
What type of survivorship curve do plants have?
Trees, marine invertebrates, and most fish have a Type III survivorship curve. In a Type III curve, very few organisms survive their younger years.
Do plants have a survivorship curve?
This is typical of species that produce many offspring. Few survive initially, but once individuals reach a critical size, their risk of death remains low and more or less constant. This appears to be the most common survivorship curve among animals and plants in nature.
Is a whooping crane R or K-selected?
Not much is known about the learning that takes place in this K-selected species over the almost one year that the young whooping crane colt remains with its adult parents.
What is the most common survivorship curve?
The Type I curve, illustrated by the large mammals, tracks organisms that tend to live long lives (low death rate and high survivorship rate); toward the end of their life expectancies, however, there is a dramatic increase in the death rate.
What are the 3 types of survivorship curve?
There are three types of survivorship curves. Type I curves depict individuals that have a high probability of surviving to adulthood. Type II curves depict individuals whose chance of survival is independent of age. Type III curves depict individuals that mostly die in the early stages of their life.
What is Type 3 survivorship curve?
In survivorship curve. The Type III curve, characteristic of small mammals, fishes, and invertebrates, is the opposite: it describes organisms with a high death rate (or low survivorship rate) immediately following birth.
Which is the most common survivorhip curve in nature?
This is typical of species that produce many offspring. Few survive initially, but once individuals reach a critical size, their risk of death remains low and more or less constant. This appears to be the most common survivorship curve among animals and plants in nature. Figure 4.7 Mortality and survivorship in the life cycle of Phlox drummondii.
Are there organisms that neither fit the K or are strategist curve?
In between, there are some organisms like birds, mice, rabbits, butterflies, etc. that neither fit the k-, or r-strategist type of survival. They lie in a zone where their chances of survival remain the same throughout their lifespan. Such organisms follow the Type II or B curve of survivorship.
Which is an example of an are strategist species?
All of the offspring rarely live to adulthood Examples of r-strategist species are dogs, cats, insects, and fish. This natural tendency is visible when you look at a survivorship curve, which is a curve that depicts the number of survivors of a particular species at each stage of their life.
Where do K strategists live on the population growth curve?
The r/k selection theory explains whether a species chooses to be a k-strategist or an r-strategist. K-strategists “live” near the carrying capacity k on the population growth curve, under stable environment conditions. They have limited resources.