Most individuals in populations are clumped. Semelparous means only one reproductive event during the life span of the individual. Sampling populations provides an absolute measure of population size.
Sponges show modular growth.
Two populations with the same density may not show the same pattern of dispersion. Numbers in the two populations will increase at the same rate. Both populations will go to extinction. A strawberry plant produces many daughter plants, three of which become independent of the mother plant. All plants are different ramets.