10 Population Dynamics â¢â¯Metapopulations A metapopulation is a population of populations. Metapopulations Metapopulations âspatially isolated populations that are linked by the dispersal of individuals. Metapopulations are characterized by repeated extinctions and colonizations.
Osteopenia is a condition in which bone mineral density is lower than normal. It is considered by many doctors to be a precursor to osteoporosis.ike osteoporosis, osteopenia occurs more frequently in post-menopausal women as a result of the loss of estrogen. It can also be exacerbated by lifestyle factors such as lack of exercise, excess consumption of alcohol, smoking or prolonged use of glucocorticoid medications.
1 Amenorrhea is a condition in which there is an absense of menstrual periods in a woman. There are two types of amenorrhea, 1) primary and 2) secondary.  Osteopenia is a bone condition characterized by bone loss that is not as severe as in osteoporosis.