Search results
Results from the WOW.Com Content Network
Definition. A relict (or relic) plant or animal is a taxon that persists as a remnant of what was once a diverse and widespread population. Relictualism occurs when a widespread habitat or range changes and a small area becomes cut off from the whole. A subset of the population is then confined to the available hospitable area, and survives ...
Competition is a density dependent effect, and scramble competition is no exception. Scramble competition usually involves interactions among individuals of the same species, which makes competition balanced and often leads to a decline of population growth rate as the amount of resources depletes.
Natality in population ecology. Natality in population ecology is the scientific term for birth rate. Along with mortality rate, natality rate is used to calculate the dynamics of a population. They are the key factors in determining whether a population is increasing, decreasing or staying the same in size. Natality is the greatest influence ...
In general, population growth roughly follows one of these trends: [1] Logistic growth leveling out at some carrying capacity. Overshoot ("boom" and "bust" cycles). Oscillation at or below the carrying capacity. Insect pest growth rates are heavily influenced by temperature and rainfall, among other variables.
Insulin. Insulin is a peptide hormone containing two chains cross-linked by disulfide bridges. Insulin ( / ˈɪn.sjʊ.lɪn /, [5] [6] from Latin insula, 'island') is a peptide hormone produced by beta cells of the pancreatic islets encoded in humans by the insulin ( INS) gene.
A population pyramid (age structure diagram) or " age-sex pyramid " is a graphical illustration of the distribution of a population (typically that of a country or region of the world) by age groups and sex; it typically takes the shape of a pyramid when the population is growing. [1] Males are usually shown on the left and females on the right ...
A functional response in ecology is the intake rate of a consumer as a function of food density (the amount of food available in a given ecotope ). It is associated with the numerical response, which is the reproduction rate of a consumer as a function of food density. Following C. S. Holling, functional responses are generally classified into ...
Minimum viable population ( MVP) is a lower bound on the population of a species, such that it can survive in the wild. This term is commonly used in the fields of biology, ecology, and conservation biology. MVP refers to the smallest possible size at which a biological population can exist without facing extinction from natural disasters or ...