Life History Strategies

An organism’s life history is the pattern of growth, development, and reproduction over the course of its life. Since fitness is a measure of the organism’s reproductive success, we know that natural selection will favour the life history strategy that results in the greatest number of offspring that survive to produce offspring of their own. … Continue reading Life History Strategies

Where Do New Species Come From?

A fundamental question in ecology is the question of how the vast diversity of species that we find on this planet originate.   Key to this is the idea of reproductive isolation, or the group of mechanisms which prevent two groups of living organisms from breeding with each other. Reproductive isolation can be subdivided into … Continue reading Where Do New Species Come From?

What is a Species?

The task of classification of organisms has remained a daunting task ever since we humans began to group what we consider to be closely related living beings together.   In the mid 1700s, Swedish botanist, zoologist, and physician Carolus Linnaeus wrote the System Naturae, a way of organizing living beings into a hierarchical fashion. Combined … Continue reading What is a Species?