Controlling Invasive Species A species that has moved into an ecosystem where it was previously unknown is an invasive species An invasive species can occur naturally as a result of a species migra...
Assisted Reproduction Endangered mammals tend to have small and isolated populations Small populations are prone to inbreeding and inbreeding depression Inbreeding depression is the reduction in fi...
Methods of Conservation An endangered species is a species that is being threatened with extinction Conservation of endangered species can be approached in several different ways Ideally a species ...
Reasons for Maintaining Biodiversity Biodiversity is the range and variety of genes, species and habitats within a particular region It is made up of three components: Genetic diversity Species div...
Reasons for Extinction Extinction is when a species comes to an end or dies out Extinction is a natural biological process that happens on planet earth and studies of fossils and ancient DNA have s...
Simpson's Index Once the abundance of different species in an area has been recorded the results can be used to calculate the species diversity or biodiversity for that area Species diversity looks...
Spearman's Rank Correlation If there is an apparent relationship between two variables but the data does not show a normal distribution, Pearson’s linear correlation coefficient should not be used ...
Pearson's Linear Correlation When recording the abundance and distribution of species in an area different trends may be observed Sometimes correlation between two variables can appear in the data ...
Testing for Distribution & Abundance The distribution of a species describes how it is spread throughout the ecosystem The abundance of a species is the number of individuals of that species Th...
