Biodiversity in an area can be measured at several levels, including species diversity, genetic diversity and ecological diversity. Species diversity can be measured by finding the number of different species and the relative ............................................. of the different species in a given area. Using this information, species diversity can be estimated with the ............................................. index of diversity. Organisms belonging to the same species can show considerable genetic diversity even though they have the same ............................................. . This is because they may have different combinations of ............................................. . The greater the genetic diversity, the greater the ability of a species to ............................................. to a changing environment. Ecological diversity measures the number and range of different ecosystems and ............................................. within a given area.
Calculate the increase rate in the number of endangered species from 2007 to 2019. Show your working. Give your answer to the nearest whole number. rate of increase = ............................................. per year
In 2019, more fish species were listed as endangered than mammal species. Suggest reasons why the number of endangered fish species is higher than the number of endangered mammal species.