In an ecological assessment of a coastal estuary impacted by maritime trade, marine biologists documented a total of 4,375 non-native species. Among these recorded non-native species, 1,514 were classified as invasive species that actively disrupt local trophic webs, while the remainder were non-invasive.
Suggest what is meant by the term non-native species.
Calculate the percentage of these recorded non-native species that are classified as invasive. Give your answer to one decimal place. Show your working.
44 exam-style questions on Edexcel IGCSE Biology Human influences on the environment. Each one has a worked solution and a mark scheme showing where the marks go.