Unit 9 Flashcards
what is abundance
abundance is a measure of how common something is in an area such as its population size.
what is a community
all the organisms of different species that live in a habitat
what are abiotic factors
non living elements of an ecosystem, such as climate temperature water and soil type
what is a quadrat
a square frame of a known area used for sampling the abundance and distribution of slow or non moving organisms
what are biotic factors
biotic factors are the organisms in an ecosystem that effect other living organisms
what is eutrophication
eurtrophication is the addition of more nutrients to an ecosystem than it normally needs for example this can happen when to much fertiliser is added to a field.
what is food security
food security means having access to enough safe and healthy food at all times
