Define what is meant by an ecosystem.
Define what is meant by a niche.
State the name of the sampling method used.
Biodiversity may be measured at several different levels. Identify the levels of biodiversity that this sampling technique measured and the levels that it did not measure.
Table 2.1 gives the percentage change in abundance of some of the seaweeds, invertebrates and birds found on the beaches of Hawadax Island. Use Table 2.1 to state the genus name of one organism whose abundance has increased.
Seaweeds were formerly regarded as plants but are now placed in the kingdom Protoctista. Outline the characteristics of the kingdom Protoctista that are shown by seaweeds.
To evaluate how successful the Hawadax Island restoration project was, the ecologists collected data from other islands close to Hawadax Island. Some islands had never had rats (rat-free islands) and had a healthy ecosystem. Other islands still contained rats (rat-occupied islands) and had a disrupted ecosystem. Table 2.2 shows the percentage differences in the abundance of organisms in rat-free islands compared with rat-occupied islands. Using Table 2.1 and Table 2.2, suggest and explain how the removal of rats has restored the ecosystem on Hawadax Island.