Topic 2.1: Species, Populations Questions

Figure 1 describes two stretches of coast on Kell Island, a made-up island, and the needs of the beach mouse. Suggest one reason why there might be more beach mice on Coast A than on Coast B.

Figure 1 shows the monthly mean temperature and hours of daylight in Nordvik, a made-up northern city. Outline one factor that limits the primary productivity of the parks of Nordvik.

A report describes 'the community living on an old oak tree'. Define the term community.

Figure 1 describes two heathlands in the Marren Hills, a made-up area, and the needs of the sand lizard. Suggest one reason why there might be more sand lizards in Heathland A than in Heathland B.

Figure 1 shows the variables monitored in a grazed and an ungrazed grassland. With reference to Figure 1, identify one biotic and one abiotic factor that were monitored.

Figure 1 is a fact file about Karsden, a made-up industrial city. Outline one factor that limits the primary productivity of the parks of Karsden.

Figure 1 shows the numbers of adult frogs of two species at Lake Mirel, a made-up lake, between 2010 and 2022. A fungal disease killed many tree frogs in 2012. With reference to Figure 1, calculate the percentage increase in tree frog numbers between 2012 and 2022.

Suggest one mechanism by which a human community living in a semi-arid region can appear to exceed the local carrying capacity of its territory without immediate population collapse.

After sea otters were hunted off California, the kelp forests turned into bare rock. Outline what is meant by a trophic cascade.

Grey wolves live across North America, Europe and Asia. About 100 of them live in Yellowstone National Park in the USA. Distinguish between a population and a species, using wolves as an example.

Figure 1 describes two woodlands near Stoll, a made-up town, and the needs of the dormouse. Suggest one reason why there might be more dormice in Woodland A than in Woodland B.

Figure 1 is a map of the green spaces in Portlan, a made-up coastal town. Identify one distribution pattern of the green spaces in Portlan.

Conservationists on Isla Moreno want to know whether their recovery programme is working (Figure 1). Identify one reason why it is difficult to determine the exact population of the Echo parakeet.

The Rodrigo fruit bat of Isla Alta is endangered. Figure 1 is a fact file on the species. Identify one reason why it is difficult to determine the exact population of the Rodrigo fruit bat.

Figure 1 shows the numbers of two deer species in Halden Forest Reserve, a made-up reserve, between 2006 and 2018. A very cold, snowy winter in 2008 killed many deer. With reference to Figure 1, calculate the percentage increase in roe deer numbers between 2008 and 2018.

Red and grey squirrels both eat hazelnuts and acorns in British woodlands. Outline what is meant by niche overlap and state one likely consequence for the two species.

A group of students is planning a study of the organisms living in a rocky shore pool. State two abiotic factors that could affect the distribution of organisms in the pool.

A lake has two fish species that both feed mainly on small zooplankton (tiny floating animals) near the surface during the day. Suggest one change in resource use that could reduce competition between the fish.

A report says that sustainability is a natural property of ecosystems. Define the term sustainability.

Figure 1 shows the variables monitored in two stretches of a stream. With reference to Figure 1, identify one biotic and one abiotic factor that were monitored.