C.3 Impacts of humans on ecosystems

Describe how ingested plastics can cause problems to marine birds.

Describe how ingested plastics can cause problems to marine birds.

Describe how ingested plastics can cause problems to marine birds.

Explain how pesticides may undergo biomagnification in the lake.

Explain how pesticides may undergo biomagnification in the lake.

Explain how pesticides may undergo biomagnification in the lake.

Suggest a method to limit the impact of F. silvestris on native species.

Suggest a method to limit the impact of F. silvestris on native species.

Suggest a method to limit the impact of F. silvestris on native species.

Outline three issues arising from the release of pollutants into the environment.

Outline three issues arising from the release of pollutants into the environment.

Outline three issues arising from the release of pollutants into the environment.

The map shows an area of the Pacific Ocean characterized by exceptionally high concentrations of plastics and other debris that have been trapped by the currents of the North Pacific Gyre.

Outline one consequence of marine plastic pollution.

The map shows an area of the Pacific Ocean characterized by exceptionally high concentrations of plastics and other debris that have been trapped by the currents of the North Pacific Gyre.

Outline one consequence of marine plastic pollution.

The map shows an area of the Pacific Ocean characterized by exceptionally high concentrations of plastics and other debris that have been trapped by the currents of the North Pacific Gyre.

Outline one consequence of marine plastic pollution.

Using one example, outline biological control of an invasive alien species.

Using one example, outline biological control of an invasive alien species.

Using one example, outline biological control of an invasive alien species.

Define invasive alien species.

Define invasive alien species.

Define invasive alien species.

Outline three ways in which a named environmental disturbance can impact an ecosystem.

Outline three ways in which a named environmental disturbance can impact an ecosystem.

Explain what is meant by competitive exclusion, with respect to a named example of an invasive species.

Explain what is meant by competitive exclusion, with respect to a named example of an invasive species.

The diagram shows the copper concentration (μg g^–1) in the seaweed Porphyra umbilicalis collected along the shoreline in Arklow, Ireland.

[Source: reprinted by permission from Springer Nature: Helgoländer Meeresuntersuchungen,
Problems in the assessment of heavy-metal levels in estuaries and the formation of a pollution index,
D L Tomlinson, et al., 33, issue 1, pages 566–575. Copyright 1980]

Explain how the copper found in these seaweeds could affect the birds living in Arklow town.

The diagram shows the copper concentration (μg g^–1) in the seaweed Porphyra umbilicalis collected along the shoreline in Arklow, Ireland.

[Source: reprinted by permission from Springer Nature: Helgoländer Meeresuntersuchungen,
Problems in the assessment of heavy-metal levels in estuaries and the formation of a pollution index,
D L Tomlinson, et al., 33, issue 1, pages 566–575. Copyright 1980]

Explain how the copper found in these seaweeds could affect the birds living in Arklow town.

Explain how the levels of the Caesium (Cs) radioisotopes could have accumulated in the tissues of these fish.

Explain how the levels of the Caesium (Cs) radioisotopes could have accumulated in the tissues of these fish.

Explain how the levels of the Caesium (Cs) radioisotopes could have accumulated in the tissues of these fish.

Compare and contrast the effects of the predators on the population of the mussels.

Compare and contrast the effects of the predators on the population of the mussels.

Compare and contrast the effects of the predators on the population of the mussels.

Identify how the pattern in mammals is different from reptiles and birds.

Identify how the pattern in mammals is different from reptiles and birds.

Identify how the pattern in mammals is different from reptiles and birds.

Describe how invasive species such as F. silvestris can have a significant impact on native species.

Describe how invasive species such as F. silvestris can have a significant impact on native species.

Describe how invasive species such as F. silvestris can have a significant impact on native species.

Explain the consequences of biomagnification.

Explain the consequences of biomagnification.

Explain the consequences of biomagnification.

Sea urchins are destroying the giant kelp alga (Macrocystis pyrifera) marine forests of South East Australia. Suggest a reason that sea urchins might be an invasive species in this environment.

Sea urchins are destroying the giant kelp alga (Macrocystis pyrifera) marine forests of South East Australia. Suggest a reason that sea urchins might be an invasive species in this environment.

Sea urchins are destroying the giant kelp alga (Macrocystis pyrifera) marine forests of South East Australia. Suggest a reason that sea urchins might be an invasive species in this environment.