Topic vocabulary

Nature & Animals

Band 7+

The full list of 20 words in this set. Open any word for its pronunciation, collocations, a band 8 sentence and the mistakes Vietnamese learners make.

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20 words

  1. 1

    biomenoun/ˈbaɪəʊm/

    a major ecological community type defined by climate and predominant vegetation

    Tropical rainforests and deserts are different biomes with distinct climates.

  2. 2

    nichenoun/niːʃ/

    the role or position of an organism within its environment, including how it gets its food and interacts with others

    Each species occupies a specific ecological niche in the forest community.

  3. 3

    anthropogenicadjective/ˌænθrəpəˈdʒɛnɪk/

    caused by or resulting from human activity

    The report links rising temperatures to anthropogenic greenhouse gas emissions.

  4. 4

    ariditynoun/əˈrɪdɪti/

    the state of being very dry; lack of moisture over a long period

    The aridity of the region prevents intensive crop cultivation.

  5. 5

    permafrostnoun/ˈpɜːməfrɒst/

    ground (soil or rock) that remains permanently frozen for at least two consecutive years

    Thawing permafrost can release large amounts of methane.

  6. 6

    salinizationnoun/ˌsælɪnaɪˈzeɪʃən/

    the process by which water-soluble salts accumulate in the soil, often reducing fertility

    Excessive irrigation without drainage often leads to salinization of arable land.

  7. 7

    Anthropocenenoun/ˈænθrəpəˌsiːn/

    the proposed geological epoch marked by significant human impact on Earth's geology and ecosystems

    Many scientists argue that the Anthropocene began with the Industrial Revolution.

  8. 8

    keystoneadjective/noun/ˈkiːstəʊn/

    having a disproportionately large effect on its environment relative to its abundance (often used in 'keystone species')

    Sea otters are considered a keystone species because they control sea urchin populations.

  9. 9

    mitigationnoun/mɪtɪˈɡeɪʃ(ə)n/

    actions or policies that reduce the severity or harmfulness of something (e.g. climate change)

    International cooperation on mitigation is essential to limit global warming.

  10. 10

    biospherenoun/ˈbaɪəʊsfɪə(r)/

    the global zone of life on Earth, including land, oceans and the lower atmosphere

    Human activities are changing the biosphere faster than many scientists expected.

  11. 11

    sequestrationnoun/ˌsiːkwɛˈstreɪʃən/

    the process of storing a substance (especially carbon dioxide) so it is removed from the atmosphere for a long period

    Carbon sequestration by forests can offset some fossil fuel emissions.

  12. 12

    estuarynoun/ˈɛstjʊəri/

    the wide part of a river where it flows into the sea, often a mix of fresh and salt water and biologically rich

    The estuary supports many migratory birds every winter.

  13. 13

    biomagnificationnoun/ˌbaɪəʊˌmæɡnɪfɪˈkeɪʃ(ə)n/

    the increasing concentration of toxins in organisms at higher trophic levels in a food chain

    Mercury undergoes biomagnification, which is why large predatory fish often contain the highest levels.

  14. 14

    eutrophicationnoun/juːˌtrɒfɪˈkeɪʃ(ə)n/

    the process by which a body of water becomes overly enriched with nutrients, causing dense plant growth and oxygen depletion

    Eutrophication from agricultural runoff has damaged many lakes.

  15. 15

    trophicadjective/ˈtrɒfɪk/

    relating to feeding or nutrition in ecological food chains (as in 'trophic level')

    Changes at one trophic level can cascade to others.

  16. 16

    resiliencenoun/rɪˈzɪljəns/

    the ability of a system, community, or organism to recover after disturbance

    Community resilience after the flood was remarkable; most residents rebuilt within months.

  17. 17

    sedimentationnoun/ˌsɛdɪmenˈteɪʃ(ə)n/

    the process by which particles settle out of water or air and accumulate as sediment

    Increased erosion leads to more sedimentation in rivers and reservoirs.

  18. 18

    successionnoun/səkˈsɛʃ(ə)n/

    the gradual process by which ecosystems change and develop over time, especially after disturbance

    After the fire the area underwent secondary succession, with grasses colonising first.

  19. 19

    decompositionnoun/ˌdiːkəmˈpəʊzɪʃ(ə)n/

    the process by which organic matter is broken down into simpler substances by organisms or chemical processes

    Warm, moist conditions accelerate the decomposition of leaf litter.

  20. 20

    stewardshipnoun/ˈstjuːədʃɪp/

    the responsible management and care of something, especially the environment or resources

    Corporate environmental stewardship includes reducing waste and supporting restoration projects.

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