Question

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assessment 2 - threats to grasslands
grasslands: conservation & management
5 of 5
which of the following limits the biodiversity of grasslands?
grazing animals
pesticides and fertilizers
loss of topsoil
farming a single variation of a crop

Explanation:

To determine which option limits grassland biodiversity, we analyze each:

• Grazing animals: Can promote biodiversity (e.g., nutrient cycling, plant diversity via grazing pressure).
• Pesticides/fertilizers: Harm non - target species, disrupt ecosystems, reducing biodiversity.
• Loss of topsoil: Impacts plant growth but is more about soil health; less direct on biodiversity compared to pesticides/fertilizers.
• Farming a single crop (monoculture): Affects agricultural biodiversity, but grasslands are natural ecosystems; pesticides/fertilizers directly impact grassland species.

Pesticides and fertilizers introduce toxins, kill beneficial organisms, and alter habitats, directly limiting grassland biodiversity.

Answer:

B. Pesticides and fertilizers