Question

step 3 — connecting to earth’s biodiversity
using your ideas from steps 1 and 2:

• explain why amphibian declines serve as a warning about broader environmental threats to earth’s biodiversity.

Explanation:

Amphibians have permeable skin, relying on clean water and air. Their decline signals habitat loss, pollution, climate change, or disease—threats that also impact other species. As indicator species, their sensitivity to environmental changes (e.g., pollution in water/air, habitat fragmentation) means their decline reflects broader ecosystem stress, warning of risks to biodiversity (e.g., loss of species interactions, ecosystem services).

Answer:

Amphibians are sensitive indicator species: their permeable skin makes them vulnerable to pollution, habitat loss, climate change, and disease. Their decline signals these threats are harming ecosystems, as these stressors also impact other species (e.g., via disrupted food webs, lost habitats). Thus, amphibian declines warn of broader risks to Earth’s biodiversity (e.g., species extinctions, reduced ecosystem resilience).