Biodiversity / Insects — UPSC Mains Model Answer

Insects such as cicadas (sound-producing herbivores that aerate soil during nymph stages), froghoppers (sap-feeding insects producing protective spittle masses), and pond skaters (surface-tension exploiting predators in freshwater systems) illustrate the breadth of ecological niches insects occupy. Each species performs distinct functions — nutrient cycling, prey regulation, and energy transfer — that sustain ecosystem stability.

Aquatic insects like pond skaters serve as bioindicators of freshwater quality; their presence or absence signals pollution levels and hydrological integrity. Monitoring such indicator species provides cost-effective, field-deployable data for environmental impact assessments under regulatory frameworks governing wetland and river management.

Habitat fragmentation, pesticide overuse, light pollution, and climate-induced phenological mismatches are accelerating insect population declines globally. This 'insect apocalypse' threatens food security directly, given that a significant share of crop species depend on insect pollination, and indirectly through collapse of bird and amphibian populations that rely on insects as prey.

India's Biological Diversity Act and National Biodiversity Action Plan provide a framework for insect conservation, yet implementation remains weak due to limited taxonomic expertise and inadequate monitoring infrastructure. Integrating insect conservation into agricultural policy — particularly by regulating neonicotinoid pesticides and promoting integrated pest management — is essential for reversing decline.