Answer:
- When non-biodegradable pollutants (such as POPs and heavy metals) enter a food chain, their concentration progressively increases at each successive trophic level, this phenomenon is known as biomagnification. Its highest concentration occurs in top consumers.
- Key Causes: These chemicals do not degrade in water and cannot be easily excreted by organisms. Being fat-soluble, the body cannot metabolize or eliminate them, causing them to accumulate in tissues.
Impact on the Ecosystem:
- Disruption and imbalance of the food chain.
- Thinning of bird eggshells, leading to premature breaking and population decline.
- Severe threat to the survival of aquatic and terrestrial life.
Impact on Human Health:
- Damage to vital organs and kidneys.
- Increased risk of cancer.
- Serious reproductive and developmental disorders, along with adverse effects on the nervous system.
- Hence, biomagnification proves to be critically detrimental to both ecosystems and human health.