Which outcome occurs when excessive earthworm activity concentrates pollutants?

💡 Explanation

Pollutants are bioaccumulated due to bioturbation by earthworms; this concentrates toxins in their tissues because, rather than being broken down completely, the chemicals are moved up the trophic chain which enhances bioavailability; therefore the contaminant exposure for predators increases.

• Which ecological shift results when upwelling cessation leads to nutrient depletion in surface waters?
• Which depositional outcome occurs where a deeply entrenched river emerges onto a broad alluvial plain?
• Which vent-related outcome increases greatly because expanding lava pressure exceeds rock strength?
• Which outcome results when subduction causes hydrothermal vent blockage?
• Which mechanism initiates lake formation following glacial retreat in mountainous regions?
• Which outcome accelerates formation of fractured karst stalactites?