As "ecosystem engineers," their burrowing actions aerate the soil and add nitrogen , while their castings (waste) improve mineral content and help with soil binding . Reading Answers & Key Vocabulary
FALSE Explanation: The passage notes that certain species (like Eisenia fetida ) tolerate a wide pH range (5.0–9.0) and even thrive in mildly acidic or alkaline contaminated soils.
Former Hallside steelworks, Cambuslang (near Glasgow).
As "ecosystem engineers," their burrowing actions aerate the soil and add nitrogen , while their castings (waste) improve mineral content and help with soil binding . Reading Answers & Key Vocabulary
FALSE Explanation: The passage notes that certain species (like Eisenia fetida ) tolerate a wide pH range (5.0–9.0) and even thrive in mildly acidic or alkaline contaminated soils.
Former Hallside steelworks, Cambuslang (near Glasgow).