Question

Scientists have discovered the bodies of humans and other living things buried in bogs for hundreds of years, but not yet decomposed. Suggest a possible biological explanation for why such bodies are so well-preserved.

Short answer

Bogs have a low oxygen content and a high concentration of organic acids. The sluggish pace of decomposition is slowed by the low oxygen level and low pH.

Step-by-step solution

Introduction

A bog is a freshwater wetland with a soft, spongy ground formed primarily of partially degraded plant materials called peat. Bogs are most commonly found in northern regions. They thrive in the ponds left behind by glaciers during the last ice age, which have poor drainage.

Explanation

Organic soils are composed of saturated fibric peat with partially degraded sphagnum mosses, sedge, and wood fragments. Peat soils are acidic, cold, and have low nutrient availability and oxygen levels, similar to surface water.

Explanation

Organic matter breakdown is slowed by saturated and inundated circumstances, which allows peat to accumulate. Organic matter accumulation outpaces organic breakdown under chilly, anaerobic, and acidic environments. The sluggish pace of decomposition is slowed by the low oxygen level and low pH.