Drought-induced shifts in soil microbial communities and carbon dynamics in agricultural and forest soils of Bangladesh.
Mamun AA
Soil Health
When the soil beneath your vegetable beds dries out, the microbial workforce that converts compost into plant-available nutrients can collapse by nearly a third — and it doesn't bounce back the same way in a garden as it does under trees.
Soil is full of microscopic life that breaks down dead plant material and releases nutrients plants need to grow. This study found that drought cuts that microbial community nearly in half, and the damage looks different in farmed fields versus forest floors. Forests held onto more carbon and had different communities of microbes surviving the dry spell than agricultural soils did.
Key Findings
Drought reduced total soil microbial biomass by roughly 29% — from 45.3 to 32.3 nmol PLFA per gram of soil — across both land-use types.
Agricultural and forest soils responded differently to drought, with distinct shifts in microbial community composition and carbon dynamics between the two systems.
Adding carbon amendments (organic matter) partially modified drought impacts on microbial activity, suggesting that organic inputs can buffer soil biology under water stress.
chevron_right Technical Summary
Drought dramatically disrupts the soil microbes that break down organic matter and recycle nutrients, and these effects play out differently in farmland versus forest soils in Bangladesh. Understanding these shifts helps predict how drought will affect soil fertility and carbon storage across different land uses.
Abstract Preview
Drought significantly alters soil microbial activity and carbon cycling, yet its effects across contrasting land-use systems remain insufficiently understood. This study investigated drought-induce...
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