Why plants grow in marshy areas decay after sometime?

Plants in marshy areas tend to decay over time due to the high moisture levels and anaerobic conditions that promote decomposition. The accumulation of dead organic matter, combined with limited oxygen, creates an environment where decomposer organisms thrive, breaking down plant material. Additionally, the slow drainage of water can lead to anoxic conditions, further inhibiting the growth of new plants and accelerating decay. This cycle contributes to the unique nutrient dynamics of marsh ecosystems.