The rate of decomposition is faster in the ecosystem due to the following factors EXCEPT:-

Options

A. Detritus rich in sugars
B. Warm and moist environment
C. Presence of aerobic soil microbes
D. Detritus richer in lignin and chitin

Answer

To solve the question regarding the factors that influence the rate of decomposition in ecosystems, we will analyze each option provided and determine which one does not contribute to faster decomposition.

### Step-by-Step Solution:

1. **Understanding Decomposition**:
- Decomposition is the process by which dead organic matter is broken down into simpler organic or inorganic substances. This process is crucial for nutrient cycling in ecosystems.

2. **Identifying Key Factors Influencing Decomposition**:
- The rate of decomposition can be influenced by several factors, including:
- The composition of detritus (the dead organic matter).
- Environmental conditions such as temperature and moisture.
- The presence of microorganisms.

3. **Analyzing Each Option**:
- **Option 1: Detritus rich in sugars**:
- Sugars are easily broken down by microorganisms, leading to faster decomposition. Therefore, this option contributes to faster decomposition.

- **Option 2: Warm and moist environment**:
- A warm and moist environment is conducive to the activity of decomposers, thus speeding up the decomposition process. This option also contributes to faster decomposition.

- **Option 3: Presence of aerobic soil microbes**:
- Aerobic microbes play a significant role in breaking down organic matter through aerobic respiration, which enhances the decomposition process. This option also contributes to faster decomposition.

- **Option 4: Detritus rich in lignin and chitin**:
- Lignin and chitin are complex compounds that are more resistant to decomposition. High amounts of these substances slow down the decomposition process. This option does not contribute to faster decomposition.

4. **Conclusion**:
- The correct answer to the question is **Option 4: Detritus rich in lignin and chitin**, as this factor slows down the rate of decomposition.