All the following are limitations of ecological pyramids, except

Options

A. doesn't account for the same species in two or more trophic levels
B. saprophytes are not given any place
C. not good for a food web
D. not good if there are more than three trophic levels

Answer

### Step-by-Step Text Solution:

1. **Understanding Ecological Pyramids**:
- Ecological pyramids are graphical representations that illustrate the relationships between different organisms in an ecosystem, categorized by their trophic levels (e.g., producers, primary consumers, secondary consumers, etc.).

2. **Identifying Limitations**:
- The question asks us to identify which of the provided options is **not** a limitation of ecological pyramids. The options given are:
- A) Does not account for the same species in two or more trophic levels
- B) Saprophytes are not given any place
- C) Not good for a food web
- D) Not good if there are more than three trophic levels

3. **Analyzing Each Option**:
- **Option A**: Ecological pyramids do not account for the same species appearing in multiple trophic levels. This is indeed a limitation.
- **Option B**: Saprophytes (decomposers) are not represented in ecological pyramids. This is also a limitation.
- **Option C**: Ecological pyramids are not effective for representing food webs, which is another limitation.
- **Option D**: The statement claims that ecological pyramids are not good if there are more than three trophic levels. This is incorrect; ecological pyramids can represent ecosystems with more than three trophic levels.

4. **Conclusion**:
- Since option D is the only statement that is not a limitation of ecological pyramids, the correct answer is **D**.