The relation between species richness and area for a wide variety of taxa (angiosperm plants, birds, bats, freshwater fishes) is a

Options

A. Parabola
B. Rectangular hyperbola
C. Ellipse
D. Straight line

Answer

To solve the question regarding the relationship between species richness and area for various taxa, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Variables**:
- Species richness (S) refers to the number of different species present in a given area.
- Area (A) is the size of the habitat or region being studied.

2. **Establishing the Relationship**:
- The relationship between species richness and area can be expressed mathematically as \( S = CA^Z \), where:
- \( C \) is a constant,
- \( Z \) is a coefficient that indicates how species richness changes with area.

3. **Logarithmic Transformation**:
- To analyze this relationship more easily, we can take the logarithm of both sides:
\[ \log S = \log C + Z \log A \]
- This transformation allows us to express the relationship in a linear form.

4. **Interpreting the Graph**:
- In this logarithmic form, if we plot \( \log S \) (y-axis) against \( \log A \) (x-axis), we expect to see a straight line.
- The slope of this line will be \( Z \), and the y-intercept will be \( \log C \).

5. **Conclusion**:
- Therefore, the relationship between species richness and area for a variety of taxa is represented as a straight line on a logarithmic scale.

### Final Answer:
The relation between species richness and area for a wide variety of taxa (angiosperm plants, birds, bats, freshwater fishes) is a **straight line on a logarithmic scale**.

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