The species which are present in large numbers and have large size are called

Options

A. Ecological equivalent
B. Ecological dominants
C. Link species
D. Keystone species

Answer

To answer the question, "The species which are present in large numbers and have large size are called," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question is asking for a term that describes species that are both abundant (present in large numbers) and large in size.

2. **Identify Key Terms**: The key terms here are "large numbers" and "large size." We need to find a term that encompasses both of these characteristics.

3. **Consider the Options**: The transcript mentions several types of species:
- **Niche**: This refers to the role or function of a species within an ecosystem, not necessarily related to size or population.
- **Ecological Dominant**: This term refers to species that are abundant and have a significant impact on their ecosystem due to their large population and size.
- **Link Species**: These species have characteristics that bridge two taxonomic groups, which does not relate to size or population.
- **Keystone Species**: These species play a crucial role in their ecosystem, but their population size or physical size is not necessarily large.

4. **Analyze the Correct Term**: From the options discussed, "Ecological Dominant" is the term that best fits the description of species that are present in large numbers and have a large size. These species dominate their ecosystem due to their abundance and physical presence.

5. **Conclude the Answer**: Therefore, the species which are present in large numbers and have large size are called **Ecological Dominants**.

### Final Answer:
**Ecological Dominants**

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