Population Dynamics and Ecosystem Factors

The video tutorial explores factors affecting populations within ecosystems, focusing on definitions of key ecological terms, population growth dynamics, and the roles of abiotic and biotic factors. It explains how population growth progresses through phases and reaches carrying capacity, influenced by non-living and living factors. The tutorial also delves into competition types and their impact on ecosystems.

What is the term for the number of organisms of a particular species present in an ecosystem?

• Ecosystem

• Community

• Population

• Niche

Which phase of population growth is characterized by a rapid increase in numbers?

• Decline phase

• Carrying capacity

• Exponential growth

• Slow growth

What is the term for the maximum population size that an environment can sustain?

• Saturation point

• Population limit

• Exponential growth

• Carrying capacity

Which abiotic factor is crucial for photosynthesis in plants?

• Humidity

• Carbon dioxide concentration

• Wind

• Oxygen concentration

How does light intensity affect photosynthesis?

• It stops photosynthesis

• It increases the rate

• It decreases the rate

• It has no effect

Which factor is not typically a concern for aquatic plants?

• Mineral ions

• Temperature

• Light intensity

• Water availability

What is the primary abiotic factor affecting enzyme activity in plants?

• Wind

• Temperature

• Light

• Humidity

What type of competition occurs between different species?

• Inter-specific

• Intra-specific

• Mate-specific

• Resource-specific

Which biotic factor involves organisms competing for resources like food and mates?

• Symbiosis

• Competition

• Disease

• Predation

What should you consider when answering questions about biotic and abiotic factors?

• Whether the organism is terrestrial or aquatic

• The age of the organism

• The size of the organism

• The color of the organism