Ecology Concepts and Relationships

This video covers key concepts in ecology, including the relationships between organisms and their environment, energy flow, community ecology, and human impact. It explains biotic and abiotic factors, levels of ecological organization, and interactions such as competition and predation. The video also discusses energy flow through food chains and webs, community dynamics, population growth strategies, and the significant impact humans have on ecosystems, including global warming and pollution.

What is the primary focus of ecology?

• The study of nonliving factors

• The study of individual organisms

• The study of the relationship between organisms and their environment

• The study of human impact on nature

Which of the following is an abiotic factor?

• Bacteria

• Plants

• Animals

• Sunlight

What is the difference between a habitat and a niche?

• A habitat is a nonliving factor, while a niche is a living factor

• A habitat is a group of populations, while a niche is a group of organisms

• A habitat is where an organism lives, while a niche is its role in the environment

• A habitat is the role of an organism, while a niche is where it lives

Which type of symbiotic relationship benefits both species involved?

• Parasitism

• Commensalism

• Mutualism

• Predation

What is the role of autotrophs in an ecosystem?

• They decompose organic matter

• They consume other organisms for energy

• They produce their own food through photosynthesis

• They compete for resources

In an energy pyramid, which level contains the most energy?

• Primary consumers

• Secondary consumers

• Tertiary consumers

• Producers

What is a density-independent factor?

• A factor that affects all populations regardless of size

• A factor that only affects large populations

• A factor that only affects small populations

• A factor that depends on the population size

Which of the following is a characteristic of r-strategists?

• Adaptation to stable environments

• Few offspring

• Many offspring with low survival rate

• Long lifespan

What is biomagnification?

• The increase of toxic substances in organisms at higher trophic levels

• The decrease of energy as it moves up the food chain

• The impact of invasive species on native populations

• The growth of algae due to excess nutrients

How does eutrophication affect aquatic environments?

• It reduces water temperature, benefiting aquatic plants

• It causes algae blooms that deplete oxygen, harming aquatic life

• It increases oxygen levels, benefiting fish

• It increases biodiversity by introducing new species