Biotic and Abiotic Influences on Ecosystem Dynamics

The video tutorial covers the influences of biotic and abiotic factors on ecosystems, focusing on concepts like carrying capacity, limiting factors, and biotic potential. It explains how these factors affect population size and growth, using examples and graphs. The tutorial also delves into abiotic factors specific to terrestrial and aquatic ecosystems and explores biotic relationships such as mutualism, parasitism, and commensalism.

What does the term 'abiotic' refer to in an ecosystem?

• Animal interactions

• Non-living components

• Living components

• Plant growth

What is the maximum population size that an ecosystem can sustain called?

• Biotic potential

• Population limit

• Limiting factor

• Carrying capacity

Which of the following is an example of a limiting factor?

• Unlimited food supply

• Abundant water resources

• Limited shelter availability

• Excessive sunlight

What does 'biotic potential' describe?

• The impact of non-living factors on a population

• The rate at which a species can reproduce under ideal conditions

• The maximum size of a population

• The number of species an ecosystem can support

What happens when a population overshoots its carrying capacity?

• Limiting factors decrease

• Resources become more abundant

• The population stabilizes

• The population may collapse

Which abiotic factor is crucial for both terrestrial and aquatic ecosystems?

• Salinity

• Light

• Soil

• Acidity

What is mutualism in a symbiotic relationship?

• One species benefits, the other is harmed

• Both species benefit

• One species benefits, the other is unaffected

• Neither species benefits

In a predator-prey relationship, what is the outcome for the prey?

• It benefits

• It is unaffected

• It is harmed

• It becomes a predator

What type of competition occurs between members of the same species?

• Intraspecific competition

• Predator-prey competition

• Symbiotic competition

• Interspecific competition

Which relationship involves one organism benefiting while the other is neither helped nor harmed?

• Predation

• Commensalism

• Parasitism

• Mutualism