7.1.3 Biotic Factors

In this lesson, we will explore different biotic factors and how changes in these factors can affect a given community. Biotic factors are living organisms within an ecosystem that interact with each other and significantly impact community dynamics. 

Availability of Food

Food availability is a critical biotic factor that influences population dynamics and species interactions:

• Changes in food availability can affect the abundance and distribution of species within a community.
• Competition for limited resourcesThe inputs used to produce goods and services, including the factors of production. may lead to shifts in species' foraging behaviour, population sizes, or even changes in community structureThe organisation and order of information in a text..

New Predators Arriving

The introduction of new predators can have significant effects on community dynamics:

• Predators can directly impact prey populations, leading to changes in their abundance and behaviour.
• Prey species may alter their feeding habits or habitat use to avoid predation, causing a cascade of effects on other species within the community.

New Pathogens

The introduction of new pathogens, such as diseases or parasites, can have profound consequences on community dynamics:

• Pathogens can cause population declines or even extinctions of susceptible species.
• Changes in disease prevalence can disrupt ecological interactions and alter community structure.

Competition between Species

Competition between species for resources can shape community structure and population dynamics:

• Intense competition can lead to the displacementThe forced removal of people from their land. or extinction of weaker competitors, affecting community composition.
• Changes in the abundance or behaviour of one species can have indirect effects on other species within the community.

Changes in Reproductive Success

Changes in the reproductive success of a species can have cascading effects on community dynamics:

• If a particular species fails to reproduce successfully, its population size may decline, affecting its role within the community and potentially disrupting ecological interactions.
• Changes in reproductive success can impact the availability of prey for predators, alter pollination dynamics, or disrupt symbiotic relationships.

Conclusion

Biotic factors play a vital role in shaping community dynamics. Changes in the availability of food, the arrival of new predators or pathogens, competition between species, and alterations in reproductive success can all have significant impacts on community composition, species interactions, and ecosystem functioning.