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Interdependence and competition in communities

Ecology • Adaptations, interdependence and competition

Key concepts

What you'll likely be quizzed about

  • A population includes all organisms of the same species within a specific area, while a community encompasses two or more populations of different species that interact.
  • Ecologists study these interactions to understand how energy and materials flow through an ecosystem and how species coexist or compete with one another.
  • This foundational understanding is key for examining interdependence and competition.

Flashcards

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Adaptations and competition - connection

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Adaptations, such as structural, behavioral, or physiological changes, enhance access to resources, improving competitive success and reproductive output.

Key notes

Important points to keep in mind

A population is one species; a community includes multiple interacting populations.

Interdependence can create knock-on effects when any species or service changes; stable communities exhibit equilibrated interdependence and predator-prey cycling.

Competition occurs within (intraspecific) and between species (interspecific), affecting resource access and survival.

Limiting factors restrict growth or distribution; common limiting factors include light, water, nutrients, space, and oxygen.

Invasive species can outcompete natives by size, fertility, or disease resistance, leading to long-lasting community changes.

Adaptations improve competitive success; strategies like dispersal or niche differentiation reduce competition among offspring and between species.

Understanding cause → effect relationships enhances explanations: identify the limiting factor change, how it alters resource availability, and the resulting population impacts.

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