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  1. AP Environmental Science
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Introduction to Ecosystems

Liam Thomas

Liam Thomas

7 min read

Next Topic - Terrestrial Biomes

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Study Guide Overview

This study guide covers ecosystem ecology, focusing on the interactions between biotic and abiotic factors. Key concepts include symbiotic relationships (mutualism, commensalism, parasitism), predator-prey dynamics, competition and resource partitioning, and the roles of keystone species and ecosystem engineers. The guide also emphasizes ecosystem dynamics and provides practice questions covering these topics.

#Ecosystem Ecology: Your Night-Before Survival Guide 🌿

Hey there, future AP Environmental Science rockstar! Let's dive into ecosystem ecology with a focus on what you really need to know for tomorrow. We'll keep it engaging, clear, and super relevant to the exam.

#What is an Ecosystem?

Think of an ecosystem as a specific place on Earth where living (biotic) things interact with non-living (abiotic) things. It's like a big, complex party where everyone and everything has a role!

  • Biotic: Plants, animals, bacteria – anything alive!
  • Abiotic: Rocks, soil, air, water – the non-living stuff.
  • Biosphere: All the ecosystems combined.

Ecosystems can be tiny (a puddle) or huge (the Amazon rainforest). They're found everywhere:

  • Terrestrial: Land-based (forests, grasslands)
  • Aquatic: Water-based (oceans, lakes)
  • Atmospheric: Air-based (the atmosphere itself!)

Image of an Elephant

Caption: An elephant in its ecosystem, showcasing the interaction between biotic (the elephant) and abiotic (the environment) components.

Key Concept

Understanding that ecosystems are interconnected and dynamic is key. Changes in one part of an ecosystem can ripple through the entire system.

#Community Ecology: Who's Who in the Ecosystem Zoo?

#Relationships Between Species

Species in an ecosystem are all tangled up in relationships. Here are the main types:

  • Predator-Prey: 🐅 eats 🦌. Predators control prey populations, and prey develop defenses. Think of it as an evolutionary arms race!

    • Behavioral defenses: Hiding, running away
    • Morphological defenses: Camouflage, spikes
    • Chemical defenses: Poison, toxins
  • Symbiotic Relationships: At least one species benefits.

    • Mutualism: Both benefit (+/+) - Think of bees and flowers 🐝🌸
    • Commensalism: One b...
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Previous Topic - The Living World: EcosystemsNext Topic - Terrestrial Biomes

Question 1 of 10

Ready to dive in? 🤿 Which of the following is considered a biotic component of an ecosystem?

Rocks

Water

Bacteria

Air