AP Biology - Community Ecology & Food Webs

Описание: Learn how energy flows through ecosystems and how species interact in this AP Biology community ecology review. This session covers trophic levels, food web construction, and the three main symbiotic relationships (parasitism, commensalism, mutualism) with practice problems to strengthen your understanding.

You'll review energy transfer between organisms, why only 10% of energy moves up each trophic level, and how to correctly draw food web arrows. We also break down real-world examples of species interactions and work through AP-style practice questions about predicting population changes.

⏱️ TIMESTAMPS:
0:00 Introduction to Community Ecology
0:32 Building on Population Ecology
1:33 Defining Communities
2:04 Community Example
3:07 Population Ecology Refresher
4:09 Energy Flow in Communities
4:41 Trophic Levels Overview
5:44 Energy Loss and Heat
6:46 Producers and Consumers
7:49 Energy Pyramid Explanation
8:50 Implications for Predators
10:23 Role of Producers
12:26 Food Web Construction Rules
13:58 Analyzing Food Webs
15:31 Species Relationships
16:34 Parasitism Examples
17:06 Commensalism Examples
18:39 Mutualism Examples
20:13 Predator-Prey Dynamics
22:19 Practice Problem One
26:14 Food Web Diagram
27:46 Next Practice Problem
30:31 Symbiotic Relationships Analysis
32:34 Audience Questions
35:42 Session Wrap-Up

WHAT YOU'LL LEARN:
• How energy flows through trophic levels and why only 10% transfers up
• The difference between food chains and food webs
• How to correctly draw arrows in food webs (energy direction matters!)
• Parasitism, commensalism, and mutualism with real examples
• How to predict population changes when species are removed
• Practice problems to test your understanding

📚 STUDY AP BIO WITH FIVEABLE:
Study guides, practice questions, and exam prep for AP Biology.
📖 Study Guides: https://fiveable.me/ap-bio
✏️ Practice Questions: https://fiveable.me/guided-practice/a...

👍 Subscribe for more AP Biology review sessions and exam prep help!

#APBiology #CommunityEcology #APExamPrep #FoodWebs #StudyBiology