First AP Environmental Science Flipped Notes

Topic Overview

  • Topic 1.1: Ecosystems
  • Objective: Explain how resource availability influences species interactions.
    • Focus on predator-prey relationships, symbiosis, competition, and resource partitioning.
  • Skills Practice: Describing an environmental concept.

Ecosystem Basics

Individual
  • Definition: One single organism.
    • Example: A single elk (denoted as an "individual").
Population
  • Definition: A group of organisms all of the same species.
    • Example: An elk herd, all members of the same species.
Community
  • Definition: All the living organisms in a given area, including plants, animals, bacteria, and fungi.
    • Example: A community might include trees, grass, beavers, rabbits, and soil microbes.
Ecosystem
  • Definition: A community along with its nonliving (abiotic) components.
    • Includes factors such as rocks, soil, water, and how they interact with living components.
Biome
  • Definition: A large area with a similar climate that determines the types of plants and animals that can survive there.
    • Example: Tropical rainforest characterized by warmth and high rainfall, leading to diverse life forms.

Species Interactions

Overview of Interactions
  • Chart of Different Types of Interactions:
    1. Competition
    • Type: Lose-lose situation
    • Definition: Organisms vie for shared resources like food or shelter, limiting population size due to insufficient resources.
    1. Predation
    • Type: Win-lose situation
    • Definition: One organism consumes another for energy, resulting in the death or harm of the prey.
    1. Mutualism
    • Type: Win-win situation
    • Definition: A beneficial relationship for both species involved. Examples include coral and algae.
    1. Commensalism
    • Type: Win-neutral situation
    • Definition: One species benefits while the other is unaffected. Example: Birds nesting in trees.
Predation
  • Definition and Types:
    • Herbivores (e.g., giraffes) also seen as predators when they consume plants for energy.
    • True Predators: Carnivores (e.g., leopards, lions) that actively hunt and eat other animals.
    • Parasites: Organisms that draw energy from hosts without typically killing them (e.g., sea lamprey, mosquitoes, tapeworms).
    • Parasitoids: A specific type of parasite that lays eggs inside hosts, leading to host death (e.g., parasitic wasps).
Symbiosis
  • Definition: Long-term interaction between two different species living closely together.
    • Root words: Sym = together, Bio = living, Osis = state of being.
    • Not inherently good or bad; encompasses mutualism, commensalism, and parasitism.
Mutualism
  • Definition: A symbiotic relationship where both species benefit.
    • Example: Coral reefs, where corals provide materials for algae, and algae provide sugars to corals.
    • Coral polyp definition: An individual coral animal.
Resource Competition vs. Resource Partitioning
  • Competition: Results in reduced population sizes for both competing species.
  • Resource Partitioning: Mechanism that allows species to utilize the same resource differently, reducing competition.
    • Examples of types of resource partitioning:
    1. Temporal Partitioning: Using resources at different times (e.g., wolves and coyotes hunting at different times).
    2. Spatial Partitioning: Utilizing different areas for resources (e.g., different grasses accessing different soil depths).
    3. Morphological Partitioning: Evolving different features to exploit various parts of the same resource (e.g., different jaw sizes in fairer and ermine).
  • Key takeaway: Resource partitioning allows species to thrive without direct competition, resulting in larger population sizes.

FRQ Practice

  • Task: Identify two organisms in a given food web that compete for the same resource and describe how resource partitioning could reduce that competition.

Conclusion

  • Reminder: Interactions in ecosystems are complex and have significant implications for species survival and community dynamics.
  • Encourage reviewing additional notes, liking the video, and subscribing for further updates.
  • Closing thought: "Think like a mountain, write like a scholar."