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Topic 2 The Ecosystem

2.1 Structure
2.1.1 Distinguish between biotic and abiotic components of an ecosystem.
2.l.2 Define the term trophic level.
2.l.3 Identify and explain trophic levels in food chains and food webs selected from the local environment.
2.l.4 Explain the principles of pyramids of numbers, pyramids of biomass, and pyramids of productivity, and construct such pyramids from given data.
2.l.5 Discuss how the pyramid structure affects the functioning of an ecosystem.
2.l.6 Define the terms species, population, habitat, niche, community, and ecosystem with reference to local examples.
2.1.7 Describe and explain population interactions using examples of named species.

2.1 Structure of Ecosystems PPT (From class)
Build a Food Web
Energy Pyramids
Biomes of the World
The Habitable Planet: Ecosystems Video
Bill Moyer: What are Ecosystems?
Biological Pyramids
Energy Pyramids Video
Ecological Pyramids PPT (from class)
Food Web Song
Bioaccumulation & Biomagnefication
Bioaccumulation of Mercury in Oceans Video
Interactive Bioaccumulation - See how much mercury ends up in you!
Symbiotic Relationships
2.2 Measuring Abiotic Components of the System
2.2.1 List the significant abiotic factors of an ecosystem.
2.2.2 Describe and evaluate methods for measuring at least three abiotic factors within an ecosystem.

Using Temperature Probe Video
Using pH Probe Video
Using Disolved Oxygen Probe Video
Using Conductivity Sensor Video
Using Flow Rate Sensor Video
Lab: Measuring Abiotic Factors
2.3 Measuring Biotic Components of the System
2.3.1 Construct simple keys and use published keys for the identification of organisms.
2.3.2 Describe and evaluate methods for estimating abundance of organisms.
2.3.3 Describe and evaluate methods for estimating the biomass of trophic levels in a community.
2.3.4 Define the term diversity.
2.3.5 Apply Simpon's diversity index and outline its significance.

Photo Credit:
Classification & Dich. Keys PPT (From class)
Classification of Life & Scientific Names - made simple
Video: How to use a dichotomous key
Video: Creating a Dichotomous key
Practice Creating and Using a Dichotomous Key by making a Key of Different Types of Candy
PPT Measuring Biotic Factors
Capture-Mark-Recapture & the Lincoln Index
Virtual Lab: Lincoln Index - requires Java
Simpson's Diversity Index Video Lesson
Extra Practice Measuring Biotic Factors Wkst
2.4 Biomes
2.4.1 Define the term biome.
2.4.2 Explain the distribution, structure, and relative productivity of tropical rainforests, deserts, tundra, and any other biome.

Biomes of the World
Biomes Clickable Map with Videos from Each Biome
Nasa Biomes Website
Biome Website Including Many Aquatic Biomes
Biome and Net Productivity
Ecosystem Productivity
Biome Travel Brochure Assignment
Tropical Rainforest
Temperate Rainforest
Coral Reef
Biome Travel Brochure Assignment
2.5 Function
2.5.1 Explain the role of producers, consumers and decomposers in ecosystems.
2.5.2 Describe photosynthesis and respiration in terms of inputs, outputs, and energy transformations.
2.5.3 Describe and explain the transfer and transformation of energy as it flows through an ecosystem.
2.5.4 Describe and explain the transfer and tranformation of materials as they cycle within an ecosystem.
2.5.5 Define the terms gross productivity, net productivity, primary productivity, and secondary productivity.
2.5.6 Define the terms and calculate the values of both gross primary productivity (GPP) and net primary productivity (NPP) from given data.
2.5.7 Define the terms and calculate the values of both gross secondary productivity (GSP) and net secondary productivity (NSP) from given data.

An Overview of Photosynthesis
Photosynthesis Song
Crash Course Video Photosynthesis
Cellular Respiration Overview
PH School Cellular Respiration Activity
Crash Course Video Cellular Respiration
Carbon Cycle Animated Video
NOAA- Carbon Cycle
Carbon Cycle Game
Nitrogen Cycle Made Easy - Video
Nitrogen Cycle Interactive
Nitrogen Cycle Animation
Interactive Water Cycle
NSF - Water Cycle (short video)
Bill Nye - Water Cycle
The Real Story of Water - Surfrider Foundation A Must Watch Video to Look at Problems related to water
2.5.6 Calculating GPP and NPP
2.5.7 Calculating GSP and NSP
Productivity Simulation Lab
PPT 2.5 Ecological Cycles
PPT 2.5 Ecological Productivity
2.6 Changes
2.6.1 Explain the concepts of limiting factors and carrying capacity in the context of population growth.
2.6.2 Describe and explain S and J population curves.
2.6.3 Describe the role of density-dependent and density-independent factors, and internal and external factors, in the regulation of populations.
2.6.4 Describe the principles associated with survivorship curves including K- and r-strategists.
2.6.5 Describe the concept and processes of succession in a named habitat.
2.6.6 Explain the changes in energy flow, gross and net productivity, diversity, and mineral cycling in different stages of succession.
2.6.7 Describe factors affecting the nature of climax communities.

Credit:Missouri Department of Conservation
Limiting Factors & Carrying Capacity
Video Lesson on Population Growth Curves
Hands On Interactive Population Growth Graphs
K and r-strategists
Crash Course: Population Ecology
Ecological Succession Lesson
Primary and Secondary Succession
PPT 2.6 Changes & Populuation Dynamics (from class)
2.7 Measuring Changes in the System
2.7.1 Describe and evaluate methods for measuring changes in abiotic and biotic components of an ecosystem along an environmental gradient.
2.7.2 Describe and evaluate methods for measuring changes in abiotic and biotic components of an ecosystem due to a specific human activity.
2.7.3 Describe and evaluate the use of environmental impact assessments (EIAs).

Credit:Missouri Department of Conservation
A Guide to EIA's'
Video Lesson on EIA's
Examples of EIA's
PPT 2.7 Measuring Changes in a System (from class)
Class Environmental Timeline for Review