Unit 4: My Community Ecology Ecology and Biodiversity. Day 3- Biodiversity

Transcription

1 Unit 4: My Community Ecology Ecology and Biodiversity Day 3- Biodiversity

2 Scale Level 3 Level 2 3A: Based on our development site, predict the impact of removing a species on the structure and function of the ecosystem 3B: Develop an argument for the conservation of biodiversity in an ecosystem 2A: Identify and describe the following components of species interactions Biological populations Biological communities Species interactions (mutualism, commensalism, predation, paratism) Major terrestrial and aquatic biomes Keystone species Food webs Trophic levels Ecological pyramids (energy, biomass, population) Law of Thermodynamics 2B: Define and describe biodiversity and the Endangered Species Act

3 Biomes

4 Primary Productivity Gross Primary Productivity: The amount of energy that is produced by producers (plants) Net Primary Productivity: The amount of energy that is passed on the primary consumers Respiration: the amount of energy used (NOT passed on to producer) Hint: Gross= paycheck before taxes, Net= Paycheck after taxes. Respiration= taxes How to calculate: Gross Primary Productivity Respiration = Net Primary Productivity

5 Practice Calculating Primary Productivity Gross Primary Productivity Respiration = Net Primary Productivity Producer GPP Respiration NPP Algae 15 5 Sunflower 28 8 Apple Tree Tomato Redwood Tree

6 Connecting Biomes and Primary Productivity Primary Productivity Video Questions: 1. Why does the map cycle from more energy (green) to less energy (white) throughout the year? 2. What is the relationship between GPP and Biomes?

7 What is Biodiversity The NUMBER OF DIFFERENT species in an area and/or The GENETIC VARIATION within each species

8 Ranking of biodiversity in Biomes Which biome has the HIGHEST biodiversity? Which biome has the LOWEST biodiversity? Research it Google knows!!

9 Biodiversity and Evolution Directly connected to Survival of the Fittest The organisms that have the most favorable traits will survive and will past them to their offspring Stabilizing Selection: organisms with too extreme of traits will be eliminated Directional Selection: selective breeding for traits

10 Biodiversity changers- INCREASING Diverse Habitats Disturbances in the habitat (fires, storms, etc.) Environmental conditions with low variation Trophic levels with high diversity Middle states of successions Evolution

11 Biodiversity changers- DECREASING Environmental stress Extreme environments Extreme limitations of fundamental resources Introduction of species from other area Geographic isolation

12 Benefit of Biodiversity 1. Helps maintain unique ecosystems 2. Ensures access to potential new medicines 3. Different variety of food for constant food supply 4. Promotes healthy wildlife populations 5. Keeps organisms from going extinct

13 Calculating Biodiversity Number closer to 1= Highly Diverse = Medium High Diverse = Medium Low Diverse Number closer to 0= Low/No Diversity Biodiversity = Number of species in the area Total number of inviduals in the area Example #1: 1 species (all Stars) 8 total (8 stars) = (low Biodiversity) Example #2:

14 Is the Development Site Biodiverse? We will use the tree data that was collected to determine if the site is biodiverse or not