Slide 1 / 82 Slide 2 / 82 6th Grade Disturbance & Biodiversity 2015-08-27 www.njctl.org Slide 3 / 82 Slide 4 / 82 Table of Contents Click on the topic to go to that section Biodiversity · Biodiversity Disturbance · Succession · Works Cited · Return to Table of Contents Slide 5 / 82 Slide 6 / 82 Diversity Diversity This reef is much more diverse. Look at the two different coral reefs below. Which one is more diverse? Source: Wikimedia Commons. Author: Ritiks. Source: Wikimedia Commons. Author: National Park Service. Source: Wikimedia Commons. Author: Ritiks. Source: Wikimedia Commons. Author: National Park Service. Based on this information, how would you define diversity?
Slide 7 / 82 Slide 8 / 82 Biodiversity Biodiversity Diversity refers to the variety of items present. Look at the two boxes below. Each circle represents an organism in an ecosystem. Each different color represents a different species. If "bio" is added to the front of the word, it becomes biodiversity. Based on your knowledge, construct a definition for biodiversity. Write Circle the ecosystem that has more biodiversity. it in the box below and then click in the blue box to check your answer. Biodiversity is the variety of living things in an area. It is the number of different species present in an area. Slide 9 / 82 Slide 10 / 82 Biodiversity 1 If each box is a different ecosystem, which ecosystem has a higher biodiversity? This ecosystem has But this ecosystem has more individuals a higher biodiversity (larger populations). (more species). A B Biodiversity refers to the number of species not the total amount of organisms. Slide 10 (Answer) / 82 Slide 11 / 82 1 If each box is a different ecosystem, which 2 Biodiversity is the total number of organisms present ecosystem has a higher biodiversity? in an ecosystem. True A Answer False A B [This object is a pull tab]
Slide 11 (Answer) / 82 Slide 12 / 82 Activity: Calculating Biodiversity 2 Biodiversity is the total number of organisms present in an ecosystem. By using something called a biodiversity index, you can calculate and compare the biodiversity of different ecosystems. True Find out how in this activity! False False Answer Biodiversity is the total number of species in an ecosystem. Can you locate two different areas of biodiversity in this picture? [This object is a pull tab] Source: Wikipedia. Author: Viatour. Slide 13 / 82 Slide 14 / 82 Resilience Biodiversity & Ecosystem Health Look at the weed growing despite the presence of a sidewalk. What To understand how biodiversity affects the health of an ecosystem, does it mean to have resilience? Write your ideas in the box. we must first look at the concept of resilience. Wild flower meadows have a high biodiversity composed of vegetation, insects, birds and herbivores. Source: Wikimedia Commons. Author: Famartin. Source: Wikimedia Commons. Author: Becker. Slide 14 (Answer) / 82 Slide 15 / 82 Resilience Ecosystem Resilience Look at the weed growing despite the presence of a sidewalk. What Ecosystem resilience is the ability of an ecosystem to recover quickly does it mean to have resilience? Write your ideas in the box. after something disrupts it. Answer Resilience is the ability to recover quickly from difficult conditions. [This object is a pull tab] Source: Wikipedia. Author: Hannu. These pictures show the recovery of a forest 1 year after a fire (left) and 2 years after a fire (right). Source: Wikimedia Commons. Author: Becker.
Slide 16 / 82 Slide 17 / 82 Activity: Biodiversity & Disease Biodiversity & Resilience Biodiversity affects an ecosystem's resilience. Complete this activity Look at the diagram below. Describe how this diagram illustrates to understand how. the relationship between biodiversity and resilience. (Hint: What happens when biodiversity is low?) Source: Wikipedia. Author: Harris. Source: Nature Education Slide 18 / 82 Slide 19 / 82 Biodiversity & Resilience Biodiversity As biodiversity increases, so does an ecosystem's resilience. Biodiversity increases an ecosystem's health. When biodiversity is high, the community is maintained despite changes in temperature. When biodiversity is low, Every species in an ecosystem is the community does not closely tied to all other species. A survive well with a change to one will bring a change change in temperature. to all. Source: Nature Education Click here to watch a video about biodiversity. The more species that are present, the more likely that the ecosystem will survive a disruption. Source: Wikimedia Commons. Author: # # # . Slide 20 / 82 Slide 20 (Answer) / 82 3 A coastal ecosystem is destroyed by a hurricane. 3 A coastal ecosystem is destroyed by a hurricane. Despite this, the ecosystem recovers quickly. This Despite this, the ecosystem recovers quickly. This ecosystem is very ___. ecosystem is very ___. A unhealthy A unhealthy Answer D B unstable B unstable C stable C stable D resilient D resilient [This object is a pull tab]
Slide 21 / 82 Slide 21 (Answer) / 82 4 Biodiversity decreases an ecosystem's resilience. 4 Biodiversity decreases an ecosystem's resilience. True True False False Answer False [This object is a pull tab] Slide 22 / 82 Slide 23 / 82 Disturbance You just learned that an ecosystem's stability and resilience is related to how it reacts to disturbances. What types of disturbances can you think of that would affect ecosystems? Write your thoughts below. Disturbance Return to Table of Contents Slide 24 / 82 Slide 25 / 82 Disturbance Climate Change In an ecosystem, a disturbance is any event that removes organisms Let's use climate change as an example of a disturbance. or alters available resources. Climate change and the impacts of climate change affect Just a few examples include: ecosystems in a variety of ways. Storms Fire Can you think of ways in which climate could affect an Source: Wikimedia Commons. Author: Russavia. Source: Wikimedia Commons. Author: Lundeen. ecosystem? Write your ideas in the box. Human Drought Activities Source: Wikimedia Commons. Author: Russavia. Source: Wikimedia Commons. Author: U.S. Fish and Wildlife Service.
Slide 26 / 82 Slide 27 / 82 Climate and Ecosystems Climate and Ecosystems Climate change also affects water ecosystems in many ways. For A warming climate affects the habitats of many species. example, as sea level rises, saltwater mixes with freshwater ecosystems. This may force some key species to relocate or die, thus removing predators or prey that were critical in the existing Warming could force species to food chain. migrate to higher latitudes or higher elevations where temperatures are cooler and A glaciers become smaller, more conducive to their survival. there is less spring water flow, making it difficult for Source: Wikimedia Commons. Author: Inaglory. salmon to reach spawning grounds. This means a range expansion or reduction for some species. Animals could be forced to move into less friendly habitat. Some species might have nowhere to go if they are already at the northern or upper limit of Source: Wikimedia Commons. Author: U.S. Fish and Wildlife Service. their habitat. Slide 28 / 82 Slide 29 / 82 Climate and Ecosystems 5 A disturbance will ___. As rivers and streams warm, warmwater fish are expanding into A remove species from an area areas previously inhabited by coldwater species. B increase available resources Coldwater fish, including C alter available resources many highly valued trout species, are losing their D both A and C habitats. Source: Wikimedia Commons. Author: U.S. Fish and Wildlife Service. As waters warm, the area of feasible, cooler habitats to which species can migrate is reduced. Slide 29 (Answer) / 82 Slide 30 / 82 Unbalanced Ecosystems 5 A disturbance will ___. We have learned that a healthy ecosystem is sustainable through biodiversity. All of the species in an ecosystem have a role to play, A remove species from an area and their interactions have to remain balanced. B increase available resources What happens when that balance is disturbed? Answer D C alter available resources If the salamander population goes extinct due to acid rain, how would this D both A and C change the balance in this ecosystem? Write your ideas below. [This object is a pull tab] Source: EPA
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