NAME What is a dead zone in an aquatic ecosystem and how does it come about? STUDENT NUMBER
Please watch this film in class:
Understanding Ecosystems, Organisms and their Environment ( https://www.youtube.com/watch? Interacting Organisms v=pSwnjhIeX1w ) Define competitive exclusion. Please download this electronic document and complete this ELECTRONICALLY and Print it out and Define predation submit by 27 March. Define a predator –prey relationship and what happens if Document Location (also available from ESS UWC they get disrupted? Facebook) Define and give examples of animal defence systems. planet.botany.uwc.ac.za/nisl/ESS_2014/ESS121_Adaptive_M anagement Describe camouflage adaptations among animals.
Energy Transfer Define what the commensalism relationship is.
Organisms don’t live in Isolation. Define what the mutualism relationship is.
List some Ecosystems. Define what parasitism is and how important it is for regulating ecosystems. What are the components of an Ecosystem? The Impact of Change What is an Ecological community? Describe ecological succession. What are the two main types of organisms in an ecosystem? What is meant by cycles of regeneration?
What are decomposers? Describe how local human (anthropogenic) activities may generate into global issues. Define what a food chain and a food web are and how they are different from each other? What are the recent patterns of change in global biodiversity? Energy Flow Describe and indicate the extent of global deforestation. Define the difference between abiotic and biotic? Describe how soil erosion comes about. Define what an “energy pyramid” is and explain how it conceptualises different trophic levels? Why are the world’s coral reefs dying?
Explain the 10% energy rule in an energy pyramid. Why is there a current mass extermination of biodiversity?
Explain what you understand from the term re-cycling. Importance of Trees
Why is water indispensible for maintaining life? Why are trees important within an ecosystem?
Briefly describe the water cycle. Why are the northern coniferous forests important for the health of our global ecosystems? Define what a biosphere is? Why are “dead trees” important for the heath of a forest Briefly describe the Carbon Cycle. ecosystem and maintaining biodiversity?
What is a fossil fuel? Forest ecosystems are described as being chaotic. Discus how and why this is a suitable description of these Define a greenhouse gas. ecosystems.
How do greenhouse gasses influence climate change? Why are forests important for economic development?
Describe the nitrogen cycle. How can forests be of cultural valuable?
Farming has added large amounts of nitrogen and Why has so much tropical and temperate forest been phosphorous to the soil, what impact has this had? cleared (felled)? How can we manage forests sustainably?
Why is it important to conserve our world’s forests?
Why is it important to conserve wetlands like the Florida Everglades?
Why are Mangroves such an important world ecosystem?
Describe how some forests are fire adapted and describe the regeneration process.