NRM 1401 Exam 3 Questions With All Correct Answers!!

What is an ecosystem? -Answer- A community of living organisms and their environment. What is ecosystem ecology? -Answer- The study of how energy and nutrients flow through ecosystems. What is disturbance? -Answer- An event that disrupts an ecosystem. What is an ecosystem engineer? -Answer- A species that modifies its environment. What is an autotroph? -Answer- An organism that produces its own food. What is a heterotroph? -Answer- An organism that obtains food by consuming other organisms. What is a keystone species? -Answer- A species that has a disproportionately large impact on its environment. Compare and contrast primary and secondary succession. -Answer- Primary succession occurs on bare rock, while secondary succession occurs on previously inhabited land. Explain the difference between resistance and resilience when discussing disturbance regimes. - Answer- Resistance is the ability to withstand disturbances, while resilience is the ability to recover from disturbances. What are the relations between food chains and food webs? -Answer- Food chains are linear sequences of organisms, while food webs show the interconnectedness of multiple food chains. What are the different trophic levels of food chains and food webs? -Answer- Producers, primary consumers, secondary consumers, tertiary consumers. What are the Laws of Thermodynamics? -Answer- Energy cannot be created or destroyed, only transferred or transformed.What is top-down and bottom-up control of ecosystems? -Answer- Top-down control is when predators regulate the abundance of lower trophic levels, while bottom-up control is when the availability of resources regulates the abundance of higher trophic levels. What is compensation depth? -Answer- The depth at which photosynthesis equals respiration in aquatic ecosystems. What is a wetland? -Answer- An area of land that is saturated with water. What is lentic? -Answer- Relating to still water, like lakes and ponds