Go to the Quizzes Page Changing Ecosystems 0% 840 Created by AbuBakrShalabi Please write your name and email to receive your certificate. 1 / 20 Any species that occurs outside its native range as a result of deliberate or accidental introduction by humans. Non native species Invasive species Native species Keystone species 2 / 20 Which of the following statements about ecological succession are TRUE? Ecological succession is a process of quick changes in ecosystems. Ecological succession takes place in both land and water ecosystems. Ecological succession in an ecosystem takes place slowly over time. Ecological succession only occurs in water ecosystems. 3 / 20 As you remove resources from an ecosystem, what happens to the population of an organism? It increases It increases then decreases It stays the same It decreases 4 / 20 Which of the following would count as a disruption to an ecosystem? All of the Above Natural disaster Invasive species Change in temperature 5 / 20 What is the original cause of eutrophication? Too much oxygen Too many predators Excess fertilizer Too many herbivores 6 / 20 Why does primary succession take longer to reach climax community? Because trees do not perform photosyntheses. Because primary succession does not have soil Because climax community is in a forrest. Because primary succession already has soil 7 / 20 An organism that establishes itself outside of its natural range and begins to harm the environment. Extinct species Non native species Invasive species Keystone species 8 / 20 The Final stage of ecological succession is... Pioneer Community Climax Community Mature Tree Growth 9 / 20 Pollution can cause harm to the ___________. air all of the above land water 10 / 20 What type of succession is shown in the image? Aquatic Succession Community Succession Secondary Succession Primary Succession 11 / 20 What is the difference between primary and secondary succession? Primary succession already has soil. soil is present in both primary has no soil and secondary has soil Primary has soil and secondary does not 12 / 20 Humans extract resources from nature such as coal, oil, and water.What are some likely problems caused by resource extraction? increased availability to energy resources loss of habitats increasing amounts of pollution improved air and water quality 13 / 20 Why do the populations of invasive species grow so quickly? They are prey to many animals. Invasive species have no natural predators. They have no food in their new ecosystem. 14 / 20 What does the term dynamic equilibrium mean? An overall balance between the different parts of an ecosystem although the parts constantly change. A changing ecosystem that cannot be balanced because of change. A balanced ecosystem that stays the same without any changes. An unbalanced ecosystem in which the parts constantly change. 15 / 20 Which of the following are ways humans can cause the loss of biodiversity within an ecosystem? Habitat destruction Over-fishing / Over-hunting All of the Above Pollution 16 / 20 What happens when humans cut down forests to build shopping malls? Plants and animals thrive in the new environment and pollution decreases. Habitat is altered, plants and animals destroyed, and pollution increases. New animals species form and plants produce more oxygen. The shopping mall reduces the amount of pollution in the area. 17 / 20 A climax community is …. an area that reaches its greatest growing potential. the beginning of a new ecological succession. the fire that will cause destruction. the rocks in a new environment. 18 / 20 Kudzu has overgrown many parts of the southern and eastern US and native ground plants have disappeared from the area. This is an example of: Commesalism occurring between the kudzo and native plants A predator prey relationship between ground plants and kudzu Parasitism between kudzu and the native plants Competition occurring between the native and invasive species 19 / 20 What type of succession does the image show? Secondary Succession Primary Succession Aquatic Succession Ecosystem Succession 20 / 20 The sea lamprey is a risk to native fish because: It eats the alage the fish need. The lamprey causes no risk to native fish. It is ruining beaches. It attaches to the body and sucks the blood from the fish. Your score is 0% Restart quiz Go to the Quizzes Page