Ecological Relationships

Video: Amoeba Sisters - Ecological Relationships Use the video to review some of what you learned this week about ecological relationships. Then answer the questions below. A symbiotic relationship may not be beneficial to either species. True False Types of symbiosis include intraspecific and interspecific competition. True False Camouflage is a common adaptation in both predator and prey species. True False All parasites kill their hosts. True False Predator adaptations help them escape from prey. True False Read this passage based on the text and answer the questions that follow Predation is a relationship in which members of one species consume members of another species. The consuming species is called the predator. The species that is consumed is called the prey. For examples, wolves are predators, and moose are their prey.A predator-prey relationship tends to keep the populations of both species in balance. As the prey population increases, there is more food for the predators. So after a slight lag time, the predator population also increases. As the number of predators increases, more prey animals are consumed. This causes the prey population to decrease, followed by the predator population decreasing again.Some predator species play a special role in their community. They are called keystone species. When the population size of a keystone species changes, the populations of many other species are affected. Prairie dogs are an example of a keystone species. Their numbers affect most of the other species in their community. Prairie dog actions improve the quality of soil and amount of water for plants, upon which most other species in the community depend.Both predators and prey have adaptations to predation that evolve through natural selection. Predator adaptations help them capture prey. Prey adaptations help them avoid predators. A common adaptation in both predator and prey species is camouflage. Explain how predator-prey populations affect each other. What is a keystone species? Why are prairie dogs considered keystone species in their communities? How might camouflage help a predator capture its prey? Types of community interactions include predation competition symbiosis all of the above Which statement about predator-prey populations is true? The relationship between predator and prey populations keeps both populations in balance. A decrease in the prey population is followed by an increase in the predator population. An increase in the predator population is followed by an increase in the prey population. two of the above Competition can occur between members of the same species between members of different species over food, water, or space all of the above What type of relationship exists between a clownfish and sea anemone? mutualism parasitism predation commensalism An example of a commensal relationship is the relationship between cattle egrets and cattle. wolves and moose. hookworms and humans. none of the above Match each definition with the correct term commensalism close relationship between two species in which one species benefits and the other species is neither helped nor harmed predation relationship between two species in which members of one species consume members of the other species parasitism close relationship between two species in which one species benefits and the other species is harmed intraspecific competition relationship between members of the same species that depend on the same resources mutualism close relationship between two species in which both species benefit interspecific competition relationship between members of different species that depend on the same resources keystone type of species whose numbers affect the populations of many other species in the same community