Bio 6 Ch3.3 Ecology PDF

3 Ecology  3.3 WEB OF LIFE  3.3 Objectives Create food webs and ecological pyramids to represent the relationships between producers and consumers within an ecosystem. Give examples of neutralism, competition, predation, parasitism, commensalism, and mutualism.  3.3 Objectives...

3 Ecology  3.3 WEB OF LIFE  3.3 Objectives Create food webs and ecological pyramids to represent the relationships between producers and consumers within an ecosystem. Give examples of neutralism, competition, predation, parasitism, commensalism, and mutualism.  3.3 Objectives Evaluate a statement on the probability that life exists on other planets. ESSENTIAL QUESTION ? How do living things interact? Eliminate It! 1. Which of these animals doesn’t fit in with the others? ? 2. What do these three animals have in common? Eliminate It! 1. Which of these animals doesn’t fit in with the others? ? 2. What makes this animal different from the rest? Producers and Consumers Producers Consumers (or autotrophs): (or heterotrophs): organisms that can other organisms that make their own food consume the through producers photosynthesis Competition Occurs when organisms try to use the same resource Carnivores in the savanna during the dry season food chain carnivores herbivores producers food web carnivore carnivore herbivore herbivore producer decomposers herbivore  ecological carnivores pyramid herbivores producers Suppose lions and cheetahs are eliminated ? from the savanna food web. How would this affect the populations of herbivores, such as zebras? How would that, in turn, affect the ? populations of producers? Does removing carnivores from the food ? web or ecological pyramid affect only herbivores, or does it affect the entire ecosystem? Symbiosis Symbiosis: Parasitism A relationship between two organisms wherein one benefits from the other and the other is harmed by it Ticks on the host animals Symbiosis: Mutualism A mutually beneficial relationship between several members of an ecological community Oxpeckers and the host animals Symbiosis: Commensalism A relationship wherein one benefits from the other but the other is neither helped nor harmed Cattle egrets and rhinos Symbiosis: Neutralism A relationship between two organisms that share a neighborhood but do not affect each other The black mamba and the oxpeckers Symbiosis: Amensalism A relationship wherein one is injured by the other while the other is unaffected The grazing herbivores and the black mamba  ESSENTIAL QUESTION How do living things interact? Living things can interact in a multitude ? of ways, from symbiotic relationships in which different organisms benefit from their interactions to those where one partner in the relationship benefits at the expense of the other.