Ecology Unit Review

Master ecology! Explore predator-prey, symbiosis, and energy flow in this interactive review.

Ecological Relationships Use the video to complete the questions below. Predator-Prey Relationship Graph Correctly label the red and blue lines for the graph below with the words Predator or Prey. Prey Predator Complete the fill in the blank Predator-Prey Relationship graph summary. The predator prey relationship consists of the interactions between two species and their consequent effects on each other. In the predator prey relationship, one species is feeding on the other species. The prey species is the animal being fed on, and the predator is the animal being fed. The predator prey relationship develops over time as many generations of each species interact. In doing so, they affect the success and survival of each other’s species. The process of evolution selects for adaptations which increase the fitness of each population. Scientists studying population dynamics, or changes in populations over time, have noticed that predator prey relationships greatly affect the populations of each species, and that because of the predator prey relationship, these population fluctuations are linked.Source: Correctly match the definition to the symbiotic relationship. Mutualism symbiotic relationship in which both species benefit Commensalism symbiotic relationship in which one species benefits while the other species is not affected Parasitism symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed What is the relationship between the acacia tree and the acacia ant? mutualism commensalism Parasitism What kind of a relationship do barnacles have with whales? mutualism commensalism parasitism Energy Pyramid How much energy is transferred from one trophic level to the next? 100% 10% 1 Using the image to determine where the energy for this food web comes from. Plants Animal Soil Sun Draw a symbiotic relationship between two organisms. Complete the fill in the blank for the producers in a forest food web. Plants and trees make up the producer level of the deciduous forest food web. They use sunlight to convert carbon dioxide into sugars and the reaction gives off oxygen as a byproduct. To put it another way, plants make biomass and stored energy in the food web. The consumer organisms in the next level above such as insects, deer and rodents, eat the producers.Source: Complete the fill in the blank for forest consumers. The primary consumers are the large herbivores like deer as well as insects, rabbits and rodents. These creatures eat mostly plants, seeds, berries and grasses. Secondary consumers are the carnivorous animals that eat only herbivores. These consumers include smaller predators like foxes, but ants, fish, spiders, snakes and rats are secondary consumers, too.Higher up in the forest food web are tertiary consumers, the carnivores and omnivores that eat the animals on the secondary consumer level.Source: Complete the fill in the blank for the decomposers found in a forest ecosystem. Decomposers like earthworms, bacteria, fungi and insects take care of the dead plants and animals in the deciduous forest. They break them down into smaller and smaller parts which ultimately creates new soil. The food web continues as plants in the producer level feed on the nutrients.Source: