Study

Ecology Unit 6 Review

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  • What is the difference between a habitat and niche?
    Habitat is where the organism lives (gets water, food, shelter, space). Niche is the role the organism plays within their environment (producer, consumer).
  • What does symbiosis mean?
    a long term relationship
  • Which organism is the base of the food chain and supports the whole ecosystem?
    Producers (plants, autotrophs)
  • What is the carrying capacity of an ecosystem?
    The number of organisms that the ecosystem can support and all their needs will be met. The line on the graph where it levels out and stays straight.
  • In a population graph...you can expect the population of predators to show an increase when the population of prey shows a ________________.
    decrease (more predators to eat, less prey available and vise versa)
  • This biome has a wet and dry season, warm all year and has scattered clumps of trees.
    Savanna
  • In this symbiotic relationship, one organism is harmed (the host) and the other benefits at the detriment of the other.
    Parasitism (Example: tick that feeds on blood of animals)
  • Name 3 biotic factors in the rainforest.
    trees, parrot, snake,
  • This biome is the largest in the world and has long cold winters (Canada).
    Taiga
  • Which type of relationship exists if a wolf eats a squirrel?
    Predator-prey
  • In a balanced ecosystem, which trophic level has the highest population? The least?
    Highest- Producers- Level 1, Least- Tertiary Consumer- Level 4
  • This biome is characterized by humid, wet weather, near the equator and very biodiverse.
    Tropical Rainforest
  • How can you explain the energy transfer within an ecosystem?
    inefficient- a great loss from one trophic level to another
  • List the 5 types of consumers (heterotrophs).
    herbivore, omnivore, carnivore, decomposer, scavenger
  • Energy is tranferred from a produer to a consumer how?
    When the consumer eats the producer or the primary consumer or secondary consumer. Through what it eats.
  • The energy from the sun is transferred to heterotrophs by what means?
    indirectly- by eating a producer
  • What type of relationship exists if a hawk and a snake both eat mice?
    competition (for food)
  • Which type of relationship exists when 2 birds live in the same area and eat the same seeds?
    competition
  • Which type of consumer eats both plants and animals?
    omnivore
  • List the correct order of the organization of the environment from smallest to largest.
    organism- population- community- ecosystem- biome- biosphere
  • In a food web, the arrow depicts what information?
    direction of energy flow or energy transfer from one organism to the other
  • A marine biome is also called?
    salt water, ocean, sea
  • The ultimate source of energy for all organisms is the?
    sun
  • Which type of consumer is primarily located in trophic levels 3 & 4?
    carnivore
  • Name a top predator that would be at the top of an energy pyramid.
    Any large carnivore...hawk, coyote, wolf (Apex predator)
  • In what trophic level on the energy pyramid do you find a primary consumer?
    the second
  • In this aquatic biome, salt and freshwater mix.
    Estuary
  • This biome is dry and very cold. The coldest in the world. The ground is permanently frozen.
    Tundra
  • In a marine ecosystem, how is phytoplankton (producers) beneficial to humans?
    they feed the organisms such as fish (consumers) that we eat
  • Name 3 abiotic factors in the desert.
    sand, sunlight, humidity, air, rocks
  • Food chain...grasses-insects-bird-snake-large bird. What would happen if all the insects died out?
    The number of birds (what eats the insects) would decrease
  • Describe the symbiotic relationship of commensalism.
    In commensalism one organism benefits from the relationship and the other is unaffected (doesn't care, isn't harmed or doesn't benefit).
  • Name an adaptation an organism would need to survive in the desert.
    conserve water, adapted kidneys to need less water, lighter fur, large ears for circulation, thin outer coat, deep roots
  • Why do large, top predators (tertiary consumers) need to eat more than a primary consumer?
    The amount of energy they receive from what they eat is much less than that of a primary consumer.
  • If 2 organisms share a burrow to live in. Which type of relationship exists between them.
    Mutualism
  • What is the role of a producer in an ecosystem?
    to use energy from the sun to make food
  • This biome is where we live and is characterized by leaves that change color in the Fall, mild weather and 4 seasons.
    Temperate Deciduous Forest
  • This biome allows for very little to no growth. Only lichen and moss can survive the harsh environment (cold desert)..
    Tundra
  • Plants can grow all year round in which biome because they receive large amounts of precipitation?
    Tropical Rainforest
  • ________________________ is an interaction between abiotic and biotic factors in an area.
    Ecosystem