Study

Unit 4 Ecosystems

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  • What unit is used when we refer to the concentration for bio magnification?
    Parts per million (ppm)
  • What will happen to the food chain/web if the population of the producer decreases?
    Herbivores will decrease which will affect carnivorous organisms.
  • Explain why a large concentration of the chemical will accumulate through many consumers
    The chemicals that accumulate in an organism are passed onto the next organism in the food chain by feeding or when they are eaten.
  • How do invasive species destroy the ecosystem?
    They can spread diseases and compete with native species for resources. As a result, this will disrupt the food webs.
  • Some animals such as bats and aye aye are nocturnal, define what nocturnal means.
    Nocturnal is used to describe something that is active at night.
  • Give two wats that organism could be affected by a large concentration of the chemical.
    1.The organism could die. 2.The organism may no longer to reproduce.
  • How do invasive species spread around the world?
    It can spread through natural disasters, climate change, tourism and travel, pet trade and global trade.
  • Why do some animals like the kangaroo rats and bats rest in the shade and come out to feed at night?
    Because the temperature during the day is high, but it’s low at night.
  • What is the difference between food webs and food chains?
    Food chains are simple examples of connections in ecosystems, while food webs are lots of food chains combined meaning that they show different connections.
  • What are the tall plants in the Sonoran desert called?
    They are called “Saguaro cacti”.
  • What is the difference between habitat and ecosystem?
    A habitat is a place where an animal or organism lives. An ecosystem is the interactions of living organisms.It’s a combination of lots of habitats.
  • Explain what biotic and abiotic factors are
    Biotic factors are living components of the ecosystems such as fungi and protists while abiotic factors are the non-living parts of the ecosystems.
  • Sun->Grass->Grasshopper->Gecko->Owl. What organism is the herbivore in the food chain?
    Grasshopper
  • What do you call the last trophic level circled in the picture?
    Quaternary consumers or Apex predators
  • List the three examples of ecosystems
    Mangrove forests, sea ice in the arctic ocean, and rice paddy.
  • List 2 adaptions found in the Sonoran desert
    The woodpeckers create a place for them to live inside trees and roots absorbs a large amount of water to be able to use it later.
  • Worm->Robin->Goshawk. In which organism will the greatest concentration of the chemicals accumulate?
    Goshawk
  • …………is the death of all the members of a certain group of organisms
    Extinction
  • Sun->Grass->Mice->Weasel->Owl->Lion. Which organism gets the most energy?
    Grass
  • List three abiotic and biotic factors.
    Biotic - animals, plants, and bacterias  Abiotic - light, temperature, and soil.
  • What is DDT? How does it affect the environment?
    DDT is an insecticide When we spray it, it moves with the air and goes to an organism’s shell and it causes harm for that organism which affects the environment
  • Explain why the food web could not exist without the producers
    The producers produce the food for primary consumer, if the producers did not exist, the food web wouldn’t exist too.
  • The study of ecosystem is called……………
    Ecology
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