Ecology

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Across
  1. 1. some organisms may occupy two levels at the same time; more complicated
  2. 4. a group of organisms which look alike can interbreed and produce fertile offspring
  3. 6. consumers; species that obtain food from organic matter; herbivores and carnivores feed off living organisms
  4. 9. sunlight that hits the Earth is reflected; becomes heat; gases trap the heat; Earth becomes warmer
  5. 10. the supply of inorganic nutrients is maintained; what decomposers are; leads to ecosystems having the potential to live for long periods
  6. 11. start with a producer and move through levels of consumers; the direction of the arrows are the direction of energy flow
  7. 12. composed of interrelated, interdependent ecosystems; made up of air, land, and water
  8. 17. a group of organisms of the same species living in the same environment at the same time who are capable of interbreeding
  9. 19. the effects of a human-induced change; could be catastrophic
  10. 21. the series of processes by which carbon compounds are interconverted in the environment
  11. 22. heterotroph; eats other organisms for food
  12. 23. Study of the relationship between organisms and their environment
  13. 24. a few plants, and algae use a combination of different modes of nutrition
Down
  1. 2. detritivore and saprotroph; heterotrophs that obtain organic nutrients from dead organisms either by internal or external digestion
  2. 3. anaerobic bacteria that break down organic matter producing methane gas
  3. 5. Autotroph; makes own food
  4. 7. forms when organic matter is not fully decomposed because of acidic and/or anaerobic conditions in waterlogged soils
  5. 8. the flow of carbon from one carbon pool to another; the net difference between the carbon removal and the carbon addition; measure by gigatonnes
  6. 13. a group of populations living and interacting with each other in a habitat
  7. 14. the physical environment where individuals of a certain species can be found; must have resources to live(food, water, and mates)
  8. 15. the levels of the food chain at which the organism is found
  9. 16. producers; species that are able to make their own food from basic inorganic materials from the abiotic environment; photosynthesizers
  10. 18. the amount of energy that reaches the next trophic level
  11. 20. a community and its abiotic(non-living) environment